changeset 1190:f514894ec2fd

merged flys-artifacts/2.5
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:17 +0200
parents b48c36076e17 (current diff) 45cfab4eddab (diff)
children 54365104835c
files
diffstat 201 files changed, 36026 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/ChangeLog	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,5950 @@
+2011-09-16  Bjoern Schilberg <bjoern.schilberg@intevation.de>
+
+	* doc/mapserver/fontset.txt:
+	  Added initial font set for km_annotation layer.
+	* doc/mapserver/symbols/symbols.sym:
+	  Added square symbol for km and fixpoint layer.
+	* doc/mapserver/saar-mapfile.map:
+	  Adjust styling in the flys karte-archiv way.
+
+2011-09-19  Ingo Weinzierl <ingo@intevation.de>
+
+	Tagged RELEASE 2.5
+
+	* Changes: Prepared changes for release.
+
+2011-09-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelSelectState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelPairSelectState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Removed
+	  needless imports.
+
+2011-09-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data.xml: Improved datacage configuration for DEMs.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Query DGMs by the given ID in the FLYS data pool - not by given range
+	  values.
+
+2011-09-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data.xml: Added a section for DEMs to the floodmap
+	  section.
+
+2011-09-16  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix build.
+
+	* src/main/java/de/intevation/flys/artifacts/state/WDifferencesState.java:
+	  Fix build.
+
+2011-09-16  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Take a given WaterlevelPair-String, load artifact and plot the diff.
+
+	* src/main/java/de/intevation/flys/artifacts/state/WDifferencesState.java:
+	  Load correct artifacts.
+
+2011-09-16  Bjoern Schilberg <bjoern.schilberg@intevation.de>
+
+	* doc/mapserver/*: Added inital mapserver configuration files.
+
+2011-09-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data.xml: Moved the system specific configuration into a
+	  macro to the top of the configuration document. Call this macro at the
+	  end of the user specific part and in the part that should contain the
+	  system specific stuff only!
+
+2011-09-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Defined createItem() here and adapted some method signatures, because I
+	  need the CallContext deeper in code than expected.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelSelectState.java:
+	  Write the name of the selected waterlevel into the static DESCRIBE.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java:
+	  Adapted method signatures that have been changed in DefaultState.
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Removed method createItem() which is now defined in the upper class
+	  DefaultState.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added string for selected
+	  waterlevel that is displayed in static UI.
+
+2011-09-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added state label for
+	  waterlevel selection.
+
+2011-09-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelSelectState.java:
+	  Validate incoming data string and strip brackets.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Fetch waterlevel data from external Artifact if existing. If no external
+	  Artifact is specified that provides waterlevel data, we gonna try to
+	  fetch it from the current Artifact.
+
+2011-09-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelPairSelectState.java:
+	  Removed needless import which caused compile errors.
+
+2011-09-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added a transform() method. This method should be used to transform
+	  input data in form of a string into a better data structure. This state
+	  provides a simple implementation which just returns a StateData object
+	  that contains exactly the input string.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Transform
+	  input strings using DefaultState.transform() before they are added to
+	  its data pool.
+
+2011-09-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Made collection solid for the case if it has no Artifacts.
+
+2011-09-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java: Fetch Artifact
+	  from ArtifactDatabase properly. Write better error logs if that process
+	  fails.
+
+2011-09-14  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Extend WDifferences branch to have calculations in dedicated, new state.
+
+	* doc/conf/artifacts/winfo.xml: Added new State and Transition in
+	  WDifferences-branch.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelPairSelectState.java:
+	  New state.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java:
+	  Specify to not take input, prepare getting other facets.
+
+2011-09-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java: This
+	  state now desires the UIProvider 'dem_datacage_panel'.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelSelectState.java:
+	  New. This state is used to define the desired UIProvider
+	  'wsp_datacage_panel'.
+
+	* doc/conf/artifacts/winfo.xml: Added a new way to start a WSPLGEN
+	  calculation when choosing the calculation type 'floodmap'.
+
+2011-09-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java: Merge
+	  facets only if their name AND their owner artifact are equal.
+
+2011-09-14  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Partial Fix flys/issue304 (3) (Baseline).
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java:
+	  Show Baseline in WDifferencesPlot.
+
+2011-09-14  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix flys/issue310 (cross-section theme).
+
+	* doc/conf/themes.xml: CrossSection-Themes: profile thin, water blue.
+
+2011-09-14  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix flys/issue310 (cross-section theme).
+
+	* doc/conf/themes.xml: CrossSection-Themes: profile thin, water blue.
+
+2011-09-13  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Add an quick and simple error to the report if an error occured while
+	  WSPLGENJob creation.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added error messages for
+	  WSPLGEN job creation errors.
+
+2011-09-13  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix crash when drawing StickyAxisAnnotation when no range was given.
+ User-directed issues remain ( flys/issue303 ).
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java
+	  (draw):
+	  Guard access to domainAxis, rangeAxis and the corresponding ranges.
+	  Warn and exit if any was null.
+
+2011-09-13  Ingo Weinzierl <ingo@intevation.de>
+
+	flys/issue290 (Karte: Eingabe von Differenzen zw. WSP und Gelände findet
+	keine Ausprägung in der Karte)
+
+	* doc/conf/mapserver/wsplgen_class.vm: Added styles for DIFF attribute.
+
+	* doc/conf/mapserver/mapfile.vm: Set debug default to '5'.
+
+2011-09-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Add a first WSPLGEN status message (notifies the user about a
+	  queued job) after the job has been added to the Scheduler.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added english and german
+	  status message text.
+
+2011-09-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: Write
+	  shapefiles only if there are features for it existing.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  A WSPLGEN facet is only created, if the calculation was successfully
+	  added to the Scheduler. A barrier facet is only created if the WSPLGEN
+	  calculation has been added to the scheduler AND if there are digitized
+	  geometries existing.
+
+2011-09-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Copied and slightly modified implementation of guessWaterIncreasing from
+ WQKms to (new) DataUtils. Accidentally commited usage in last commit, to
+ correct orientation of diagram (invert x axis).
+
+	* src/main/java/de/intevation/flys/utils/DataUtils.java:
+	  New file with guessWaterIncreasing implementation from WQKms,
+	  slightly adjusted.
+
+2011-09-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Cosmetics.
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WKmsImpl.java:
+	  Cosmetics.
+
+2011-09-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Added CSV Export for W-Differences.
+
+	* doc/conf/conf.xml: Added Exporter.
+	
+	* doc/conf/artifacts/winfo.xml: Removed transition over distances
+	  state, added export outputmode and facet.
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesExporter.java:
+	  New, CSV-Exporter for WDifferences.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java:
+	  Add export facet.
+
+2011-09-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java:
+	  Cosmetics, docs.
+	
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java,
+	  src/main/java/de/intevation/flys/exports/AbstractExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java:
+	  Cosmetics.
+
+2011-09-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Sourced the code to append a concrete data item to the static DESCRIBE
+	  part out to an own method (appendStaticData()).
+
+	* src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java:
+	  Override appendStaticData() to suppress the GeoJSON string to be
+	  included in the static DESCRIBE.
+
+2011-09-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/CrossSectionWaterLineFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java,
+	  src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Removed needless imports.
+
+2011-09-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/CalculationMessage.java:
+	  New. A subclass of Message (in the Artifacts system). It stores a
+	  string message and a progress (in form of step x/y).
+
+	* src/main/java/de/intevation/flys/wsplgen/JobObserver.java: The observer
+	  now writes background messages into the artifact system using the
+	  CallContext.addBackgroundMessage(). We use instances of
+	  CalculationMessage here, that makes the WINFOArtifact able to put
+	  progress information into the Artifact's DESCRIBE as well.
+	  
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Write
+	  status message and progress information into the DESCRIBE if the
+	  Artifact has started a background process.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix flys/issue280 .
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  Do not draw boxes around annotations.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+ Fix flys/issue279 .
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Fix behaviour in various thinkable malconditions.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Made one case of cross section fetching more robust.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Fix Facet name and Legend of W-Differences, also insert state to specify
+	distance.
+
+	* doc/conf/artifacts/winfo.xml: Add additional transitions to walk over
+	  distances state.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java:
+	  Set facets description.
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java:
+	  Take facets description as legend.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added configuration to kick-in w-differences branch of winfo.
+
+	* doc/conf/conf.xml: Register new (w-differences) OutputGenerators.
+
+	* doc/conf/artifacts/winfo.xml: Register new state and transitions.
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Added new (w-differences) calculation mode.
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveInfoGenerator.java:
+	  New file, implementing naive approach to display w-differences
+	  (accidentially omitted in last commit).
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added very stubby WDifferences State/OutGenerator for WINFOArtifact.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Added w_differences facet type.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java:
+	  New file, implements naive approach to calculate w-differences (of
+	  calculations identified by hardcoded uuids!) and register respective facet.
+
+	* src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java:
+	  New file, implementing naive approach to display w-differences.
+
+2011-09-09  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Implement getArtifact(uuid,context) in FLYSUtils.
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java (getArtifact):
+	  Added implementation, partially resolving a TODO. Added logger instance.
+
+2011-09-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENCalculation.java:
+	  New. This sublcass of Calculation saves warnings and errors that occur
+	  while WSPLGEN is running.
+	  Note, that the interface of this class doesn't exactly apply the interface
+	  of Calculation. Maybe, we should generalize this interface!
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java: Stores
+	  an instance of WSPLGENCalculation now. We use this instance to save
+	  warnings and errors.
+
+	* src/main/java/de/intevation/flys/wsplgen/ProblemObserver.java: Use the
+	  WSPLGENCalculation to save errors and warnings.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENReportFacet.java:
+	  New. This facet is used for WSPLGEN reports. It stores an instance of
+	  WSPLGENCalculation which saves ERRORS and WARNINGS that occur while
+	  WSPLGEN execution.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Create a WSPLGENReportFacet for WSPLGEN reports.
+
+	* doc/conf/conf.xml: Added an OutputGenerator 'report' for WSPLGEN
+	  reports.
+
+	* doc/conf/artifacts/winfo.xml: Added an output 'report' for WSPLGEN
+	  reports.
+
+2011-09-08  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/math/WKmsOperation.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Cosmetics, docs.
+
+2011-09-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/wsplgen/JobObserver.java: Small
+	  adjustments that makes it easier to subclass this observer.
+
+	* src/main/java/de/intevation/flys/wsplgen/ProblemObserver.java: New. A
+	  sublcass of JobObserver which analyses the WSPLGEN output for errors and
+	  warnings.
+
+	* src/main/java/de/intevation/flys/wsplgen/JobExecutor.java: Use
+	  JobObserver and ProblemObserver to track the whole WSPLGEN output and
+	  print number of errors/warnings to log output.
+
+2011-09-08  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added translation of w_differences.
+
+	* src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_de.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages.properties:
+	  Added "w_differnces" translation.
+
+2011-09-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Appended
+	  a new attribute 'background-processing' to the DESCRIBE of this
+	  Artifact. Its value is 'true' if this Artifact has started a background
+	  thread which has not finished yet - otherwise it is 'false.
+
+2011-09-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java,
+	  src/main/java/de/intevation/flys/utils/GeometryUtils.java: Moved the
+	  code to determine the extent of a river based on its axis to
+	  GeometryUtils.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Determine the extent of the selected river and set the WMSLayerFacet's
+	  extent attribute.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added Themeing support for CrossSection Diagrams.
+
+	* doc/conf/themes.xml:
+	  Added new themes and mappings, slightly modified longitudinalsection
+	  theme.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	In CrossSection Diagram fix subtitle to display the km of which the data is
+	actually displayed (maybe contrasting users wish).
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  (getCrossSectionSnapKm): New method to fetch the actual km of crosssection.
+
+	* src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Add correct km to charts subtitle.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Fix various display-issues like i18n in cross-section diagram.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Set description of facets to expected values.
+
+	* src/main/java/de/intevation/flys/artifacts/exports/CrossSectionGenerator.java:
+	  Fix i18n of chart title. Set subtitle to expected value, pass facets
+	  description to StyledSeries to see expected legend.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Cosmetics, resolved refactoring todo.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java
+	  (compute, computeAdvance, computeFeed): Refactored, extracted method,
+	  resolving duplicate code and TODO.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Fix waterline "calculation" at given km. Chosen approach is
+	"head-through-wall".
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Some refactoring to do the same calculation twice easier and be able
+	  to "cross" waterline against correct profile data.
+
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Fix setting of kilometer for profile (not yet waterlevel) of cross section
+	diagram.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  (getCrossSectionData): Respect corss_section.km data; do naive linear
+	  search for profile data for this km.
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionFacet.java:
+	  Declare a ComputeType.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Implement computeFeed.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Minor cosmetics.
+
+2011-09-07  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionWaterLineFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DataFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/state/DefaultState.java:
+	  Cosmetics, docs.
+
+2011-09-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/mapserver/barrier_polygons_class.vm,
+	  doc/conf/mapserver/barrier_lines_class.vm,
+	  doc/conf/mapserver/wsplgen_class.vm: Default Mapserver styles for
+	  barriers and WSPLGEN results. Those styles are only used as long as we
+	  don't have map specific themes (as already used in charts).
+
+	* doc/conf/mapserver/layer.vm: Implements a fallback mechanism for styling
+	  barrier lines/polygons and WSPLGEN results.
+
+	* src/main/java/de/intevation/flys/artifacts/model/LayerInfo.java: Added a
+	  getStyle() method that currently returns "null". This method needs to be
+	  implemented when map themes are introduced.
+
+2011-09-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/LayerInfo.java: Renamed
+	  some attributes to make their job in the mapfile more obvious.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: Added
+	  new facet type for barriers.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java: Add
+	  a facet for the barriers layer.
+
+	* src/main/java/de/intevation/flys/utils/MapfileGenerator.java: Parse
+	  barriers (lines and polygons) and create two new layers for each type -
+	  those layers are grouped.
+
+	* doc/conf/mapserver/layer.vm: Renamed attribute based on changes in
+	  LayerInfo and added support for Group-Layers.
+
+2011-09-06  Raimund Renkert <raimund.renkert@intevation.de>
+
+	* doc/conf/conf.xml:
+	  Added driver to database configuration for use with postgresql.
+
+2011-09-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/mapserver/mapfile.vm: Removed FONTSET attribute and set quotes
+	  for SHAPEPATH.
+
+2011-09-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENFacet.java:
+	  Removed. We gonna use the WMSLayerFacet until now.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Add a WMSLayerFacet after we triggered the Scheduler to start a WSPLGEN
+	  calculation.
+
+2011-09-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/mapserver/layer.vm,
+	  doc/conf/mapserver/mapfile.vm: Small bugfixes and style improvements.
+
+	* src/main/java/de/intevation/flys/wsplgen/JobExecutor.java: Trigger the
+	  MapfileGenerator after a WSPLGEN job has finished regardless if it has
+	  been finished successfully or not.
+
+2011-09-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* pom.xml: Added Apache Velocity 1.7 for templating support.
+
+	* doc/conf/conf.xml: Added config options for mapserver/template relevant
+	  stuff.
+
+	* doc/conf/mapserver/mapfile.vm,
+	  doc/conf/mapserver/layer.vm: New. A default mapfile template and a
+	  template used for layers.
+
+	* src/main/java/de/intevation/flys/artifacts/model/LayerInfo.java: New.
+	  This class is used while reading WMS layer relevant information from
+	  filesystem.
+
+	* src/main/java/de/intevation/flys/utils/MapfileGenerator.java: New. This
+	  thread is used for creating mapfiles for Mapserver. The MapfileGenerator
+	  runs in daemon mode (own thread) and creates mapfiles based on WMS
+	  layer relevant information read from filesystem.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java,
+	  src/main/java/de/intevation/flys/utils/FLYSUtils.java: Moved shapefile
+	  specific XPath expressions from FloodMapState to FLYSUtils which is a
+	  better place to use it in other classes (as MapfileGenerator).
+
+2011-09-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java:
+	  Bugfixed broken attribute assignment.
+
+	* src/main/java/de/intevation/flys/wsplgen/JobExecutor.java: Call
+	  CallContext.afterBackground() after a WSPLGEN job has finished to remove
+	  the background lock from Artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Call CallContext.afterCall(BACKGROUND) to lock the Artifact for
+	  background processing.
+
+2011-09-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/wsplgen/JobExecutor.java: New. This
+	  class is used to start WSPLGEN for a specific WSPLGENJob. The System
+	  property "wsplgen.bin.path" tells the JobExecutor where the WSPLGEN
+	  binary is placed (which means in general, the property points to the
+	  'wsplgen.exe').
+
+	* src/main/java/de/intevation/flys/wsplgen/Scheduler.java: New. This
+	  scheduler currently allows to start just a single WSPLGEN Thread. All
+	  WSPLGEN calculations should be started using Scheduler.addJob().
+
+	* src/main/java/de/intevation/flys/wsplgen/JobObserver.java: New. This
+	  thread reads log messages from WSPLGEN and listens for specific
+	  messages. It should be used to update status messages of the WSPLGEN
+	  calculation that is currently running.
+	  There is a System property that tells the JobObserver to log all WSPLGEN
+	  output to log4j: enable WSPLGEN output with "-Dwsplgen.log.output=true".
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java: Added
+	  the FLYSArtifact, the current working directory and the CallContext.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Use the Scheduler to start new WSPLGEN calculations.
+
+2011-09-02  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Add CrossSectionInfoGenerator.
+
+	* src/main/java/de/intevation/flys/exports/CrossSectionInfoGenerator.java:
+	  New, trivial implementation of CrossSectionInfoGenerator.
+
+	* doc/conf/conf.xml:
+	  Register CrossSectionInfoGenerator.
+
+2011-09-01  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Cleanups of CrossSection*.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  New methods to retrieve name of utilized CrossSection.
+
+	* src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Cleanup, get rid of copied unused method, documentation and more sensible
+	  translations.
+
+	* src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_de.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages.properties:
+	  Added cross_section* translations, also cleanups.
+
+2011-09-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Set the "typ" attribute of lines and polygons in barrier shapefiles.
+
+2011-09-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Set the Z values of line and polygon barrier geometries. Both barrier
+	  shapefiles will contain 3D geometries now.
+
+2011-09-01  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Get real data to display in CrossSection (although ignorant of
+	parameterization), making use of the showcase code of the CrossSectionApp-
+	Standalone application.
+
+	* doc/conf/artifacts/winfo.xml: Add new facet (~waterline) to state/out.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  New methods to get relevant data. So far just takes the first value of
+	  everything and assuming a waterlevel at 130m.
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionWaterLineFacet.java:
+	  New Facet responsible of water level in cross section.
+
+	* src/main/java/de/intevation/flys/artifacts/charts/CrossSectionApp.java:
+	  Made some functionality publicly and statically available.
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionFacet.java:
+	  Update call.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: Added new
+	  Facet type.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Added new Facet to out.
+
+	* src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Respect new facet and facets data.
+
+2011-09-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: Close an open
+	  shapefile transaction and catch exceptions which are thrown while
+	  shapefile creation here. If there occured an error, this functions
+	  returns FALSE, otherwise TRUE.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Removed exception handling while shapefile creation - this is done in
+	  GeometryUtils now.
+
+2011-09-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Renamed the file for WSPLGEN required waterlevels to "waterlevels.wst".
+	  WSPLGEN did not work with the former "waterlevels.txt" file.
+
+2011-09-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: New static
+	  function that builds new SimpleFeatureTypes with additional attributes.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Write attributes "ELEVATION" and "KILOMETER" into the crosssection
+	  tracks shapefiles.
+
+2011-08-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java: Added a method
+	  stub that should return a FLYSArtifact based on a given UUID.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Write the selected WST file for WSPLGEN. Note, that this is the WST file
+	  of the current WINFO artifact. Furthermore, there is currently no way
+	  for the user to select a column from WST file, so we currently use the
+	  column that is written to WST file at first.
+
+2011-08-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Changed
+	  the parameter order of a compute(...) method. This makes me able to call
+	  this without a hash value.
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java:
+	  Adapted the parameter order of the compute() call (see above).
+
+2011-08-31  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	More bones to CrossSection sceleton.
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/CrossSectionFacet.java:
+	  New, yet trivial implementations of Factory and Facet for CrossSections.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Add new CrossSection- (instead of Default-)Facet.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Adjusted to use (touch) new Factory and Facet.
+
+2011-08-31  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Cosmetics.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Cosmetics.
+
+2011-08-31  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Cosmetics.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/model/MainValuesQFacet.java,
+	  src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  Removed obselete imports.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Removed obselete imports, whitespaces.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Whitespaces, docs.
+
+2011-08-31  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Fix translations of Main Values Facets.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Do acrobatics to keep state transient but get translated title.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesQFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/MainValuesWFacet.java:
+	  Changed constructor to get description (which is then already be translated)
+	  dynamically, adjust deepCopy.
+
+	* src/main/java/de/intevation/flys/states/StaticState.java:
+	  Adjust constructor accordingly.
+
+2011-08-31  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Add sceleton for CrossSection outs.
+
+	* doc/conf/artifacts/winfo.xml:
+	  Added new output mode to respective state of winfo artifact configuration.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Add new Dummy-Facet in state.
+
+	* doc/conf/conf.xml:
+	  Registered new OutputGenerator.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Added new CROSS_SECTION type.
+
+	* src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java:
+	  New, stubby skeleton for an CrossSectionGenerator.
+
+	* src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_de.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages.properties:
+	  Added cross_section translation, also cleanups (e.g. main values).
+
+2011-08-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java: Marked
+	  required parameters with a comment.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Export floodplains (german 'Talaue') to shapefile and write its file
+	  path into the WSPLGEN job.
+
+2011-08-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Search for a DGM that fits to the current river and km range and write
+	  its file path into the WSPLGEN job.
+
+2011-08-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: Improved
+	  exception handling: exceptions are catched in GeometryUtils now.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Write river axis and crosssections to shapefiles and save shapefile
+	  pathes in WSPLGENJob.
+
+2011-08-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Use the coorect SRID for reading GeoJSON and writing line/polygon
+	  shapefiles.
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: Use a
+	  concrete coordinate system while feature type creation.
+
+2011-08-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* pom.xml: Added GeoTools 2.7.2 dependencies for Shapefile, GeoJSON and
+	  EPSG support.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java: Store
+	  'LIN' parameter in a list now. A WSPLGEN parameter might contain many
+	  LINs.
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: New functions
+	  to create FeatureTypes and to write shapefiles.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Write user specified barriers into a shapefile placed in the artifact
+	  directory.
+
+2011-08-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java: Added a function
+	  that extracts the SRID defined in the global configuration file for a
+	  given river.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  Removed the code that extracts the river SRID - use FLYSUtils instead.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Use FLYSUtils.getRiver instead of WINFOArtifact.getRiver.
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java:
+	  Use FLYSUtils.getRiver instead of WINFOArtifact.getRiver.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Use FLYSUtils.getRiver instead of WINFOArtifact.getRiver.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Use FLYSUtils.getRiver instead of WINFOArtifact.getRiver.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Commit accidentally omitted result of refactoring (WINFO/FLYSUtils/getRiver).
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Removed implementations of getRiver, update calls to use FLYSUtils.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Interpolate Q main values, generate interpolated W main values on the fly from
+	Q main values.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  (getGaugeDatum): removed, obsolete
+	  (getLocation): new, gets location
+	  Use WstValueTable to look up interpolated Qs of MainValues. In absence of
+	  the same functionality for Ws, generate W Main Values from Q Main Values.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Use new helper class FLYSUtils, minor refactorization.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Use new functionality of helper class, convenience of FLYSArtifact.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Refactored to use new Helper class FLYSUtils, moved getRiver-functionality
+	in there.
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java (getRiver):
+	  New function to retrieve river of an artifact, slightly modified from
+	  WINFOArtifact.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java:
+	  Removed implementations of getRiver, update calls to use FLYSUtils.
+
+2011-08-29  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Minor cosmetics.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Resolved a TODO.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Added some documentation.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java:
+	  Minor cosmetic.
+
+2011-08-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data.xml: Made it Oracle compatible.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/CompiledStatement.java:
+	  If running in debug mode log executed statements.
+	  Helps debugging Oracle connections.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Set some WSPLGENJob parameters which are stored at FLYSArtifact.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/FLYSUtils.java: New. This helper
+	  class should provide some basic FLYS stuff. Currently, there are functions
+	  that return the km range/location.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Removed
+	  the methods that return the km range/locations. This is implemented in
+	  FLYSUtils now.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/exports/ChartGenerator.java: Adapted
+	  the WINFO method calls to retrieve the km range/locations - call
+	  FLYSUtils now.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: New method
+	  to destroy a single state.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Cosmetic, remove debug output and comments, minor style adjustments.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added limited themeing-support for MainValues.
+
+	* doc/conf/themes.xml:
+	  Added Q/W-MainValues themes.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Added limited theming support, add legend entry for main values.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Added a configuration node that points to the directory
+	  where shapefiles should be stored in.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java: New.
+	  This class is used to save/write the parameter for a WSPLGEN calculation.
+	  WSPLGEN's *.par files are written using the toFile() method.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  A directory for all WSPLGEN stuff is created in computeAdvance() - those
+	  directory and all its contained files are removed in endOfLife().
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/ThemeUtil.java:
+	  New Util to work with theme-related stuff.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Use NamedDoubles instead of MainValues, try to adjust scale of Ws.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Use NamedDoubles instead of MainValues, generalize annotation handling, to
+	  allow easier reusability and themeing.
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  Added convenience constructor, exemplary switch on bordered text.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* doc/conf/meta-data.xml:
+	  Recommend MainValues for Computed discharge curves.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	New NamedDouble class which implements a <String,double>-pair.
+
+	* src/main/java/de/intevation/flys/artifacts/model/NamedDouble.java:
+	  New, implementation of a double with a string or vice versa.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Call
+	  State.endOfLife() for all States when endOfLife() of the Artifact is
+	  called.
+
+2011-08-26  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Also plot "W"-MainValues (on vertical axis), take correct parameters, but
+	do not convert to correct scale (cm vs NN+m).
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  Naive attempt at allowing the vertical axis to be sticked at.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Store Q and W MainValues separately, add them to plot as annotations.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Serve the MainValues, parameterized on river and location, Q and W.
+	  Removed Facet-implementation.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Updated Facet Types.
+
+	* src/main/java/de/intevation/flys/artifacts/model/MainValuesQFacet.java:
+	  src/main/java/de/intevation/flys/artifacts/model/MainValuesWFacet.java:
+	  New, trivial facets, extracted from MainValuesArtifact.
+
+2011-08-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Call
+	  State.endOfLife() of each State that is no longer in the queue of the
+	  artifact when this artifact steps back to a previous state.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Plot MainValues delivered by MainValuesFacet in much the same ways than
+	  Annotations in LongitudinalSection plots.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  Prepare further differentiation between Annotations that stick to X or Y-
+	  Axis, copied some positioning logic into StickyAxisAnnotation
+	  implementation.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Minor cosmetics.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added MainValue-Fetching-Capabilities to MainValuesArtifact.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java
+	  (initialize, getMinValues):
+	  Let MainValuesArtifact return "real" MainValues, although ignorant of all
+	  parameterization.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java
+	  (MainValueFacet):
+	  Improved and straightened implementation, added code-Annotations and Todos.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java
+	  (MainValueFacet):
+	  Improved and straightened implementation, added code-Annotations and Todos.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java
+	  (getState):
+	  Resolved multiple creation of state (yet not very clean).
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/AnnotationFacet.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Cosmetics, docs.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java:
+	  Cosmetics.
+
+2011-08-25  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Added new (MainValues) Facet-Type.
+
+2011-08-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java:
+	  Added a method that returns a River object based on its database id.
+
+	* src/main/java/de/intevation/flys/artifacts/RiverAxisArtifact.java: The
+	  data that is required for this artifact is fetched from database instead
+	  from a Master-Artifact. The creation of static artifacts should use
+	  database ids instead of cloning a Master-Artifact.
+
+2011-08-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Removed needless imports.
+
+2011-08-24  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added configuration for factory and rule for MainValueArtifacts.
+
+	* doc/conf.xml:
+	  Add a mainvalue factory to serve MainValueArtifacts.
+
+	* doc/conf/meta-data.xml:
+	  Recomment mainvalue artifact when computed_discharge_curve can be put out.
+
+2011-08-24  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Let MainValuesArtifact have a state, outputmode and facet.
+
+	* src/main/java/de/intevation/flys/artifacts/states/StaticState.java:
+	  New, a non-abstract DefaultState.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Progressed with implementation, use StaticState to hook output modes and
+	  facet in; use (Static)FLYSArtifact implementation.
+
+2011-08-24  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Smaller cosmetics.
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Cosmetics in comments.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java:
+	  Added @Override annotations.
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java:
+	  Use brackets to improve readability of ternary operator.
+
+2011-08-24  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data.xml: Use "ids" in user specific part, too.
+
+2011-08-24  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data.xml: s/db-ids/ids/g to unify system and user specific
+	  loading.
+
+2011-08-24  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Extracted access to state and states in order to have fewer places to
+	  modify when going for single/trivial state- artifacts.
+
+2011-08-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java:
+	  Append the river's srid to the WMSLayerFacet.
+
+2011-08-24  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Minor fixes, ressurect Facet implementation as inner class.
+
+2011-08-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Moved the input of barriers one state
+	  earlier where the scenario is selected as well.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java:
+	  This state now desires the "map_digitize" UI provider and returns both
+	  items "scenario" and "uesk.barriers" in the dynamic describe part.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Removed the UI provider and the computeFeed() which is no longer needed,
+	  because there is no more user input in this state.
+
+2011-08-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  Repaired broken xpath expressions (the config changed in one of the last
+	  commits) and make use of the variable support in xpath expressions to
+	  replace the rivername.
+
+	* src/main/java/de/intevation/flys/artifacts/WMSBackgroundArtifact.java:
+	  Save the rivername while initializing this artifact. This is now
+	  necessary, because each river can have its own background wms
+	  configured.
+
+2011-08-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  Repaired broken river-wms initialization.
+
+2011-08-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DataFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DurationCurveFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/ManagedFacetAdapter.java,
+	  src/main/java/de/intevation/flys/artifacts/model/AnnotationFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WSPLGENFacet.java:
+	  Made facets cloneable with the right type.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java,
+	  src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Removed superfluous imports.
+
+2011-08-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Declare the first artifact of an output as master artifact (artifacts
+	  are ordered by their creation time).
+
+2011-08-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  Removed facet interface.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Make artifacts cloneable. TODO: Override deepCopy() in subclassed
+	  states and facets.
+
+2011-08-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Added the MapInfoService and adapted the floodmap
+	  configuration. Now, each river can have its own background wms layer
+	  defined.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java:
+	  New. This service returns some basic information used to create maps for
+	  a specific river. The name of the desired river needs to be defined at
+	  "/mapinfo/river/text()".
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  Adapted an xpath expression that points to the srid of a river in the
+	  floodmap configuration (which changed).
+
+2011-08-22  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Build out/facet filter from XML document passed at creation time.
+
+2011-08-22  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Added some code to filter outs/facets by an optional positive list.
+	  This is needed to only expose parts of the facets. This
+	  is needed for artifacts which are loaded into a collection.
+	  TODO: create the filter from the XML document passed at creation
+	  time.
+
+2011-08-22  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Moved all
+	  WINFO specific code to WINFOArtifact. FLYSArtifact is now only revolving 
+	  about state affairs.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Re-inserted
+	  the specific stuff here.
+	  
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ChartGenerator.java:
+	  Adjusted the casts.
+
+2011-08-22  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data.xml: Filter by outs in user template part.
+
+2011-08-22  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Defined an input value for the GeoJSON
+	  string to save user defined barriers in the map.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  Added a computeFeed() method. In addition, this state now prefers the
+	  "noinput" UI provider.
+
+2011-08-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Each river requires a SRID definition. This
+	  definition is used to transform the river's geometries into the desired
+	  projection.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java:
+	  This facets are able to save a SRID.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  The extent that is written into the WMSLayerFacet is determined by the
+	  boundary of the geometry.
+
+	* src/main/java/de/intevation/flys/utils/GeometryUtils.java: New. A
+	  utility class that provides helper functions for geometries. Currently,
+	  one function is defined, that creates a boundary string for OpenLayers.
+
+2011-08-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ProfileDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RangeState.java:
+	  Removed superfluous imports.
+
+2011-08-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Removed CallContext from state validation. It is not needed and hindered
+	  the extraction of all out of an artifact if you don't have a
+	  call context (like initial scan of datacage database).
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Extract all outs now.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/FloodplainChoice.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ProfileDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RangeState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Adjusted calls.
+
+2011-08-19  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties:
+	  Added lacalization of "Streckenfavoriten".
+
+2011-08-19  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Picky white-space cosmetics.
+
+2011-08-19  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added stub implementation of new MainValuesArtifact.
+
+	* src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java:
+	  New. Stub implementation for new MainValuesArtifact.
+
+2011-08-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fixed flys/issue262
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java:
+	  Unified user and system tempate.
+	  Looks for "/artifact-database/metadata/template/text()"
+	  in conf.xml. Defaults to "${artifacts.config.dir}/meta-data.xml". If user id is
+	  given its the default connection for contexts.
+
+	* doc/conf/conf.xml: Adjusted
+	* doc/conf/meta-data-system.xml, doc/conf/meta-data-user.xml: Deleted.
+	* doc/conf/meta-data.xml: Unified version of user and system template.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/App.java:
+	  Adjusted the test program.
+
+2011-08-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fixed flys/issue260
+
+	* doc/conf/meta-data-user.xml: Uses master_artifacts view now.
+
+2011-08-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Added view master_artifacts to select
+	  the master artifacts of the collections more easily.
+	  To upgrade existing database:
+
+	    CREATE VIEW master_artifacts AS
+	        SELECT a2.id             AS id,
+	               a2.gid            AS gid,
+	               a2.state          AS state,
+	               a2.creation       AS creation,
+	               ci2.collection_id AS collection_id
+	        FROM   collection_items ci2 
+	               JOIN artifacts a2 
+	                 ON ci2.artifact_id = a2.id 
+	               JOIN (SELECT ci.collection_id AS c_id, 
+	                            MIN(a.creation)  AS oldest_a 
+	                     FROM   collection_items ci 
+	                            JOIN artifacts a 
+	                              ON ci.artifact_id = a.id 
+	                     GROUP  BY ci.collection_id) o 
+	                 ON o.c_id = ci2.collection_id 
+	        WHERE  a2.creation = o.oldest_a;
+
+	 TODO: Use the view in the templates.
+
+2011-08-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data-user.xml: Removed state filter because it was broken.
+	  Simplified by joining two contexts.
+
+2011-08-18  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  Fix issues with lines of annotation when zoomed (wrong scale used).
+
+2011-08-18  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added legend for annotations to LongitudinalSectionDiagram.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Added a pseudo-dataseries/collection to employ existing infrastructure for
+	  displaying localized label for Annotations (yet unthemed).
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties:
+	  Made label-string available for localization.
+
+2011-08-17  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Moved StickyAxisAnnotation into new package de.intevation.flys.jfree .
+
+	* src/main/java/de/intevation/flys/exports/StickyAxisAnnotation.java:
+	  Deleted/moved to src/main/java/de/intevation/flys/jfree/ .
+
+	* src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java:
+	  New/moved from src/main/java/de/intevation/flys/export/ , adjusted
+	  package statement, made class public.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Added import statement for de.intevation.flys.jfree.StickyAxisAnnotation .
+
+2011-08-17  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Extracted and renamed CustomAnnotation to StickyAxisAnnotation. Also removed
+	needless imports.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/StickyAxisAnnotation.java:
+	  Extracted class implementation CustomAnnotation and renamed to
+	  StickyAxisAnnotation.
+
+2011-08-17  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Improved CustomAnnotations and rendering thereof, now including an
+	"axis mark" (little line at axis), also prepared possibility to put
+	annotations on Y-axis.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Improved CustomAnnotation to include marks on the axis and better spacing
+	  from it.
+
+2011-08-17  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Implemented proof-of-concept collision-detection when drawing
+	CustomAnnotations (text only).
+
+	* src/main/java/de/intevation/flys/exports/ChartExportHelper.java:
+	  Pass a fresh ChartRenderingInfo-Object to createBufferedImage, such that
+	  information can be collected while rendering.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Exploit the fact that XYTextAnnotation already registers drawn shape in the
+	  ChartRenderingInfo if it exists and either an URL or tooltip is set.
+	  Before drawing, calculate own shape and compare against already registered
+	  shapes.
+
+2011-08-16  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Implemented (yet dummy) custom Annotation class.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Added implementation of yet dummy CustomAnnotation class.
+
+2011-08-16  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Slightly improved rendering of annotations.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Slightly improved rendering of annotations. Still no valid collision
+	  detection. Annotations are drawn every 2 km; first come first serve.
+
+2011-08-15  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue191
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java(longestIncreasingWRangeIndices):
+	  Added a method to find the longest index range with increasing w values.
+
+	* src/main/java/de/intevation/flys/exports/ATWriter.java: Export the longest
+	  range of monotone increasing w values instead of the first one.
+	  TODO: The first line of the export is still broken.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java:
+	  Removed superfluous import.
+
+2011-08-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java:
+	  Resolved two TODOs: get Annotations of selected River, get "point"
+	  Annotations only.
+
+2011-08-12  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added functionality to query range and point-annotations only to
+	AnnotationFactory.
+
+	* src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java
+	  (getPointAnnotations, getAnnotationsBreadth):
+	  New functions to query breadth and point-only annotations.
+
+2011-08-11  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java:
+	  Added a development mode for recommendations. Enabled with
+	  stetting system property 'flys.datacage.recommendations.development' to true.
+	  When set the XML template are re-read if the timestamps of the
+	  files have changed so you do not have to restart the server again and again.
+
+	* doc/conf/meta-data-user.xml: Sort collections by creation time in descending order.
+
+2011-08-11  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Rather picky cosmetics only.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java,
+	  src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java,
+	  src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WQKms.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  End comments on a full stop, separate from closing '*/' by whitespace,
+	  adjusted javadoc comments.
+
+2011-08-11  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Made Annotations visible in LongitudinalSection diagrams.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Register new Facet Type, let LongitudinalSectionGenerator include
+	  Annotations in diagram (yet unfiltered and independent of river).
+
+2011-08-11  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* doc/conf/conf.xml,
+	  doc/conf/artifacts/annotation.xml,
+	  doc/conf/meta-data-system.xml:
+	  Added configuration for AnnotationArtifacts.
+
+2011-08-11  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Added demo- implementation of a AnnotationArtifact and its Facet.
+
+	* src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/model/AnnotationFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/states/AnnotationRiverState.java:
+	  New. Initial version of an AnnotationArtifact and its State and Facet.
+
+2011-08-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Extended schema for artifacts and collections
+	  to have creation times, too.
+
+	  To update existing databases:
+
+	    ALTER TABLE artifacts ADD COLUMN creation TIMESTAMP NOT NULL DEFAULT current_timestamp;
+	    ALTER TABLE collections ADD COLUMN creation TIMESTAMP NOT NULL DEFAULT current_timestamp;
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Store creation times for artifacts and collections, too.
+
+	* src/main/resources/datacage-sql/org-h2-driver.properties,
+	  src/main/resources/datacage-sql/org-postgresql-driver.properties:
+	  Adjusted SQL statements.
+
+2011-08-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Make it compilable again (BackendListener interface changed).
+
+2011-08-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data-user.xml: Added grouping element around w/q of each
+	  longitudinal section artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/CompiledStatement.java,
+	  src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java:
+	  Added some debugging capabilities.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/ResultData.java:
+	  Added isEmpty() method.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java:
+	  Now it is possible to nest <dc:elements> into other elements in the <dc:context>
+	  body. This is useful and needed for grouping and repeating results.
+
+2011-08-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java:
+	  User connection was cached, system was not. Lead to incorrect results.
+
+2011-08-09  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data-user.xml: Added <old_calculations> element
+	  around old calculations.
+
+2011-08-09  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java:
+	  Cosmetic: Replaced usage of legacy java.util.Stack with java.util.Deque.
+
+2011-08-04  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data-user.xml: Use 'CAST(x AS uuid)' instead of 'x::uuid'
+	  to be more compatible.
+
+2011-08-04  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java:
+	  If given an artifact place its identifier into parameters passed to template.
+	  Fixed swapped user/system connections if using the user template.
+
+	* doc/conf/meta-data-user.xml: Recommend w/q facet from old calculations
+	  if an artifact was given that represents a longitudinal section
+	  "Laengsschnitt".
+
+	  TODO  I: The template uses PostgreSQL specific UUID casts.
+	  TODO II: We need to find a way only to recommend the master artifacts.
+
+2011-08-04  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java:
+	  Added a <dc:comment> tag to place comments in the meta data templates.
+	  <!-- ... --> comments are copied through.
+
+	* doc/conf/meta-data-user.xml: Added a simple test.
+
+2011-08-04  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Be a bit more tolerant about empty strings for UUIDs of artifact and user.
+
+2011-08-03  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Bring user specific meta data service to life.
+
+	* doc/conf/conf.xml: There are now two templates to configure:
+	  The system template (only the data from the backend) and the
+	  user template (the datcage db and the backend db),
+
+	* doc/conf/meta-data-template.xml: Deleted.
+	* doc/conf/meta-data-user.xml: New. The user specific template. TODO: Write it!
+	* doc/conf/meta-data-system.xml: New. The system template.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/NoneUserSpecific.java:
+	  Deleted.
+	* src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java:
+	  New. The logic to fill the templates.
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java:
+	  Adjusted to follow the new call signatures.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Refactored. Removed the old code and only leave the new service. Following
+	  XPaths are evaluated on the incomming document:
+
+	  "/art:meta/art:artifact-id/@value" The UUID of the artifact. Optional.
+	                                     Used to fill the template enviroment.
+	  "/art:meta/art:user-id/@value"     The UUID of the user. Optional.
+	                                     If given the user specific template is filled.
+	  "/art:meta/art:outs/@value"        The list of outs used to recommend for the
+	                                     various outputs.
+	  "/art:meta/art:parameters/@value"  A list of key/value pairs to inject more
+	                                     filters to the templating.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/App.java:
+	  Change to follow the new recommendations semantics.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java:
+	  Added symbolic constants to distinguish "user" and "system" db connections.
+
+2011-08-03  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* doc/conf/conf.xml:
+	  Cosmetics, let comments start with a capital and end on a full stop,
+	  removed incorrect comment.
+
+2011-08-03  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Cosmetics, let comments start with a capital and end on a full stop.
+
+2011-08-03  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java(extractOutputNames):
+	  Fixed potential NPE.
+
+2011-08-03  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Added support for more than one db connection in datacage templating.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java:
+	  Now you can pass a list of named db connections to the build process.
+	  The purpose is to mix more then one database (e.g. the backend db and
+	  the user specific one).
+
+	  To use this feature you can add an "connection" attribute
+	  to <dc:context> with the name of the connection to use.
+	  If no connection name is given the last used is used again.
+	  Initially the first connection in the given list is used. 
+	  If the context is left the connection that was active before 
+	  will be active again in a stacking manner.
+
+	  When creating NamedConnection objects you can set a boolean flag
+	  if the results coming from the connection should be cached. This
+	  is useful e.g. for the user specific database which runs in-memory
+	  so caching would introduce some superfluous overhead.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/templating/CompiledStatement.java:
+	  When executing the queries explicitly pass if caching should be used.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Forgot to fetch dialect dependent SQL statement for deleting
+	  artifacts by uuid.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Set the name of the collections at initial scan, too.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Fixed wrong SQL references.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Fixed two NPEs.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java,
+	  src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Forwarded kill collections and artifacts events to datacage.
+	
+	* src/main/resources/datacage-sql/org-h2-driver.properties,
+	  src/main/resources/datacage-sql/org-postgresql-driver.properties:
+	  Added statement to delete artifact by uuid.
+
+2011-08-02  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java:
+	  Made it compilable again. The signature of BackendListener has changed.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Completed the backend listener stuff.
+
+	  TODO  I: Added some cleanup for orphaned artifacts.
+	  TODO II: Figure out a way to delete collections/artifacts
+	           which are delete from backend without the 
+			   backend API.
+
+	* src/main/resources/datacage-sql/org-h2-driver.properties,
+	  src/main/resources/datacage-sql/org-postgresql-driver.properties:
+	  Added needed statements.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Update collection names on change. Remove artifacts from collections.
+
+	* src/main/resources/datacage-sql/org-h2-driver.properties,
+	  src/main/resources/datacage-sql/org-postgresql-driver.properties:
+	  Added needed statements.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java:
+	  Call datacage with the global context. This is needed to access the state engine.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java: Changed
+	  signatures to take the global context, too. Create artifacts via backend listener
+	  interface.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java:
+	  Fixed recursion bug.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java:
+	  Added debug output.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/conf.xml: Added backend listener for datacage.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java:
+	  New. Proxies backend listener calls to datacage.
+	 
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Implements backend listener. TODO: Update the datacage database
+	  according the change calls.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta,
+	  src/main/java/de/intevation/flys/artifacts/datacage/templating:
+	  Moved/renamed package to better fit the common semantics.
+	  DataCage.java is now call NoneUserSpecific.java to reflect the
+	  fact that it is the template for the user independent db
+	  analysis.
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java,
+	  src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Ajusted imports and calls.
+
+2011-08-01  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/conf.xml: For documentation purposes added a out-commented 
+	  section with the default configuration of the datacage.
+
+2011-07-31  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Delete the artifacts at before initial scan, too. They are independent
+	  from users. Fixed problem when writing state data content.
+
+	* src/main/resources/datacage-sql/org-h2-driver.properties: Added
+	  statement to delete the artifacts at initial scan, too.
+
+	* src/main/resources/datacage-sql/org-postgresql-driver.properties:
+	  New. PostgreSQL version of the statements. The database scheme
+	  is the same as H2. Very useful for debugging.
+
+2011-07-31  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Added kludge for the types of artifact data. They seem to be null
+	  in some circumstances. Needs to be debugged!
+
+2011-07-31  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DBConfig.java:
+	  Fixed default connection URL to use a namend in-mermory database.
+
+2011-07-31  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Fixed constraint.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Added some debug output.
+
+2011-07-29  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Removed artifact_id from facet because there
+	  is a link via out_id -> outs.id: artifact_id -> artifacts to
+	  find the corresponding artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties: Store
+	  facets of outs into datacage db at initial scan.
+
+2011-07-29  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties:
+	  Store outs of artifacts into datacage db at initial scan.
+	  TODO: store facets.
+
+2011-07-29  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Added 'type' column in artifacts data.
+	  Maybe useful for filtering.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties:
+	  Store artifact data into db at initial scan.
+	  TODO: store outs and facets.
+
+2011-07-29  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties:
+	  Add artifacts into datacage db at initial scan.
+	  TODO: Store data, outs and facets.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Fixed spelling in sequence name.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties: Simply add
+	  collection item at initial scan if artifact was stored before.
+	  TODO: Store new artifacts.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties: Add
+	  collections at initial scan.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties: Add users
+	  at initial scan.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Using sequences for id generation now
+	  to make schema more compatible.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java,
+	  src/main/resources/datacage-sql/org-h2-driver.properties: Clear database
+	  before initial scan.
+
+2011-07-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DBConnection.java:
+	  Deleted. This stuff comes from the artifact database now.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DBConfig.java:
+	  New. The db config of the datacage database.
+
+	* src/main/resources/datacage-sql/org-h2-driver.properties: New.
+	  The SQL statements needed for the datacage.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  Make use of the db config.
+
+2011-07-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java:
+	  New. A artifact database lifetime listener to build the initial
+	  index of the artifacts in database.
+
+	* doc/conf/conf.xml: Added the datacage to the list of lifetime
+	  listeners.
+
+2011-07-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Added an explicit table for the outs
+	  of an artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Make the current outs of an artifact accessible only with
+	  the global context.
+	
+2011-07-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: Added ON DELETE CASCADE constraints.
+	  Added state in facet.
+
+2011-07-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/datacage.sql: New. H2 Schema for the datacage database.
+	  Uses special features like IDENTITY (autoincrement) typed columns.
+
+	* src/main/java/de/intevation/flys/artifacts/datacage/DBConnection.java:
+	  Pooled connection.
+
+	* pom.xml: Added dependencies to H2 and Apache DBCP.
+
+2011-07-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/test/java/de/intevation/flys/artifacts/AppTest.java,
+	  src/main/java/de/intevation/flys/artifacts/App.java: Removed.
+	  This the stupid "Hello, World!" app initially created by the
+	  maven archetype. It was never used.
+
+2011-07-25  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Argh! Usage the DOM was not thread safe (discovered with ab).
+
+2011-07-25  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/meta-data-template.xml: '$recommended' lead to XPath
+	  errors. Using "dc:contains($parameters, 'recommended')" helps.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java,
+	  src/main/java/de/intevation/flys/artifacts/services/meta/FunctionResolver.java:
+	  Added some debugging.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  Added parameters as 'parameters' to parameters. Usefull to check
+	  for containment of variables.
+
+2011-07-25  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Added 'if log.isDebugEnabled() {}'.
+
+2011-07-25  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Made Artifact UUID optional and accept extra parameters, too. This enables
+	  the service to be used without an arttifact and test all filters.
+
+	  <art:meta xmlns:art="http://www.intevation.de/2009/artifacts">
+	     <art:outs value="computed_discharge_curve,floodmap"/>
+	     <art:parameters value="river:Elbe"/>
+	     <art:filters value="recommended"/>
+	  </art:meta>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/FunctionResolver.java:
+	  'contain' accept Maps and collection, too.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  Made artifact option (= null) in recommendations.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/CompiledStatement.java:
+	  Moved connection specific into inner class. The enables the reuse of the
+	  compiled statement.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java: The
+	  SQL statements are now only compiled once at creation time of the builder.
+	  Each connection now reuses them.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/cache.xml: Added configuration for static datacage db access.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/App.java: Using
+	  caches seems to need an explicit System.exit().
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/CompiledStatement.java:
+	  Added support for caching the SQL statements and there results.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java: Some
+	  clean up. Reordered code for performance. Strip SQL statements more
+	  aggressively.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/ResultData.java:
+	  Made it Serializable.
+
+	* src/main/java/de/intevation/flys/artifacts/cache/CacheFactory.java:
+	  Introduced system property 'flys.artifacts.cache.config.file' to make
+	  the caching configurable without pulling up the whole stack.
+
+2011-07-22  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Prepared the FLYSArtifactCollection to support the storage of already
+	  loaded recommendations in its attribute document.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Adjusted to use the DataCage recommendations. The incomming document
+	  can pass the artifacts UUID by '/art:outs/@value' the outs as a
+	  comma separated list in '/art:outs/@value' and optional a set of
+	  filters comma separated in '/art:filters/@value'.
+
+	  If UUID and OUTS are not given the old service is used. This
+	  should be removed as soon as the client uses the new service.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/CompiledStatement.java:
+	  Allow '-' in variable names.
+
+2011-07-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data-template.xml: Now, the river-id is really added to
+	  the factory node of the wmsbackground layer.
+
+2011-07-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data-template.xml: Added the river-id to the factory node
+	  of the riveraxis and wmsbackground layer.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java,
+	  src/main/java/de/intevation/flys/artifacts/services/MainValuesService.java,
+	  src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java,
+	  src/main/java/de/intevation/flys/artifacts/services/RiverService.java:
+	  Adjusted to implement changed Service interface.
+
+2011-07-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Refactored
+	  the method that retrieves the Outputs for the Artifact. Now, we are able
+	  to query the Outputs for the current state, and all outputs separately.
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java: The
+	  recommendations provided by this monitor will take the Outputs of the
+	  current state only into account.
+
+2011-07-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/meta-data-template.xml: Added conditions for each output type.
+	  Splitted the "floodmap" output into two parts: a recommended one and a
+	  complete one. The recommended part will only build the document tree for
+	  the recommended artifacts; the complete part will build the whole document
+	  tree that is available for a floodmap.
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java:
+	  This Hook now uses the DataCage to generate the recommended artifacts.
+	  The output-defaults configurtion is needless now.
+
+	* doc/conf/output-defaults.xml: Removed. The configuration of recommended
+	  artifacts takes place in meta-data-template.xml.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  Bugfix: the DataCage didn't start working if its builder was NOT null,
+	  but it shouldn't start if the builder IS null.
+
+2011-07-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Now it is possible to directly pass a Node as a root to the builder.
+	  The owning document if fetch by Node.getOwnerDocument(). This is
+	  useful if you want to generate the recommendation directly into
+	  an already existing document under a given node.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  Changed the signature of recommend() to accept a node where to
+	  append the recommendations.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Added a macro mechanism:
+
+	    <dc:macro name="keine-fuenf">
+	      <dc:text>'5' ist nicht in der Liste der Outs.</dc:text>
+	    </dc:macro>
+	    <dc:call-macro name="keine-fuenf"/>
+	    <dc:call-macro name="keine-fuenf"/>
+	    <dc:call-macro name="keine-fuenf"/>
+
+	  Macros can be defined everywhere in the template
+	  with 'macro'. There bodies can contain all valid elements
+	  including other 'macro's and 'call-macro's. They are
+	  called with their 'name' with 'call-macro'. The control flow
+	  is continued inside the body of the called macro and 
+	  will continue right after the calling 'call-macro' when
+	  the macro body is finished.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Added a new 'if' construct similiar to XSLT:
+
+	    <dc:if test="not(dc:contains($outs, '5'))">
+	        <dc:text>'5' ist nicht in der Liste der Outs.</dc:text>
+	    </dc:if>
+
+	  The control flow is continued inside the 'if' if the 'test' attribute
+	  as an XPath expression on an empty document evalutes to true.
+	  Else the inside is skipped. There is no 'else'. Use 'choose'/'otherwise'
+	  if you need this.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  Added a recommend() method to generate recommendations for
+	  a given artifact, outs and extra parameters.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added
+	  method to extract all data at once.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/FunctionResolver.java:
+	  New. Custom XPath function provider. Provides
+	  'dc:contains(Object [] haystack, Object needle)' by now. Should be
+	  useful to check containments in 'out' lists later.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Register the FunctionResolver to the evaluated XPaths.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/App.java:
+	  Added code to parse
+	  "param:a,b,c" to "param" -> new String [] { "a", "b", "c" } to
+	  help testing the 'dc:contains' XPath function.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Added wms configurations for Saar, Mosel and Elbe.
+	  Each river supported by FLYS requires such a WMS configuration. A WMS
+	  should contain layers for the river axis, buildings, kilometer labels
+	  and maybe a background layer as well.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java:
+	  Added key that is used to store a map of WMS URLs - for each river a
+	  WMS URL.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  Parse the river WMS from global configuration.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  Create WMSLayerFacets with URLs based on the river and the river wms
+	  configuration stored in the FLYSContext.
+
+	* src/main/java/de/intevation/flys/artifacts/WMSBackgroundArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/RiverAxisArtifact.java:
+	  Adapted the initialize() signature and the method call of computeInit()
+	  which requires a FLYSContext to retrieve the river WMS configurations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added the context object parameter to the computeInit() method.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Call
+	  initialize() with the context object - which is a FLYSContext or a
+	  CallContext.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/App.java:
+	  Check if builder was created properly before using it.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/StackFrames.java:
+	  Implements now variable provider for XPath expressions.
+	
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Added new choose/when/otherwise construct similiar to XSLT
+
+	      <dc:choose>
+	         <dc:when test="$river = 'Mosel'">
+	             <dc:text>Es ist die Mosel.</dc:text>
+	         </dc:when>
+	         <dc:when test="$river = 'Saar'">
+	             <dc:text>Es ist die Saar.</dc:text>
+	         </dc:when>
+	         <dc:otherwise>
+	            <dc:text>Es ist weder Mosel noch Saar.</dc:text>
+	         </dc:otherwise>
+	      </dc:choose>
+
+	  A 'choose' block can contain a list of 'when's and an optional
+	  'otherwise'. For each 'when' the test attribute is evaluated
+	  as an XPath expression on an empty document. The result of
+	  the evaluation is taken as a boolean value. If its value is
+	  true the control flow is continued inside the corresponding
+	  'when' and the other choose elements are not tested.
+	  If the value is values the testing continues with the next
+	  'when'. If no 'test' expression is evaluated to true, the
+	  control flow continues inside the 'otherwise'. If no 'otherwise'
+	  is given nothing happens at all.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Added a config section for floodmaps. Currently, the
+	  background layer's url and layername is defined here.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java:
+	  Read the background layer configuration from conf.xml. Those values are
+	  used to create the WMSLayerFacet.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java:
+	  The background layer facet will no longer have an extent set.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java:
+	  Set the extent of the created WMSLayerFacets and i18n its descriptions.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added I18N strings for the
+	  background an river axis layer.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java:
+	  This facet type has a method to set the extent of a WMS layer. The
+	  extent is written to the facets XML node in toXML() as well.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Adapted
+	  the signature of setup() which requires a CallMeta parameter now.
+
+	* src/main/java/de/intevation/flys/artifacts/WMSBackgroundArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/RiverAxisArtifact.java: Use
+	  the CallMeta object retrieved in setup() to call initialize(). It is now
+	  able to i18n things.
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/App.java: New.
+	  Standalone app to debug the datacage template. To use in a maven environment:
+
+	  -Dmeta.data.template=PATH_TO_META_DATA-TEMPLATE.XML \
+	  -Dmeta.data.parameters=river:Mosel \
+	  -Dmeta.data.output=OUTPUT.XML \
+	  -Dflys.backend.user=DB_USER \
+	  -Dflys.backend.password=DB_PASSWORD \
+	  -Dflys.backend.url=DB_CONNECTION_URL \
+	  -Dexec.mainClass=de.intevation.flys.artifacts.services.meta.App
+
+2011-07-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java:
+	  New. First step to factor out the "Datenkorb" logic into a service independent
+	  singleton.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Uses the "Datenkorb" singleton now.
+
+2011-07-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java:
+	  Removed "index" property, because it is already existing in parent
+	  class.
+
+2011-07-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Improved error handling.
+
+2011-07-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/resources/metadata/template.xml: Deleted.
+
+	* doc/conf/meta-data-template.xml: New. Was template.xml
+
+	* doc/conf/conf.xml: Made meta data template configurable.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Load template from configuration not from resources.
+
+2011-07-19  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/resources/metadata/template.xml: s/[a-z]+-id/db-id/
+	  Make database ids identifiable with unique name "db-id".
+
+2011-07-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java:
+	  Override the toXML() method. Subclasses can now write their own XML
+	  representation.
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedDomFacet.java:
+	  New. This ManagedFacet uses an Element (DOM) to store the information
+	  about a facet. The intent of this facet type is to represent a facet
+	  stored in an Collection attribute. Different facets can have different
+	  attributes that we need to parse, but the only thing ManagedFacets need
+	  to do, is to adjust the attributes "active" and "position". So, those
+	  values are set directly on the Element, the other attributes aren't
+	  touched.
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedFacetAdapter.java:
+	  New. This facet is a wrapper for another facet. This subclass of a
+	  ManagedFacet overrides the toXML() method. The XML representation is
+	  defined by the inner facet that is stored as member variable. The
+	  ManagedFacet specific attributes "artifact", "facet", "pos" and "active"
+	  are added manually.
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java: Uses
+	  the toXML() method to write a facet node into the attribute document.
+
+	* src/main/java/de/intevation/flys/collections/AttributeParser.java: Uses
+	  the ManagedDomFacet to save the information of a facet which is
+	  contained in the attribute part of a Collection's DESCRIBE document.
+
+	* src/main/java/de/intevation/flys/collections/OutputParser.java: Uses the
+	  ManagedFacetAdapter to save a facet, because we want to keep the
+	  specific facet to be able to write its specific XML representation into
+	  the Collection's DESCRIBE document.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adapted the XPath of facets stored in the attribute part of the
+	  DESCRIBE.
+
+2011-07-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  method that returns the Outputs for the Artifact.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adapeted the call of OutputParser.
+
+	* src/main/java/de/intevation/flys/collections/OutputParser.java:
+	  Simplified the code to read the Outputs of Artifacts. This parser will
+	  now longer parse the DESCRIBE documents of the Artifacts, but query the
+	  Outputs via FLYSArtifact.getOutputs() directly.
+
+2011-07-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/StaticFLYSArtifact.java:
+	  Adapted the function call of ProtocolUtils.appendOutputModes().
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java:
+	  Override toXML() to add the URL and layernames to the XML representation
+	  of this facet.
+
+2011-07-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/wmsbackground.xml,
+	  doc/conf/artifacts/riveraxis.xml: New configurations for an Artifact
+	  that is used as background layer in floodmaps, and an artifact that is
+	  used as layer showing the river axis in a floodmap.
+
+	* doc/conf/output-defaults.xml: New file to configure default artifacts
+	  for specific output states. E.g. the floodmap state recommends a
+	  background layer and a layer displaying the river axis. In suche case,
+	  the floodmap state recommends two artifacts for the two layers.
+
+	* doc/conf/conf.xml: Added new artifacts/artifact-factories and a Hook to
+	  monitor artifacts (-> CollectionMonitor.java).
+
+	* src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java:
+	  New. This facet is used to represent a layer in a map. So, this facet
+	  stores information about a WMS URL and the layer names provided by this
+	  WMS.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: Added
+	  facet types for the wmsbackground and riveraxis.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java,
+	  src/main/java/de/intevation/flys/artifacts/WMSBackgroundArtifact.java:
+	  New. An artifact and its default state. The intent of these classes is
+	  to generate WMSLayerFacets which represent background layers in maps.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java,
+	  src/main/java/de/intevation/flys/artifacts/RiverAxisArtifact.java: New.
+	  An artifact and its default state. The intent of these classes is to
+	  generate WMSLayerFacets which represent layers that display a river
+	  axis.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added the INIT ComputeType.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  case for the INIT ComputeType while computing data.
+
+2011-07-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added a method computeInit() which is called to initialize data/facets
+	  after an artifact has been created.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Repaired
+	  broken XPath.
+
+2011-07-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java:
+	  Removed the code to generate new artifacts. Instead of creating new
+	  artifacts automatically, we decided to suggest creating new artifacts
+	  from specific types. Therefore, the DESCRIBE document of the artifacts
+	  is extended with a node that contains recommended artifact types.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  FLYSArtifacts might be setup with the identifier of an other
+	  FLYSArtifact. Subclasses are able to override a method called
+	  initialize(Artifact, GlobalContext). This might be helpful to extract
+	  required values or clone artifacts.
+
+2011-07-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  Adapted the signature of createArtifactContext() - it returns an
+	  instance of GlobalContext now.
+
+2011-07-14  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/geom/Lines.java:
+	  Debugged the water fill algorithm. Added a lot of logging.
+
+	* src/main/java/de/intevation/flys/artifacts/charts/CrossSectionApp.java:
+	  Added a text field to give a water level to fill in.
+
+2011-07-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Moved code
+	  to create the output modes based on the given facets to FLYSArtifact. In
+	  addition, FLYSArtifact got a new method that returns a specific input
+	  value as string.
+
+	* src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java: New.
+	  This hook monitors the "post-feed" and "post-advance". If the monitored
+	  Artifact's state has configured recommended artifacts, this hook will
+	  create new Artifacts.
+
+	  TODO: We have to add the UUIDs of the new Artifacts to the DESCRIBE
+	  document of the artifact to let the client know, that there are new
+	  recommended Artifacts.
+
+	* src/main/java/de/intevation/flys/artifacts/StaticFLYSArtifact.java: New.
+	  This Artifact is the base class for Artifacts, that represent static
+	  data. E.g. this could be a decoration theme in a chart or a background
+	  layer in the map.
+
+	* src/main/java/de/intevation/flys/artifacts/states/OutputState.java: New.
+	  This state might be used as base class for states, that doesn't require
+	  any user input, but only provide static Facets added by a computeFeed()
+	  operation. So, subclasses need to implement computeFeed() only.
+
+2011-07-13  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/charts/CrossSectionApp.java:
+	  New. Standalone Swing-App to test cross sections from database without the
+	  hassles of our complete software stack. Runnable from a maven environment:
+
+	  $ mvn -e \
+	    -Dflys.backend.user=DB_USER \
+		-Dflys.backend.password=DB_PASSWD \
+		-Dflys.backend.url=DB_CONNECTION_URL \
+		-Dexec.mainClass=de.intevation.flys.artifacts.charts.CrossSectionApp \
+		exec:java
+
+	  You can set the river to be used with the system property 'river'.
+	  Defaults to 'Mosel'.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENFacet.java:
+	  Removed superfluous imports.
+
+2011-07-13  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: The FloodMapState has a new Outputmode
+	  called "floodmap" now.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WSPLGENFacet.java: New.
+	  This facet is used to generate WSPLGEN results.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: Added
+	  the WSPLGENFacet.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java:
+	  This state will now generate WSPLGENFacets.
+
+2011-07-12  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/geom/Lines.java:
+	  Fixed corner case.
+
+2011-07-11  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/geom/Lines.java: New.
+	  fillWater() generates a list of wet lines for a given profile and a
+	  given water level.
+
+2011-07-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: The
+	  Outputs created while generating the DESCRIBE document will now have the
+	  'type' member set.
+
+	* src/main/java/de/intevation/flys/collections/OutputParser.java: Read the
+	  'type' member from DESCRIBE document.
+
+2011-07-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Removed a typo.
+
+2011-07-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java:
+	  DataFacet are now able to store the ID of the state which has created
+	  this Facet.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Initialize DataFacets with the ID of this state. This is necessary to
+	  renew the waterlevel data if it is no longer existing in the cache.
+
+2011-07-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java: A
+	  report facet can now store the state's id and the artifact's hash value
+	  when it has been created.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Initialize the ReportFacet and WaterlevelFacet with state id and hash
+	  information. This has been necessary to retrieve reports and waterlevels
+	  in states after this one - in states that we need to enter for floodmap
+	  parameterization.
+
+2011-07-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelGroundDifferences.java:
+	  Changed the desired UI provider.
+
+2011-07-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added the option to continue the
+	  waterlevel parameterization with the intent to create flood maps.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  This state is no longer a final state. The user has the option to
+	  continue with the parameterization for flood maps based on the current
+	  waterlevel. Therefore, this states desires the "continue" UI provider.
+	  Clients should recognice this to just step to the next state or display
+	  a button that lets the user step to the next state manually.
+
+	* src/main/java/de/intevation/flys/artifacts/states/FloodplainChoice.java,
+	  src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ProfileDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelGroundDifferences.java:
+	  New. These states are used to parameterize a further calculation type:
+	  flood map.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Required strings for the
+	  flood maps states.
+
+2011-07-04  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix(?) for flys/issue114
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java:
+	  Make guessing a bit more robust.
+
+2011-07-03  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Added the math needed to calculate "W-Differenzen" in "Laengsschnitten".
+	Needs testing!
+
+	* src/main/java/de/intevation/flys/artifacts/model/NamedObject.java:
+	  Made it an interface to be usable in more than one inheritance chain.
+
+	* src/main/java/de/intevation/flys/artifacts/model/NamedObjectImpl.java:
+	  Implements the NamedObject interface and is the new base class of
+	  WQ and WKmsImpl.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WKms.java:
+	  New. Interface to associate kms with ws.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java:
+	  Changed the base class to NamedObjectImpl. Renamed getKms(int)
+	  to getKm(int) to make clear it return a single scalar value
+	  and fullfil the WKms interface.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WKmsImpl.java:
+	  New. Implements the WKms interface. Intended to be a lightweight
+	  datastore for "zusaetzliche Laengsschnitte" and as results
+	  of the WKmsOperations.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java:
+	  Changed base class to NamedObjectImpl.
+
+	* src/main/java/de/intevation/flys/artifacts/math/WKmsOperation.java:
+	  New. Operations on WKms data.
+	  Currently only the SUBTRACTION operation is implemented. This
+	  one is needed to calculate the "W-Differenzen". The operation
+	  is insensitive about the km directions of the datasets. Missing
+	  values are interpolated linear.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Adjusted to satisfy the signature change of WQKMs.
+
+2011-07-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/StyledXYSeries.java: New. This
+	  XYSeries stores the style information that should be used to render this
+	  series. These information are stored as raw XML documents. A public
+	  method can be used to apply those style information to a
+	  XYLineAndShapeRenderer.
+
+	  Note: The only two attributes currently supported by StyledXYSeries
+	  items are "linesize" and "linecolor".
+
+	* doc/conf/themes.xml: Added some more basic themes for the four
+	  calculation methods.
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: This
+	  generator now tries to apply themes for all series contained in the
+	  chart. If a series is no instance of StyledXYSeries, the default
+	  renderer is used.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Removed the code that had been introduced to adapt renderers statically.
+	  Now, each of these concrete ChartGenerators instantiates StyledXYSeries
+	  items to put the curves into the chart. Those items contain style
+	  information now!
+
+2011-07-01  Ingo Weinzierl <ingo@intevation.de>
+
+	flys/issue135 (Diagramm: Trotz abgeschalteter Themen bleiben Beschriftungen bestehen)
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: The way
+	  to store datasets has changed. Until this revision, the concrete
+	  generators managed their own datasets. E.g. the
+	  DischargeLongitudinalSectionGenerator had three datasets: w, q and
+	  corrected w. Now, there are just two datasets, managed by this base
+	  generator - one dataset for the first Y axis and one dataset for the
+	  second Y axis. This makes it easier to remove axes, that have no data to
+	  be displayed. All concrete chart generators have to add their XYSeries
+	  using two methods: addFirstAxisSeries() and addSecondAxisSeries().
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Those concrete chart generators no longer manage datasets themself but
+	  they use the two methods described above, to plot the data to the first
+	  or second Y axis.
+
+2011-07-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java:
+	  Added the option to use a filter to reduce the number of items returned
+	  by this service.
+
+2011-06-30  Ingo Weinzierl <ingo@intevation.de>
+
+	flys/issue159 (WINFO: Radiobutton - Ortsauswahl bei "W für ungleichwertigen Abflusslängsschnitt" entfernen)
+
+	* doc/conf/artifacts/winfo.xml: Changed the kilometer range input for
+	  calculation 4. This calculation type requires a kilometer range. So,
+	  after choosing the calculation 4, the transition model leads to a state
+	  that just allows the input of a kilometer range with no option to
+	  enter locations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputationRangeState.java:
+	  New. A base state for the kilometer selection for calculations. The
+	  target of this state is to provide facets for the duration curves.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DistanceSelect.java:
+	  New. This state is used to enter a kilometer range. The difference to
+	  the LocationDistanceSelect state is, that there is no option to enter
+	  locations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RangeState.java:
+	  Improved this state to be the base state for calculation ranges.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java: This
+	  state no longer inherits from RangeState which now is used as base
+	  state for kilometer ranges.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added new i18n strings for
+	  the DistanceSelect state.
+
+2011-06-28  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* pom.xml: Downgraded Trove to 1.1-beta-5, because the new
+	  later ones are removed from the maven repos.
+
+	  The functionality we need is in 1.1 so this downgrade should
+	  cause no problems.
+
+	  Would be nice if we would support the maintainers of trove to 
+	  bring there new versions back into the main maven repos.
+
+2011-06-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* pom.xml: Repaired the JBoss repository which place has changed.
+
+2011-06-28  Ingo Weinzierl <ingo@intevation.de>
+
+	Tagged RELEASE 2.4
+
+2011-06-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/WstWriter.java:
+	  Append the corrected W column (if existing) to the WST export.
+
+2011-06-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java:
+	  Guessing increaing w is not based on direct neighbors any more.
+	  The second to be compared with is choosen by random of
+	  the values before the first one. This makes the guessing
+	  more robust against 'plateaus' of equal w values.
+
+2011-06-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ATWriter.java: Array
+	  for constructing the spline was too large leading to non-increasing
+	  values.
+
+2011-06-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue150
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Invert the x axis if its guessed that water is increasing.
+
+2011-06-27  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java(guessWaterIncreasing):
+	  Added a method to guess based on a given factor of the size (default 0.05)
+	  if the water levels are increasing. Needed to determine in which direction
+	  the water level curve should be orientated. Based on random to avoid
+	  running over large dataset each time a diagram is generated.
+
+2011-06-27  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue177 (WINFO: Abflusskurven am Pegel verursachen ein Hängen des Servers)
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Commented out code to generate time ranges for series names. There
+	  seems to be a problem while loading the discharge tables of a gauge or
+	  while determining the start and/or end time of such discharge tables.
+
+2011-06-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/**/*.java: Removed trailing whitespace.
+
+2011-06-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Removed dead code.
+
+2011-06-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue173
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  Fixed the way the gauge was found for a given interval.
+	  The old way does not work because it was just tested if
+	  the station point was inside the segments which is not
+	  necessarily true. The obvious solution to simply check
+	  the overlapping intervals does not work either because
+	  the gauge ranges touch each other and so more than
+	  one gauge are returned in these cases. The River.maxOverlap()
+	  is now used to find the gauge with the max overlapping
+	  range.
+
+2011-06-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue147
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation1.java:
+	  Removed the 'kmUp' flag. It was an left over from former
+	  WSP calculations (w/o ref km) leading to wrong results now.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Don't pass the kmUp flag to the calculation.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Added debug output to see the value of 'wq_free'.
+
+2011-06-26  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue86
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  The reference gauge for calculations "am Pegel" was determined
+	  wrong.
+	  
+2011-06-25  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Conversion w->q was broken. This should fix a number of issues
+	  around "W am Pegel" calculations.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Issue an error report if a w->q conversion fails.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  The gauge to convert w->q with its discharge table was determined wrong.
+
+2011-06-24  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue174 (Diagramm: Q-Linie wird bei initialem Laden des Diagramms
+	  anders dargestellt als bei Ansicht auf gesamten Wertebereich)
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  The chart will now have upper margins again.
+
+2011-06-24  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue172 (Diagramm: Ursprung der Diagramme bei Dauerzahlen)
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  Charts of this type will have the lower X value set to "0".
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ATWriter.java:
+	  Results are now in cm. Made it more robust against corner cases.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Removed superfluous import.
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml, doc/conf/conf.xml:
+	  Added facet config for AT exports.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Added 'at' facet type.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java:
+	  Generate AT facets.
+	
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ATExporter.java: New.
+	  Exporter for AT facets. Needs testing.
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ATWriter.java: New.
+	  Writer for AT files. New code because our data model differs
+	  from Desktop-FLYS. Needs testing.
+
+2011-06-23  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue157 (Diagramm: Ursprung berechnete Abflusskurve)
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Moved the method that adjusts the X-axis to include the "0" value from
+	  ComputedDischargeCurveGenerator to DischargeCurveGenerator. Now, both
+	  charts will include the "0" on the X-axis.
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQDay.java:
+	  Based on WQ now to make it exportable as AT.
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQ.java:
+	  New. Base class for WQKms.
+
+	  TODO 1: make it a base class for WQDay, too,
+	  TODO 2: Generate instances of WQ instead of WQKms in "Abflusskurven"
+	          calculations. This will save memory.
+
+	  AT exporter will get instances of this class as data model
+
+	* src/main/java/de/intevation/flys/artifacts/model/NamedObject.java:
+	  Add default constructor to ease inheritance.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java:
+	  Based on WQ now. Removed code allready defined in base class.
+
+2011-06-23  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Add TODOs for error reports
+	  of "Abflusskurven am Pegel". Maybe we don't need them?
+
+	* doc/conf/conf.xml: Configure report for each calculated output type.
+
+2011-06-22  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue164 (Berechnung 4: Umgekehrtes Berechnungsintervall führt zur)
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Create the items with range information for W and Q which allows the
+	  client to validate the user inserted values.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Arguments in filling datastructure were flip. Now
+	  the "Abflusskurve am Pegel" looks correct again.
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Removed superfluous imports.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Improved situtation on rendering "Abflusskurve am Pegel". Not
+	fully working, yet.
+
+	* doc/conf/artifacts/winfo.xml: Generate facets for the location path, too.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: Misspelled
+	  the facet which prevented the facets from being to the outputs.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java:
+	  Extended to store the hash and the state id of the producing artifact/state
+	  else it results in NPEs because the data is calculated on later (wrong) states.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Store the state id and the hash in the facet, too.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Add two
+	  method to do calculations for a state the artifact is currently not in
+	  and fetching the current state id.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Generate facets for "Abflusskurven am Pegel"
+	  Not working by now. :-/
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java: New facet type
+	  for "Abflusskurven am Pegel"
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Do calculation
+	  in the artifact not in the output generator.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Generate the new facets.
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Fetch data from facet.
+
+2011-06-22  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue161 (Diagramm: Q-Achse in W-Längsschnitten immer bei Q=0)
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  The Q axis (which is the second y axis) initially contains the 0 value.
+	  After a zoom action has taken place, this behaviour is no longer
+	  supported.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Draw correction curve again.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java:
+	  Use correction curve to map plot to axes. Not doing so prevented
+	  the correction curve from being drawn!
+	  Smaller code cleanups and simplifications.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WQCKms.java:
+	  Added methods to directly access the components w, q and c
+	  at a given index.
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java:
+	  Attribute access via DOM instead of XPath.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Code simplification.
+
+2011-06-21  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue157 (Diagramm: Ursprung berechnete Abflusskurve)
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Splitted
+	  up zooming for x and y axes to be able to override specific axis
+	  zoom behaviour.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  The lower bound of the x axis (which is the Q axis in such chart) is
+	  always 0.
+
+2011-06-21  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue90 (Diagramm: Trennung derDiagrammfläche und Achsenaufheben)
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Added a margin between chart data and chart axes.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue158
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java:
+	  Checks for right class now.
+	
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Fix for flys/issue154
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java:
+	  Checks for right class now.
+
+2011-06-21  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Only generate 'outs' if they have facets.
+
+	* src/main/java/de/intevation/flys/exports/ChartExportHelper.java:
+	  'boolean ? true : false' <=> 'boolean'
+
+2011-06-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Added the time-to-live to the DESCRIBE document.
+
+2011-06-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Configured states to generate report facets.
+
+2011-06-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java:
+	  Return the report.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java:
+	  Generate report facets if there are problems with the calculations.
+	  TODO: Adjust winfo.xml to configure the facets.
+
+2011-06-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ReportGenerator.java:
+	  New. Generator for calculation reports.
+
+	* doc/conf/conf.xml: Added ReportGenerator.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  Added type 'report'.
+
+	* src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java:
+	  Specialized facet for serving reports. TODO: Added them to the
+	  calculation states.
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation.java:
+	  Looped through CallMeta for i18n purposes. TODO: do i18n
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Removed superfluous import.
+
+	* src/main/java/de/intevation/flys/exports/AbstractExporter.java:
+	  Added some override annotations.
+
+2011-06-20  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/CalculationResult.java:
+	  New. Used to transport the data and the error report.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation1.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation2.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation3.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation4.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DurationCurveFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation.java,
+	  src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java,
+	  src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java:
+	  Use the CalculationResult now.
+
+2011-06-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation1.java:
+	  Allow an explicit reference km to enable calculation "am Pegel".
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  If a calculation "am Pegel" is done, take start km of the
+	  calculation range and find the gauge in which range it is located.
+	  Take the station of the gauge as the reference km. If no gauge
+	  is found the calcualtion falls back to calculation "auf freier Strecke".
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Replaced another inefficient attribute extraction via XPath
+	  with direct DOM access.
+
+2011-06-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java,
+	  src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Removed dead code.
+
+2011-06-18  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java
+	  src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DurationCurveFacet.java,
+	  src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Only generate facets when needed.
+
+	* src/main/java/de/intevation/flys/collections/OutputParser.java:
+	  Removed more XPath for simply accessing attributes of an element.
+
+	* doc/conf/cache.xml: 200 elements in memory for "computed.values" are enough,
+	  LRU as eviction strategy is sufficent.
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java,
+	  src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Use
+	  more 'standard' Java naming conventions.
+
+2011-06-17  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Merged in the facet-slt branch to bring in the 'facet' feature.
+
+	* doc/conf/artifacts/winfo.xml: Fixed some facets.
+
+	* doc/conf/cache.xml: Added a "computed.values" cache to store the
+	  results of the WINFO calculations.
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java:
+	  Add support for index per facet to make them unique and identifiable.
+
+	* src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java:
+	  New. Inteface to be used to access the facet names of the configuration.
+
+	* src/main/java/de/intevation/flys/artifacts/model/DataFacet.java: New.
+	  A facet to be used to have raw access to the computed data of an artifact.
+	  Useful to export things like CSV and WST.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java: New.
+	  Specialized facet to access the water level data stored in WQKms arrays.
+
+	* src/main/java/de/intevation/flys/artifacts/model/DurationCurveFacet.java: New.
+	  Specialized facet to access the duration data stored in WQDay data structures.
+	  
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Facets are
+	  now generated dynamically from the current available ones stored with
+	  the artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java: Added
+	  methods computeAdvance() and computeFeed() called if artifact is fed or
+	  adance. This overwritten in subclasses to do the state depending calculations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java: These
+	  states overwrites the computeAdvance() and computeFeed() methods to do
+	  the corresponding WINFO calculations.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Calls 
+	  computeAdvance() and computeFeed() if artifact is fed or advanced. Centralized
+	  the caching mechanism.
+
+	* src/main/java/de/intevation/flys/exports/AbstractExporter.java,
+	  src/main/java/de/intevation/flys/collections/AttributeParser.java,
+	  src/main/java/de/intevation/flys/collections/OutputParser.java,
+	  src/main/java/de/intevation/flys/collections/AttributeWriter.java,
+	  src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adjusted the code to cope with the indices of the facets. Used
+	  DOM to access the attributes instead of XPath. Removed smaller bugs
+	  concerning position generation.
+
+	* src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ChartGenerator.java,
+	  src/main/java/de/intevation/flys/exports/OutGenerator.java:
+	  Forwarded facet references.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/WaterlevelExporter.java:
+	  Uses facets to fetch data and generate output now.
+
+2011-06-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added a new parameter "wq_free" that
+	  determines the mode of calculation 1. If it is "false" (default),
+	  the calculation should be bound to a gauge.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  method to retrieve the information about the "wq_free" parameter.
+
+2011-06-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added a facet for corrected W in
+	  computation 4.
+
+2011-06-14  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java:
+	  Got rid of namespace in result document.
+
+2011-06-14  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue77 (Diagramm: Beschriftung der Kurven bei Dauerlinien)
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  Give the curves in the chart names.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added titles for duration
+	  chart curves.
+
+2011-06-14  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java:
+	  Write top 'Oberkante' and bottom 'Unterkante' to out going XML
+	  if they exist.
+
+2011-06-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Write the min/max W/Q ranges as art:range elements into the DESCRIBE.
+
+2011-06-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java:
+	  This state that is used to retrieve locations will now write the
+	  kilometer range of the selected river into the DESCRIBE document.
+
+2011-06-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation1.java:
+	  New. Factored out version of "Wasserspiegellage" calculation.
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java:
+
+	  Removed some dead code.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQCKms.java:
+	  Added Override annotation and used quick access method.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Looped through error reporting use by interpolate.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Used factored out version of calculation 1. Removed dead code.
+
+2011-06-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation2.java:
+	  New. Factored out version of "Abflusskurve".
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Loop errors through w/q at km interpolation.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use factored out version of calculation 2.
+
+2011-06-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation3.java:
+	  New. Factored out version of "Dauerzahlen".
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Loop errors through for q->w interpolations.
+	  
+	* src/main/java/de/intevation/flys/artifacts/model/WQDay.java:
+	  Added constructor to directly create with calculated results.
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation.java:
+	  Added method to return the number of problems.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use factored out version of calculation 3.
+
+2011-06-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WQCKms.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WQDay.java:
+	  Added methods to remove NaN values.
+
+2011-06-10  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation.java:
+	  New. Base class for calculations. Used to collect problems occuring
+	  during calculation.
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  Extends Calculation now. Looped through the problem reports to
+	  base class.
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+	  Looped through the problem reports.
+
+2011-06-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java:
+	  Append the min/max range and a transformation matrix for each axis.
+
+	* src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java:
+	  Instantiate the InfoGeneratorHelper with a XYChartGenerator instance.
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Changed the zoom operation. The zoom values defined in the chart request
+	  document are no longer absolute values for a specific axis. Those values
+	  represent percental values for the start and end point of x and y axes.
+	  E.g. a chart has three axes with the following ranges:
+	    - x axis  :  0 - 10
+	    - y axis 1: 20 - 40
+	    - y axis 2: 40 - 90
+	    - zoom values for x: 0.1 - 0.9 (10% - 90%)
+	    - zoom values for y: 0.2 - 0.8 (20% - 80%)
+	  The produced chart will have the following ranges:
+	    - x axis  :  1 - 9
+		- y axis 1: 24 - 36
+		  y axis 2: 50 - 80
+
+2011-06-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  Map datasets to axes correctly.
+
+2011-06-08  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  Determine the gauges by their station positions. This hopfully
+	  fixes the problem with wrong assigned gauges and invalid segments.
+
+2011-06-08  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Segment.java,
+	  src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  Added more debug output.
+
+2011-06-08  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue103 PART 1 (WINFO: Wasserspiegellagenberechnung / Layout-Inkonsistenz)
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Selected values are formatted with the current locale. The static part
+	  of the DESCRIBE document will now contain i18n formatted numbers.
+
+2011-06-08  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue93 (WINFO: Benennung der Berechnungsart korrigieren)
+
+	* src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_de.properties: Changed the name of
+	  calculation 4.
+
+2011-06-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Made the range determination more robust against NaN values.
+
+2011-06-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  The second y axis is set to position "1". It was set to "2" before, but
+	  in that case, there was no position "1".
+
+2011-06-08  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  s@m³/s@m\\u00b3/s@
+
+2011-06-08  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java:
+	  Only generate an axis element if a axis really exists.
+
+2011-06-07  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+	  Simpified array swapping.
+
+2011-06-07  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Use java.util.List instead of java.util.Vector
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Removed superfluous imports.
+
+2011-06-07  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  createItem() is not abstract any longer to avoid code repetitionin sub classes.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Removed duplicated code, inserted default constructors and Override annotations.
+
+2011-06-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java:
+	  Append axes range information to the info document.
+
+2011-06-07  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  If feed() fails do not store invalid values in database.
+
+2011-06-06  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java:
+	  Removed asymmetrical "- 1" from width calculation.
+
+2011-06-05  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  Fixed problem when more than one value per segment are given.
+
+2011-06-05  Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+	Refactored version of "Berechnung 4"
+
+	* src/main/java/de/intevation/flys/artifacts/model/Segment.java:
+	  Added instance fields for a reference point (= location of gauge)
+	  and backup of values (needed for naming).
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQCKms.java:
+	  Added a constructor to be created from a WQKms. This is helpful
+	  if a WQKms is replaced by a back jump correction.
+
+	* src/main/java/de/intevation/flys/artifacts/model/Calculation4.java:
+	  New. Outfactored version of "W bei ungleichmaessigen Abflusslaengsschnitt".
+	  Much cleaner now and it should have a better handling of the corner
+	  cases.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Removed the linear interpolation stuff. It is now in Linear. Removed
+	  the LinearRemap interpolation method because it is not needed any
+	  longer. Added a method to interpolate a given km with a given
+	  function.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Removed the old calc 4 and used the new one.
+
+	* src/main/java/de/intevation/flys/artifacts/math/LinearRemap.java:
+	  Deleted. Not needed any longer.
+
+	* src/main/java/de/intevation/flys/artifacts/math/Function.java:
+	  New. Interface for a uni-variate real function.
+
+	* src/main/java/de/intevation/flys/artifacts/math/Identity.java:
+	  New. Implements Function with f(x) = x
+
+	* src/main/java/de/intevation/flys/artifacts/math/Linear.java:
+	  New. Implements Function with f(x) = m*x + b
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Factored some stuff out to DoubleUtil. Removed some dead code.
+	  Does some rounding correct.
+
+	* src/main/java/de/intevation/flys/utils/DoubleUtil.java: New.
+	  Centralized utils surrounding common double operations.
+
+	* src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java:
+	  Removed superfluous imports.
+
+2011-06-03  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue90(Diagramm: Trennung der Diagrammfläche und Achsen aufheben)
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Determine the ranges of x and y axes. If no zoom ranges are given, we
+	  will determine the min and max xy values in the dataset manually,
+	  because JFreeCharts adds a margin to the left and right of the data
+	  area automatically..
+
+2011-06-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Moved
+	  the chart creation into an own public method. This lets the
+	  ChartInfoGenerator create charts without duplicating code.
+
+	* src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java:
+	  Limited the possible class for generators to XYChartGenerator. This
+	  enables the ChartInfoGenerator class to do the whole chart creation
+	  stuff itself without outsourcing the code to concrete subclasses.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveInfoGenerator.java:
+	  Removed the code to generate charts - this is done in ChartInfoGenerator
+	  now.
+
+2011-06-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java: Added new
+	  methods to extract the x and y ranges from request document.
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Added a
+	  method that zooms the chart to the specified x and y ranges.
+
+2011-06-02	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* doc/conf/conf.xml: Set collection ttl to 6 hours.
+
+2011-06-01	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/Segment.java:
+	  New. Parse segments only once.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Expose new parser to artifacts. TODO: Use it.
+
+2011-06-01	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Changed interpolation methods to interpolate to an arbitrary position
+	  in a given double result array as a preparation for segment independent
+	  calculation.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Removed superfluous import.
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+	  Fixed cause for crashing: Run back too far in some siutations.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Refactored range code a bit. Needs more work.
+
+2011-06-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java:
+	  Interchange the lower and upper x value of the chart if the x-axis is
+	  inverted before the matrix values are computed. Now, the matrix is able
+	  to work with charts that have an inverted x-axis.
+
+2011-06-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java: New. A
+	  chart info generator generates a document that contains meta information
+	  for a specific chart. Concrete instances of this abstract class need to
+	  instantiate concrete ChartGenerators and dispatch nearly all methods of
+	  an OutGenerator (init(), doOut(), setMaster()) to this instance. The
+	  generate() method is implemented in the ChartInfoGenerator itself. It
+	  creates a chart with help of the ChartGenerator instance and builds a
+	  document that contains meta information of this chart.
+
+	* src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java: New.
+	  This helper is used to create the chart info document. At the moment,
+	  the only information that is included in this document is a
+	  transformation matrix to transform image coordinates into chart
+	  coordinates.
+
+	  NOTE: The transformation matrix creation needs some work to support
+	  charts with inverted X axis.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveInfoGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveInfoGenerator.java:
+	  Concrete instances of ChartInfoGenerator that create the chart info for
+	  the currently supported chart types.
+
+	* doc/conf/conf.xml: Registered new OutGenerators.
+
+2011-05-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Added support for the 'type' paramter of the collection's out()
+	  operation.
+
+2011-05-31	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Use an explicit reference km for interpolation now.
+
+2011-05-30	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* doc/conf/cache.xml: Introduced cache to store the distance info per river.
+	  This boosts performance in following ab setup from  3.61 to 39.91 requests/secs.
+
+	  $ ab -c 20 -n 1000 -p distances.xml http://127.0.0.1:8181/service/distanceinfo
+
+	  $ cat distances.xml
+	    <?xml version="1.0" encoding="UTF-8"?>
+	    <art:river xmlns:art="http://www.intevation.de/2009/artifacts">Elbe</art:river>
+
+	* src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java: Added
+	  an iterator result to avoid construction expensive interim lists.
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java: Use
+	  the cache if configured.
+
+2011-05-30	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	flys/issue82
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Only successful interpolations are named.
+
+2011-05-27	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+	  Make it work independent of river flow direction.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Fixed bug in ordering segments
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Re-enabled
+	  calculation of the back jump correction. Fixed more flow direction issues.
+	  
+2011-05-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Removed call of XMLDebug class which is not in the version control.
+
+2011-05-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Moved the code part that skips themes right after the part that sets the
+	  master artifact for the OutGenerator. We need this master artifact to
+	  display empty charts - master artifact is used to create titles and
+	  axes.
+
+2011-05-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Deactivated themes are not put into the chart.
+
+2011-05-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/AttributeParser.java:
+	  Repaired broken XPath expressions to find the output modes in an
+	  attribute document of a collection.
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java: This
+	  writer will now create a document that has a root node art:attribute.
+	  Before these changes, the document's root node was art:outputs which is
+	  part of the attribute document but not the right root node.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adapted some XPath expressions and corrected the the process to create
+	  attribute documents.
+
+2011-05-26	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/LinearRemap.java:
+	  Made it work independent of from/to order.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Added method to extract the ranges correctly from data.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use the correct ranges. Comment out backjump detection temporarily.
+
+2011-05-26	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Generate fields for w/q input depend on flow direction.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Moved km up question out of loop.
+2011-05-26	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Take the flow direction into account.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Prevent NPE.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RangeState.java:
+	  Allow to be 'from' greater than 'to' in ranges.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Negate
+	  step if 'from' is greater than 'to'.
+
+2011-05-26	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Round exploded values to a precision of 1e-6.
+
+2011-05-25	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	Qs are now stored in ranges for each column.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory2.java:
+	  Deleted.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java:
+	  Was WstValueTableFactory2.
+
+	* src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java: Fixed
+	  node linking bug. Removed dead code.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Q values are now stored in range trees by each column. The qs of the rows
+	  are removed and the calculations are adjusted. Removed dead code.
+
+2011-05-24	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java:
+	  Moved cache name to WstValueTableCacheKey. Do not cache null references.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableCacheKey.java:
+	  Moved cache name into this class.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Store QRangeTree for each column of value table. TODO: Use them!
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory2.java:
+	  Intended as a replacement for WstValueTableFactory, but is work in progress.
+
+	* src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java: Fixed
+	  index errors and added methods to dump as graphviz graph.
+
+2011-05-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java:
+	  Improved the validation of WQ values.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Use the
+	  correct input data object to determine the selected WQ mode (range or
+	  single input).
+
+2011-05-24  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-40 (part I/II)
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Write default values (values already selected by the user before) of the
+	  input data items into DESCRIBE.
+
+2011-05-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Removed needless imports.
+
+2011-05-24  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-85 (part III/III)
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Added a static function that returns the kilometer values (double[])
+	  from locations input (whitespace separated double values).
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Adapted
+	  the getKms() method. It will now return a computed array of kilometers
+	  if we had inserted a range, or it will return the inserted kilometers if
+	  we had inserted locations.
+
+2011-05-24	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java:
+	  Moved cache key to separate class.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableCacheKey.java:
+	  New. The new cache key class.
+
+2011-05-24	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java:
+	  Model to store the q values of a WST column efficiently. First
+	  building block not to store the q values directly aside the
+	  w values.
+
+2011-05-24  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-85 (part I/III)
+
+	* doc/conf/artifacts/winfo.xml: Added two further field 'ld_mode' and
+	  'ld_locations' to the range/locations state to track the selected mode
+	  and locations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Added methods to validate the user inserted locations.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  method to determine of a range or locations have been inserted.
+
+2011-05-23  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-62 (part II/II)
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Dump the
+	  artifacts state/data in DEBUG mode in describe().
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  States will no longer store data. The only reason for states storing
+	  StateData is to know about the necessary data for this state. If a State
+	  needs to access the user input for a specific StateData object, it needs
+	  to query the FLYSArtifact which stores the data.
+
+2011-05-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  method to dump the artifacts state(s)/data.
+
+2011-05-23	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	flys/issue84
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstFactory.java:
+	  Forget to select wst kind.
+	  
+2011-05-20	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	flys/issue81
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  weights for kms were swapped. 
+
+2011-05-20  Ingo Weinzierl <ingo@intevation.de>
+
+	Tagged RELEASE 2.3.1
+
+2011-05-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* Changes: Prepared changes for the upcoming release.
+
+2011-05-20  Hans Plum <hans@intevation.de>
+
+	* NEWS:
+	Hint to Release 2.3.1. For further information look into module
+	flys-client/NEWS
+
+2011-05-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java (getExplodedValues):
+	  Increment kms array size by one to take the end of range, too.
+
+2011-05-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java:
+	  Sort by rows (should not be necessary).
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Use unsharp km lookup (epsilon = 0.0001). This fixes the problem
+	  that some kms were not found.
+
+2011-05-19  Ingo Weinzierl <ingo@intevation.de>
+
+	  flys/issue66
+
+	* src/main/resources/messages_en.properties: Fixed broken template.
+
+2011-05-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Set the name of the computed discharge curve objects.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  The curves of this chart will now have names that consist of the word
+	  'Discharge Curve', the river name and the kilometer that has been used
+	  for the computation.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n strings for the
+	  computed discharge curves.
+
+2011-05-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Added convenience method isQ() to determine if we are
+	  doing Q calculations.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Reintroduced titles for the "W for unausgeglichene Abfluesse".
+
+2011-05-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  The curves will now have names that consist of the gauge name and its
+	  valid time range.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n strings for the
+	  discharge curves.
+
+2011-05-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Removed dead code.
+
+2011-05-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use the correct method to generate kms.
+
+	* src/main/java/de/intevation/flys/artifacts/math/LinearRemap.java:
+	  Added some logging to test the map in debug mode.
+
+2011-05-18	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Made getExplodedValues static.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use new logic to calculate "W für ungleichwertige Abfluesse".
+	  Not working, yet.
+
+	* ChangeLog: Fixed former entry.
+
+2011-05-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Registered the WST export for discharge
+	  longitudinal sections.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Set the
+	  names of the discharge longitudinal section computation results.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java:
+	  The W/Q curves in the chart will now have names.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java:
+	  The WstWriter is filled with column names in an own method. So, we are
+	  able to override this process in subclasses.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java:
+	  Adapted the column names for the WST export.
+
+2011-05-18	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	Work on flys/issue69
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use new logic to calculate "Wasserstand/Wasserspiegellage".
+	  Compared to desktop FLYS are the results are structurally right 
+	  but a bit off in the positions after the decimal points.
+	  Maybe a result of the interpolation? Need to debug this.
+
+2011-05-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  W and Q curves will now have names based on the defined W or Q values
+	  for the waterlevel computation.
+
+2011-05-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/NamedObject.java:
+	  New. This object is used to give objects a name.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java: Inherit
+	  from NamedObject now. Because we need to display names for those objects
+	  in different places.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: The WQKms
+	  objects returned by a waterlevel computation will now have names.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java:
+	  Insert the column names for the WSTs into the WstWriter.
+
+	* src/main/java/de/intevation/flys/exports/WstWriter.java: The column
+	  names are written into the head of the WSTs now.
+
+2011-05-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstLine.java: New. This
+	  class is used to store the W/Q values of a specific kilometer of a WST.
+
+	* src/main/java/de/intevation/flys/exports/WstWriter.java: New. A writer
+	  that creates WSTs.
+
+	  TODO: The header of the WSTs is not finished. The Q descriptions are
+	  missing.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java:
+	  Enabled WST exports.
+
+	* doc/conf/artifacts/winfo.xml: Registered the WST export for waterlevels.
+
+2011-05-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/utils/Formatter.java: New. This class
+	  supports functions to retrieve formatters for specific types of data
+	  used in FLYS.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/AbstractExporter.java:
+	  Removed the formatter declaration - the whole formatter stuff is done in
+	  Formatter now.
+
+2011-05-17  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-72
+
+	* src/main/java/de/intevation/flys/artifacts/services/MainValuesService.java:
+	  Repaired broken XPath expressions to extract start and end kilometer.
+
+2011-05-17	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Removed the Hibernate loading stuff.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java:
+	  New. The Hibernate loading.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Use the WstValueTableFactory for loading now.
+
+2011-05-17  Ingo Weinzierl <ingo@intevation.de>
+
+	Tagged RELEASE 0.1 aka Version 2.3.0
+
+2011-05-16  Hans Plum <hans@intevation.de>
+
+	* NEWS:
+	New. Giving some user specific perspective to new functionality and
+	changes. This file references releases dates only; details can be find
+	in the client module at flys-client.
+
+2011-05-10	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	First step to calculate "W fuer ungleichwertige Abfluesse" correctly.
+	flys/issue55
+
+	* src/main/java/de/intevation/flys/artifacts/math/LinearRemap.java:
+	  New. Remaps "gleichwertige" Q values to the corresponding
+	  "ungleichwertige" Q values depending on km.
+	  
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Remap the Q values "ungleichwertig" depending on the 
+	  "gleichwertige" ones.
+
+2011-05-10	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	First step to fix flys/issue69
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  New code path to implement the calculation of "Wasserstand/Wasspiegellage"
+	  correctly. TODO 1: Use new path in UI. TODO 2: Remove unused old code.
+
+2011-05-13  Ingo Weinzierl <ingo@intevation.de>
+
+	* Changes: Prepared Changes for the upcoming release 2.3 - see Changes
+	  file to get to know about the changes of the version numbers.
+
+2011-05-13  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-37
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java: This
+	  state would be happy if there is a UI provider called "river_panel".
+
+2011-05-11  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java: Added new
+	  methods that return the requested chart size as integer array [width,
+	  height]. The requested size is read from the incomding request document.
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: The size
+	  of a chart is no longer static. The requested size is fetched using
+	  ChartGenerator.getSize().
+
+2011-05-11  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-52
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  The X-Axis of such a chart is inverted, if the head of the river is not
+	  at kilometer 0. This type of charts always have the head of the river at
+	  the left side.
+
+2011-05-10	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Make incoming XML symmetric to DistanceInfoService.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-47
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Adjusted temporarily the color of the W, Q and corrected W curves to
+	  distinguish each other.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java:
+	  Adjusted the plot of xy charts - the gridlines are displayed now.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	  ISSUE-53
+
+	* src/main/java/de/intevation/flys/artifacts/resources/Resources.java:
+	  Added a method that returns the preferred locale based on the available
+	  locales of the server and the desired locales of the request (CallMeta).
+
+	* src/main/java/de/intevation/flys/exports/AbstractExporter.java: Added a
+	  method that creates a number formatter with minimum and maximum digits.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java,
+	  src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java:
+	  Formatted the number values of the CSV exports.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/RangeWithValues.java:
+	  New. A data structure that enables us to save a data triple: a range
+	  that consist of lower and upper double value and a set of values that
+	  belong to this range.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Implemented the validation of W/Q values.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/AbstractExporter.java: New
+	  method to retrieve i18n messages based on keys.
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java,
+	  src/main/java/de/intevation/flys/exports/WaterlevelExporter.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveExporter.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java:
+	  Added headers for CSV exports.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added new i18n strings for
+	  CSV headers.
+
+2011-05-10	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Fetches river name from incoming XML document. If no river is given all 
+	  infos about all rivers are listed.
+
+	* src/main/resources/metadata/template.xml: Templates honors the 'river'
+	  parameter.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Extended to pass parameters to the templating. Added support for
+	  type conversion.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/StackFrames.java:
+	  Take parameters as an initial stack frame.
+	  
+	* src/main/java/de/intevation/flys/artifacts/services/meta/TypeConverter.java:
+	  New. Converts types off stacked variables.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Added a
+	  method to add subtitles to charts. The implementation in this class does
+	  not add any subtitle. Concrete subclasses may override this method to
+	  add some.
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Add subtitles to charts.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n templates for
+	  compound messages (chart subtitles).
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/resources/Resources.java:
+	  Added new methods to retrieve translated compound messages.
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/OutGenerator.java: Added a
+	  method to set the master artifact that should be used for some special
+	  operations.
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java,
+	  src/main/java/de/intevation/flys/exports/AbstractExporter.java:
+	  Implement the setMasterArtifact() method of the interface.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Call OutGenerator.setMasterArtifact().
+
+	  NOTE: The determination of the master artifact needs to be implemented!
+
+2011-05-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Removed
+	  hard coded dev code that defined a WQ mode.
+
+2011-05-09	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  Stripped ugly extra whitespace from output introduced by
+	  templating.
+
+2011-05-09	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/resources/metadata/template.xml: Added forgotten
+	  columns of fixation WSTs.
+
+2011-05-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java: Added a
+	  method to retrieve i18n strings.
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Enabled i18n support for chart title and axes labels.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n strings for the
+	  chart types above.
+
+2011-05-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java:
+	  New. This OutGenerator exports the data of a discharge longitudinal
+	  section computation.
+
+	* doc/conf/conf.xml: Added the DischargeLongitudinalSectionExporter.
+
+	* doc/conf/artifacts/winfo.xml: Added the exporter with CSV facet to the
+	  discharge_longitudinal_section state.
+
+2011-05-07	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+	  Added code to make back jump correction work with both
+	  potential flow directions.
+
+2011-05-06	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/resources/metadata/template.xml:
+	  Added data cage configuration for 'Längsschnitt'.
+
+2011-05-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added the missing Q facet for discharge
+	  longitudinal sections.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQCKms.java: New. A
+	  derived dataset to store W/Q values with corrected Ws for a kilometer
+	  range.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java: Some new
+	  methods and a new constructor to initialize this data object with a
+	  predefined set of values.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: New
+	  methods to retrieve the W/Q values for the 'discharge longitudinal
+	  section' computation.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: New
+	  methods to retrieve and compute data used for the 'discharge
+	  longitudinal section' computation.
+
+2011-05-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java:
+	  Bugfix: just write the ranges of gauges into the DESCRIBE if the
+	  'wq_values' data item is required.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n messages used in
+	  the DESCRIBE of the WQAdapted state.
+
+2011-05-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Changed the title of the y-axis (now 'W [NN+m]').
+
+2011-05-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Improved the transition model to reach the
+	  output state for creating 'discharge longitudinal section' charts.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a
+	  method that returns all gauges of the selected river based on a the
+	  given kilometer range.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java: New.
+	  This state creates a set of elements for the DESCRIBE that consist of a
+	  tuple of kilometer values. The number of elements depend on the number
+	  of gauges intersected by the given kilometer range.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java:
+	  New. This state is the output state that is reached after the 'discharge
+	  longitudinal section' computation has been chosen.
+
+2011-05-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Default
+	  step width between two kilometers added - if no step width is given,
+	  this default width is used.
+
+2011-05-05  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Fixed a potential NullPointerException if there is just a single
+	  kilometer given to create a longitudinal section.
+
+2011-05-04	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* pom.xml: Added http://repository.jboss.org/maven2 repo
+	  to fix flys/issue30
+
+2011-05-04	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  To make diagram generation possible ws are now generated from qs
+	  because they are many ws having different qs.
+
+2011-05-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java:
+	  Fetch the WQ data from WINFO artifact and write those values into the
+	  CSV export.
+
+2011-05-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Added
+	  methods to compute and retrieve the data for discharge curves (computed).
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  Fetch the computed discharge curve data from WINFOArtifact and add the
+	  values into the JFreeChart dataset.
+
+2011-05-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added new transitions and states to enable
+	  the WINFO artifact for computing discharge curves.
+
+	* doc/conf/conf.xml: Added OutGenerators that generate computed discharge
+	  curves and exports for its data.
+
+	* src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java:
+	  New. This state is reached if the user chose the computed discharge
+	  curve.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java:
+	  New. This is only a stub implementation at the moment. This
+	  OutGenerator should create computed discharge curves later. It extends
+	  the DischargeCurveGenerator which should do the same stuff for discharge
+	  curves for gauges.
+
+	* src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java:
+	  New. This is only a stub implementation at the moment. This OutGenerator
+	  should create the exports of the discharge curve computation.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added a new output mode for the duration
+	  curve state (CSV export).
+
+	* doc/conf/conf.xml: Added a new OutGenerator to export duration curve
+	  computations.
+
+	* src/main/java/de/intevation/flys/exports/AbstractExporter.java: New.
+	  This abstract OutGenerator represents the base class for exporting
+	  computed data. Currently, the CSV export is supported.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java: Moved
+	  the most code to export to CSV into the AbstractExporter.
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveExporter.java:
+	  New. This exporter exports the computed data of a duration computation.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Modified a wrong debug statement which would confuse the user.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added a new output mode for the waterlevel
+	  state (CSV export).
+
+	* doc/conf/conf.xml: Added a new OutGenerator to export waterlevels.
+
+	* src/main/java/de/intevation/flys/exports/WaterlevelExporter.java: New.
+	  This OutGenerator exports the data of a waterlevel computation. Note:
+	  It is necessary to specify the desired facet (e.g.
+	  'waterlevel_export.csv').
+
+	* pom.xml: Added a dependency to OpenCSV.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Introduced an "export" output target. If the target is "export", a
+	  facet (read from the incoming xml document) is a necessary parameter
+	  that determines which facets are written to the output.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages_en.properties: Bugfix: replaced german
+	  string (copy & paste mistake).
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added new i18n strings for
+	  for the location selection.
+
+2011-05-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  New. An OutGenerator for creating duration curves.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQDay.java: New. A
+	  model class to store necessary data for creating W and Q facets of a
+	  duration curve. This model stores W, Q and Days.
+
+	* src/main/java/de/intevation/flys/artifacts/model/MainValuesFactory.java:
+	  Added a function to retrieve tuples of (day, q) based on a given gauge -
+	  these tuples are necessary for creating duration curves.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Added
+	  methods to compute and retrieve the data necessary for creating duration
+	  curves.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java:
+	  Bugfix: improved the access to the location array (avoid
+	  NullPointerException).
+
+	* doc/conf/conf.xml: Registered the new OutGenerator for duration curves.
+
+2011-05-03	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* contrib/visualize-transitions.xsl: State quoting was done wrong.
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Enhanced the transition model to reach the
+	  final state for creating duration curves.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java:
+	  New. This state should be reached to just insert an array of locations.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java:
+	  New. This state is reached if the duration curve calculation is
+	  selected.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Adjusted
+	  getDistance() so that it takes care on inserted locations - not just
+	  inserted ranges.
+
+2011-05-02	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/cache/CacheFactory.java:
+	  Flush/persist caches at program exists.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Commented out too eloquent debug output.
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Uses the methods of FLYSArtifact to retrieve the necessary information
+	  rivername and selected distance.
+
+2011-05-02	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Added interpolateW method to take reference to result ws array
+	  as an argument to avoid expensive array allocations in km iterating
+	  loops.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java:
+	  Added a constructor to create backing trove datastructure
+	  with the right capacity.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Move allocation of result ws out of km loop.
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added two further data items in the WQ
+	  selection state. Those items are necessary to store the information
+	  about the selected mode (range/single selection) and  the values of the
+	  single selection.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java: If
+	  there is no value for a data item, this item is not written into the
+	  static DESCRIBE part.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RangeState.java,
+	  src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Renamed the method to validate upper and lower values.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java: This
+	  state can now handle values inserted in the single selection. Therefore,
+	  new validate methods has been added.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: The
+	  methods getWs() and getWs() take care on the values inserted in the
+	  single insert mode of the client which enables the user to insert single
+	  W and Q.
+
+2011-05-02	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Repaired getQForW() by calculating indices on right dimension.
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: New
+	  methods for retrieving selected W values (getWs()).
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: The
+	  method for retrieving waterlevel data takes care on selected Ws, now.
+	  The selected Ws are transformed using the DischargeTables.getQForW()
+	  into Q values.
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Removed an unused parameter 'result' of getQForW().
+
+2011-05-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Removed
+	  the getDataset() method and replaced it with a addDataset() method.
+	  On this way, concrete subclasses of this OutGenerator can have multiple
+	  datasets (e.g. different datasets for W and Q). This abstract method is
+	  called after the chart generation is finished.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Both classes implement the addDataset() method. The
+	  LongitudinalSectionGenerator has already multiple datasets for W and Q.
+	  Both are added to the chart - both have an own range axis.
+
+2011-05-01	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Use the cache for the wst value table if configured.
+
+	* doc/conf/cache.xml: Choose a more precise name for the 
+	  wst value table cache.
+
+2011-04-29	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* pom.xml: Added dependency to Ehcache. Apache 2.0 license.
+
+	* doc/conf/conf.xml: Added configuration of ehcache.
+
+	* doc/conf/cache.xml: New. Cache configurations.
+
+	* src/main/java/de/intevation/flys/artifacts/cache/CacheFactory.java:
+	  New. Factory to access caches.
+
+2011-04-29	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Forgot to add.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java:
+	  New. Given a database connection and a XML template it generates
+	  an output with meta data about the database.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/CompiledStatement.java:
+	  New. Holds prepared statements optimized to be run in the stack of
+	  contextes.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/StackFrames.java:
+	  New. Model to hold a hierarchical scope of variables.
+
+	* src/main/java/de/intevation/flys/artifacts/services/meta/ResultData.java:
+	  New. Stores data set fetched from a sql select to be iterated in
+	  a context.
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java,
+	  src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Removed superfluous imports.
+
+2011-04-29	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* doc/conf/conf.xml: Added meta data service.
+
+	* src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java:
+	  Stub for the meta data service.
+
+	* src/main/resources/metadata/template.xml: Initial template for
+	  the meta data service.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Bugfix: Now, curves for Q values are drawn into a longitudinal section
+	  chart as well. Therefore, it was necessary to change the datastructure
+	  of the inner class ThemeList that stores all themes included in a chart
+	  in an ordered list (stored in a java.util.Vector now).
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: New. An
+	  abstract base class for ChartGenerators that create XY charts.
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Sourced the generate() method out to the XYChartGenerator.
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Implemented the methods to add W and Q facets to the chart.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Improved
+	  the calculation of the step with for ranges.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java: Added a
+	  method that returns the number of elements stored in the data pool.
+
+2011-04-29	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java:
+	  Added a get() method which takes destination array as an
+	  argument.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java: Changed the
+	  data structure to store w, q and kms values from List<Double> to
+	  TDoubleArrayList which stores native double values instead of big
+	  Double values.
+
+	* pom.xml: Added the GNU Trove dependency.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/OutGenerator.java: Added the
+	  name a the requested facet to doOut(). Concrete generators should just
+	  create output for this facet now.
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java,
+	  src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  Adapted the method signature of doOut().
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adapted the method call of OutGenerator.doOut().
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/themes.xml: Added mappings for the facets
+	  longitudinal.section.w and longitudinal.section.q.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added some
+	  methods to retrieve necessary information for computing the data of a
+	  waterlevel.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Added
+	  methods to compute and retrieve the data of a waterlevel computation.
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WQKms.java: New. This
+	  model class represents a pool of data triples that consist of W, Q and
+	  Kms information. This class might be used to compute data for creating
+	  longitudinal section curves (which are based on those W, Q and Kms
+	  values).
+
+2011-04-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Bugfix: Removed endless loop and a bug while iterating over Hibernate
+	  results.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  New. An OutGenerator that creates longitudinal section curves.
+
+	  NOTE: This is just the stub - the out creation needs to be implemented!
+
+	* doc/conf/conf.xml: Added the LongitudinalSectionGenerator.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Bugfix: Added missing <output-generators> section.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WaterlevelState.java: New.
+	  This state should be reached if the 'calc.surface.curve' calculation
+	  method has been chosen.
+
+	* doc/conf/artifacts/winfo.xml: Modified a transition and added the
+	  WaterlevelState. This state is reached if the 'calc.surface.curve'
+	  calculation method has been chosen. It currently has 1 output - a
+	  longitudinal section that is not implemented yet!
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/ValueCompareTransition.java:
+	  New. This transition is valid if the a data object of the current
+	  artifact equals/notequals a configured value in the transition model.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Bugfixes:
+	  - Adapted the parameters of the isStateReachable() call - added the
+	    artifact and the current state.
+	  - Append the outputs of a current state if the state is filled with
+	    valid data.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/DefaultTransition.java:
+	  Added the missing init() method that has been introduced in the
+	  interface some commits ealier.
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/TransitionFactory.java:
+	  Call init() after a Transition has been created.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java:
+	  Bugfix: Introduced a <art:outputs> node in the attribute document of a
+	  Collection that contains further <art:output> nodes - instead of having
+	  multiple <art:output> nodes at toplevel of the document.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Adapted the XPath to retrieve the outputs in the attribute document of a
+	  Collection.
+
+2011-04-28	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* contrib/visualize-transitions.xsl: Added to create a 
+	  Graphviz digraph out of the config.xml. Usage:
+
+	  $ xsltproc --stringparam base-dir ../doc/conf/ \
+	    contrib/visualize-transitions.xsl \
+	    doc/conf/conf.xml > transitions.dot
+
+	  $ dot -Tsvg -o transitions.svg transitions.dot
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java:
+	  If no data has been inserted so far, an IllegalArgumentException is
+	  thrown.
+
+2011-04-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java::
+	  A lot of new methods to retrieve the theme of a facet - used while
+	  creating the output of a facet/artifact. If a facet has no theme yet, it
+	  is initialized.
+
+2011-04-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/AttributeParser.java,
+	  src/main/java/de/intevation/flys/collections/OutputParser.java: Removed
+	  useless imports.
+
+2011-04-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java: New. An
+	  abstract OutGenerator that might be used to create chart output. Some
+	  basic things that are equal in all charts should be done here!
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  This OutGenerator no longer implements the OutGenerator directly, but it
+	  extends the ChartGenerator now.
+
+2011-04-27  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Restructured the out() operation of a collection: Now, we collect a list
+	  of artifacts/facets and use this for the OutGenerator. Its doOut()
+	  method gets the attribute of an artifact - the position and the active
+	  state is managed by the Collection itself.
+
+2011-04-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java: New.
+	  a specialized facet that stores information about its position and its
+	  state (active/inactive) in an output of a collection.
+
+	* src/main/java/de/intevation/flys/collections/AttributeParser.java: New.
+	  This parser takes the attributes (XML) of a collection and extracts the
+	  contained outputs with its facets. The result is a Map<String, Output>.
+
+	* src/main/java/de/intevation/flys/collections/OutputParser.java: New.
+	  This parser is used to query the artifact's DESCRIBE and to extract the
+	  supported outputs. The result is a Map<String, Output>.
+
+	* src/main/java/de/intevation/flys/collections/AttributeWriter.java: New.
+	  This writer merges the outputs contained in an attribute of a collection
+	  with the outputs of a collection's artifacts.
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  The attributes of a collection are written into its DESCRIBE document
+	  now. The OutputParser and AttributeParser are used to read the supported
+	  attributes by the collection and its artifacts - the AttributeWriter is
+	  used to merge both attributes and create a final attribute document.
+
+2011-04-26  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java,
+	  src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  The facet-2-theme mappings are initialized at startup and stored in the
+	  FLYSContext.
+
+	* src/main/java/de/intevation/flys/themes/ThemeFactory.java: Added a
+	  function that retrieves a theme from FLYSContext based on its name.
+
+2011-04-22	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Corrected a silly c&p mistake.
+
+2011-04-22	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+
+	  Implementation of the "Ruecksprungkorrektur" to be done in
+	  "W fuer angepassten Abflusslaengschnitt".
+
+	  All tests show the expected results. In some corner cases the
+	  algorithm described in the "Anwenderhandbuch" chapter 3.3.4.3 "Korrektur"
+	  has some definition shortcomings:
+
+	  a - What should happend when you cannot find point 2 because
+	      you cannot step back one quarter from point 3 because there
+	      is no data there any more (river too short in this direction)?
+	      The implemented algorithm raises point 3' only to an
+	      according factor. E.g. If you can step back the whole quarter
+	      distance the elevation is the full quarter. If you can
+	      step back only the half of the quarter the elevation is
+	      only an eighth.
+
+	  b - If the water heights between point 2 and 3 are constant then
+	      the algorithm will produce a spline interpolation that
+	      lowers those values. Is this intended?
+
+	  For real data the back jumps are expected to be more in the middle
+	  of the distance ranges so the corner cases are maybe not so
+	  important.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Removed superfluous import.
+
+2011-04-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/themes/ThemeFactory.java: Removed debug
+	  code that has been commited by accident.
+
+2011-04-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/themes.xml: New. A first small theme configuration.
+
+	* doc/conf/conf.xml: Added a link to the theme configuration.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java:
+	  Defined a key that is used to store a themes map in the FLYSContext.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  The theme configuration is read at startup and the themes are stores in
+	  the FLYSContext.
+
+2011-04-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/themes/Theme.java,
+	  src/main/java/de/intevation/flys/themes/DefaultTheme.java:
+	  New. The interface and its default implementation that represents themes
+	  used to style charts and maps.
+
+	* src/main/java/de/intevation/flys/themes/ThemeField.java,
+	  src/main/java/de/intevation/flys/themes/DefaultThemeField.java:
+	  New. The interface and its default implementation that represents fields
+	  in themes. A theme might be "Lines" and one of its field might be
+	  "Color" or "Size".
+
+	* src/main/java/de/intevation/flys/themes/ThemeFactory.java: A factory
+	  that creates new themes based on a theme configuration.
+
+2011-04-20	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Implementation of "Abflusskurve/Abflusstafel" calculation.
+
+	  Added method interpolateWQ() which takes an km and results in a
+	  tuple of two double arrays containing the w/q values interpolated
+	  between the surrounding w/q values of the table.
+	  w values are interpolated linear, q values with a cubic spline.
+
+	  Drawing w over q gives you the discharge table at the given km.
+
+	  !!! This code needs testing !!!
+
+2011-04-20	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* pom.xml: Added dependency to Apache Commons Math 2.2 (Apache License 2.0)
+
+2011-04-20	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Fix problem when sorting by q (copied w instead of q).
+
+2011-04-20  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Fixed broken HQL statement.
+
+2011-04-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  add a method interpolateW() which takes an array of
+	  q values and returns an equal sized array of w values.
+	  This is essentially the "Wasserstand/Wasserspiegellagen" calculation
+	  of desktop FLYS.
+
+	  If you want to do a calculation with given w values you have
+	  to convert the w values with DischargeTables.getQForW() first.
+
+	  !!! This code needs heavy testing !!!
+
+2011-04-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  We need a getQForW() method and not getWForQ() because when
+	  doing a "Wasserstand/Wasserspiegellagen" calculation with given
+	  w values these values need to be translated to q values with
+	  the master discharge table.
+
+2011-04-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Sorting of q values was done wrong.
+
+2011-04-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java:
+	  Ordered the list of annotations returned by this factory based on its
+	  range.
+
+2011-04-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/MainValuesService.java:
+	  New. This service returns an XML document that includes the main values
+	  of a gauge based on a river name, a start and an end point.
+
+	* doc/conf/conf.xml: Registered the MainValuesService.
+
+2011-04-19  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/MainValuesFactory.java:
+	  A factory that provides methods to return MainValues.
+
+2011-04-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Added static method getWForQ() to interpolate a w value for
+	  a given q value based on a given discharge table.
+	
+2011-04-19	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Added convenience constructors/methods to ease the access to the master
+	  discharge table of a gauge.
+
+2011-04-18	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Moved the query complexity into view 'wst_value_table' and
+	  used this instead.
+
+2011-04-18	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java:
+	  Fetches w/q value tables from the backend. TODO: Move this
+	  to the backend and use a view.
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Changed
+	  the error key that is thrown if no input data was found so that the key
+	  is usable for GWT's i18n mechanism.
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  The inserted river is validated now (overrides validate() of
+	  DefaultState).
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  The inserted calculation method is validated now (overrides validate()
+	  of DefaultState).
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  The input data of feed() are validated using the DefaultStates
+	  validate() method.
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  New method validate() that needs to be overidden by concrete subclasses.
+	  It should return true, if the data of the State is fine, otherwise it
+	  should raise an exception.
+
+	  NOTE: The exceptions are not translated in the server but in the client!
+
+	* src/main/java/de/intevation/flys/artifacts/states/RangeState.java: New.
+	  This abstract class exists to provide some methods for handling ranges.
+	  Currently, there is a method that validates a given range based on
+	  min/max values.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java:
+	  Implemented input data validation for ranges.
+
+	  NOTE: The input validation of concrete values has not been implemented
+	  yet!
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Removed debug code that has been commited by accident :-/
+
+2011-04-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: The
+	  getGauge() method returns the first gauge based on the given start and
+	  end point of the river.
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java:
+	  Fixed potential bugs: if no gauge could be determined, the default
+	  values for W and Q are the minimum and maximum double values.
+
+2011-04-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java: Fills
+	  the DESCRIBE with default values for W and Q.
+
+2011-04-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/WstFactory.java:
+	  New. Returns Wst object - based on a river.
+
+2011-04-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Now
+	  provides some methods that return some basic objects inserted while
+	  parameterization: River, Gauge and so on.
+
+2011-04-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java,
+	  src/main/java/de/intevation/flys/artifacts/services/RiverService.java:
+	  Bugfix: Repaired broken imports of the SessionHolder.
+
+2011-04-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/SessionHolder.java:
+	  Moved this class to flys-backend.
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/GaugesFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java,
+	  src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java:
+	  Adapted imports of the SessionHolder.
+
+2011-04-14	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* trunk/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java,
+	  trunk/src/main/java/de/intevation/flys/artifacts/services/RiverService.java:
+	  Acquire/release sessions in services to avoid db connection leaks.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Changed some method signatures - added a reference to the owner
+	  Artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/WQSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Modified method signatures based on the changes in DefaultState.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  Added default values to the dynamic part of DESCRIBE.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java:
+	  Added a function that returns a River object based on a given river
+	  name.
+
+2011-04-14	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/GaugesFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java,
+	  src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java:
+	  Static methods are using the SessionHolder, too.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java:
+	  Added the setup() method that has been added to the interface
+	  description in the last commits.
+
+	* doc/conf/conf.xml: Registered the SessionCallContextListener as
+	  CallContext.Listener.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/SessionHolder.java:
+	  Bugfix: Call correct method to retrieve an instance of
+	  SessionFactoryProvider.
+
+2011-04-14	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/SessionHolder.java:
+	  New. Contains thread local session holder for hibernate sessions.
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java:
+	  Uses session from SessionHolder.
+
+	* src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java:
+	  Interacts with SessionHolder now.
+	
+	* src/main/java/de/intevation/flys/exports/ChartExportHelper.java:
+	  Removed superfluous import.
+	
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java:
+	  Implementation of a CallContext.Listener to open/close Hibernate
+	  Sessions for each request.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Some modifications related to the last commit - modification of the
+	  describe() signature of a State.
+
+2011-04-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/GaugeSelect.java:
+	  Removed. We do not need a state to select a gauge - the selection takes
+	  place by choosing a start and an end point.
+
+2011-04-13  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Bugfix: added missing label node to root node and a namespace to the
+	  data node.
+
+2011-04-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  The name of the artifact 'winfo' is written into the DESCRIBE document
+	  now. We need this to have a proper way to distinguish between different
+	  artifacts in the UI.
+
+2011-04-12  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Bugfix:
+	  States are filled with data before they describe themself.
+
+2011-04-11  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java:
+	  New. A factory that returns the annotations of a specific river.
+
+	* src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java:
+	  New. This service provides a document that contains information about
+	  distances of a river.
+
+	* doc/conf/conf.xml: Registered the DistanceInfoService.
+
+2011-04-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  This collection overrides the out() operation now. The incoming request
+	  document is read and the related OutGenerator is used to create the
+	  output.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Removed
+	  the code to create discharge curves. It has moved to the
+	  DischargeCurveGenerator which now does this work.
+
+2011-04-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/OutGenerator.java: The
+	  generate() method throws an IOException now.
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java:
+	  New. This OutGenerator creates discharge curves.
+
+2011-04-06  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Changed
+	  the visibility of the getData() method. It's now public, because the
+	  OutGenerator needs an artifact's data.
+
+2011-04-03	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/**/*.java: Removed trailing whitespace.
+
+2011-04-03	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Make project compilable again by
+	  commenting out a not existing XMLDebug reference.
+
+2011-03-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  Added code to parse the configured OutGenerators and to save them (in a
+	  map) in the FLYSContext.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java:
+	  Added a key that is used to save the OutGenerators Map in the context.
+
+2011-03-31  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/OutGenerator.java:
+	  New. This interface is used to generator different types of output.
+	  ArtifactCollections will make use of this interface to create a
+	  collected output of all its artifacts.
+
+2011-03-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Removed the Backend from FLYSArtifactCollection - used ArtifactDatabase
+	  operations instead.
+
+	* TODO: Removed 'remove Backend reference' TODO.
+
+2011-03-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Enhanced the configuration of the
+	  discharge curve output mode. This output now provides three facets - W,
+	  Q and the curve itself.
+
+2011-03-30  Ingo Weinzierl <ingo@intevation.de>
+
+	Tagged RELEASE 0.1
+
+2011-03-30  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Renamed an output mode in the WINFO
+	  artifact configuration.
+
+2011-03-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_de.properties: Changed a german string.
+
+2011-03-29  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Modified the available calculation modes and its order in the DESCRIBE
+	  document.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_de_DE.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Adapted the names of
+	  calculation modes.
+
+2011-03-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Added the hash code of an artifact to the artifact part of the
+	  collection's DESCRIBE document.
+
+2011-03-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Changed
+	  the background color of discharge curves to white.
+
+2011-03-28	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Cache the scale, too. Otherwise two calls to getValues() with
+	  different arguments will result in the same output.
+
+2011-03-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Introduced a 'scale' parameter in the getValues() method.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Filled
+	  the out() operation with code that draws a discharge table of one or
+	  more gauges specified by the given range in entered in a previous state.
+
+2011-03-28  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartExportHelper.java:
+	  New. A helper class to exports charts.
+
+	* pom.xml: Added dependencies to iText, Batik and JFreeChart.
+
+2011-03-28	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/importer/PegelGltParser.java:
+	  Fixed swap of operands.
+
+2011-03-28	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/GaugesFactory.java:
+	  New. Load gauges for a river and filter them for given
+	  ranges.
+
+2011-03-25	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  Store data in a double [][] instead of interleaved double []
+	  to be compatible with org.jfree.data.xy.DefaultXYDataset.
+
+2011-03-25  Ingo Weinzierl <ingo@intevation.de>
+
+	* TODO: Removed 'i18n' and 'step-back' TODOs and added an issue to remove
+	  the Backend reference from FLYSArtifactCollection.
+
+2011-03-25  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  Added missing artifact namespace of an attribute in the DESCRIBE
+	  document.
+
+2011-03-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java:
+	  New. This ArtifactCollection overrides the DefaultArtifactCollection to
+	  implement FLYS specific describe() and out() operations.
+
+	* doc/conf/conf.xml: Use the FLYSArtifactCollection instead of the
+	  DefaultArtifactCollection for this application.
+
+2011-03-24	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java:
+	  New. Fetches values of discharge tables in form of packed
+	  w/q double arrays for given gauges.
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java:
+	  Removed needless import.
+
+2011-03-24  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages_de_DE.properties: Added a german resource
+	  bundle to avoid exceptions in the flys artifacts. Sometimes, the
+	  Resources class is not able to find a 'de_DE' bundle and throws an
+	  exception. This is really strange, because it should use the 'de' bundle
+	  in that case, but it doesn't.
+
+2011-03-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Added
+	  some code to append the output modes of previous states to the DESCRIBE
+	  document.
+
+	  TODO: Determine if the current state is already filled with data and
+	  append its output modes as well!
+
+2011-03-22  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Enhanced the location_distance state with
+	  an output mode 'discharge_table'.
+
+2011-03-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Write human readable strings as label attribute into the DESCRIBE
+	  output. Those labels are used to be displayed in the GUI.
+
+2011-03-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  Added some further calculation types.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n strings for the
+	  calculation types
+
+2011-03-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Implemented the step-back part of the advance() operation.
+
+2011-03-21  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/resources/messages_de.properties: Fixed a german umlaut.
+
+2011-03-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Added new states for entering a
+	  location/distance and w/q.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: New string for the
+	  location/distance and w/q input states.
+
+2011-03-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/WQSelect.java:
+	  New. A state for the W/Q input of the WINFO parameterization.
+
+2011-03-18  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Append an attribute 'uiprovider' to the dynamic UI node.
+
+	* src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java:
+	  New. A state for the location/distance selection of the WINFO
+	  parameterization.
+
+2011-03-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added a new method getUIProvider() that might be overriden by concreted
+	  subclasses that should be rendered with a specific UIProvider.
+
+2011-03-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  The static UI part is created by the previous states now. This makes it
+	  possible to group the data objects (which is necessary to group the
+	  objects in the ui).
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Added a describeStatic() method that creates a node that contains the
+	  data of that state.
+
+2011-03-17  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/RiverService.java:
+	  Removed TODO: the document contains the rivers provided by the backend
+	  now.
+
+2011-03-17	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* pom.xml: Added dependency to flys backend.
+
+	* src/main/java/de/intevation/flys/artifacts/model/River.java:
+	  Removed. We are using the backend model now.
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java:
+	  Fetches the rivers from the backend.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Import fixes.
+
+2011-03-15	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* doc/conf/conf.xml: Added section for database backend configuration.
+
+2011-03-15	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  Fixed build error coming from different import of XMLUtils.
+
+2011-03-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  Appended the missing label node that contains the human readable name of
+	  the data item.
+
+2011-03-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java,
+	  src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  I18N of strings for the DESCRIBE document.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: I18N strings for the
+	  calculcation mode state.
+
+2011-03-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Modified the winfo states.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Adapted
+	  the artifact regarding the changes of the last commit. The states
+	  describe() method creates the dynamic UI node - the artifact needs to
+	  apply this node.
+
+	* src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java:
+	  New. The state for choosing the calculation mode.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Added i18n strings for the
+	  calculation mode state.
+
+2011-03-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/DefaultState.java:
+	  New. This is the base state for the FLYS application. It provides a
+	  method that creates the dynamic ui node for the DESCRIBE.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/GaugeSelect.java: Both
+	  classes extend the abstract base class DefaultState.
+
+2011-03-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/resources/Resources.java:
+	  New. This class retrieves the i18n strings from a ResourceBundle.
+
+	* src/main/resources/messages.properties,
+	  src/main/resources/messages_en.properties,
+	  src/main/resources/messages_de.properties: Resource files for german and
+	  english translation.
+
+2011-03-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Appended
+	  the data that have been inserted in former states into the static node
+	  of the DESCRIBE.
+
+2011-03-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: The
+	  operations feed() and advance() return the description of the artifact
+	  using the describe() operation. This avoids additional server round trips
+	  in the client - the clients gets to know about the new state of the
+	  artifact immediately.
+
+2011-03-10  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Implemented a part (step forward) of the advance operation.
+
+	* TODO: Implement Step-Back in advance operation.
+
+2011-03-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java:
+	  Implemented the abstract method getName(). It returns the constant
+	  'winfo' string.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Implemented the feed action. The data of an incoming feed() operation is
+	  stored in StateData objects that are saved in a map in the artifact.
+
+	  NOTE: There is no input validation and no i18n of error messages (see
+	  TODO).
+
+2011-03-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* TODO: This file contains some open points that need to be done.
+
+2011-03-09  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: New. This
+	  artifact serves as the default artifact for the FLYS application.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: This
+	  artifact now inherits from FLYSArtifact. Furthermore, there is one big
+	  change: we don't store the State objects itself in the artifact, but
+	  just the identifier of those. This makes the artifact smaller and more
+	  compatible agains previous versions of the software.
+
+2011-03-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/services/RiverService.java:
+	  New. This service will retrieve a list of provided rivers.
+
+	* doc/conf/conf.xml: Added a configuration for the RiverService.
+
+2011-03-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: Added a section user-factory and collection-factory in
+	  the factories part of the configuration.
+
+2011-03-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Replaced the 'special' attribute from DESCRIBE with a 'uiprovider'
+	  attribute.
+
+2011-02-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: The
+	  RiverSelect state is called to create the UI part of the describe
+	  document.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Implemented the dynamic UI part of describe(). The static part is not
+	  inserted into the describe document at the moment. We need a reference to
+	  the previous states for this.
+
+2011-02-08  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java,
+	  src/main/java/de/intevation/flys/artifacts/model/River.java: New. A model
+	  class that represents a river and its factory to create concrete river
+	  instances.
+	  NOTE: Currently, this is just a mockup. The factory just returns two
+	  static rivers "Mosel" and "Saar" without a connection to a backend.
+
+2011-02-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/StateFactory.java: The
+	  input data of a state is initialized with empty StateData objects after
+	  the State has been created.
+
+	* doc/conf/artifacts/winfo.xml: Renamed the input data nodes of the states
+	  which now fits better to the class name of the implementation.
+
+2011-02-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: The
+	  describe document returned by this artifact now contains the current state
+	  and the reachable states.
+
+2011-02-07  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  The transitions are put into the TransitionEngine with the ID of the state
+	  - not longer with the artifact name. On this way, we are able to fetch
+	  just the transitions for a specific state, instead of all the transitions
+	  of an artifact.
+
+2011-02-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Describe()
+	  returns the artifact's uuid and hash value. The whole implementation of
+	  describe() is still outstanding.
+
+2011-02-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/artifacts/winfo.xml: Removed useless config stuff.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: Removed
+	  useless methods, and improved the init process - the first state is set as
+	  the current state for this artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java,
+	  src/main/java/de/intevation/flys/artifacts/states/GaugeSelect.java: New.
+	  The states are used in the first two steps of the WINFOArtifact.
+	  Currently, they just implement stubs of the necessary methods setup() and
+	  describe().
+
+2011-02-04  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/State.java,
+	  src/main/java/de/intevation/flys/artifacts/transitions/TransitionEngine.java,
+	  src/main/java/de/intevation/flys/artifacts/transitions/Transition.java:
+	  Removed. These classes are placed in the artifact-database now.
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/DefaultTransition.java,
+	  src/main/java/de/intevation/flys/artifacts/transitions/TransitionFactory.java:
+	  Adapted imports of Transition.
+
+	* src/main/java/de/intevation/flys/artifacts/states/StateFactory.java: New.
+	  This factory should be used to create concrete State objects.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java: Added
+	  a constant key to store the StateEngine in the context.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  New method that initializes the states at application start.
+
+2011-02-03  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/states/State.java: New. The
+	  interface description of a state.
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/Transition.java,
+	  src/main/java/de/intevation/flys/artifacts/transitions/DefaultTransition.java:
+	  New. The interface description and a default implementation of a
+	  transition.
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/TransitionEngine.java:
+	  New. The TransitionEngine stores all transitions for each artifact and
+	  should be used to determine, if an artifact can advance from one state to
+	  another.
+
+	* src/main/java/de/intevation/flys/artifacts/transitions/TransitionFactory.java:
+	  New. Transitions should be created by using this class.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java: New.
+	  The Flys context. It currently defines keys to store important components
+	  in the context.
+
+	* src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java:
+	  New. The context factory initializes the basic components of the
+	  application. Currently, the TransitionEngine is created and all artifacts
+	  with its transitions are read from the global configuration and stored in
+	  the FLYSContext.
+
+	* pom.xml: Added a dependency to the 'artifacts-common' package.
+
+	* doc/conf/artifacts/winfo.xml: Corrected the classname of the
+	  DefaultTransition.
+
+	* doc/conf/conf.xml: Added FLYSContextFactory as context-factory.
+
+2011-02-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* doc/conf/conf.xml: An initial configuration file for the FLYS artifact
+	  server.
+
+	* doc/conf/artifacts/winfo.xml: An initial transition configuration of an
+	  WINFO artifact.
+
+	* src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java: A stub of
+	  an artifact for a WINFO parameterization.
+
+	* pom.xml: Set the source code version to 1.5.
+
+2011-02-01	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/**, pom.xml: Added initial maven project.
+	* ChangeLog: new.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/Changes	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,310 @@
+2011-09-19  RELEASE 2.5
+
+    NEW:
+
+        * Introduced the concept of a "datacage": the datacage is a service that
+          provides a list of chart themes that fit to a given chart type. The
+          service accepts a user uuid, the uuid of a master Artifact, the name
+          of the output type and a set of further string parameters. In general,
+          we distinguish between user-specific datacage and system-specific
+          datacage:
+          The user-specific datacage returns themes provided by old
+          calculations computed by the user.
+          The system-specific datacage returns themes that might be generated
+          using the data stored in the flys-backend.
+
+        * Introduced a database used by the datacage that stores information
+          about Artifacts, their outputs and their facets. This database
+          requires synchronization with the Artifact database. The intent of
+          this database is to have a fast access to data stored in Artifacts.
+
+        * Introduced a mechanism to clone existing Artifacts (with or without
+          restrictions). For cloning an Artifact, it is necessary to specify the
+          UUID of a "model Artifact". The clone will be based on that model by
+          extracting all required data from it.
+
+        * Introduced "recommendations": recommendations are themes in charts or
+          maps (Artifacts/Facets) that should be added automatically to an
+          existing chart/map. They are provided by the datacage.
+
+        * Introduced new Artifact types to provide further chart themes:
+          - Annotations
+          - Mainvalues
+
+        * Introduced new Facet type WMSLayerFacet. This type stores all required
+          information (server url, layer names, layer extent, layer srid) to
+          display a WMS layer in a WMS client.
+
+        * Introduced a new chart output "Querprofildiagramm". This output
+          calculates a waterlevel and displays it as single line together with
+          one or more cross section lines ("Querprofilspuren").
+
+        * Introduced a new chart output "W-Differenzen". This output calculates
+          waterlevel differences based on at least two waterlevels (a
+          "W-Differenzen" output can consist of more than a single waterlevel
+          difference calculation). Each waterlevel difference calculation
+          results in three chart themes: two W curves and a W-Differences curve.
+
+        * Introduced a new output "Ãœberschwemmungskarte". The visualization of
+          this output is a map. One of the map's layers is a WMS layer that
+          displays the calculation result of WSPLGEN (external C++ tool).
+
+        * Improved the rendering process of chart themes: the styles configured
+          for themes are now used.
+
+        * Improved the DistanceInfoService: it supports filters to filter the
+          type of items returned by this service (reduces the number of returned
+          items of course).
+
+        * Introduced a CSV export for "W-Differenzen".
+
+        * Downgraded GNU Trove to 1.1-beta-5 (later versions have been removed
+          from maven repositories).
+
+
+    FIXES:
+
+        * flys/issue135 (Diagramm: Trotz abgeschalteter Themen bleiben Beschriftungen bestehen)
+
+        * flys/issue159 (WINFO: Radiobutton - Ortsauswahl bei "W für ungleichwertigen Abflusslängsschnitt" entfernen)
+
+        * flys/issue160 (WINFO: Auswahltabelle Orte bei Modus Strecke nach Step-Back)
+
+        * flys/issue176 (Diagramm: Benennung eines Abflusses bei gewählter Höhe am Pegel)
+
+        * flys/issue180 (WINFO: Zeilen der Tabelle können nach der Markierung in die Zwischenablage kopiert werden.)
+
+        * flys/issue181 (Erstes Thema in der Themenliste wählt sich automatisch wieder an)
+
+        * flys/issue191 (AT-Export: Längsten monoton steigenden Bereich exportieren.)
+
+        * flys/issue219 (W-INFO: Abflusskurvenberechnung / keine Themen im Diagramm)
+
+        * flys/issue254 (Datenkorb: Klonen von Artefakten in anderen Collections + Facettenfilter zum Ausblenden)
+
+        * flys/issue256 (Datenkorb: XXX Issue festhalten)
+
+        * flys/issue258 (Datenkorb: Outs statt States führen)
+
+        * flys/issue259 (Daten aus Datenkorb in Diagramm einladen)
+
+        * flys/issue260 (Datenkorb: Masterartefakt in View aufführen)
+
+        * flys/issue262 (Datenkorb: Vereinigung der beiden Konfigurations-Templates)
+
+        * flys/issue279 (WINFO: Elbe Wasserspiegellage - Index Out of Bounds)
+
+        * flys/issue280 (BoundingBoxen von Streckenfavoriten und Haupt- und Extremwerten unsichtbar machen)
+
+        * flys/issue281 (Karte: Auswahl der berechnten Wasserspiegellage über Inline-Datenkorb)
+
+        * flys/issue282 (Karte: Abstand interpolierte Profile - Default wert)
+
+        * flys/issue290 (Karte: Eingabe von Differenzen zw. WSP und Gelände findet keine Ausprägung in der Karte)
+
+        * flys/issue303 (Keine Streckenfavoriten, wenn nur Q im Längsschnittdiagram ausgewählt)
+
+        * flys/issue309 (Querprofil: Manuelle Eingabe funktioniert nicht nach Return (nur nach Tab))
+
+        * flys/issue310 (Querprofil: Farben der Themen)
+
+        * flys/issue311 (Querprofil: i18n)
+
+
+
+2011-06-27  RELEASE 2.4
+
+    NEW:
+
+        * Finalized the Facet concept: output modes and the output generation
+          are now based on facets. Facets are created dynamically by an Artifact
+          based on the results of a calculation.
+
+        * Introduced a report mechanism that gives feedback of calculation
+          problems.
+
+        * Introduced output modes that generate XML document with calculation
+          report information.
+
+        * Introduced deactivated themes in charts: such themes are not rendered.
+
+        * Introduced a cache to store distance info per river.
+
+        * Introduced output modes that generate XML documents which contain meta
+          information of charts as axes ranges, data ranges and a transformation
+          matrix that allows to transform image coordinates into chart
+          coordinates.
+
+        * Added support for zoom values in Chart output modes.
+
+        * Added support for min/max values in DESCRIBE documents.
+
+        * Added "Oberkante" and "Unterkante" columns to distance info service.
+
+        * Added a new export mode to save data in AT format.
+
+        * Improved performance while storing/loading Q values of WST columns.
+
+        * Improved the WQ values validation for calculation 1 & 4.
+
+        * Improved calculations to work independent of "from"/"to" order of
+          kilometer ranges.
+
+        * Improved the input of WQ values for calculation 1. We distinguish
+          between a selected Q at a given gauge or a selected Q that doesn't
+          base on a given gauge.
+
+        * Allow "from" to be greater than "to" in kilometer ranges.
+
+        * Write default values of the user into the Artifact's DESCRIBE
+          document (flys/issue40).
+
+
+    FIXES:
+
+        * flys/issue62 Artifacts no longer share their data with each other.
+
+        * flys/issue77 Added titles for themes in duration curve charts.
+
+        * flys/issue81
+
+        * flys/issue82 Fixed NPE after a calculation has taken place.
+
+        * flys/issue84
+
+        * flys/issue85 Fixed location input for calculation 1 & 4.
+
+        * flys/issue86 Fixed Q determination based on a given W.
+
+        * flys/issue90 Removed space between chart axes and chart area.
+
+        * flys/issue93 Renamed calculation 4.
+
+        * flys/issue103 Append values selected by the user in the correct format
+          to the DESCRIBE document of Artifacts (uses i18n).
+
+        * flys/issue147
+
+        * flys/issue150 Invert the X axis correctly for charts of type
+          calculation 1 & 4.
+
+        * flys/issue154 Repaired computed discharge curve that broke after the
+          facets had been finalized.
+
+        * flys/issue157 Discharge curve charts (computed an static) will now
+          have a lower x value set to "1".
+
+        * flys/issue161 Longitudinal section chart's second Y axis will
+          initially start at Q=0.
+
+        * flys/issue164 Improved input validation for WQ input of calculation 4.
+
+        * flys/issue172 Duration curve charts will now have a lower x value set
+          to "0".
+
+        * flys/issue173 Fixed broken gauge determination in calculation 4.
+
+        * flys/issue174 Repaired broken upper margin between chart data and
+          chart border in longitudinal section charts.
+
+        * Added missing "Corrected W" facet for results of calculation 4.
+
+        * Map datasets in duration curve charts to the correct axes.
+
+        * Fixed broken XPath to detect output modes in an attribute document of
+          a Collection.
+
+        * Feed operation will no longer save data if the validation of the given
+          values failed.
+
+
+
+2011-05-19  RELEASE 2.3.1
+
+    NEW:
+
+        * New export format for waterlevels: WST.
+
+        * Added descriptions for the curves of the following charts:
+          - discharge curves (dt. 'Abflusskurven am Pegel')
+          - computed discharge curves (dt. 'berechnete Abflusskurven')
+          - longitudinal section curves (dt. 'Längsschnitt')
+          - discharge longitudinal section curves (dt. 'Abflusslängsschnitt')
+
+        * Number formatting is done in a central place/class.
+
+    FIXES:
+
+        * flys/issue47 (Diagramm: Farbliche Unterscheidung von Abfluß und Wasserstand)
+
+        * flys/issue52 (WINFO: W-Längsschnitt - Wasser jeweils von links nach rechts laufen lassen)
+
+        * flys/issue53 (WINFO/Berechnungsausgabe: Kilometerierung und Wasserstände werden zum Teil mit vielen Nachkommastellen angezeigt)
+
+        * flys/issue66: (i18n: Untertitel bei Längsschnitten - Bereich der Strecke enthält "double")
+
+        * flys/issue67 (WINFO: Längsschnitt - Wasser fließt bergauf)
+
+        * flys/issue72: (WINFO: Q/W/D-Info liefert selten eine Antwort)
+
+
+
+2011-05-13  RELEASE 2.3
+
+    NEW:
+
+        * Initial release of the artifacts for FLYS. Currently there is a single
+          WINFO artifact for the following computations:
+          - waterlevels
+          - discharge curves
+          - duration curves
+          - discharge longitudinal section curves
+
+        * Configuration is placed in doc/conf/conf.xml
+
+        * WINFO Artifact specific configuration is placed in
+          doc/conf/artifacts/winfo.xml
+
+        * So called 'OutGenerators' produce different types of output.
+          Currently, the flys-artifacts are able to produce charts and exports.
+          Each output type has to be configured in conf.xml.
+
+        * New chart types:
+          - discharge curves (dt. 'Abflusskurven am Pegel')
+          - computed discharge curves (dt. 'Abflusskurve')
+          - longitudinal section curves (dt. 'Längsschnitte')
+          - duration curves (dt. 'Dauerlinie')
+          - discharge longitudinal section curve (dt. 'W bei
+            ungleichmäßigem Abflusslängsschnitt')
+
+        * New exports:
+          - csv of waterlevels
+          - csv of duration curves
+          - csv of computed discharge curves
+          - csv of discharge longitudinal section
+
+        * New services that provides:
+          - supported rivers
+          - main values of a gauge
+          - range information of a river
+          - meta information of a river
+
+        * Caching of computation relevant values
+
+        * Initial model to support chart specific themes (theme.xml)
+
+
+    LIMITATIONS:
+
+        * Charts are not rendered using the themes in theme.xml
+
+
+    !!!
+
+    The version number of this release depends on an existing desktop variant of
+    this software that is in version 2.1.
+
+    !!!
+
+
+2011-03-30  RELEASE 0.1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/NEWS	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,13 @@
+NEWS 
+
+for enduser-specific information, c.f. the NEWS -file in the module flys-client
+
+2011-05-19  Release V 2.3.1
+    * Bugfixing Release for WINFO
+
+2011-05-16  Release V 2.3.0
+    * Enhanced functionality for WINFO, diagram and Data-Manager (Datenkorb)
+
+2011-03-27  Release V 2.2
+
+This file starts with V. 2.2. Earlier versions are based on a Desktop-version until V 2.1.3.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/TODO	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,1 @@
+- Validation of the input values of an incoming feed() call
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/contrib/visualize-transitions.xsl	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+ Copyright (c) 2010 by Intevation GmbH
+
+ This program is free software under the LGPL (>=v2.1)
+ Read the file LGPL.txt coming with the software for details
+ or visit http://www.gnu.org/licenses/ if it does not exist.
+
+ Author: Sascha L. Teichmann (sascha.teichmann@intevation.de)
+-->
+
+<xsl:stylesheet 
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:xlink="http://www.w3.org/1999/xlink"
+    version="1.0">
+
+    <xsl:output method="text" encoding="UTF-8"/>
+
+    <xsl:param name="base-dir">.</xsl:param>
+
+    <xsl:template match="/">
+        <xsl:text>digraph transition_model {&#xa;</xsl:text>
+        <xsl:apply-templates />
+        <xsl:text>}&#xa;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="artifact">
+        <xsl:choose>
+            <xsl:when test="@xlink:href != ''">
+                <!-- handle external artifacts -->
+                <xsl:variable name="path">
+                    <xsl:call-template name="string-replace-all">
+                    <xsl:with-param name="text" select="@xlink:href" />
+                    <xsl:with-param name="replace">${artifacts.config.dir}</xsl:with-param>
+                    <xsl:with-param name="by" select="$base-dir" />
+                    </xsl:call-template>
+                </xsl:variable>
+                <xsl:for-each select="document($path)">
+                    <xsl:apply-templates select="/artifact"/>
+                </xsl:for-each>
+            </xsl:when>
+            <xsl:otherwise>
+                <!-- handle internal artifacts -->
+                <xsl:text>subgraph </xsl:text><xsl:value-of select="@name"/>
+                <xsl:text> {&#xa;</xsl:text>
+                <xsl:text>    label = "Artefakt: </xsl:text>
+                <xsl:value-of select="@name"/>
+                <xsl:text>";&#xa;</xsl:text>
+                <xsl:apply-templates mode="inside-artifact" select="./states/state"/>
+                <xsl:apply-templates mode="inside-artifact" select="./states/transition"/>
+                <xsl:text>}&#xa;</xsl:text>
+            </xsl:otherwise>
+        </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="state" mode="inside-artifact">
+        <xsl:text>    "</xsl:text>
+        <xsl:value-of select="@id"/>
+        <xsl:text disable-output-escaping="yes"
+        >" [ shape = "record" label=&lt;&lt;table border="0" cellborder="0" cellpadding="3"&gt;
+        &lt;tr&gt;&lt;td align="center" colspan="2" bgcolor="black"&gt;&lt;font color="white"&gt;</xsl:text>
+        <xsl:value-of select="@id"/>
+        <xsl:text disable-output-escaping="yes"
+        >&lt;/font&gt;&lt;/td&gt;&lt;/tr&gt;</xsl:text>
+            <xsl:apply-templates mode="inside-artifact" />
+        <xsl:text disable-output-escaping="yes"
+        >&lt;/table&gt;&gt;]</xsl:text>
+        <xsl:text>;&#xa;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="data" mode="inside-artifact">
+        <xsl:text disable-output-escaping="yes"
+        >&lt;tr&gt;&lt;td align="right"&gt;</xsl:text>
+        <xsl:value-of select="@name"/>
+        <xsl:text disable-output-escaping="yes"
+        >&lt;/td&gt;&lt;td align="left"&gt;</xsl:text>
+        <xsl:value-of select="@type"/>
+        <xsl:text disable-output-escaping="yes"
+        >&lt;/td&gt;&lt;/tr&gt;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="transition" mode="inside-artifact">
+        <xsl:text>    "</xsl:text>
+        <xsl:value-of select="from/@state"/>
+        <xsl:text disable-output-escaping="yes">" -&gt; "</xsl:text>
+        <xsl:value-of select="to/@state"/>
+        <xsl:text>"</xsl:text>
+        <xsl:apply-templates mode="inside-artifact"/>
+        <xsl:text>;&#xa;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="condition" mode="inside-artifact">
+        <xsl:text> [ label="</xsl:text>
+        <xsl:value-of select="@inputvalue"/>
+        <xsl:text> </xsl:text>
+        <xsl:value-of select="@operator"/>
+        <xsl:text> </xsl:text>
+        <xsl:value-of select="@value"/>
+        <xsl:text>" ]</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="text()" mode="inside-artifact"/>
+    <xsl:template match="text()"/>
+
+     <xsl:template name="string-replace-all">
+        <xsl:param name="text" />
+        <xsl:param name="replace" />
+        <xsl:param name="by" />
+        <xsl:choose>
+          <xsl:when test="contains($text, $replace)">
+            <xsl:value-of select="substring-before($text,$replace)" />
+            <xsl:value-of select="$by" />
+            <xsl:call-template name="string-replace-all">
+              <xsl:with-param name="text"
+                  select="substring-after($text,$replace)" />
+              <xsl:with-param name="replace" select="$replace" />
+              <xsl:with-param name="by" select="$by" />
+            </xsl:call-template>
+          </xsl:when>
+          <xsl:otherwise>
+            <xsl:value-of select="$text" />
+          </xsl:otherwise>
+        </xsl:choose>
+      </xsl:template>
+    
+</xsl:stylesheet>
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/artifacts/annotation.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<artifact name="annotation">
+    <states>
+        <state id="state.annotation.river"
+               description="state.annotation.river"
+               state="de.intevation.flys.artifacts.states.AnnotationRiverState">
+           <outputmodes>
+             <outputmode name="longitudinal_section" description="output.longitudinal_section" mime-type="image/png" type="chart">
+                  <facets>
+                     <facet name="longitudinal_section.annotations" description="facet.longitudinal_section.annotations" />
+                  </facets>
+              </outputmode>
+           </outputmodes>
+        </state>
+    </states>
+</artifact>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/artifacts/riveraxis.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<artifact name="riveraxis">
+    <states>
+        <state id="state.riveraxis.layer"
+               description="state.riveraxis.layer.description"
+               state="de.intevation.flys.artifacts.states.RiverAxisState">
+            <outputmodes>
+                <outputmode name="floodmap" description="output.uesk.map.description" type="map">
+                    <facets>
+                        <facet name="floodmap.riveraxis"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+    </states>
+</artifact>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/artifacts/winfo.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,356 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<artifact name="winfo">
+    <states>
+
+        <state id="state.winfo.river" description="state.winfo.river" state="de.intevation.flys.artifacts.states.RiverSelect">
+            <data name="river" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.river"/>
+            <to state="state.winfo.calculation_mode"/>
+        </transition>
+
+        <state id="state.winfo.calculation_mode" description="state.winfo.calculation_mode" state="de.intevation.flys.artifacts.states.CalculationSelect">
+            <data name="calculation_mode" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.location_distance"/>
+            <condition data="calculation_mode" value="calc.surface.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.distance"/>
+            <condition data="calculation_mode" value="calc.flood.map" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.location"/>
+            <condition data="calculation_mode" value="calc.discharge.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.location"/>
+            <condition data="calculation_mode" value="calc.duration.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.distance"/>
+            <condition data="calculation_mode" value="calc.discharge.longitudinal.section" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.calculation_mode"/>
+            <to state="state.winfo.waterlevel_pair_select"/>
+            <condition data="calculation_mode" value="calc.w.differences" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.waterlevel_pair_select"/>
+            <to state="state.winfo.w_differences"/>
+            <condition data="calculation_mode" value="calc.w.differences" operator="equal"/>
+        </transition>
+
+        <state id="state.winfo.location" description="state.winfo.location" state="de.intevation.flys.artifacts.states.LocationSelect">
+            <data name="ld_locations" type="Double[]" />
+
+            <outputmodes>
+                <outputmode name="discharge_curve" description="output.discharge_curve" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="discharge_curve.curve" description="facet.discharge_curve.curve"/>
+                    </facets>
+                </outputmode>
+                <!-- TODO: Do we want an error report? -->
+            </outputmodes>
+        </state>
+
+        <state id="state.winfo.distance" description="state.winfo.distance" state="de.intevation.flys.artifacts.states.DistanceSelect">
+            <data name="ld_from" type="Double" />
+            <data name="ld_to"   type="Double" />
+            <data name="ld_step" type="Double" />
+
+            <outputmodes>
+                <outputmode name="discharge_curve" description="output.discharge_curve" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="discharge_curve.curve" description="facet.discharge_curve.curve"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.distance"/>
+            <to state="state.winfo.uesk.wsp"/>
+            <condition data="calculation_mode" value="calc.flood.map" operator="equal"/>
+        </transition>
+
+        <state id="state.winfo.location_distance" description="state.winfo.location_distance" state="de.intevation.flys.artifacts.states.LocationDistanceSelect">
+            <data name="ld_mode" type="String" />
+            <data name="ld_locations" type="Double[]" />
+            <data name="ld_from" type="Double" />
+            <data name="ld_to" type="Double" />
+            <data name="ld_step" type="Double" />
+
+            <outputmodes>
+                <outputmode name="discharge_curve" description="output.discharge_curve" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="discharge_curve.curve" description="facet.discharge_curve.curve"/>
+                    </facets>
+                </outputmode>
+                <!-- TODO: Do we want an error report? -->
+            </outputmodes>
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.distance"/>
+            <to state="state.winfo.wq_adapted"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.location_distance"/>
+            <to state="state.winfo.wq"/>
+            <condition data="calculation_mode" value="calc.surface.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.location"/>
+            <to state="state.winfo.durationcurve"/>
+            <condition data="calculation_mode" value="calc.duration.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.location"/>
+            <to state="state.winfo.computeddischargecurve"/>
+            <condition data="calculation_mode" value="calc.discharge.curve" operator="equal"/>
+        </transition>
+
+        <state id="state.winfo.wq" description="state.winfo.wq" state="de.intevation.flys.artifacts.states.WQSelect">
+            <data name="wq_mode" type="String" />
+            <data name="wq_free" type="Boolean" />
+            <data name="wq_selection" type="String" />
+            <data name="wq_from" type="Double" />
+            <data name="wq_to" type="Double" />
+            <data name="wq_step" type="Double" />
+            <data name="wq_single" type="Double[]" />
+        </state>
+
+        <state id="state.winfo.wq_adapted" description="state.winfo.wq_adapted" state="de.intevation.flys.artifacts.states.WQAdapted">
+            <!-- TODO Add data objects -->
+            <data name="wq_mode" type="String" />
+            <data name="wq_values" type="WQTriple" />
+        </state>
+
+        <state id="state.winfo.waterlevel_pair_select" description="state.winfo.waterlevel_pair_select" state="de.intevation.flys.artifacts.states.WaterlevelPairSelectState">
+            <data name="diffids" type="String" />
+        </state>
+
+        <state id="state.winfo.w_differences" description="state.winfo.w_differences" state="de.intevation.flys.artifacts.states.WDifferencesState">
+            <data name="diffids" type="String" />
+
+            <outputmodes>
+                <outputmode name="w_differences" description="output.w_differences" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="w_differences" description="facet.w_differences"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="w_differences_export" description="output.w_differences.export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="csv" description="facet.w_differences.csv" />
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <state id="state.winfo.durationcurve" description="state.winfo.durationcurve" state="de.intevation.flys.artifacts.states.DurationCurveState">
+            <outputmodes>
+                <outputmode name="duration_curve" description="output.duration_curve" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="duration_curve.w" description="facet.duration_curve.w"/>
+                        <facet name="duration_curve.q" description="facet.duration_curve.q"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="durationcurve_export" description="output.durationcurve_export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="csv" description="facet.durationcurve_export.csv" />
+                    </facets>
+                </outputmode>
+                <outputmode name="durationcurve_report" description="output.durationcurve_report" mime-type="text/xml" type="report">
+                    <facets>
+                        <facet name="report" description="facet.durationcurve_export.report" />
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <state id="state.winfo.computeddischargecurve" description="state.winfo.computeddischargecurve" state="de.intevation.flys.artifacts.states.ComputedDischargeCurveState">
+            <outputmodes>
+                <outputmode name="computed_discharge_curve" description="output.computed_discharge_curve" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="computed_discharge_curve.q" description="facet.computed_discharge_curve.q"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="computed_dischargecurve_export" description="output.computed_dischargecurve_export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="csv" description="facet.computed_dischargecurve_export.csv" />
+                    </facets>
+                </outputmode>
+                <outputmode name="computed_dischargecurve_report" description="output.computed_dischargecurve_report" mime-type="text/xml" type="report">
+                    <facets>
+                        <facet name="report" description="facet.computed_dischargecurve_export.report"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="computed_dischargecurve_at_export" description="output.computed_dischargecurve_at_export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="at" description="facet.computed_dischargecurve_export.at"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.ValueCompareTransition">
+            <from state="state.winfo.wq"/>
+            <to state="state.winfo.waterlevel"/>
+            <condition data="calculation_mode" value="calc.surface.curve" operator="equal"/>
+        </transition>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.wq_adapted"/>
+            <to state="state.winfo.discharge_longitudinal_section"/>
+        </transition>
+
+        <state id="state.winfo.waterlevel" description="state.winfo.waterlevel" state="de.intevation.flys.artifacts.states.WaterlevelState">
+            <outputmodes>
+                <outputmode name="longitudinal_section" description="output.longitudinal_section" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="longitudinal_section.w" description="facet.longitudinal_section.w"/>
+                        <facet name="longitudinal_section.q" description="facet.longitudinal_section.q"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="waterlevel_export" description="output.waterlevel_export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="csv" description="facet.waterlevel_export.csv" />
+                        <facet name="wst" description="facet.waterlevel_export.wst" />
+                    </facets>
+                </outputmode>
+                <outputmode name="waterlevel_report" description="output.waterlevel_report" mime-type="text/xml" type="report">
+                    <facets>
+                        <facet name="report" description="facet.waterlevel_export.report"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="cross_section" description="output.cross_section" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="cross_section_water_line" description="facet.cross_section_water_line"/>
+                        <facet name="cross_section" description="facet.cross_section"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <state id="state.winfo.discharge_longitudinal_section" description="state.winfo.discharge_longitudinal_section" state="de.intevation.flys.artifacts.states.DischargeLongitudinalSection">
+            <outputmodes>
+                <outputmode name="discharge_longitudinal_section" description="output.discharge_longitudinal_section" mime-type="image/png" type="chart">
+                    <facets>
+                        <facet name="discharge_longitudinal_section.w"/>
+                        <facet name="discharge_longitudinal_section.q"/>
+                        <facet name="discharge_longitudinal_section.c"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="discharge_longitudinal_section_export" description="output.discharge_longitudinal_section_export" mime-type="text/plain" type="export">
+                    <facets>
+                        <facet name="csv" description="facet.discharge_longitudinal_section_export.csv" />
+                        <facet name="wst" description="facet.discharge_longitudinal_section_export.wst" />
+                    </facets>
+                </outputmode>
+                <outputmode name="discharge_longitudinal_section_report" description="output.discharge_longitudinal_section_report" mime-type="text/xml" type="report">
+                    <facets>
+                        <facet name="report" description="facet.discharge_longitudinal_section_export.report"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.waterlevel"/>
+            <to state="state.winfo.uesk.dgm"/>
+        </transition>
+
+        <state id="state.winfo.uesk.wsp" description="state.winfo.uesk.wsp" state="de.intevation.flys.artifacts.states.WaterlevelSelectState">
+            <data name="wsp" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.wsp"/>
+            <to state="state.winfo.uesk.dgm"/>
+        </transition>
+
+        <state id="state.winfo.uesk.dgm" description="state.winfo.uesk.dgm" state="de.intevation.flys.artifacts.states.DGMSelect">
+            <data name="dgm" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.dgm"/>
+            <to state="state.winfo.uesk.profiles"/>
+        </transition>
+
+        <state id="state.winfo.uesk.profiles" description="state.winfo.uesk.profiles" state="de.intevation.flys.artifacts.states.ProfileDistanceSelect">
+            <data name="profile_distance" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.profiles"/>
+            <to state="state.winfo.uesk.floodplain"/>
+        </transition>
+
+        <state id="state.winfo.uesk.floodplain" description="state.winfo.uesk.floodplain.description" state="de.intevation.flys.artifacts.states.FloodplainChoice">
+            <data name="use_floodplain" type="Boolean" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.floodplain"/>
+            <to state="state.winfo.uesk.differences"/>
+        </transition>
+
+        <state id="state.winfo.uesk.differences" description="state.winfo.uesk.differences" state="de.intevation.flys.artifacts.states.WaterlevelGroundDifferences">
+            <data name="diff_from" type="Double" />
+            <data name="diff_to"   type="Double" />
+            <data name="diff_diff" type="Double" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.differences"/>
+            <to state="state.winfo.uesk.scenario"/>
+        </transition>
+
+        <state id="state.winfo.uesk.scenario" description="state.winfo.uesk.scenario" state="de.intevation.flys.artifacts.states.ScenarioSelect">
+            <data name="scenario" type="String" />
+            <data name="uesk.barriers" type="String" />
+        </state>
+
+        <transition transition="de.intevation.flys.artifacts.transitions.DefaultTransition">
+            <from state="state.winfo.uesk.scenario"/>
+            <to state="state.winfo.uesk.uesk"/>
+        </transition>
+
+        <state id="state.winfo.uesk.uesk" description="state.winfo.uesk.uesk" state="de.intevation.flys.artifacts.states.FloodMapState">
+            <outputmodes>
+                <outputmode name="floodmap" description="output.uesk.map.description" type="map">
+                    <facets>
+                        <facet name="floodmap.wsplgen"/>
+                    </facets>
+                </outputmode>
+                <outputmode name="wsplgen_report" description="output.wsplgen_report" mime-type="text/xml" type="report">
+                    <facets>
+                        <facet name="report" description="facet.wsplgen_export.report"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+
+    </states>
+</artifact>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/artifacts/wmsbackground.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<artifact name="wmsbackground">
+    <states>
+        <state id="state.wmsbackground.layer"
+               description="state.wmsbackground.layer.description"
+               state="de.intevation.flys.artifacts.states.WMSBackgroundState">
+            <outputmodes>
+                <outputmode name="floodmap" description="output.uesk.map.description" type="map">
+                    <facets>
+                        <facet name="floodmap.wmsbackground"/>
+                    </facets>
+                </outputmode>
+            </outputmodes>
+        </state>
+    </states>
+</artifact>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/cache.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ehcache>
+
+    <diskStore path="java.io.tmpdir"/>
+
+    <defaultCache
+            maxElementsInMemory="1000"
+            eternal="false"
+            timeToIdleSeconds="120"
+            timeToLiveSeconds="3600"
+            overflowToDisk="true"
+            maxElementsOnDisk="100000"
+            diskPersistent="false"
+            diskExpiryThreadIntervalSeconds="120"
+            memoryStoreEvictionPolicy="LRU"
+            />
+
+    <!-- This one is used for the WST value tables -->
+
+    <cache name="wst-value-table"
+           maxElementsInMemory="20"
+           maxElementsOnDisk="100"
+           eternal="false"
+           timeToIdleSeconds="360"
+           overflowToDisk="true"
+           timeToLiveSeconds="14400"
+           diskPersistent="true"
+           memoryStoreEvictionPolicy="LRU"
+           />
+
+    <!-- This one is used to cache the distance infos per river as Documents -->
+    <cache name="service-distanceinfo"
+           maxElementsInMemory="20"
+           eternal="false"
+           timeToIdleSeconds="360"
+           timeToLiveSeconds="86400"
+           memoryStoreEvictionPolicy="LFU"
+           />
+
+    <!-- This one is used to cache the distance infos per river as Lists -->
+    <cache name="annotations"
+           maxElementsInMemory="200"
+           eternal="false"
+           timeToIdleSeconds="360"
+           timeToLiveSeconds="86400"
+           memoryStoreEvictionPolicy="LFU"
+           />
+
+    <!-- This one is used to cache the computed values.-->
+    <cache name="computed.values"
+           maxElementsInMemory="200"
+           eternal="false"
+           timeToLiveSeconds="172800"
+           overflowToDisk="true"
+           diskPersistent="true"
+           memoryStoreEvictionPolicy="LRU"
+           />
+
+    <!-- This one is used for the SQL statements used by the static datacage -->
+    <cache name="datacage.db"
+           maxElementsInMemory="2000"
+           eternal="false"
+           timeToLiveSeconds="7200"
+           memoryStoreEvictionPolicy="LFU"
+           />
+</ehcache>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/conf.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,203 @@
+<artifact-database>
+    <export-secret>YOUR_SECRET</export-secret>
+    <factories>
+        <context-factory>de.intevation.flys.artifacts.context.FLYSContextFactory</context-factory>
+
+        <collection-factory
+            name="DefaultArtifactCollectionFactory"
+            description="The default artifact collection factory"
+            ttl="21600000"
+            artifact-collection="de.intevation.flys.collections.FLYSArtifactCollection">de.intevation.artifactdatabase.DefaultArtifactCollectionFactory</collection-factory>
+
+        <artifact-factories>
+            <!-- All Artifactfactories which are available in this Database. -->
+            <artifact-factory name="winfo" description="Factory to create an artifact to be used in WINFO"
+                ttl="3600000"
+                artifact="de.intevation.flys.artifacts.WINFOArtifact">de.intevation.artifactdatabase.DefaultArtifactFactory</artifact-factory>
+            <artifact-factory name="riveraxis" description="Factory to create an artifact to be used in WINFO"
+                ttl="3600000"
+                artifact="de.intevation.flys.artifacts.RiverAxisArtifact">de.intevation.artifactdatabase.DefaultArtifactFactory</artifact-factory>
+            <artifact-factory name="wmsbackground" description="Factory to create an artifact to be used in WINFO"
+                ttl="3600000"
+                artifact="de.intevation.flys.artifacts.WMSBackgroundArtifact">de.intevation.artifactdatabase.DefaultArtifactFactory</artifact-factory>
+            <artifact-factory name="annotations" description="Factory to create an artifact to access Annotations for Points at rivers"
+                ttl="3600000"
+                artifact="de.intevation.flys.artifacts.AnnotationArtifact">de.intevation.artifactdatabase.DefaultArtifactFactory</artifact-factory>
+            <artifact-factory name="mainvalue" description="Factory to create an artifact to access Main Values for discharge curve diagrams"
+                ttl="3600000"
+                artifact="de.intevation.flys.artifacts.MainValuesArtifact">de.intevation.artifactdatabase.DefaultArtifactFactory</artifact-factory>
+        </artifact-factories>
+
+        <user-factory name="default" description="Factory to create new users">de.intevation.artifactdatabase.DefaultUserFactory</user-factory>
+
+        <service-factories>
+            <service-factory
+                name="rivers"
+                service="de.intevation.flys.artifacts.services.RiverService"
+                description="This service returns a list of provided rivers by the artifact server.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+            <service-factory
+                name="distanceinfo"
+                service="de.intevation.flys.artifacts.services.DistanceInfoService"
+                description="Returns a list of distances supported by a specific river.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+            <service-factory
+                name="mainvalues"
+                service="de.intevation.flys.artifacts.services.MainValuesService"
+                description="Returns the main values of a river's gauge based on a start and end point of the river.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+            <service-factory
+                name="metadata"
+                service="de.intevation.flys.artifacts.services.MetaDataService"
+                description="The service provides some introspection into the database content.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+            <service-factory
+                name="mapinfo"
+                service="de.intevation.flys.artifacts.services.MapInfoService"
+                description="The service provides some basic information to create a WMS for a specific river.">de.intevation.artifactdatabase.DefaultServiceFactory</service-factory>
+        </service-factories>
+
+    </factories>
+
+    <lifetime-listeners>
+        <listener>de.intevation.flys.artifacts.datacage.Datacage</listener>
+    </lifetime-listeners>
+
+    <backend-listeners>
+        <listener>de.intevation.flys.artifacts.datacage.DatacageBackendListener</listener>
+    </backend-listeners>
+
+    <callcontext-listener
+        name="SessionCallContextListener"
+        description="A CallContext.Listener to open and close Hibernatesessions">de.intevation.flys.artifacts.context.SessionCallContextListener</callcontext-listener>
+
+    <artifacts>
+        <artifact name="winfo" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="${artifacts.config.dir}/artifacts/winfo.xml" />
+        <artifact name="riveraxis" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="${artifacts.config.dir}/artifacts/riveraxis.xml" />
+        <artifact name="annotation" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="${artifacts.config.dir}/artifacts/annotation.xml" />
+        <artifact name="wmsbackground" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="${artifacts.config.dir}/artifacts/wmsbackground.xml" />
+    </artifacts>
+
+
+    <hooks>
+        <hook
+            class="de.intevation.flys.artifacts.CollectionMonitor"
+            applies="post-feed,post-advance"
+            xmlns:xlink="http://www.w3.org/1999/xlink"
+            xlink:href="${artifacts.config.dir}/output-defaults.xml">
+        </hook>
+    </hooks>
+
+    <output-generators>
+        <output-generator name="discharge_curve">de.intevation.flys.exports.DischargeCurveGenerator</output-generator>
+        <output-generator name="discharge_curve_chartinfo">de.intevation.flys.exports.DischargeCurveInfoGenerator</output-generator>
+        <output-generator name="cross_section">de.intevation.flys.exports.CrossSectionGenerator</output-generator>
+        <output-generator name="cross_section_chartinfo">de.intevation.flys.exports.CrossSectionInfoGenerator</output-generator>
+        <output-generator name="computed_discharge_curve">de.intevation.flys.exports.ComputedDischargeCurveGenerator</output-generator>
+        <output-generator name="computed_discharge_curve_chartinfo">de.intevation.flys.exports.ComputedDischargeCurveInfoGenerator</output-generator>
+        <output-generator name="longitudinal_section">de.intevation.flys.exports.LongitudinalSectionGenerator</output-generator>
+        <output-generator name="longitudinal_section_chartinfo">de.intevation.flys.exports.LongitudinalSectionInfoGenerator</output-generator>
+        <output-generator name="duration_curve">de.intevation.flys.exports.DurationCurveGenerator</output-generator>
+        <output-generator name="duration_curve_chartinfo">de.intevation.flys.exports.DurationCurveInfoGenerator</output-generator>
+        <output-generator name="discharge_longitudinal_section">de.intevation.flys.exports.DischargeLongitudinalSectionGenerator</output-generator>
+        <output-generator name="discharge_longitudinal_section_chartinfo">de.intevation.flys.exports.DischargeLongitudinalSectionInfoGenerator</output-generator>
+        <output-generator name="waterlevel_export">de.intevation.flys.exports.WaterlevelExporter</output-generator>
+        <output-generator name="durationcurve_export">de.intevation.flys.exports.DurationCurveExporter</output-generator>
+        <output-generator name="computed_dischargecurve_export">de.intevation.flys.exports.ComputedDischargeCurveExporter</output-generator>
+        <output-generator name="discharge_longitudinal_section_export">de.intevation.flys.exports.DischargeLongitudinalSectionExporter</output-generator>
+        <output-generator name="w_differences">de.intevation.flys.exports.WDifferencesCurveGenerator</output-generator>
+        <output-generator name="w_differences_chartinfo">de.intevation.flys.exports.WDifferencesCurveInfoGenerator</output-generator>
+        <output-generator name="w_differences_export">de.intevation.flys.exports.WDifferencesExporter</output-generator>
+        <!-- Error report generators. -->
+        <output-generator name="discharge_longitudinal_section_report">de.intevation.flys.exports.ReportGenerator</output-generator>
+        <output-generator name="waterlevel_report">de.intevation.flys.exports.ReportGenerator</output-generator>
+        <output-generator name="computed_dischargecurve_report">de.intevation.flys.exports.ReportGenerator</output-generator>
+        <output-generator name="durationcurve_report">de.intevation.flys.exports.ReportGenerator</output-generator>
+        <output-generator name="wsplgen_report">de.intevation.flys.exports.ReportGenerator</output-generator>
+        <!-- AT exporter. -->
+        <output-generator name="computed_dischargecurve_at_export">de.intevation.flys.exports.ATExporter</output-generator>
+    </output-generators>
+
+    <!-- Path to the template file of the meta data. -->
+    <metadata>
+        <template>${artifacts.config.dir}/meta-data.xml</template>
+    </metadata>
+
+    <!-- The floodmap configuration for each supported river. Each element
+         requires a srid, wms and background-wms. Those information are used for
+         creating a Map view.-->
+    <floodmap>
+        <shapefile-path value="${artifacts.config.dir}/../shapefiles"/>
+        <mapserver>
+            <server path="http://flys-devel.intevation.de/cgi-bin/"/>
+            <mapfile path="${artifacts.config.dir}/../flys.map"/>
+            <templates path="${artifacts.config.dir}/mapserver/"/>
+            <map-template path="mapfile.vm"/>
+        </mapserver>
+
+        <velocity>
+            <logfile path="${artifacts.config.dir}/../velocity_log.log"/>
+        </velocity>
+
+        <river name="Saar">
+            <srid value="31466"/>
+            <river-wms url="http://flys-devel.intevation.de/cgi-bin/saar-wms"/>
+            <background-wms url="http://vmap0.tiles.osgeo.org/wms/vmap0" layers="basic"/>
+        </river>
+        <river name="Mosel">
+            <srid value="31466"/>
+            <river-wms url="http://flys-devel.intevation.de/cgi-bin/mosel-wms"/>
+            <background-wms url="http://vmap0.tiles.osgeo.org/wms/vmap0" layers="basic"/>
+        </river>
+        <river name="Elbe">
+            <srid value="31466"/>
+            <river-wms url="http://flys-devel.intevation.de/cgi-bin/elbe-wms"/>
+            <background-wms url="http://vmap0.tiles.osgeo.org/wms/vmap0" layers="basic"/>
+        </river>
+    </floodmap>
+
+    <rest-server>
+        <!--  The port which the ArtifactDatabase will bind to. -->
+        <port>8181</port>
+        <listen>localhost</listen>
+    </rest-server>
+    <!-- Garbage collection of outdated artifacts. -->
+    <cleaner>
+        <sleep-time>60000</sleep-time>
+    </cleaner>
+
+    <cache>
+        <config-file>${artifacts.config.dir}/cache.xml</config-file>
+    </cache>
+
+    <!-- This is the default configuration of the datacage db:
+    <datacage>
+        <user/>
+        <password/>
+        <driver>org.h2.Driver</driver>
+        <url>jdbc:h2:mem:datacage;INIT=RUNSCRIPT FROM '${artifacts.config.dir}/datacage.sql'</url>
+    </datacage>
+    -->
+
+    <database>
+        <!-- This Section configures the Settings for connecting to the 
+             Artifact-Database instance. e.g. SQLite -->
+        <user>SA</user>
+        <password></password>
+        <!-- For use with a postgresql database use the appropriate driver-->
+        <!--driver>org.postgresql.Driver</driver-->
+        <url>jdbc:h2:${artifacts.config.dir}/../artifactdb/artifacts.db</url>
+    </database>
+    <!-- This is the default backend db configuration. -->
+    <!--
+    <backend-database>
+        <user>flys</user>
+        <password>flys</password>
+        <dialect>org.hibernate.dialect.PostgreSQLDialect</dialect>
+        <driver>org.postgresql.Driver</driver>
+        <url>jdbc:postgresql://localhost:5432/flys</url>
+    </backend-database>
+    -->
+
+    <flys>
+        <themes>
+            <configuration>${artifacts.config.dir}/themes.xml</configuration>
+        </themes>
+    </flys>
+</artifact-database>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/datacage.sql	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,104 @@
+BEGIN;
+
+CREATE SEQUENCE USERS_ID_SEQ;
+
+CREATE TABLE users (
+    id  INT  PRIMARY KEY NOT NULL,
+    gid UUID             NOT NULL UNIQUE
+);
+
+CREATE SEQUENCE COLLECTIONS_ID_SEQ;
+
+CREATE TABLE collections (
+    id       INT  PRIMARY KEY NOT NULL,
+    gid      UUID             NOT NULL UNIQUE,
+    user_id  INT              NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    name     VARCHAR(256)     NOT NULL,
+    creation TIMESTAMP        NOT NULL
+);
+
+CREATE SEQUENCE ARTIFACTS_ID_SEQ;
+
+CREATE TABLE artifacts (
+    id       INT  PRIMARY KEY NOT NULL,
+    gid      UUID             NOT NULL UNIQUE,
+    state    VARCHAR(256)     NOT NULL,
+    creation TIMESTAMP        NOT NULL
+);
+
+CREATE SEQUENCE COLLECTION_ITEMS_ID_SEQ;
+
+CREATE TABLE collection_items (
+    id            INT PRIMARY KEY NOT NULL,
+    collection_id INT             NOT NULL REFERENCES collections(id) ON DELETE CASCADE,
+    artifact_id   INT             NOT NULL REFERENCES artifacts(id)   ON DELETE CASCADE
+);
+
+CREATE SEQUENCE ARTIFACT_DATA_ID_SEQ;
+
+CREATE TABLE artifact_data (
+    id          INT PRIMARY KEY NOT NULL,
+    artifact_id INT             NOT NULL REFERENCES artifacts(id) ON DELETE CASCADE,
+    kind        VARCHAR(256)    NOT NULL,
+    k           VARCHAR(256)    NOT NULL,
+    v           VARCHAR(256),   -- Maybe too short
+    UNIQUE (artifact_id, k)
+);
+
+CREATE SEQUENCE OUTS_ID_SEQ;
+
+CREATE TABLE outs (
+    id          INT PRIMARY KEY NOT NULL,
+    artifact_id INT             NOT NULL REFERENCES artifacts(id) ON DELETE CASCADE,
+    name        VARCHAR(256)    NOT NULL,
+    description VARCHAR(256),
+    out_type    VARCHAR(256)
+);
+
+CREATE SEQUENCE FACETS_ID_SEQ;
+
+CREATE TABLE facets (
+    id          INT PRIMARY KEY NOT NULL,
+    out_id      INT             NOT NULL REFERENCES outs(id) ON DELETE CASCADE,
+    name        VARCHAR(256)    NOT NULL,
+    num         INT             NOT NULL,
+    state       VARCHAR(256)    NOT NULL,
+    description VARCHAR(256),
+    UNIQUE (out_id, num, name)
+);
+
+CREATE VIEW master_artifacts AS
+    SELECT a2.id             AS id,
+           a2.gid            AS gid,
+           a2.state          AS state,
+           a2.creation       AS creation,
+           ci2.collection_id AS collection_id
+    FROM   collection_items ci2 
+           JOIN artifacts a2 
+             ON ci2.artifact_id = a2.id 
+           JOIN (SELECT ci.collection_id AS c_id, 
+                        MIN(a.creation)  AS oldest_a 
+                 FROM   collection_items ci 
+                        JOIN artifacts a 
+                          ON ci.artifact_id = a.id 
+                 GROUP  BY ci.collection_id) o 
+             ON o.c_id = ci2.collection_id 
+    WHERE  a2.creation = o.oldest_a;
+
+-- DROP VIEW master_artifacts;
+-- DROP SEQUENCE USERS_ID_SEQ;
+-- DROP SEQUENCE COLLECTIONS_ID_SEQ;
+-- DROP SEQUENCE ARTIFACTS_ID_SEQ;
+-- DROP SEQUENCE COLLECTION_ITEMS_ID_SEQ;
+-- DROP SEQUENCE ARTIFACT_DATA_ID_SEQ;
+-- DROP SEQUENCE OUTS_ID_SEQ;
+-- DROP SEQUENCE FACETS_ID_SEQ;
+-- DROP TABLE facets;
+-- DROP TABLE outs;
+-- DROP TABLE artifact_data;
+-- DROP TABLE collection_items;
+-- DROP TABLE collections;
+-- DROP TABLE artifacts;
+-- DROP TABLE users;
+
+COMMIT;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/mapserver/barrier_lines_class.vm	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,32 @@
+CLASS
+    NAME "Damm"
+    EXPRESSION ("[TYP]"="Damm")
+    STYLE
+        SIZE 5
+        OUTLINECOLOR "#008000"
+    END
+END
+CLASS
+    NAME "Rohr 1"
+    EXPRESSION ("[TYP]"="Rohr 1")
+    STYLE
+        SIZE 5
+        OUTLINECOLOR "#800080"
+    END
+END
+CLASS
+    NAME "Rohr 2"
+    EXPRESSION ("[TYP]"="Rohr 2")
+    STYLE
+        SIZE 5
+        OUTLINECOLOR "#808080"
+    END
+END
+CLASS
+    NAME "Graben"
+    EXPRESSION ("[TYP]"="Graben")
+    STYLE
+        SIZE 5
+        OUTLINECOLOR "#800000"
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/mapserver/barrier_polygons_class.vm	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,7 @@
+CLASS
+    NAME "POLYGON_BARRIERS"
+    STYLE
+        SIZE 5
+        OUTLINECOLOR "#FF8000"
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/mapserver/layer.vm	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,34 @@
+LAYER
+    NAME      "$LAYER.getName()"
+    TYPE      $LAYER.getType()
+    DATA      "$LAYER.getDirectory()/$LAYER.getData()"
+    STATUS    ON
+    TEMPLATE  map.html
+    TOLERANCE 10
+    DUMP      TRUE
+    #if( $LAYER.getGroup() )
+        GROUP "$LAYER.getGroup()"
+    #end
+
+    METADATA
+        "wms_title" "$LAYER.getTitle()"
+        "gml_include_items" "all"
+        #if ( $LAYER.getGroupTitle() )
+            "wms_group_title" "$LAYER.getGroupTitle()"
+        #end
+    END
+
+    #if ( !$LAYER.getStyle() )
+        #if ( $LAYER.getGroupTitle() )
+            #if ( $LAYER.getType() == "POLYGON" )
+                #include("barrier_polygons_class.vm")
+            #else
+                #include("barrier_lines_class.vm")
+            #end
+        #else
+            #include("wsplgen_class.vm")
+        #end
+    #else
+        $LAYER.getStyle()
+    #end
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/mapserver/mapfile.vm	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,43 @@
+MAP
+    NAME "FLYS-Map"
+    STATUS ON
+    SIZE 600 400
+    MAXSIZE 4000
+    EXTENT -90 -180 90 180
+    UNITS DD
+    SHAPEPATH "$SHAPEFILEPATH"
+    IMAGECOLOR 255 255 255
+    PROJECTION
+        "init=epsg:31466"
+    END
+
+    DEBUG 5
+    CONFIG "MS_ERRORFILE" "mapserver.log"
+
+    WEB
+      METADATA
+        "wms_title"             "FLYS Web Map Service"
+        "wms_onlineresource"    "$MAPSERVERURL"
+        "wms_accessconstraints" "none"
+        "wms_fees"              "none"
+        "wms_addresstype"       "postal"
+        "wms_address"           "Any Street"
+        "wms_city"              "Any City"
+        "wms_stateorprovince"   "Any state"
+        "wms_postcode"          "My Postalcode"
+        "wms_country"           "Any Country"
+        "wms_contactperson"     "Any Person"
+        "wms_contactorganization" "Any Orga"
+        "wms_contactelectronicmailaddress" "any-email@example.com"
+        "wms_contactvoicetelephone" "Any's telephone number"
+        "wms_srs" "EPSG:4326 EPSG:31466 EPSG:31467"
+        "wms_feature_info_mime_type" "text/html"
+        "ows_enable_request"   "*"
+      END
+    END
+
+    ## Don't change the following lines.
+    #foreach ($LAYER in $LAYERS)
+        $LAYER
+    #end
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/mapserver/wsplgen_class.vm	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,44 @@
+CLASS
+    NAME "WSPLGEN_POLYGON"
+    EXPRESSION ([DIFF] < 1)
+    STYLE
+        SIZE 5
+        COLOR "#B2C9D7"
+    END
+END
+
+CLASS
+    NAME "WSPLGEN_POLYGON"
+    EXPRESSION ([DIFF] >= 1 AND [DIFF] < 2)
+    STYLE
+        SIZE 5
+        COLOR "#6F93AA"
+    END
+END
+
+CLASS
+    NAME "WSPLGEN_POLYGON"
+    EXPRESSION ([DIFF] >= 2 AND [DIFF] < 3)
+    STYLE
+        SIZE 5
+        COLOR "#426F8B"
+    END
+END
+
+CLASS
+    NAME "WSPLGEN_POLYGON"
+    EXPRESSION ([DIFF] >= 3 AND [DIFF] < 4)
+    STYLE
+        SIZE 5
+        COLOR "#214F6C"
+    END
+END
+
+CLASS
+    NAME "WSPLGEN_POLYGON"
+    EXPRESSION ([DIFF] >= 3 AND [DIFF] < 4)
+    STYLE
+        SIZE 5
+        COLOR "#021B2A"
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/meta-data.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,370 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<dc:template xmlns:dc="http://www.intevation.org/2011/Datacage">
+<datacage>
+  <dc:macro name="load-system">
+    <dc:context connection="system">
+      <dc:statement>
+        SELECT id AS river_id, name as river_name FROM rivers
+        WHERE lower(name) LIKE lower(${river})
+      </dc:statement>
+      <dc:elements>
+        <river>
+          <dc:attribute name="name" value="${river_name}"/>
+          <dc:attribute name="db-id" value="${river_id}"/>
+          <dc:if test="dc:contains($artifact-outs, 'computed_discharge_curve')">
+              <discharge-table-nn>
+                <discharge-table-gauge>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id   AS gauge_id,
+                             name AS gauge_name
+                      FROM gauges WHERE river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <gauge>
+                        <dc:attribute name="name" value="${gauge_name}"/>
+                        <dc:attribute name="db-id" value="${gauge_id}"/>
+                        <dc:context>
+                          <dc:statement>
+                            SELECT description   AS gauge_desc, 
+                                   d.id          AS discharge_id,
+                                   ti.start_time AS g_start, 
+                                   ti.stop_time  AS g_stop
+                            FROM discharge_tables d JOIN time_intervals ti 
+                            ON d.time_interval_id = ti.id
+                            WHERE d.gauge_id = ${gauge_id} AND d.kind = 1
+                          </dc:statement>
+                          <dc:elements>
+                            <historical>
+                              <dc:attribute name="name" value="${gauge_desc}"/>
+                              <dc:attribute name="from" value="${g_start}"/>
+                              <dc:attribute name="to" value="${g_stop}"/>
+                              <dc:attribute name="db-id" value="${discharge_id}"/></historical>
+                          </dc:elements>
+                        </dc:context>
+                      </gauge>
+                    </dc:elements>
+                  </dc:context>
+                </discharge-table-gauge>
+                <fixations>
+                  <dc:attribute name="id" value="fixations-${river_id}"/>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id          AS fix_id,
+                             description AS fix_description
+                      FROM wsts WHERE kind = 2 AND river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <fixation>
+                        <dc:attribute name="name" value="${fix_description}"/>
+                        <dc:attribute name="db-id" value="${fix_id}"/>
+                        <columns>
+                          <dc:context>
+                            <dc:statement>
+                              SELECT id   AS fix_column_id,
+                                     name AS fix_column_name
+                              FROM wst_columns WHERE wst_id = ${fix_id}
+                              ORDER by position
+                            </dc:statement>
+                            <dc:elements>
+                              <column>
+                                <dc:attribute name="name" value="${fix_column_name}"/>
+                                <dc:attribute name="db-id" value="${fix_column_id}"/></column>
+                            </dc:elements>
+                          </dc:context>
+                        </columns>
+                      </fixation>
+                    </dc:elements>
+                  </dc:context>
+                </fixations>
+                <flood-protections>
+                  <dc:attribute name="id" value="flood-protections-${river_id}"/>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id          AS prot_id,
+                             description AS prot_description
+                      FROM wsts WHERE kind = 5 AND river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <flood-protection>
+                        <dc:attribute name="name" value="${prot_description}"/>
+                        <dc:attribute name="db-id" value="${prot_id}"/>
+                        <columns>
+                          <dc:context>
+                            <dc:statement>
+                              SELECT id   AS prot_column_id,
+                                     name AS prot_column_name
+                              FROM wst_columns WHERE wst_id = ${prot_id}
+                              ORDER by position
+                            </dc:statement>
+                            <dc:elements>
+                              <column>
+                                <dc:attribute name="name" value="${prot_column_name}"/>
+                                <dc:attribute name="db-id" value="${prot_column_id}"/></column>
+                            </dc:elements>
+                          </dc:context>
+                        </columns>
+                      </flood-protection>
+                    </dc:elements>
+                  </dc:context>
+                </flood-protections>
+                <flood-water-marks>
+                  <dc:attribute name="id" value="flood-water-marks-${river_id}"/>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id          AS fw_id,
+                             description AS fw_description
+                      FROM wsts WHERE kind = 4 AND river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <flood-water-mark>
+                        <dc:attribute name="name" value="${fw_description}"/>
+                        <dc:attribute name="db-id" value="${fw_id}"/>
+                        <columns>
+                          <dc:context>
+                            <dc:statement>
+                              SELECT id   AS fw_column_id,
+                                     name AS fw_column_name
+                              FROM wst_columns WHERE wst_id = ${fw_id}
+                              ORDER by position
+                            </dc:statement>
+                            <dc:elements>
+                              <column>
+                                <dc:attribute name="name" value="${fw_column_name}"/>
+                                <dc:attribute name="db-id" value="${fw_column_id}"/></column>
+                            </dc:elements>
+                          </dc:context>
+                        </columns>
+                      </flood-water-mark>
+                    </dc:elements>
+                  </dc:context>
+                </flood-water-marks>
+                <water-levels>
+                  <dc:attribute name="id" value="water-levels-${river_id}"/>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id          AS wl_id,
+                             description AS wl_description
+                      FROM wsts WHERE kind = 0 AND river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <water-level>
+                        <dc:attribute name="name" value="${wl_description}"/>
+                        <dc:attribute name="db-id" value="${wl_id}"/>
+                        <columns>
+                          <dc:context>
+                            <dc:statement>
+                              SELECT id   AS wl_column_id,
+                                     name AS wl_column_name
+                              FROM wst_columns WHERE wst_id = ${wl_id}
+                              ORDER by position
+                            </dc:statement>
+                            <dc:elements>
+                              <column>
+                                <dc:attribute name="name" value="${wl_column_name}"/>
+                                <dc:attribute name="db-id" value="${wl_column_id}"/></column>
+                            </dc:elements>
+                          </dc:context>
+                        </columns>
+                      </water-level>
+                    </dc:elements>
+                  </dc:context>
+                </water-levels>
+                <extra-longitudinal-sections>
+                  <dc:attribute name="id" value="extra-longitudinal-sections-${river_id}"/>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id          AS els_id,
+                             description AS els_description
+                      FROM wsts WHERE kind = 1 AND river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                      <extra-longitudinal-section>
+                        <dc:attribute name="name" value="${els_description}"/>
+                        <dc:attribute name="db-id" value="${els_id}"/>
+                        <columns>
+                          <dc:context>
+                            <dc:statement>
+                              SELECT id   AS els_column_id,
+                                     name AS els_column_name
+                              FROM wst_columns WHERE wst_id = ${els_id}
+                              ORDER by position
+                            </dc:statement>
+                            <dc:elements>
+                              <column>
+                                  <dc:attribute name="name" value="${els_column_name}"/>
+                                  <dc:attribute name="db-id" value="${els_column_id}"/></column>
+                            </dc:elements>
+                          </dc:context>
+                        </columns>
+                      </extra-longitudinal-section>
+                    </dc:elements>
+                  </dc:context>
+                </extra-longitudinal-sections>
+              </discharge-table-nn>
+          </dc:if>
+          <dc:if test="dc:contains($artifact-outs, 'computed_discharge_curve')">
+              <computed-discharge-curve>
+                <mainvalue>
+                  <dc:attribute name="factory" value="mainvalue"/>
+                  <dc:attribute name="db-ids" value="${river_id}"/>
+                </mainvalue>
+              </computed-discharge-curve>
+          </dc:if>
+          <dc:if test="dc:contains($artifact-outs, 'longitudinal_section')">
+              <longitudinal-section>
+                <dc:call-macro name="longitudinal_section-recommended"/>
+                <fixations><dc:attribute name="ref" value="fixations-${river_id}"/></fixations>
+                <flood-protections><dc:attribute name="ref" value="flood-protections-${river_id}"/></flood-protections>
+                <flood-water-marks><dc:attribute name="ref" value="flood-water-marks-${river_id}"/></flood-water-marks>
+                <water-levels><dc:attribute name="ref" value="water-levels-${river_id}"/></water-levels>
+                <extra-longitudinal-sections><dc:attribute name="ref" value="extra-longitudinal-sections-${river_id}"/></extra-longitudinal-sections>
+              </longitudinal-section>
+              <dc:macro name="longitudinal_section-recommended">
+                <annotation>
+                          <dc:attribute name="factory" value="annotations"/>
+                          <dc:attribute name="ids" value="${river_id}"/>
+                </annotation>
+              </dc:macro>
+          </dc:if>
+          <dc:if test="dc:contains($artifact-outs, 'floodmap')">
+              <floodmap>
+              <dc:choose>
+                  <dc:when test="dc:contains($parameters, 'recommended')">
+                    <dc:call-macro name="flood-map-recommended"/>
+                  </dc:when>
+                  <dc:when test="dc:contains($parameters, 'dem')">
+                    <dc:call-macro name="flood-map-dem"/>
+                  </dc:when>
+                  <dc:otherwise>
+                    <dc:call-macro name="flood-map-complete"/>
+                  </dc:otherwise>
+              </dc:choose>
+              </floodmap>
+              <dc:macro name="flood-map-recommended">
+                <dc:comment>
+                   FIXME: Following two macros look identical to me.
+                </dc:comment>
+                  <kilometrage>
+                      <riveraxis>
+                          <dc:attribute name="factory" value="riveraxis"/>
+                          <dc:attribute name="ids" value="${river_id}"/>
+                      </riveraxis>
+                  </kilometrage>
+                  <rastermap>
+                      <background>
+                          <dc:attribute name="factory" value="wmsbackground"/>
+                          <dc:attribute name="ids" value="${river_id}"/>
+                      </background>
+                  </rastermap>
+              </dc:macro>
+              <dc:macro name="flood-map-dem">
+                <dems>
+                  <dc:context>
+                    <dc:statement>
+                      SELECT id    AS dem_id,
+                             lower AS dem_lower,
+                             upper AS dem_upper
+                      FROM dem WHERE river_id = ${river_id}
+                    </dc:statement>
+                    <dc:elements>
+                        <dem>
+                          <dc:attribute name="factory" value="demfactory"/>
+                          <dc:attribute name="ids" value="${dem_id}"/>
+                          <dc:attribute name="description" value="${dem_lower}-${dem_upper}"/>
+                        </dem>
+                    </dc:elements>
+                  </dc:context>
+                </dems>
+              </dc:macro>
+              <dc:macro name="flood-map-complete">
+                  <kilometrage>
+                      <riveraxis>
+                          <dc:attribute name="factory" value="riveraxis"/>
+                          <dc:attribute name="ids" value="${river_id}"/>
+                      </riveraxis>
+                  </kilometrage>
+                  <rastermap>
+                      <background>
+                          <dc:attribute name="factory" value="wmsbackground"/>
+                          <dc:attribute name="ids" value="${river_id}"/>
+                      </background>
+                  </rastermap>
+                  <dc:call-macro name="flood-map-dem"/>
+              </dc:macro>
+          </dc:if>
+        </river>
+      </dc:elements>
+    </dc:context>
+  </dc:macro>
+
+  <dc:choose>
+    <dc:comment>
+      User specific part
+      ------------------
+    </dc:comment>
+    <dc:when test="dc:contains($parameters, 'user-id')">
+      <old_calculations>
+        <dc:context connection="user">
+          <dc:statement>SELECT u.id AS user_id, c.id AS collection_id
+                        FROM collections c JOIN users u ON c.user_id = u.id
+                        WHERE u.gid = CAST(${user-id} AS uuid)
+                        ORDER BY c.creation DESC
+          </dc:statement>
+          <dc:elements>
+            <dc:context>
+              <dc:statement>SELECT id AS a_id, state AS a_state, gid AS a_gid, creation AS a_creation
+                            FROM   master_artifacts m
+                            WHERE  collection_id = ${collection_id} AND gid &lt;&gt; CAST(${artifact-id} AS uuid)
+                                   AND EXISTS (
+                                      SELECT id FROM artifact_data WHERE artifact_id = m.id AND k = 'river' AND v = ${river})
+              </dc:statement>
+              <dc:elements>
+                <dc:choose>
+                  <dc:when test="dc:contains($artifact-outs, 'longitudinal_section')">
+                    <dc:context>
+                      <dc:statement>SELECT id AS out_id FROM outs WHERE artifact_id = ${a_id} AND name = 'longitudinal_section'
+                      </dc:statement>
+                      <dc:elements>
+                        <dc:context>
+                          <dc:statement>SELECT name AS facet_name, num as facet_num, description AS facet_description
+                                        FROM facets WHERE out_id = ${out_id} ORDER BY num ASC, name DESC
+                          </dc:statement>
+                          <longitudinal_section_columns>
+                              <dc:attribute name="description" value="${river} ${a_creation}"/>
+                              <dc:elements>
+                                <dc:element name="${facet_name}">
+                                  <dc:attribute name="description" value="${facet_description}"/>
+                                  <dc:attribute name="ids" value="${facet_num}"/>
+                                  <dc:attribute name="factory" value="winfo"/>
+                                  <dc:attribute name="artifact-id" value="${a_gid}"/>
+                                  <dc:attribute name="out" value="longitudinal_section"/>
+                                </dc:element>
+                              </dc:elements>
+                          </longitudinal_section_columns>
+                        </dc:context>
+                      </dc:elements>
+                    </dc:context>
+                  </dc:when>
+                </dc:choose>
+              </dc:elements>
+            </dc:context>
+          </dc:elements>
+        </dc:context>
+      </old_calculations>
+      <dc:comment>
+        System specific part
+        --------------------
+      </dc:comment>
+      <dc:call-macro name="load-system"/>
+    </dc:when>
+    <dc:comment>
+      System specific part only
+      -------------------------
+    </dc:comment>
+    <dc:otherwise>
+        <dc:call-macro name="load-system"/>
+    </dc:otherwise>
+  </dc:choose>
+</datacage>
+</dc:template>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/conf/themes.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,195 @@
+<themes>
+
+    <!-- Concrete themes are following now! -->
+    <theme name="DischargeCurve">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0, 0, 153"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="2" hints="h"/>
+        </fields>
+    </theme>
+
+    <!--
+        Discharge Longitudinal Section
+    -->
+    <theme name="LongitudinalSectionW">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="204, 204, 204"/>
+        </fields>
+    </theme>
+
+    <theme name="LongitudinalSectionQ">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="204, 204, 204"/>
+        </fields>
+    </theme>
+
+
+    <!--
+        Computed Discharge Curves
+    -->
+    <theme name="ComputedDischargeCurve">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0, 0, 153"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="2" hints="h"/>
+        </fields>
+    </theme>
+
+    <theme name="ComputedDischargeCurveQ">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Farbe" default="200, 0, 15"/>
+        </fields>
+    </theme>
+
+    <theme name="ComputedDischargeCurveW">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Farbe" default="0, 215, 0"/>
+        </fields>
+    </theme>
+
+    <!--
+        Cross Sections
+    -->
+    <theme name="CrossSection">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0,0,0"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="1" hints="h"/>
+        </fields>
+    </theme>
+
+    <theme name="CrossSectionWaterLine">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0,0,153"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="1" hints="h"/>
+        </fields>
+    </theme>
+
+
+    <!--
+        Duration Curves
+    -->
+    <theme name="DurationCurveW">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0,51,204"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="2" hints="h"/>
+        </fields>
+    </theme>
+
+    <theme name="DurationCurveQ">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="0,204,0"/>
+            <field name="linesize"  type="int"   display="Liniendicke" default="2" hints="h"/>
+        </fields>
+    </theme>
+
+
+    <!--
+        Discharge Longitudinal Section
+    -->
+    <theme name="DischargeLongitudinalSectionW">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="204, 204, 204"/>
+        </fields>
+    </theme>
+
+
+    <theme name="DischargeLongitudinalSectionC">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="255, 0 , 0"/>
+        </fields>
+    </theme>
+
+    <theme name="DischargeLongitudinalSectionQ">
+        <inherits>
+            <inherit from="HiddenColorLines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="204, 204, 204"/>
+        </fields>
+    </theme>
+
+
+    <!-- Virtual themes are following now! -->
+    <theme name="Lines" type="virtual">
+        <fields>
+            <field name="showlines" type="boolean" display="Linie anzeigen" default="true"/>
+            <field name="linesize"  type="int"     display="Liniendicke"    default="1"/>
+            <field name="linetype"  type="Dash"    display="Linienart"      default="new Dash()"/>
+        </fields>
+    </theme>
+
+    <theme name="ColorLines" type="virtual">
+        <inherits>
+            <inherit from="Lines"/>
+        </inherits>
+        <fields>
+            <field name="linecolor" type="Color" display="Linienfarbe" default="Color.BLACK"/>
+        </fields>
+    </theme>
+
+    <theme name="HiddenColorLines" type="virtual">
+        <inherits>
+            <inherit from="ColorLines"/>
+        </inherits>
+        <fields>
+            <field name="showlines" type="boolean" display="Linie anzeigen" default="true"        hints="h"/>
+            <field name="linesize"  type="int"     display="Liniendicke"    default="1"           hints="h"/>
+            <field name="linetype"  type="Dash"    display="Linienart"      default="new Dash()"  hints="h"/>
+        </fields>
+    </theme>
+
+
+
+    <!-- Mappings are following now. A mapping maps between a name of a facet
+         and a theme. -->
+    <mappings>
+        <mapping from="longitudinal_section.w" to="LongitudinalSectionW"/>
+        <mapping from="longitudinal_section.q" to="LongitudinalSectionQ"/>
+        <mapping from="discharge_curve.curve" to="DischargeCurve"/>
+        <mapping from="cross_section" to="CrossSection"/>
+        <mapping from="cross_section_water_line" to="CrossSectionWaterLine"/>
+        <mapping from="computed_discharge_curve.q" to="ComputedDischargeCurve"/>
+        <mapping from="duration_curve.w" to="DurationCurveW"/>
+        <mapping from="duration_curve.q" to="DurationCurveQ"/>
+        <mapping from="discharge_longitudinal_section.w" to="DischargeLongitudinalSectionW"/>
+        <mapping from="discharge_longitudinal_section.c" to="DischargeLongitudinalSectionC"/>
+        <mapping from="discharge_longitudinal_section.q" to="DischargeLongitudinalSectionQ"/>
+        <mapping from="computed_discharge_curve.mainvalues.q" to="ComputedDischargeCurveQ"/>
+        <mapping from="computed_discharge_curve.mainvalues.w" to="ComputedDischargeCurveW"/>
+    </mappings>
+</themes>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/dbconnection.include	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,2 @@
+CONNECTIONTYPE postgis
+CONNECTION "dbname='flys3' host=127.0.0.1 port=5432 user='flys' password='flys' sslmode=disable"
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/elbe-mapfile.map	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,73 @@
+MAP
+    NAME "Elbe"
+    STATUS ON
+    SIZE 600 400
+    MAXSIZE 4000
+    EXTENT 3590790.616790 5648985.748203 3868521.325854 5922665.254118
+    UNITS DD
+    #FONTSET "fontset.txt"
+    IMAGECOLOR 255 255 255
+    PROJECTION
+        "init=epsg:31466"
+    END
+
+
+    OUTPUTFORMAT
+        NAME agg
+        DRIVER AGG/PNG
+        IMAGEMODE RGB
+    END
+
+    CONFIG "MS_ERRORFILE" "logs/flys-elbe-wms.log"
+    DEBUG 5
+
+    WEB
+      METADATA
+        "wms_title"             "FLYS-3.0 WMS (ELBE)"
+        "wms_onlineresource"    "http://czech-republic.atlas.intevation.de/cgi-bin/elbe-wms"
+        "wms_accessconstraints" "none"
+        "wms_fees"              "none"
+        "wms_addresstype"       "postal"
+        "wms_address"           "Any Street"
+        "wms_city"              "Any City"
+        "wms_stateorprovince"   "Any state"
+        "wms_postcode"          "My Postalcode"
+        "wms_country"           "Any Country"
+        "wms_contactperson"     "Any Person"
+        "wms_contactorganization" "Any Orga"
+        "wms_contactelectronicmailaddress" "any-email@example.com"
+        "wms_contactvoicetelephone" "Any's telephone number"
+        "wms_srs" "EPSG:31466 EPSG:4326"
+        "wms_feature_info_mime_type" "text/html"
+        "ows_enable_request"   "*"
+      END
+    END
+
+    LAYER
+        NAME riveraxis
+        EXTENT 3590790.616790 5648985.748203 3868521.325854 5922665.254118
+        DEBUG 5
+  
+        METADATA
+            "wms_title" "River Axis"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "dbconnection.include"
+	DATA 'geom FROM "river_axes" USING UNIQUE id USING srid=31466'
+        FILTER "river_id='6'"
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "riveraxis"
+            STYLE
+                SIZE 5
+                COLOR "#000000"
+            END
+        END
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/fontset.txt	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,5 @@
+# LiberationsSans weist eine metrische Identitaet zu Arial auf und ist unter
+# einer freien Lizenz (modifizierte GPL 2) verfuegbar.
+# Quelle: http://de.wikipedia.org/wiki/Arial
+
+LiberationSans-Italic /usr/share/fonts/truetype/LiberationSans-Italic.ttf
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/mosel-mapfile.map	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,73 @@
+MAP
+    NAME "Mosel"
+    STATUS ON
+    SIZE 600 400
+    MAXSIZE 4000
+    EXTENT 2525866.883066 5480800.000000 2614283.382914 5582578.641600
+    UNITS DD
+    #FONTSET "fontset.txt"
+    IMAGECOLOR 255 255 255
+    PROJECTION
+        "init=epsg:31466"
+    END
+
+
+    OUTPUTFORMAT
+        NAME agg
+        DRIVER AGG/PNG
+        IMAGEMODE RGB
+    END
+
+    CONFIG "MS_ERRORFILE" "logs/flys-mosel-wms.log"
+    DEBUG 5
+
+    WEB
+      METADATA
+        "wms_title"             "FLYS-3.0 WMS (MOSEL)"
+        "wms_onlineresource"    "http://czech-republic.atlas.intevation.de/cgi-bin/mosel-wms"
+        "wms_accessconstraints" "none"
+        "wms_fees"              "none"
+        "wms_addresstype"       "postal"
+        "wms_address"           "Any Street"
+        "wms_city"              "Any City"
+        "wms_stateorprovince"   "Any state"
+        "wms_postcode"          "My Postalcode"
+        "wms_country"           "Any Country"
+        "wms_contactperson"     "Any Person"
+        "wms_contactorganization" "Any Orga"
+        "wms_contactelectronicmailaddress" "any-email@example.com"
+        "wms_contactvoicetelephone" "Any's telephone number"
+        "wms_srs" "EPSG:31466 EPSG:4326"
+        "wms_feature_info_mime_type" "text/html"
+        "ows_enable_request"   "*"
+      END
+    END
+
+    LAYER
+        NAME riveraxis
+        EXTENT 2525866.883066 5480800.000000 2614283.382914 5582578.641600
+        DEBUG 5
+  
+        METADATA
+            "wms_title" "River Axis"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "dbconnection.include"
+	DATA 'geom FROM "river_axes" USING UNIQUE id USING srid=31466'
+        FILTER "river_id='2'"
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "riveraxis"
+            STYLE
+                SIZE 5
+                COLOR "#000000"
+            END
+        END
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/oracle_dbconnection.include	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,2 @@
+CONNECTIONTYPE oraclespatial
+CONNECTION "flys3/flys3@localhost"
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/saar-mapfile.map	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,301 @@
+MAP
+    NAME "Saar"
+    STATUS ON
+    SIZE 600 400
+    MAXSIZE 4000
+    EXTENT 2539488.036000 5450928.892000 2575486.407000 5507352.839000
+    UNITS DD
+    FONTSET "fontset.txt"
+    SYMBOLSET './symbols/symbols.sym'
+    IMAGECOLOR 255 255 255
+    PROJECTION
+        "init=epsg:31466"
+    END
+
+
+    OUTPUTFORMAT
+        NAME agg
+        DRIVER AGG/PNG
+        IMAGEMODE RGB
+    END
+
+    CONFIG "MS_ERRORFILE" "logs/flys-saar-wms.log"
+    DEBUG 0
+
+    WEB
+      METADATA
+        "wms_title"             "FLYS-3.0 WMS (SAAR)"
+        "wms_onlineresource"    "http://czech-republic.atlas.intevation.de/cgi-bin/saar-wms"
+        "wms_accessconstraints" "none"
+        "wms_fees"              "none"
+        "wms_addresstype"       "postal"
+        "wms_address"           "Any Street"
+        "wms_city"              "Any City"
+        "wms_stateorprovince"   "Any state"
+        "wms_postcode"          "My Postalcode"
+        "wms_country"           "Any Country"
+        "wms_contactperson"     "Any Person"
+        "wms_contactorganization" "Any Orga"
+        "wms_contactelectronicmailaddress" "any-email@example.com"
+        "wms_contactvoicetelephone" "Any's telephone number"
+        "wms_srs" "EPSG:31466 EPSG:4326"
+        "wms_feature_info_mime_type" "text/html"
+        "ows_enable_request"   "*"
+      END
+    END
+
+    LAYER
+        NAME catchment 
+        EXTENT 2520667.897954 5376316.575645 2634771.191263 5508288.005707
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "catchment"
+        END
+
+        TYPE POLYGON
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM catchment USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "catchment"
+            STYLE
+                COLOR "#000080"
+                OUTLINECOLOR "#000000"
+            END
+        END
+    END
+    LAYER
+        NAME km 
+	GROUP km
+	EXTENT 2539489.068000 5450953.000500 2575482.527500 5507278.634500
+        DEBUG 0
+	DUMP TRUE
+  
+        METADATA
+            "wms_title" "km"
+        END
+
+        TYPE POINT 
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM river_axes_km USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "km"
+  	    STYLE
+             COLOR "#ff0000"
+  	     SYMBOL 'square'
+  	     SIZE 5
+  	   END
+        END
+    END
+
+    LAYER
+	NAME km_annotation 
+	GROUP km
+	EXTENT 2539489.068000 5450953.000500 2575482.527500 5507278.634500
+        DEBUG 5
+	DUMP TRUE
+  
+        METADATA
+            "wms_title" "km_annotation"
+        END
+  	
+	TYPE ANNOTATION 
+  	STATUS ON 
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM river_axes_km USING SRID 31466"
+        FILTER 'river_id=1'
+  	LABELITEM km
+
+        MAXSCALE 25000 
+
+  	CLASS 
+  	  LABEL 
+  	    ANGLE auto 
+  	    SIZE 10
+  	    COLOR "#000000" 
+  	    TYPE truetype 
+  	    FONT LiberationSans-Italic 
+	    POSITION ur
+	    OFFSET 2 2
+  	  END
+  	END 
+    END
+
+    LAYER
+        NAME buildings 
+        EXTENT 2540544.253718 5456266.217464 2567747.834199 5502557.982120
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "buildings (Bauwerke/Wehre)"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM buildings USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "buildings"
+            STYLE
+        	COLOR "#ff2222"
+            END
+        END
+    END
+    LAYER
+        NAME fixpoints 
+        EXTENT 2539388.036000 5450896.688000 2575586.296000 5507370.606000
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "fixpoints (Geodaesie/Festpunkte)"
+        END
+
+        TYPE POINT 
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM fixpoints USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "fixpoints"
+  	    STYLE
+             COLOR "#ffff00"
+  	     SYMBOL 'square'
+  	     SIZE 6
+  	   END
+        END
+    END
+    LAYER
+        NAME riveraxes
+        EXTENT 2539488.036000 5450928.892000 2575486.407000 5507352.839000
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "River Axes"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM river_axes USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "riveraxes"
+            STYLE
+       		 COLOR "#0000ff"
+            END
+        END
+    END
+    
+    LAYER
+        NAME qps
+        EXTENT 2539289.724000 5450852.896743 2576589.878311 5507289.656000
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "QPS (CrossSectionTracks)"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM cross_section_tracks USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+	MAXSCALEDENOM 100000
+
+        CLASS
+            NAME "qps"
+            STYLE
+        	COLOR "#0000ff"
+            END
+        END
+    END
+
+    LAYER
+        NAME hws 
+	EXTENT 2539778.101933 5456638.161347 2567463.841704 5500605.745332
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "HWS"
+        END
+
+        TYPE LINE
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM hws USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "hws"
+            STYLE
+        	COLOR "#ff2222" 
+            END
+        END
+    END
+    LAYER
+        NAME floodplain 
+        EXTENT 2539343.776823 5451397.340027 2576021.009478 5507230.640000
+        DEBUG 0
+  
+        METADATA
+            "wms_title" "floodplain (Hydr. Grenzen/Talaue)"
+        END
+
+        TYPE POLYGON
+        STATUS ON
+        INCLUDE "oracle_dbconnection.include"
+	DATA "GEOM FROM floodplain USING SRID 31466"
+        FILTER 'river_id=1'
+
+        PROJECTION
+            "init=epsg:31466"
+        END
+
+        CLASS
+            NAME "floodplain"
+            STYLE
+                COLOR "#800080"
+		OUTLINECOLOR "#000080"
+            END
+        END
+    END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/doc/mapserver/symbols/symbols.sym	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,22 @@
+SYMBOLSET
+SYMBOL
+  NAME 'point'
+  TYPE ELLIPSE
+  POINTS
+    1 1
+  END
+  FILLED TRUE
+END
+SYMBOL
+  NAME "square"
+  TYPE VECTOR
+  POINTS
+    0 0
+    0 1
+    1 1
+    1 0
+    0 0
+  END
+  FILLED TRUE
+END
+END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/pom.xml	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,141 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>de.intevation.flys.artifacts</groupId>
+  <artifactId>flys-artifacts</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <name>flys-artifacts</name>
+  <url>http://maven.apache.org</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <build>
+    <plugins>
+      <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>2.0.2</version>
+          <configuration>
+              <source>1.5</source>
+              <target>1.5</target>
+          </configuration>
+      </plugin>
+     </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>net.sf.ehcache</groupId>
+      <artifactId>ehcache-core</artifactId>
+      <version>2.4.2</version>
+    </dependency>
+    <dependency>
+      <groupId>jfree</groupId>
+      <artifactId>jfreechart</artifactId>
+      <version>1.0.13</version>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>trove</groupId>
+      <artifactId>trove</artifactId>
+      <version>1.1-beta-5</version>
+    </dependency>
+    <dependency>
+      <groupId>net.sf.opencsv</groupId>
+      <artifactId>opencsv</artifactId>
+      <version>2.0</version>
+    </dependency>
+    <dependency>
+      <groupId>de.intevation.bsh.artifact-database</groupId>
+      <artifactId>artifact-database</artifactId>
+      <version>1.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>de.intevation.artifacts.common</groupId>
+      <artifactId>artifacts-common</artifactId>
+      <version>1.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>de.intevation.flys</groupId>
+      <artifactId>flys-backend</artifactId>
+      <version>1.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>jfree</groupId>
+      <artifactId>jfreechart</artifactId>
+      <version>1.0.13</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-dom</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.xmlgraphics</groupId>
+      <artifactId>batik-svggen</artifactId>
+      <version>1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>com.lowagie</groupId>
+      <artifactId>itext</artifactId>
+      <version>2.1.7</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-math</artifactId>
+      <version>2.2</version>
+    </dependency>
+    <dependency>
+      <groupId>com.h2database</groupId>
+      <artifactId>h2</artifactId>
+      <version>1.3.158</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-dbcp</groupId>
+      <artifactId>commons-dbcp</artifactId>
+      <version>1.2.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.geotools</groupId>
+      <artifactId>gt-shapefile</artifactId>
+      <version>2.7.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.geotools</groupId>
+      <artifactId>gt-epsg-wkt</artifactId>
+      <version>2.7.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.geotools</groupId>
+      <artifactId>gt-geojson</artifactId>
+      <version>2.7.2</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.velocity</groupId>
+      <artifactId>velocity</artifactId>
+      <version>1.7</version>
+    </dependency>
+  </dependencies>
+  <repositories>
+    <repository>
+        <id>jboss-repo2</id>
+        <name>JBoss repo2</name>
+        <url>http://repository.jboss.org/nexus/content/groups/public/</url>
+    </repository>
+    <repository>
+      <id>gt2.repo</id>
+      <name>GeoTools2 Repository including JTS</name>
+      <url>http://download.osgeo.org/webdav/geotools</url>
+    </repository>
+  </repositories>
+</project>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/AnnotationArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,261 @@
+package de.intevation.flys.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+
+//import net.sf.ehcache.Cache;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+import de.intevation.artifactdatabase.state.State;
+import de.intevation.artifactdatabase.state.StateEngine;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.states.DefaultState;
+import de.intevation.flys.artifacts.cache.CacheFactory;
+import de.intevation.flys.artifacts.context.FLYSContext;
+import de.intevation.flys.artifacts.model.AnnotationsFactory;
+
+import de.intevation.flys.backend.SessionHolder;
+
+import de.intevation.flys.model.Annotation;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+/**
+ * Artifact to access names of Points Of Interest along a segment of a river.
+ */
+public class AnnotationArtifact extends StaticFLYSArtifact {
+
+    /** The logger for this class. */
+    private static Logger logger = Logger.getLogger(WINFOArtifact.class);
+
+    /** The name of the artifact. */
+    public static final String ARTIFACT_NAME = "annotation";
+
+    /* Name of cache. */
+    //public static final String CACHE_NAME = "annotations";
+
+    @Override
+    protected void initialize(Artifact artifact, Object context,
+            CallMeta meta) {
+        logger.debug("AnnotationArtifact.initialize, id: "
+                + artifact.identifier());
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        addData("river", flys.getData("river"));
+        /*
+        logger.debug("Could set ranges to " + 
+               AnnotationsFactory.getAnnotationsBreadth(
+                   getRiver().getName())[0]);
+        */
+
+        List<Facet> fs = new ArrayList<Facet>();
+
+        // TODO Add CallMeta (duplicate TODO in RiverAxisArtifact.java).
+        DefaultState state = (DefaultState) getCurrentState(context);
+        state.computeInit(this, hash(), context, meta, fs);
+
+        if (!fs.isEmpty()) {
+            logger.debug("Facets to add in AnnotationsArtifact.initialize .");
+            facets.put(getCurrentStateId(), fs);
+        }
+        else {
+            logger.debug("No facets to add in AnnotationsArtifact.initialize .");
+        }
+    }
+
+
+    public double[] getDistance() {
+        /** TODO In initialize(), access maximal range of river (via
+         * AnnotationFactory) instead of overriding getDistance, 
+         * important for diagram generation. */
+        return new double[] {0f, 1000f};
+    }
+
+
+    /**
+     * Create the description of this AnnotationArtifact-instance.
+     *
+     * @param data Some data.
+     * @param context The CallContext.
+     *
+     * @return the description of this artifact.
+     */
+    @Override
+    public Document describe(Document data, CallContext context) {
+        logger.debug("Describe: the current state is: " + getCurrentStateId());
+
+        if (logger.isDebugEnabled()) {
+            dumpArtifact();
+        }
+
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine stateEngine = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        Document description            = XMLUtils.newDocument();
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            description,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element root = ProtocolUtils.createRootNode(creator);
+        description.appendChild(root);
+
+        State current = getCurrentState(context);
+
+        ProtocolUtils.appendDescribeHeader(creator, root, identifier(), hash());
+        ProtocolUtils.appendState(creator, root, current);
+
+        Element name = ProtocolUtils.createArtNode(
+            creator, "name",
+            new String[] { "value" },
+            new String[] { getName() });
+
+        Element outs = ProtocolUtils.createArtNode(
+            creator, "outputmodes", null, null);
+        appendOutputModes(description, outs, context);
+
+        root.appendChild(name);
+        root.appendChild(outs);
+
+        return description;
+    }
+
+
+    /**
+     * Returns the name of the concrete artifact.
+     *
+     * @return the name of the concrete artifact.
+     */
+    public String getName() {
+        return ARTIFACT_NAME;
+    }
+
+
+    /**
+     * Append outputmode elements to given document.
+     *
+     * @param doc Document to add outputmodes to.
+     * @param outs Element to add outputmode elements to.
+     * @param context The given CallContext (mostly for internationalization).
+     */
+    //@Override
+    protected void appendOutputModes(
+        Document    doc,
+        Element     outs,
+        CallContext context)
+    {
+        List<String> stateIds = getPreviousStateIds();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine engine      = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        for (String stateId: stateIds) {
+            logger.debug("Append output modes for state: " + stateId);
+            DefaultState state = (DefaultState) engine.getState(stateId);
+
+            List<Output> list = state.getOutputs();
+            if (list == null || list.size() == 0) {
+                logger.debug("-> No output modes for this state.");
+                continue;
+            }
+
+            List<Facet>  fs = facets.get(stateId);
+            if (fs == null || fs.size() == 0) {
+                logger.debug("No facets found.");
+                continue;
+            }
+
+            logger.debug("Found " + fs.size() + " facets in previous states.");
+
+            List<Output> generated = generateOutputs(list, fs);
+
+            ProtocolUtils.appendOutputModes(doc, outs, generated);
+        }
+
+        try {
+            DefaultState cur = (DefaultState) getCurrentState(context);
+            if (cur.validate(this)) {
+                List<Output> list = cur.getOutputs();
+                if (list != null && list.size() > 0) {
+                    logger.debug(
+                        "Append output modes for state: " + cur.getID());
+
+                    List<Facet>  fs = facets.get(cur.getID());
+                    if (fs != null && fs.size() > 0) {
+                        List<Output> generated = generateOutputs(list, fs);
+
+                        logger.debug("Found " + fs.size() + " current facets.");
+                        if (!generated.isEmpty()) {
+                            ProtocolUtils.appendOutputModes(
+                                doc, outs, generated);
+                        }
+                        else{
+                            logger.debug("Cannot append output to generated document.");
+                        }
+                    }
+                    else {
+                        logger.debug("No facets found for the current state.");
+                    }
+                }
+            }
+        }
+        catch (IllegalArgumentException iae) {
+            // state is not valid, so we do not append its outputs.
+        }
+    } 
+
+
+    /**
+     * Get Annotations for Points (opposed to segments) in river in range.
+     *
+     * @return list of Annotations.
+     */
+    public List<Annotation> getAnnotations() {
+        String river = FLYSUtils.getRiver(this).getName();
+        logger.debug("Search annotations for river: " /*+ river*/);
+        //Cache cache = CacheFactory.getCache(CACHE_NAME);
+
+        List<Annotation> annotations = new ArrayList<Annotation>();
+
+        return getAnnotationsUncached(river);
+    }
+
+    /**
+     * Gets Annotations from Session/Database.
+     *
+     * @return List of Annotations fetched fresh from session/database.
+     * @see DistanceInfoService to access cached documents.
+     */
+    protected List<Annotation> getAnnotationsUncached(String river) {
+        List<Annotation> annotations = new ArrayList<Annotation>();
+        Session session = SessionHolder.acquire();
+        try {
+            annotations = AnnotationsFactory.getPointAnnotations(river);
+        } finally {session.close(); SessionHolder.release();}
+        return annotations;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/CollectionMonitor.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,96 @@
+package de.intevation.flys.artifacts;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.Hook;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.state.Output;
+
+import de.intevation.flys.artifacts.datacage.Recommendations;
+
+
+public class CollectionMonitor implements Hook {
+
+    public static final String XPATH_RESULT = "/art:result";
+
+
+    private static final Logger logger =
+        Logger.getLogger(CollectionMonitor.class);
+
+
+    @Override
+    public void setup(Node cfg) {
+    }
+
+
+    @Override
+    public void execute(Artifact artifact, CallContext context, Document doc) {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        Element result = (Element) XMLUtils.xpath(
+            doc,
+            XPATH_RESULT,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        ElementCreator creator = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element recommended = creator.create("recommended-artifacts");
+        result.appendChild(recommended);
+
+        String[] outs              = extractOutputNames(flys, context);
+        Map<String, Object> params = getNoneUserSpecificParameters(flys, context);
+
+        Recommendations rec = Recommendations.getInstance();
+        rec.recommend(flys, null, outs, params, recommended);
+    }
+
+
+    public static String[] extractOutputNames(
+        FLYSArtifact flys,
+        CallContext  context)
+    {
+        List<Output> outs = flys.getCurrentOutputs(context);
+
+        int num = outs == null ? 0 : outs.size();
+
+        String[] names = new String[num];
+
+        for (int i = 0; i < num; i++) {
+            names[i] = outs.get(i).getName();
+        }
+
+        return names;
+    }
+
+
+    protected Map<String, Object> getNoneUserSpecificParameters(
+        FLYSArtifact flys,
+        CallContext  context)
+    {
+        Map<String, Object> params = new HashMap<String, Object>(1);
+        params.put("recommended", "true");
+
+        return params;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,959 @@
+package de.intevation.flys.artifacts;
+
+import de.intevation.artifactdatabase.ArtifactDatabaseImpl;
+import de.intevation.artifactdatabase.DefaultArtifact;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.DefaultOutput;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+import de.intevation.artifactdatabase.state.State;
+import de.intevation.artifactdatabase.state.StateEngine;
+
+import de.intevation.artifactdatabase.transition.TransitionEngine;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+import de.intevation.artifacts.ArtifactFactory;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.cache.CacheFactory;
+
+import de.intevation.flys.artifacts.context.FLYSContext;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+import de.intevation.flys.artifacts.states.DefaultState;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+import javax.xml.xpath.XPathConstants;
+
+import net.sf.ehcache.Cache;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
+/**
+ * The defaul FLYS artifact.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class FLYSArtifact extends DefaultArtifact {
+
+    /** The logger that is used in this artifact.*/
+    private static Logger logger = Logger.getLogger(FLYSArtifact.class);
+
+
+    public static final String COMPUTING_CACHE = "computed.values";
+
+    /** The XPath that points to the input data elements of the FEED document.*/
+    public static final String XPATH_FEED_INPUT =
+        "/art:action/art:data/art:input";
+
+    /** The XPath that points to the name of the target state of ADVANCE.*/
+    public static final String XPATH_ADVANCE_TARGET =
+        "/art:action/art:target/@art:name";
+
+    public static final String XPATH_MODEL_ARTIFACT =
+        "/art:action/art:template/@uuid";
+
+    public static final String XPATH_FILTER =
+        "/art:action/art:filter/art:out";
+
+    /** The constant string that shows that an operation was successful.*/
+    public static final String OPERATION_SUCCESSFUL = "SUCCESS";
+
+    /** The constant string that shows that an operation failed.*/
+    public static final String OPERATION_FAILED = "FAILURE";
+
+
+    /** The identifier of the current state. */
+    protected String currentStateId;
+
+    /** The identifiers of previous states on a stack.*/
+    protected List<String> previousStateIds;
+
+    /** The name of the artifact.*/
+    protected String name;
+
+    /** The data that have been inserted into this artifact.*/
+    protected Map<String, StateData> data;
+
+    /** The list of facets supported by this artifact.*/
+    protected Map<String, List<Facet>> facets;
+
+    /** out -&gt; facets */
+    protected Map<String, List<Facet>> filterFacets;
+
+
+    /**
+     * The default constructor that creates an empty FLYSArtifact.
+     */
+    public FLYSArtifact() {
+        data             = new TreeMap<String, StateData>();
+        previousStateIds = new ArrayList<String>();
+        facets           = new HashMap<String, List<Facet>>();
+    }
+
+
+    /**
+     * Returns the name of the concrete artifact.
+     *
+     * @return the name of the concrete artifact.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Returns the FLYSContext from context object.
+     *
+     * @param context The CallContext or the FLYSContext.
+     *
+     * @return the FLYSContext.
+     */
+    protected static FLYSContext getFlysContext(Object context) {
+        return context instanceof FLYSContext
+            ? (FLYSContext) context
+            : (FLYSContext) ((CallContext) context).globalContext();
+    }
+
+
+    /**
+     * Initialize the artifact and insert new data if <code>data</code> contains
+     * information necessary for this artifact.
+     *
+     * @param identifier The UUID.
+     * @param factory The factory that is used to create this artifact.
+     * @param context The CallContext.
+     * @param data Some optional data.
+     */
+    @Override
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        logger.debug("Setup this artifact with the uuid: " + identifier);
+
+        super.setup(identifier, factory, context, callMeta, data);
+
+        FLYSContext flysContext = getFlysContext(context);
+
+        List<State> states = getStates(context);
+
+        String name = getName();
+        logger.debug("Set initial state for artifact '" + name + "'");
+
+        setCurrentState(states.get(0));
+
+        String model = XMLUtils.xpathString(
+            data,
+            XPATH_MODEL_ARTIFACT,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (model != null && model.length() > 0) {
+            ArtifactDatabase db = (ArtifactDatabase) flysContext.get(
+                ArtifactDatabaseImpl.GLOBAL_CONTEXT_KEY);
+
+            try {
+                initialize(db.getRawArtifact(model), context, callMeta);
+            }
+            catch (ArtifactDatabaseException adbe) {
+                logger.error(adbe, adbe);
+            }
+        }
+
+        filterFacets = buildFilterFacets(data);
+    }
+
+    protected List<String> clonePreviousStateIds() {
+        return new ArrayList<String>(previousStateIds);
+    }
+
+    protected Map<String, StateData> cloneData() {
+        Map<String, StateData> copy = new TreeMap<String, StateData>();
+
+        for (Map.Entry<String, StateData> entry: data.entrySet()) {
+            copy.put(entry.getKey(), entry.getValue().deepCopy());
+        }
+
+        return copy;
+    }
+
+    protected Map<String, List<Facet>> cloneFacets() {
+        Map copy = new HashMap<String, List<Facet>>();
+
+        for (Map.Entry<String, List<Facet>> entry: facets.entrySet()) {
+            List<Facet> facets      = entry.getValue();
+            List<Facet> facetCopies = new ArrayList<Facet>(facets.size());
+            for (Facet facet: facets) {
+                facetCopies.add(facet.deepCopy());
+            }
+            copy.put(entry.getKey(), facetCopies);
+        }
+
+        return copy;
+    }
+
+    protected void initialize(
+        Artifact artifact,
+        Object   context,
+        CallMeta callMeta)
+    {
+        if (!(artifact instanceof FLYSArtifact)) {
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact)artifact;
+
+        currentStateId   = flys.currentStateId;
+        previousStateIds = flys.clonePreviousStateIds();
+        name             = flys.name;
+        data             = flys.cloneData();
+        facets           = flys.cloneFacets();
+        // Do not clone filter facets!
+    }
+
+    protected Map<String, List<Facet>> buildFilterFacets(Document document) {
+
+        NodeList nodes = (NodeList)XMLUtils.xpath(
+            document,
+            XPATH_FILTER,
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (nodes == null || nodes.getLength() == 0) {
+            return null;
+        }
+
+        Map<String, List<Facet>> result = new HashMap<String, List<Facet>>();
+
+        for (int i = 0, N = nodes.getLength(); i < N; ++i) {
+            Element element = (Element)nodes.item(i);
+            String oName = element.getAttribute("name");
+            if (oName.length() == 0) {
+                continue;
+            }
+
+            List<Facet> facets = new ArrayList<Facet>();
+
+            NodeList facetNodes = element.getElementsByTagNameNS(
+                ArtifactNamespaceContext.NAMESPACE_URI,
+                "facet");
+
+            for (int j = 0, M = facetNodes.getLength(); j < M; ++j) {
+                Element facetElement = (Element)facetNodes.item(j);
+
+                String fName = facetElement.getAttribute("name");
+
+                int index;
+                try {
+                    index = Integer.parseInt(facetElement.getAttribute("index"));
+                }
+                catch (NumberFormatException nfe) {
+                    logger.warn(nfe);
+                    index = 0;
+                }
+                facets.add(new DefaultFacet(index, fName, ""));
+            }
+
+            if (!facets.isEmpty()) {
+                result.put(oName, facets);
+            }
+        }
+
+        return result;
+    }
+
+
+    /**
+     * Insert new data included in <code>input</code> into the current state.
+     *
+     * @param target XML document that contains new data.
+     * @param context The CallContext.
+     *
+     * @return a document that contains a SUCCESS or FAILURE message.
+     */
+    @Override
+    public Document feed(Document target, CallContext context) {
+        logger.info("FLYSArtifact.feed()");
+
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element result = creator.create("result");
+        doc.appendChild(result);
+
+        try {
+            saveData(target, XPATH_FEED_INPUT, context);
+
+            compute(context, ComputeType.FEED, true);
+
+            return describe(target, context);
+        }
+        catch (IllegalArgumentException iae) {
+            // do not store state if validation fails.
+            context.afterCall(CallContext.NOTHING);
+            creator.addAttr(result, "type", OPERATION_FAILED, true);
+
+            result.setTextContent(iae.getMessage());
+        }
+
+        return doc;
+    }
+
+
+    /**
+     * This method handles request for changing the current state of an
+     * artifact. It is possible to step forward or backward.
+     *
+     * @param target The incoming ADVANCE document.
+     * @param context The CallContext.
+     *
+     * @return a document that contains a SUCCESS or FAILURE message.
+     */
+    public Document advance(Document target, CallContext context) {
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element result = ec.create("result");
+
+        String targetState = XMLUtils.xpathString(
+            target, XPATH_ADVANCE_TARGET, ArtifactNamespaceContext.INSTANCE);
+
+        logger.info("FLYSArtifact.advance() to '" + targetState + "'");
+
+        if (isStateReachable(targetState, context)) {
+            logger.info("Advance: Step forward");
+
+            List<String> prev = getPreviousStateIds();
+            prev.add(getCurrentStateId());
+
+            setCurrentStateId(targetState);
+
+            logger.debug("Compute data for state: " + targetState);
+            compute(context, ComputeType.ADVANCE, true);
+
+            return describe(target, context);
+        }
+        else if (isPreviousState(targetState, context)) {
+            logger.info("Advance: Step back to");
+
+            List<String> prevs   = getPreviousStateIds();
+            int targetIdx        = prevs.indexOf(targetState);
+            int start            = prevs.size() - 1;
+
+            destroyStates(prevs, context);
+
+            for (int i = start; i >= targetIdx; i--) {
+                String prev = prevs.get(i);
+                logger.debug("Remove state id '" + prev + "'");
+
+                prevs.remove(prev);
+                facets.remove(prev);
+            }
+
+            destroyState(getCurrentStateId(), context);
+            setCurrentStateId(targetState);
+
+            return describe(target, context);
+        }
+
+        logger.warn("Advance: Cannot advance to '" + targetState + "'");
+        ec.addAttr(result, "type", OPERATION_FAILED, true);
+
+        doc.appendChild(result);
+
+        return doc;
+    }
+
+
+    /**
+     * Returns the identifier of the current state.
+     *
+     * @return the identifier of the current state.
+     */
+    public String getCurrentStateId() {
+        return currentStateId;
+    }
+
+
+    /**
+     * Sets the identifier of the current state.
+     *
+     * @param id the identifier of a state.
+     */
+    protected void setCurrentStateId(String id) {
+        currentStateId = id;
+    }
+
+
+    /**
+     * Set the current state of this artifact. <b>NOTE</b>We don't store the
+     * State object itself - which is not necessary - but its identifier. So
+     * this method will just call the setCurrentStateId() method with the
+     * identifier of <i>state</i>.
+     *
+     * @param state The new current state.
+     */
+    protected void setCurrentState(State state) {
+        setCurrentStateId(state.getID());
+    }
+
+
+    /**
+     * Returns the current state of the artifact.
+     *
+     * @return the current State of the artifact.
+     */
+    protected State getCurrentState(Object context) {
+        return getState(context, getCurrentStateId());
+    }
+
+
+    /**
+     * Get list of existant states for this Artifact.
+     * @param context Contex to get StateEngine from.
+     * @return list of states.
+     */
+    protected List<State> getStates(Object context) {
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine engine      = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+        return engine.getStates(getName());
+    }
+
+
+    /**
+     * Get state with given ID.
+     * @param context Context to get StateEngine from.
+     * @param stateID ID of state to get.
+     * @return state with given ID.
+     */
+    protected State getState(Object context, String stateID) {
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine engine      = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+        return engine.getState(stateID);
+    }
+
+
+    /**
+     * Returns the vector of previous state identifiers.
+     *
+     * @return the vector of previous state identifiers.
+     */
+    protected List<String> getPreviousStateIds() {
+        return previousStateIds;
+    }
+
+
+    /**
+     * Adds a new StateData item to the data pool of this artifact.
+     *
+     * @param name the name of the data object.
+     * @param data the data object itself.
+     */
+    protected void addData(String name, StateData data) {
+        this.data.put(name, data);
+    }
+
+
+    /**
+     * This method returns a specific StateData object that is stored in the
+     * data pool of this artifact.
+     *
+     * @param name The name of the data object.
+     *
+     * @return the StateData object if existing, otherwise null.
+     */
+    public StateData getData(String name) {
+        return data.get(name);
+    }
+
+
+    public String getDataAsString(String name) {
+        StateData data = getData(name);
+        return data != null ? (String) data.getValue() : null;
+    }
+
+    public Collection<StateData> getAllData() {
+        return data.values();
+    }
+
+
+    public Facet getNativeFacet(Facet facet) {
+        String name  = facet.getName();
+        int    index = facet.getIndex();
+
+        for (Map.Entry<String, List<Facet>> entry: facets.entrySet()) {
+            for (Facet f: entry.getValue()) {
+                if (f.getIndex() == index && f.getName().equals(name)) {
+                    return f;
+                }
+            }
+        }
+
+        logger.warn("Could not find facet: " + name + " at " + index);
+        return null;
+    }
+
+
+    /**
+     * This method stores the data that is contained in the FEED document.
+     *
+     * @param feed The FEED document.
+     * @param xpath The XPath that points to the data nodes.
+     */
+    public void saveData(Document feed, String xpath, CallContext context)
+    throws IllegalArgumentException
+    {
+        if (feed == null || xpath == null || xpath.length() == 0) {
+            throw new IllegalArgumentException("error_feed_no_data");
+        }
+
+        NodeList nodes = (NodeList) XMLUtils.xpath(
+            feed,
+            xpath,
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (nodes == null || nodes.getLength() == 0) {
+            throw new IllegalArgumentException("error_feed_no_data");
+        }
+
+        int count = nodes.getLength();
+        logger.debug("Try to save " + count + " data items.");
+
+        String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+        DefaultState current = (DefaultState) getCurrentState(context);
+
+        for (int i = 0; i < count; i++) {
+            Element node = (Element)nodes.item(i);
+
+            String name  = node.getAttributeNS(uri, "name");
+            String value = node.getAttributeNS(uri, "value");
+
+            if (name.length() > 0 && value.length() > 0) {
+                logger.debug("Save data item for '" + name + "' : " + value);
+
+                addData(name, current.transform(this, context, name, value));
+            }
+        }
+
+        current.validate(this);
+    }
+
+
+    /**
+     * Determines if the state with the identifier <i>stateId</i> is reachable
+     * from the current state. The determination itself takes place in the
+     * TransitionEngine.
+     *
+     * @param stateId The identifier of a state.
+     * @param context The context object.
+     *
+     * @return true, if the state specified by <i>stateId</i> is reacahble,
+     * otherwise false.
+     */
+    protected boolean isStateReachable(String stateId, Object context) {
+        logger.debug("Determine if the state '" + stateId + "' is reachable.");
+
+        FLYSContext flysContext = getFlysContext(context);
+
+        State currentState  = getCurrentState(context);
+        StateEngine sEngine = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        TransitionEngine tEngine = (TransitionEngine) flysContext.get(
+            FLYSContext.TRANSITION_ENGINE_KEY);
+
+        return tEngine.isStateReachable(this, stateId, currentState, sEngine);
+    }
+
+
+    /**
+     * Determines if the state with the identifier <i>stateId</i> is a previous
+     * state of the current state.
+     *
+     * @param stateId The target state identifier.
+     * @param context The context object.
+     */
+    protected boolean isPreviousState(String stateId, Object context) {
+        logger.debug("Determine if the state '" + stateId + "' is old.");
+
+        List<String> prevs = getPreviousStateIds();
+        if (prevs.contains(stateId)) {
+            return true;
+        }
+
+        return false;
+    }
+
+
+    /**
+     * Computes the hash code of the entered values.
+     *
+     * @return a hash code.
+     */
+    @Override
+    public String hash() {
+        Set<Map.Entry<String, StateData>> entries = data.entrySet();
+
+        long hash  = 0L;
+        int  shift = 3;
+
+        for (Map.Entry<String, StateData> entry: entries) {
+            String key   = entry.getKey();
+            Object value = entry.getValue().getValue();
+
+            hash ^= ((long)key.hashCode() << shift)
+                 |  ((long)value.hashCode() << (shift + 3));
+            shift += 2;
+        }
+
+        return getCurrentStateId() + hash;
+    }
+
+    protected List<Output> filterOutputs(List<Output> outs) {
+
+        if (filterFacets == null || filterFacets.isEmpty()) {
+            return outs;
+        }
+
+        List<Output> filtered = new ArrayList<Output>();
+
+        for (Output out: outs) {
+
+            List<Facet> fFacets = filterFacets.get(out.getName());
+            if (fFacets != null) {
+
+                List<Facet> resultFacets = new ArrayList<Facet>();
+
+                for (Facet facet: out.getFacets()) {
+                    for (Facet fFacet: fFacets) {
+                        if (facet.getIndex() == fFacet.getIndex()
+                        &&  facet.getName().equals(fFacet.getName())) {
+                            resultFacets.add(facet);
+                            break;
+                        }
+                    }
+                }
+
+                if (!resultFacets.isEmpty()) {
+                    DefaultOutput nout = new DefaultOutput(
+                        out.getName(),
+                        out.getDescription(),
+                        out.getMimeType(),
+                        resultFacets);
+                    filtered.add(nout);
+                }
+            }
+        }
+
+        return filtered;
+    }
+
+
+    public List<Output> getOutputs(Object context) {
+        List<String> stateIds  = getPreviousStateIds();
+        List<Output> generated = new ArrayList<Output>();
+
+        for (String stateId: stateIds) {
+            DefaultState state = (DefaultState) getState(context, stateId);
+            generated.addAll(getOutputForState(state));
+        }
+
+        generated.addAll(getCurrentOutputs(context));
+
+        return filterOutputs(generated);
+    }
+
+
+    public List<Output> getCurrentOutputs(Object context) {
+        DefaultState cur = (DefaultState) getCurrentState(context);
+
+        try {
+            if (cur.validate(this)) {
+                return getOutputForState(cur);
+            }
+        }
+        catch (IllegalArgumentException iae) { }
+
+        return new ArrayList<Output>();
+    }
+
+
+    protected List<Output> getOutputForState(DefaultState state) {
+        List<Output> list = state.getOutputs();
+        if (list == null || list.size() == 0) {
+            logger.debug("-> No output modes for this state.");
+            return new ArrayList<Output>();
+        }
+
+        List<Facet>  fs = facets.get(state.getID());
+        if (fs == null || fs.size() == 0) {
+            logger.debug("No facets found.");
+            return new ArrayList<Output>();
+        }
+
+        return generateOutputs(list, fs);
+    }
+
+
+    protected List<Output> generateOutputs(List<Output> list, List<Facet> fs) {
+        List<Output> generated = new ArrayList<Output>();
+
+        boolean debug = logger.isDebugEnabled();
+
+        for (Output out: list) {
+            Output o = new DefaultOutput(
+                out.getName(),
+                out.getDescription(),
+                out.getMimeType(),
+                out.getType());
+
+            Set<String> outTypes = new HashSet<String>();
+
+            for (Facet f: out.getFacets()) {
+                if (outTypes.add(f.getName()) && debug) {
+                    logger.debug("configured facet " + f);
+                }
+            }
+
+            boolean facetAdded = false;
+            for (Facet f: fs) {
+                String type = f.getName();
+
+                if (outTypes.contains(type)) {
+                    if (debug) {
+                        logger.debug("Add facet " + f);
+                    }
+                    facetAdded = true;
+                    o.addFacet(f);
+                }
+            }
+
+            if (facetAdded) {
+                generated.add(o);
+            }
+        }
+
+        return generated;
+    }
+
+
+    /**
+     * Dispatches the computation request to compute(CallContext context, String
+     * hash) with the current hash value of the artifact which is provided by
+     * hash().
+     *
+     * @param context The CallContext.
+     */
+    public Object compute(
+        CallContext context,
+        ComputeType type,
+        boolean     generateFacets
+    ) {
+        return compute(context, hash(), type, generateFacets);
+    }
+
+
+    /**
+     * Dispatches computation requests to the current state which needs to
+     * implement a createComputeCallback(String hash, FLYSArtifact artifact)
+     * method.
+     *
+     * @param context The CallContext.
+     * @param hash The hash value which is used to fetch computed data from
+     * cache.
+     *
+     * @return the computed data.
+     */
+    public Object compute(
+        CallContext context,
+        String      hash,
+        ComputeType type,
+        boolean     generateFacets
+    ) {
+        DefaultState current = (DefaultState) getCurrentState(context);
+        return compute(context, hash, current, type, generateFacets);
+    }
+
+    public Object compute(
+        CallContext context,
+        String      hash,
+        String      stateID,
+        ComputeType type,
+        boolean     generateFacets
+    ) {
+        DefaultState current = stateID == null
+            ? (DefaultState)getCurrentState(context)
+            : (DefaultState)getState(context, stateID);
+
+        if (hash == null) {
+            hash = hash();
+        }
+
+        return compute(context, hash, current, type, generateFacets);
+    }
+
+
+    /**
+     * @param key key of state
+     * @param state state
+     * @param type Type of compute
+     * @param generateFacets Whether new facets shall be generated.
+     */
+    public Object compute(
+        CallContext   context,
+        String        key,
+        DefaultState  state,
+        ComputeType   type,
+        boolean       generateFacets
+    ) {
+        String stateID = state.getID();
+
+        List<Facet> fs = (generateFacets) ? new ArrayList<Facet>() : null;
+
+        try {
+            Cache cache = CacheFactory.getCache(COMPUTING_CACHE);
+
+            Object old = null;
+
+            if (cache != null) {
+                net.sf.ehcache.Element element = cache.get(key);
+                if (element != null) {
+                    logger.debug("Got computation result from cache.");
+                    old = element.getValue();
+                }
+            }
+
+            Object res;
+            switch (type) {
+                case FEED:
+                    res = state.computeFeed(this, key, context, fs, old);
+                    break;
+                case ADVANCE:
+                    res = state.computeAdvance(this, key, context, fs, old);
+                    break;
+                case INIT:
+                    res = state.computeInit(this, key, context, context.getMeta(), fs);
+                default:
+                    res = null;
+            }
+
+            if (cache != null && old != res && res != null) {
+                logger.debug("Store computation result to cache.");
+                net.sf.ehcache.Element element =
+                    new net.sf.ehcache.Element(key, res);
+                cache.put(element);
+            }
+
+            return res;
+        }
+        finally {
+            if (generateFacets) {
+                if (fs.isEmpty()) {
+                    facets.remove(stateID);
+                }
+                else {
+                    facets.put(stateID, fs);
+                }
+            }
+        }
+    }
+
+
+    /**
+     * Method to dump the artifacts state/data.
+     */
+    protected void dumpArtifact() {
+        if (logger.isDebugEnabled()) {
+            logger.debug("++++++++++++++ DUMP ARTIFACT DATA +++++++++++++++++");
+
+            logger.debug("------ DUMP DATA ------");
+            Collection<StateData> allData = data.values();
+
+            for (StateData d: allData) {
+                String name  = d.getName();
+                String value = (String) d.getValue();
+
+                logger.debug("- " + name + ": " + value);
+            }
+
+            logger.debug("------ DUMP PREVIOUS STATES ------");
+            List<String> stateIds = getPreviousStateIds();
+
+            for (String id: stateIds) {
+                logger.debug("- State: " + id);
+            }
+
+            logger.debug("CURRENT STATE: " + getCurrentStateId());
+
+            logger.debug("++++++++++++++ END ARTIFACT DUMP +++++++++++++++++");
+        }
+    }
+
+
+    protected void destroyState(String id, Object context) {
+        State s = getState(context, id);
+        s.endOfLife(this, context);
+    }
+
+
+    /**
+     * Calls endOfLife() for each state in the list <i>ids</i>.
+     *
+     * @param ids The State IDs that should be destroyed.
+     * @param context The FLYSContext.
+     */
+    protected void destroyStates(List<String> ids, Object context) {
+        for (int i = 0, num = ids.size(); i < num; i++) {
+            destroyState(ids.get(i), context);
+        }
+    }
+
+
+    @Override
+    public void endOfLife(Object context) {
+        logger.info("FLYSArtifact.endOfLife: " + identifier());
+
+        List<String> ids = getPreviousStateIds();
+        ids.add(getCurrentStateId());
+
+        destroyStates(ids, context);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/MainValuesArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,252 @@
+package de.intevation.flys.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.DefaultOutput;
+import de.intevation.artifactdatabase.state.State;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactFactory;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.MainValue;
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.model.Calculation;
+import de.intevation.flys.artifacts.model.MainValuesQFacet;
+import de.intevation.flys.artifacts.model.MainValuesWFacet;
+import de.intevation.flys.artifacts.model.NamedDouble;
+import de.intevation.flys.artifacts.model.WstValueTable;
+import de.intevation.flys.artifacts.model.WstValueTableFactory;
+
+import de.intevation.flys.artifacts.states.StaticState;
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * Artifact to access names of Points Of Interest along a segment of a river.
+ * This artifact neglects (Static)FLYSArtifacts capabilities of interaction
+ * with the StateEngine by overriding the getState*-methods.
+ */
+public class MainValuesArtifact
+extends      StaticFLYSArtifact
+{
+    /** The logger for this class. */
+    private static Logger logger = Logger.getLogger(MainValuesArtifact.class);
+
+    /** The name of the artifact. */
+    public static final String ARTIFACT_NAME = "mainvalue";
+
+    /** One and only state to be in. */
+    protected transient State state = null;
+
+
+    /**
+     * Trivial Constructor.
+     */
+    public MainValuesArtifact() {
+        logger.debug("MainValuesArtifact.MainValuesartifact()");
+    }
+
+
+    /**
+     * Gets called from factory, to set things up.
+     */
+    @Override
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        logger.debug("MainValuesArtifact.setup");
+        state = new StaticState("state.mainvalue.static", "state.mainvalue.static");
+        List<Facet> fs = new ArrayList<Facet>();
+        Facet qfacet = new MainValuesQFacet(Resources.getMsg(callMeta,
+                   "facet.discharge_curves.mainvalues.q",
+                   "facet.discharge_curves.mainvalues.q"));
+        Facet wfacet = new MainValuesWFacet(Resources.getMsg(callMeta,
+                   "facet.discharge_curves.mainvalues.w",
+                   "facet.discharge_curves.mainvalues.w"));
+        fs.add(qfacet);
+        fs.add(wfacet);
+        facets.put(state.getID(), fs);
+        spawnState();
+        super.setup(identifier, factory, context, callMeta, data);
+    }
+
+    protected State spawnState() {
+        state = new StaticState("state.mainvalue.static", "state.mainvalue.static");
+        List<Facet> fs = (List<Facet>) facets.get("state.mainvalue.static");
+        DefaultOutput mainValuesOutput2 = new DefaultOutput(
+                    "computed_discharge_curve",
+                    "output.computed_discharge_curve", "image/png",
+                    fs,
+                    "chart");
+
+        state.getOutputs().add(mainValuesOutput2);
+        return state;
+    }
+
+
+    @Override
+    protected void initialize(Artifact artifact, Object context, CallMeta meta) {
+        logger.debug("MainValuesArtifact.initialize");
+        WINFOArtifact winfo = (WINFOArtifact) artifact;
+        double location = FLYSUtils.getLocations(winfo)[0];
+        addData("location", new DefaultStateData("location", null, null,
+                    String.valueOf(location)));
+        addData("river", winfo.getData("river"));
+    }
+
+
+    /**
+     * Get a list containing the one and only State.
+     * @param  context ignored.
+     * @return list with one and only state.
+     */
+    @Override
+    protected List<State> getStates(Object context) {
+        ArrayList<State> states = new ArrayList<State>();
+        states.add(getState());
+        return states;
+    }
+
+
+    /**
+     * Get the "current" state.
+     * @param cc ignored.
+     * @return the "current" state.
+     */
+    @Override
+    protected State getCurrentState(Object cc) {
+        return getState();
+    }
+
+
+    /**
+     * Get the only possible state.
+     * @return the state.
+     */
+    protected State getState() {
+        return getState(null, null);
+    }
+
+
+    /**
+     * Get the state.
+     * @param context ignored.
+     * @param stateID ignored.
+     * @return the state.
+     */
+    @Override
+    protected State getState(Object context, String stateID) {
+        if (state != null)
+            return state;
+        else
+            return spawnState();
+    }
+
+
+    /**
+     * Access the Gauge that the mainvalues are taken from.
+     * @return Gauge that main values are taken from or null in case of
+     *         invalid parameterization.
+     */
+    protected Gauge getGauge() {
+        River river = FLYSUtils.getRiver(this);
+
+        if (river == null) {
+            return null;
+        }
+
+        double location = Double.parseDouble(
+                getDataAsString("location"));
+
+        return river.determineGaugeByPosition(location);
+    }
+
+
+    /**
+     * Get current location.
+     * @return the location.
+     */
+    public double getLocation() {
+        double location = Double.parseDouble(
+                (String)getData("location").getValue());
+        return location;
+    }
+
+
+    /**
+     * Get a list of "Q" main values.
+     * @return list of Q main values.
+     */
+    public List<NamedDouble> getMainValuesQ() {
+        List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
+        Gauge gauge = getGauge();
+        WstValueTable interpolator = WstValueTableFactory.getTable(FLYSUtils.getRiver(this));
+        Calculation c = new Calculation();
+        double w_out[] = {0.0f};
+        double q_out[] = {0.0f};
+        double kms[] = {getLocation()};
+        double gaugeStation = gauge.getStation().doubleValue();
+        if (gauge != null) {
+            List<MainValue> orig = gauge.getMainValues();
+            for (MainValue mv : orig) {
+                if (mv.getMainValue().getType().getName().equals("Q")) {
+                    interpolator.interpolate(mv.getValue().doubleValue(),
+                            gaugeStation, kms, w_out, q_out, c);
+                    filteredList.add(new NamedDouble(
+                                mv.getMainValue().getName(),
+                                q_out[0]
+                                ));
+                }
+            }
+        }
+        return filteredList;
+    }
+
+
+    /**
+     * Get a list of "W" main values.
+     * @return list of W main values.
+     */
+    public List<NamedDouble> getMainValuesW() {
+        List<NamedDouble> filteredList = new ArrayList<NamedDouble>();
+        Gauge gauge = getGauge();
+        WstValueTable interpolator = WstValueTableFactory.getTable(FLYSUtils.getRiver(this));
+        Calculation c = new Calculation();
+        double gaugeStation = gauge.getStation().doubleValue();
+        double w_out[] = {0.0f};
+        double q_out[] = {0.0f};
+        double kms[] = {getLocation()};
+        if (gauge != null) {
+            List<MainValue> orig = gauge.getMainValues();
+            for (MainValue mv : orig) {
+                // We cannot interpolate the W values, so derive them
+                // from given Q values.
+                if (mv.getMainValue().getType().getName().equals("Q")) {
+                    interpolator.interpolate(mv.getValue().doubleValue(),
+                            gaugeStation, kms, w_out, q_out, c);
+                    filteredList.add(new NamedDouble(
+                                "W(" + mv.getMainValue().getName() +")",
+                                w_out[0]
+                                ));
+                }
+            }
+        }
+        return filteredList;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/RiverAxisArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,100 @@
+package de.intevation.flys.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactFactory;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.artifacts.states.DefaultState;
+
+
+public class RiverAxisArtifact extends StaticFLYSArtifact {
+
+    public static final String NAME = "riveraxis";
+
+    public static final String XPATH_IDS = "/art:action/art:ids/@value";
+
+
+    private static final Logger logger =
+        Logger.getLogger(RiverAxisArtifact.class);
+
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+
+    @Override
+    public void setup(
+        String          identifier,
+        ArtifactFactory factory,
+        Object          context,
+        CallMeta        callMeta,
+        Document        data)
+    {
+        logger.debug("RiverAxisArtifact.setup");
+
+        super.setup(identifier, factory, context, callMeta, data);
+
+        String ids = XMLUtils.xpathString(
+            data, XPATH_IDS, ArtifactNamespaceContext.INSTANCE);
+
+        String[] splitted = ids != null ? ids.split(" ") : null;
+
+        if (splitted != null && splitted.length > 0) {
+            try {
+                int   river_id = Integer.parseInt(splitted[0]);
+                River river    = RiverFactory.getRiver(river_id);
+
+                if (river == null) {
+                    throw new IllegalArgumentException(
+                        "No river found for id: " + river_id);
+                }
+
+                String name = river.getName();
+
+                addData("river", new DefaultStateData("river",null,null,name));
+
+                List<Facet> fs = new ArrayList<Facet>();
+
+                DefaultState state = (DefaultState) getCurrentState(context);
+                state.computeInit(this, hash(), context, callMeta, fs);
+
+                if (!fs.isEmpty()) {
+                    facets.put(getCurrentStateId(), fs);
+                }
+            }
+            catch (NumberFormatException nfe) {
+                logger.error("Could not create Artifact: " + nfe.getMessage());
+                throw new IllegalArgumentException("No river id given.");
+            }
+        }
+    }
+
+
+    @Override
+    protected void initialize(
+        Artifact artifact,
+        Object   context,
+        CallMeta callMeta)
+    {
+        // do nothing
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/StaticFLYSArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,79 @@
+package de.intevation.flys.artifacts;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+import de.intevation.artifactdatabase.state.State;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+
+public abstract class StaticFLYSArtifact extends FLYSArtifact {
+
+    private static final Logger logger =
+        Logger.getLogger(StaticFLYSArtifact.class);
+
+
+    @Override
+    public Document describe(Document data, CallContext cc) {
+        logger.debug("Describe artifact: " + identifier());
+
+        Document desc = XMLUtils.newDocument();
+
+        ElementCreator creator = new ElementCreator(
+            desc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element root = ProtocolUtils.createRootNode(creator);
+        desc.appendChild(root);
+
+        ProtocolUtils.appendDescribeHeader(creator, root, identifier(), hash());
+        root.appendChild(createOutputModes(cc, desc, creator));
+
+        return desc;
+    }
+
+
+    protected Element createOutputModes(
+        CallContext    cc,
+        Document       doc,
+        ElementCreator creator)
+    {
+        Element outs = ProtocolUtils.createArtNode(
+            creator, "outputmodes", null, null);
+
+        State state       = getCurrentState(cc);
+        List<Output> list = state.getOutputs();
+
+        if (list != null && list.size() > 0) {
+            List<Facet>  fs = facets.get(state.getID());
+            if (fs != null && fs.size() > 0) {
+                List<Output> generated = generateOutputs(list, fs);
+
+                logger.debug("Found " + fs.size() + " current facets.");
+                if (!generated.isEmpty()) {
+                    ProtocolUtils.appendOutputModes(
+                        doc, outs, generated);
+                }
+            }
+            else {
+                logger.debug("No facets found for the current state.");
+            }
+        }
+
+        return outs;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WINFOArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,1339 @@
+package de.intevation.flys.artifacts;
+
+import java.awt.geom.Point2D;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+import de.intevation.artifactdatabase.state.State;
+import de.intevation.artifactdatabase.state.StateEngine;
+
+import de.intevation.artifactdatabase.transition.TransitionEngine;
+
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.Message;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.flys.artifacts.context.FLYSContext;
+
+import de.intevation.flys.artifacts.model.Calculation1;
+import de.intevation.flys.artifacts.model.Calculation2;
+import de.intevation.flys.artifacts.model.Calculation3;
+import de.intevation.flys.artifacts.model.Calculation4;
+import de.intevation.flys.artifacts.model.Calculation;
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.CrossSectionFactory;
+import de.intevation.flys.artifacts.model.DischargeTables;
+import de.intevation.flys.artifacts.model.MainValuesFactory;
+import de.intevation.flys.artifacts.model.Segment;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.model.WstValueTable;
+import de.intevation.flys.artifacts.model.WstValueTableFactory;
+
+import de.intevation.flys.artifacts.states.DefaultState;
+import de.intevation.flys.artifacts.states.LocationDistanceSelect;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.CrossSection;
+import de.intevation.flys.model.CrossSectionLine;
+import de.intevation.flys.model.CrossSectionPoint;
+
+import de.intevation.flys.utils.DoubleUtil;
+import de.intevation.flys.utils.FLYSUtils;
+
+import gnu.trove.TDoubleArrayList;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.flys.artifacts.charts.CrossSectionApp;
+import de.intevation.flys.artifacts.model.CalculationMessage;
+
+/**
+ * The default WINFO artifact.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WINFOArtifact extends FLYSArtifact {
+
+    /** The logger for this class. */
+    private static Logger logger = Logger.getLogger(WINFOArtifact.class);
+
+    /** The name of the artifact. */
+    public static final String ARTIFACT_NAME = "winfo";
+
+    /** XPath */
+    public static final String XPATH_STATIC_UI ="/art:result/art:ui/art:static";
+
+    /** The default number of steps between the start end end of a selected Q
+     * range. */
+    public static final int DEFAULT_Q_STEPS = 30;
+
+    /** The default step width between the start end end kilometer. */
+    public static final double DEFAULT_KM_STEPS = 0.1;
+
+
+    /**
+     * The default constructor.
+     */
+    public WINFOArtifact() {
+    }
+
+
+    /**
+     * This method returns a description of this artifact.
+     *
+     * @param data Some data.
+     * @param context The CallContext.
+     *
+     * @return the description of this artifact.
+     */
+    public Document describe(Document data, CallContext context) {
+        logger.debug("Describe: the current state is: " + getCurrentStateId());
+
+        if (logger.isDebugEnabled()) {
+            dumpArtifact();
+        }
+
+        FLYSContext flysContext = getFlysContext(context);
+
+        StateEngine stateEngine = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        TransitionEngine transitionEngine = (TransitionEngine) flysContext.get(
+            FLYSContext.TRANSITION_ENGINE_KEY);
+
+        List<State> reachable = transitionEngine.getReachableStates(
+            this, getCurrentState(context), stateEngine);
+
+        Document description            = XMLUtils.newDocument();
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            description,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element root = ProtocolUtils.createRootNode(creator);
+        description.appendChild(root);
+
+        State current = getCurrentState(context);
+
+        ProtocolUtils.appendDescribeHeader(creator, root, identifier(), hash());
+        ProtocolUtils.appendState(creator, root, current);
+        ProtocolUtils.appendReachableStates(creator, root, reachable);
+
+        appendBackgroundActivity(creator, root, context);
+
+        Element name = ProtocolUtils.createArtNode(
+            creator, "name",
+            new String[] { "value" },
+            new String[] { getName() });
+
+        Element ui = ProtocolUtils.createArtNode(
+            creator, "ui", null, null);
+
+        Element staticUI  = ProtocolUtils.createArtNode(
+            creator, "static", null, null);
+
+        Element outs = ProtocolUtils.createArtNode(
+            creator, "outputmodes", null, null);
+        appendOutputModes(description, outs, context, identifier());
+
+        appendStaticUI(description, staticUI, context, identifier());
+
+        Element dynamic = current.describe(
+            this,
+            description,
+            root,
+            context,
+            identifier());
+
+        if (dynamic != null) {
+            ui.appendChild(dynamic);
+        }
+
+        ui.appendChild(staticUI);
+
+        root.appendChild(name);
+        root.appendChild(ui);
+        root.appendChild(outs);
+
+        return description;
+    }
+
+
+    /**
+     * Returns the name of the concrete artifact.
+     *
+     * @return the name of the concrete artifact.
+     */
+    public String getName() {
+        return ARTIFACT_NAME;
+    }
+
+
+    protected void appendBackgroundActivity(
+        ElementCreator cr,
+        Element        root,
+        CallContext    context
+    ) {
+        Element inBackground = cr.create("background-processing");
+        root.appendChild(inBackground);
+
+        cr.addAttr(
+            inBackground,
+            "value",
+            String.valueOf(context.isInBackground()),
+            true);
+
+        LinkedList<Message> messages = context.getBackgroundMessages();
+
+        if (messages == null) {
+            return;
+        }
+
+        CalculationMessage  message  = (CalculationMessage) messages.getLast();
+        cr.addAttr(
+            inBackground,
+            "steps",
+            String.valueOf(message.getSteps()),
+            true);
+
+        cr.addAttr(
+            inBackground,
+            "currentStep",
+            String.valueOf(message.getCurrentStep()),
+            true);
+
+        inBackground.setTextContent(message.getMessage());
+    }
+
+
+    protected void appendOutputModes(
+        Document    doc,
+        Element     outs,
+        CallContext context,
+        String      uuid)
+    {
+        List<String> stateIds = getPreviousStateIds();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine engine      = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        for (String stateId: stateIds) {
+            logger.debug("Append output modes for state: " + stateId);
+            DefaultState state = (DefaultState) engine.getState(stateId);
+
+            List<Output> list = state.getOutputs();
+            if (list == null || list.size() == 0) {
+                logger.debug("-> No output modes for this state.");
+                continue;
+            }
+
+            List<Facet>  fs = facets.get(stateId);
+            if (fs == null || fs.size() == 0) {
+                logger.debug("No facets for previous state found.");
+                continue;
+            }
+
+            logger.debug("Found " + fs.size() + " facets in previous states.");
+
+            List<Output> generated = generateOutputs(list, fs);
+
+            ProtocolUtils.appendOutputModes(doc, outs, generated);
+        }
+
+        try {
+            DefaultState cur = (DefaultState) getCurrentState(context);
+            if (cur.validate(this)) {
+                List<Output> list = cur.getOutputs();
+                if (list != null && list.size() > 0) {
+                    logger.debug(
+                        "Append output modes for current state: " + cur.getID());
+
+                    List<Facet>  fs = facets.get(cur.getID());
+                    if (fs != null && fs.size() > 0) {
+                        List<Output> generated = generateOutputs(list, fs);
+
+                        logger.debug("Found " + fs.size() + " current facets.");
+                        if (!generated.isEmpty()) {
+                            ProtocolUtils.appendOutputModes(
+                                doc, outs, generated);
+                        }
+                    }
+                    else {
+                        logger.debug("No facets found for the current state.");
+                    }
+
+                }
+            }
+        }
+        catch (IllegalArgumentException iae) {
+            // state is not valid, so we do not append its outputs.
+        }
+    }
+
+
+    /**
+     * This method appends the static data - that has already been inserted by
+     * the user - to the static node of the DESCRIBE document.
+     *
+     * @param doc The document.
+     * @param ui The root node.
+     * @param context The CallContext.
+     * @param uuid The identifier of the artifact.
+     */
+    protected void appendStaticUI(
+        Document    doc,
+        Node        ui,
+        CallContext context,
+        String uuid)
+    {
+        List<String> stateIds = getPreviousStateIds();
+
+        FLYSContext flysContext = getFlysContext(context);
+        StateEngine engine      = (StateEngine) flysContext.get(
+            FLYSContext.STATE_ENGINE_KEY);
+
+        for (String stateId: stateIds) {
+            logger.debug("Append static data for state: " + stateId);
+            DefaultState state = (DefaultState) engine.getState(stateId);
+
+            ui.appendChild(state.describeStatic(this, doc, ui, context, uuid));
+        }
+    }
+
+
+    //
+    // METHODS FOR RETRIEVING COMPUTED DATA FOR DIFFERENT CHART TYPES
+    //
+
+    /**
+     * Returns the data that is computed by a waterlevel computation.
+     *
+     * @return an array of data triples that consist of W, Q and Kms.
+     */
+    public CalculationResult getWaterlevelData()
+    {
+        logger.debug("WINFOArtifact.getWaterlevelData");
+
+        River river = FLYSUtils.getRiver(this);
+        if (river == null) {
+            return error(new WQKms[0], "No river selected.");
+        }
+
+        double[] kms = getKms();
+        if (kms == null) {
+            return error(new WQKms[0], "No Kms selected.");
+        }
+
+        double[] qs   = getQs();
+        double[] ws   = null;
+        boolean  qSel = true;
+
+        if (qs == null) {
+            logger.debug("Determine Q values based on a set of W values.");
+            qSel = false;
+            ws   = getWs();
+            qs   = getQsForWs(ws);
+            if (qs == null) {
+                return error(new WQKms[0], "conversion ws to qs failed.");
+            }
+        }
+
+        WstValueTable wst = WstValueTableFactory.getTable(river);
+        if (wst == null) {
+            return error(new WQKms[0], "No Wst found for selected river.");
+        }
+
+
+        double [] range = FLYSUtils.getKmRange(this);
+        if (range == null) {
+            return error(new WQKms[0], "No range found");
+        }
+
+        double refKm;
+
+        if (isFreeQ()) {
+            refKm = range[0];
+            logger.debug("'free' calculation (km " + refKm + ")");
+        }
+        else {
+            Gauge gauge = river.determineGaugeByPosition(range[0]);
+            if (gauge == null) {
+                return error(
+                    new WQKms[0], "No gauge found for km " + range[0]);
+            }
+
+            refKm = gauge.getStation().doubleValue();
+
+            logger.debug(
+                "reference gauge: " + gauge.getName() + " (km " + refKm + ")");
+        }
+
+        return computeWaterlevelData(kms, qs, ws, wst, refKm);
+    }
+
+
+    /**
+     * Computes the data of a waterlevel computation based on the interpolation
+     * in WstValueTable.
+     *
+     * @param kms The kilometer values.
+     * @param qa The discharge values.
+     * @param wst The WstValueTable used for the interpolation.
+     *
+     * @return an array of data triples that consist of W, Q and Kms.
+     */
+    public static CalculationResult computeWaterlevelData(
+        double []     kms,
+        double []     qs,
+        double []     ws,
+        WstValueTable wst,
+        double        refKm
+    ) {
+        logger.info("WINFOArtifact.computeWaterlevelData");
+
+        Calculation1 calc1 = new Calculation1(kms, qs, ws, refKm);
+
+        return calc1.calculate(wst);
+    }
+
+
+    /**
+     * Returns the data that is computed by a duration curve computation.
+     *
+     * @return the data computed by a duration curve computation.
+     */
+    public CalculationResult getDurationCurveData() {
+        logger.debug("WINFOArtifact.getDurationCurveData");
+
+        River r = FLYSUtils.getRiver(this);
+
+        if (r == null) {
+            return error(null, "Cannot determine river.");
+        }
+
+        Gauge g = getGauge();
+
+        if (g == null) {
+           return error(null, "Cannot determine gauge.");
+        }
+
+        double[] locations = FLYSUtils.getLocations(this);
+
+        if (locations == null) {
+            return error(null, "Cannot determine location.");
+        }
+
+        WstValueTable wst = WstValueTableFactory.getTable(r);
+        if (wst == null) {
+            return error(null, "No Wst found for selected river.");
+        }
+
+        return computeDurationCurveData(g, wst, locations[0]);
+    }
+
+
+    /**
+     * Computes the data used to create duration curves.
+     *
+     * @param gauge The selected gauge.
+     * @param location The selected location.
+     *
+     * @return the computed data.
+     */
+    public static CalculationResult computeDurationCurveData(
+        Gauge           gauge,
+        WstValueTable   wst,
+        double          location)
+    {
+        logger.info("WINFOArtifact.computeDurationCurveData");
+
+        Object[] obj = MainValuesFactory.getDurationCurveData(gauge);
+
+        int[]    days = (int[]) obj[0];
+        double[] qs   = (double[]) obj[1];
+
+        Calculation3 calculation = new Calculation3(location, days, qs);
+
+        return calculation.calculate(wst);
+    }
+
+
+    /**
+     * Returns the data that is used to create discharge curves.
+     *
+     */
+    public CalculationResult getDischargeCurveData() {
+
+        River river = FLYSUtils.getRiver(this);
+        if (river == null) {
+            return error(new WQKms[0], "no river found");
+        }
+
+        double [] distance = FLYSUtils.getKmRange(this);
+
+        if (distance == null) {
+            return error(new WQKms[0], "no range found");
+        }
+
+        List<Gauge> gauges = river.determineGauges(distance[0], distance[1]);
+
+        if (gauges.isEmpty()) {
+            return error(new WQKms[0], "no gauges found");
+        }
+
+        String [] names = new String[gauges.size()];
+
+        for (int i = 0; i < names.length; ++i) {
+            names[i] = gauges.get(i).getName();
+        }
+
+        DischargeTables dt = new DischargeTables(river.getName(), names);
+
+        Map<String, double [][]> map = dt.getValues(100d);
+
+        ArrayList<WQKms> res = new ArrayList<WQKms>();
+
+        for (Gauge gauge: gauges) {
+            String name = gauge.getName();
+            double [][] values = map.get(name);
+            if (values == null) {
+                continue;
+            }
+            double [] kms = new double[values[0].length];
+            Arrays.fill(kms, gauge.getStation().doubleValue());
+            res.add(new WQKms(kms, values[0], values[1], name));
+        }
+
+        return new CalculationResult(
+            res.toArray(new WQKms[res.size()]),
+            new Calculation());
+    }
+
+
+    /**
+     * Returns the data that is computed by a discharge curve computation.
+     *
+     * @return the data computed by a discharge curve computation.
+     */
+    public CalculationResult getComputedDischargeCurveData()
+    throws NullPointerException
+    {
+        logger.debug("WINFOArtifact.getComputedDischargeCurveData");
+
+        River r = FLYSUtils.getRiver(this);
+
+        if (r == null) {
+            return error(new WQKms[0], "Cannot determine river.");
+        }
+
+        double[] locations = FLYSUtils.getLocations(this);
+
+        if (locations == null) {
+            return error(new WQKms[0], "Cannot determine location.");
+        }
+
+        WstValueTable wst = WstValueTableFactory.getTable(r);
+        if (wst == null) {
+            return error(new WQKms[0], "No Wst found for selected river.");
+        }
+
+        return computeDischargeCurveData(wst, locations[0]);
+    }
+
+
+    /**
+     * Computes the data used to create computed discharge curves.
+     *
+     * @param wst The WstValueTable that is used for the interpolation.
+     * @param location The location where the computation should be based on.
+     *
+     * @return an object that contains tuples of W/Q values at the specified
+     * location.
+     */
+    public static CalculationResult computeDischargeCurveData(
+        WstValueTable wst,
+        double location)
+    {
+        logger.info("WINFOArtifact.computeDischargeCurveData");
+
+        Calculation2 calculation = new Calculation2(location);
+
+        return calculation.calculate(wst);
+    }
+
+    protected static final CalculationResult error(Object data, String msg) {
+        return new CalculationResult(data, new Calculation(msg));
+    }
+
+
+    /**
+     * Returns the data computed by the discharge longitudinal section
+     * computation.
+     *
+     * @return an array of WQKms object - one object for each given Q value.
+     */
+    public CalculationResult getDischargeLongitudinalSectionData() {
+
+        logger.debug("WINFOArtifact.getDischargeLongitudinalSectionData");
+
+        River river = FLYSUtils.getRiver(this);
+        if (river == null) {
+            logger.debug("No river selected.");
+            return error(new WQKms[0], "No river selected.");
+        }
+
+        WstValueTable table = WstValueTableFactory.getTable(river);
+        if (table == null) {
+            logger.debug("No wst found for selected river.");
+            return error(new WQKms[0], "No wst found for selected river.");
+        }
+
+        List<Segment> segments = getSegments();
+
+        if (segments == null) {
+            logger.debug("Cannot create segments.");
+            return error(new WQKms[0], "Cannot create segments.");
+        }
+
+        double [] range = getFromToStep();
+
+        if (range == null) {
+            logger.debug("Cannot figure out range.");
+            return error(new WQKms[0], "Cannot figure out range.");
+        }
+
+        Calculation4 calc4 = new Calculation4(segments, river, isQ());
+
+        return calc4.calculate(table, range[0], range[1], range[2]);
+    }
+
+
+    public List<Segment> getSegments() {
+        StateData wqValues = getData("wq_values");
+        if (wqValues == null) {
+            logger.warn("no wq_values given");
+            return Collections.emptyList();
+        }
+        String input = (String)wqValues.getValue();
+        if (input == null || (input = input.trim()).length() == 0) {
+            logger.warn("wq_values are empty");
+            return Collections.emptyList();
+        }
+        return Segment.parseSegments(input);
+    }
+
+
+    /**
+     * Get List of all cross-sections for current river.
+     *
+     * @return List of CrossSections for current river, null in case of error.
+     */
+    protected List<CrossSection> getCrossSections() {
+        River river = FLYSUtils.getRiver(this);
+        if (river == null) {
+            logger.warn("No river in WINFO found");
+            return null;
+        }
+        return CrossSectionFactory.getCrossSections(river);
+    }
+
+
+    /**
+     * Get sorted, valid Points of a CrossSectionLine.
+     *
+     * @param line line of interest.
+     *
+     * @return list of points of CrossSectionLine, sorted.
+     */
+    protected List<Point2D> getCrossSectionLinesPoints(CrossSectionLine line) {
+        List<Point2D> points = new ArrayList<Point2D>();
+
+        if (line == null) {
+            return points;
+        }
+
+        List<CrossSectionPoint> linePoints = line.getPoints();
+        if (linePoints.isEmpty()) {
+            logger.info("No points in selected CrossSectionLine.");
+            return points;
+        }
+        Collections.sort(linePoints, CrossSectionApp.COL_POS_CMP);
+        for (CrossSectionPoint p: linePoints) {
+            double x = p.getX().doubleValue();
+            double y = p.getY().doubleValue();
+            if (CrossSectionApp.isValid(x) && CrossSectionApp.isValid(y)) {
+                points.add(new Point2D.Double(x,y));
+            }
+        }
+        return points;
+    }
+
+
+    /**
+     * Get CrossSectionLine spatially closest to what is specified in the data
+     * "cross_section.km".
+     *
+     * @return CrossSectionLine closest to "cross_section.km".
+     */
+    protected CrossSectionLine searchCrossSectionKmLine() {
+        double wishKM = 0.0f;
+        try {
+            wishKM = Double.parseDouble(getDataAsString("cross_section.km"));
+        }
+        catch (Exception e) {
+            ;
+        }
+
+        // Get the cross section closest to requested km.
+        // Naive, linear approach.
+        List<CrossSection> sections = getCrossSections();
+        if (sections.size() == 0 || sections.get(0).getLines().size() == 0) {
+            return null;
+        }
+        List<CrossSectionLine> crossSectionLines =
+            sections.get(0).getLines();
+        CrossSectionLine oldLine = crossSectionLines.get(0);
+        double oldDiff = Math.abs(wishKM - oldLine.getKm().doubleValue());
+        for (CrossSectionLine line: crossSectionLines) {
+            double diff = Math.abs(wishKM - line.getKm().doubleValue());
+            if (diff > oldDiff) {
+                break;
+            }
+            oldDiff = diff;
+            oldLine = line;
+        }
+        return oldLine;
+    }
+
+
+    /**
+     * Get km for which a CrossSection is actually available (this may vary
+     * from the user picked "cross_section.km" data).
+     *
+     * @return km for which cross section is calculated.
+     */
+    public double getCrossSectionSnapKm() {
+        // Note that this is this triggers a linear search.
+        CrossSectionLine line = searchCrossSectionKmLine();
+        if (line == null) {
+            logger.warn("No Cross Section for given km found.");
+            return 0.0f;
+        }
+        else {
+            return line.getKm().doubleValue();
+        }
+    }
+
+
+    /**
+     * Get points of Profile of cross section.
+     *
+     * @return an array holding coordinates of points of profile (
+     *         in the form {{x1, x2} {y1, y2}} ).
+     */
+    public double [][] getCrossSectionData() {
+        logger.info("getCrossSectionData() for cross_section.km "
+            + getDataAsString("cross_section.km"));
+        CrossSectionLine line = searchCrossSectionKmLine();
+        return getCrossSectionProfile(line);
+    }
+
+
+    /**
+     * Get points of line describing the surface of water at cross section.
+     *
+     * @return an array holding coordinates of points of surface of water (
+     *         in the form {{x1, x2} {y1, y2}} ).
+     */
+    public double [][] getWaterLines() {
+        logger.debug("getWaterLines()");
+        CrossSectionLine csl = searchCrossSectionKmLine();
+        List<Point2D> points = getCrossSectionLinesPoints(csl);
+        // Need W at km
+        WQKms [] wqkms = (WQKms[]) getWaterlevelData().getData();
+        if (wqkms.length == 0) {
+            logger.error("No WQKms found.");
+            return CrossSectionApp.createWaterLines(points, 0.0f);
+        }
+        else
+        {
+            if (wqkms.length > 1) {
+                logger.warn("More than one wqkms found, taking first one.");
+            }
+            // Find W at km, linear naive approach.
+            WQKms triple = wqkms[0];
+            // Find index of km.
+            double wishKM = 0.0f;
+            int old_idx = 0;
+            try {
+                wishKM = Double.parseDouble(getDataAsString("cross_section.km"));
+            }
+            catch (Exception e) {
+                ;
+            }
+
+            if (triple.size() == 0) {
+                logger.warn("Calculation of waterline is empty.");
+                return CrossSectionApp.createWaterLines(points, 0.0f);
+            }
+
+            // Linear seach in WQKms for closest km.
+            double old_dist_wish = Math.abs(wishKM - triple.getKm(0));
+            double last_w = triple.getW(0);
+
+            for (int i = 0; i < triple.size(); i++) {
+                double diff = Math.abs(wishKM - triple.getKm(i));
+                if (diff > old_dist_wish) {
+                    break;
+                }
+                last_w = triple.getW(i);
+                old_dist_wish = diff;
+            }
+            return CrossSectionApp.createWaterLines(points, last_w);
+        }
+    }
+
+
+    /**
+     * Get name of cross section.
+     */
+    public String getCrossSectionName() {
+        List<CrossSection> sections = getCrossSections();
+
+        if (sections.size() > 0) {
+            return sections.get(0).getDescription();
+        }
+        else {
+            return "";
+        }
+    }
+
+
+    /**
+     * Get points of CrossSection Line.
+     * @param csl The crossSectionline of interest.
+     * @return x and y positions of cross section profile.
+     */
+    protected double [][] getCrossSectionProfile(CrossSectionLine csl) {
+        List<Point2D> points = getCrossSectionLinesPoints(csl);
+        double [] xs = new double[points.size()];
+        double [] ys = new double[points.size()];
+
+        if (points.isEmpty()) {
+            return new double [][] {xs, ys};
+        }
+
+        xs[0] = points.get(0).getX();
+        ys[0] = points.get(0).getY();
+
+        for (int i = 1; i < points.size(); i++) {
+            Point2D p = points.get(i);
+            xs[i] = p.getX();
+            if (xs[i] < xs[i-1]) {
+                xs[i] = xs[i-1] + CrossSectionApp.EPSILON;
+            }
+            ys[i] = p.getY(); 
+        }
+        return new double [][] { xs, ys };
+    }
+
+
+    /**
+     * Returns the Qs for a number of Ws. This method makes use of
+     * DischargeTables.getQForW().
+     *
+     * @param ws An array of W values.
+     *
+     * @return an array of Q values.
+     */
+    public double[] getQsForWs(double[] ws) {
+
+        boolean debug = logger.isDebugEnabled();
+
+        if (debug) {
+            logger.debug("FLYSArtifact.getQsForWs");
+        }
+
+        River r = FLYSUtils.getRiver(this);
+        if (r == null) {
+            logger.warn("no river found");
+            return null;
+        }
+
+        double [] range = FLYSUtils.getKmRange(this);
+        if (range == null) {
+            logger.warn("no ranges found");
+            return null;
+        }
+
+        if (debug) {
+            logger.debug("range: " + Arrays.toString(range));
+        }
+
+        Gauge g = r.determineGaugeByPosition(range[0]);
+        if (g == null) {
+            logger.warn("no gauge found for km: " + range[0]);
+            return null;
+        }
+
+        if (debug) {
+            logger.debug("convert w->q with gauge '" + g.getName() + "'");
+        }
+
+        DischargeTables dt = new DischargeTables(r.getName(), g.getName());
+        Map<String, double [][]>  tmp = dt.getValues();
+
+        double[][] values = tmp.get(g.getName());
+        double[]   qs     = new double[ws.length];
+
+        for (int i = 0; i < ws.length; i++) {
+            qs[i] = dt.getQForW(values, ws[i]);
+            if (debug) {
+                logger.debug("w: " + ws[i] + " -> q: " + qs[i]);
+            }
+        }
+
+        return qs;
+    }
+
+
+    /**
+     * Determines the selected mode of distance/range input.
+     *
+     * @return true, if the range mode is selected otherwise false.
+     */
+    public boolean isRange() {
+        StateData mode = getData("ld_mode");
+
+        if (mode == null) {
+            logger.warn("No mode location/range chosen. Defaults to range.");
+            return true;
+        }
+
+        String value = (String) mode.getValue();
+
+        return value.equals("distance");
+    }
+
+
+    /**
+     * Returns the selected distance based on a given range (from, to).
+     *
+     * @param dFrom The StateData that contains the lower value.
+     * @param dTo The StateData that contains the upper value.
+     *
+     * @return the selected distance.
+     */
+    protected double[] getDistanceByRange(StateData dFrom, StateData dTo) {
+        double from = Double.parseDouble((String) dFrom.getValue());
+        double to   = Double.parseDouble((String) dTo.getValue());
+
+        return new double[] { from, to };
+    }
+
+
+    /**
+     * Returns the selected Kms.
+     *
+     * @param distance An 2dim array with [lower, upper] values.
+     *
+     * @return the selected Kms.
+     */
+    public double[] getKms(double[] distance) {
+        StateData dStep = getData("ld_step");
+
+        if (dStep == null) {
+            logger.warn("No step width given. Cannot compute Kms.");
+            return null;
+        }
+
+        double step = Double.parseDouble((String) dStep.getValue());
+
+        // transform step from 'm' into 'km'
+        step = step / 1000;
+
+        if (step == 0d) {
+            step = DEFAULT_KM_STEPS;
+        }
+
+        return DoubleUtil.explode(distance[0], distance[1], step);
+    }
+
+
+    /**
+     * Returns the selected Kms.
+     *
+     * @return the selected kms.
+     */
+    public double[] getKms() {
+        if (isRange()) {
+            double[] distance = FLYSUtils.getKmRange(this);
+            return getKms(distance);
+
+        }
+        else {
+            return LocationDistanceSelect.getLocations(this);
+        }
+    }
+
+
+    public double [] getFromToStep() {
+        if (!isRange()) {
+            return null;
+        }
+        double [] fromTo = FLYSUtils.getKmRange(this);
+
+        if (fromTo == null) {
+            return null;
+        }
+
+        StateData dStep = getData("ld_step");
+        if (dStep == null) {
+            return null;
+        }
+
+        double [] result = new double[3];
+        result[0] = fromTo[0];
+        result[1] = fromTo[1];
+
+        try {
+            String step = (String)dStep.getValue();
+            result[2] = DoubleUtil.round(Double.parseDouble(step) / 1000d);
+        }
+        catch (NumberFormatException nfe) {
+            return null;
+        }
+
+        return result;
+    }
+
+
+    /**
+     * Returns the gauge based on the current distance and river.
+     *
+     * @return the gauge.
+     */
+    public Gauge getGauge() {
+        River river = FLYSUtils.getRiver(this);
+
+        if (river == null) {
+            logger.debug("no river found");
+            return null;
+        }
+
+        double[] dist  = FLYSUtils.getKmRange(this);
+
+        if (dist == null) {
+            logger.debug("no range found");
+            return null;
+        }
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Determine gauge for:");
+            logger.debug("... river: " + river.getName());
+            logger.debug("... distance: " + dist[0] + " - " + dist[1]);
+        }
+
+        Gauge gauge = river.determineGauge(dist[0], dist[1]);
+
+        String name = gauge != null ? gauge.getName() : "'n/a";
+        logger.debug("Found gauge: " + name);
+
+        return gauge;
+    }
+
+
+    /**
+     * Returns the gauges that match the selected kilometer range.
+     *
+     * @return the gauges based on the selected kilometer range.
+     */
+    public List<Gauge> getGauges() {
+
+        River river = FLYSUtils.getRiver(this);
+        if (river == null) {
+            return null;
+        }
+
+        double [] dist = FLYSUtils.getKmRange(this);
+        if (dist == null) {
+            return null;
+        }
+
+        return river.determineGauges(dist[0], dist[1]);
+    }
+
+
+    /**
+     * This method returns the Q values.
+     *
+     * @return the selected Q values or null, if no Q values are selected.
+     */
+    public double[] getQs() {
+        StateData dMode      = getData("wq_mode");
+        StateData dSelection = getData("wq_selection");
+
+        String mode = dMode != null ? (String) dMode.getValue() : "";
+        String sel  = dSelection != null ? (String)dSelection.getValue() : null;
+
+        if (mode.equals("Q")) {
+            if (sel != null && sel.equals("single")) {
+                return getSingleWQValues();
+            }
+            else {
+                return getWQTriple();
+            }
+        }
+        else {
+            logger.warn("You try to get Qs, but W has been inserted.");
+            return null;
+        }
+    }
+
+
+    public boolean isQ() {
+        StateData mode = getData("wq_mode");
+        return mode != null && mode.getValue().equals("Q");
+    }
+
+
+    /**
+     * Returns true, if the parameter is set to compute data on a free range.
+     * Otherwise it returns false, which tells the calculation that it is bound
+     * to a gauge.
+     *
+     * @return true, if the calculation should compute on a free range otherwise
+     * false and the calculation is bound to a gauge.
+     */
+    public boolean isFreeQ() {
+        StateData mode  = getData("wq_free");
+        String    value = (mode != null) ? (String) mode.getValue() : null;
+
+        logger.debug("isFreeQ: " + value);
+
+        if (value == null) {
+            return false;
+        }
+
+        return Boolean.valueOf(value);
+    }
+
+
+    /**
+     * Returns the Q values based on a specified kilometer range.
+     *
+     * @param range A 2dim array with lower and upper kilometer range.
+     *
+     * @return an array of Q values.
+     */
+    public double[] getQs(double[] range) {
+        StateData dMode   = getData("wq_mode");
+        StateData dValues = getData("wq_values");
+
+        String mode = (dMode != null) ? (String) dMode.getValue() : "";
+
+        if (mode.equals("Q")) {
+            return getWQForDist(range);
+        }
+
+        logger.warn("You try to get Qs, but Ws has been inserted.");
+        return null;
+    }
+
+
+    /**
+     * Returns the W values based on a specified kilometer range.
+     *
+     * @param range A 2dim array with lower and upper kilometer range.
+     *
+     * @return an array of W values.
+     */
+    public double[] getWs(double[] range) {
+        StateData dMode   = getData("wq_mode");
+        StateData dValues = getData("wq_values");
+
+        String mode = (dMode != null) ? (String) dMode.getValue() : "";
+
+        if (mode.equals("W")) {
+            return getWQForDist(range);
+        }
+
+        logger.warn("You try to get Ws, but Qs has been inserted.");
+        return null;
+    }
+
+
+    /**
+     * This method returns the W values.
+     *
+     * @return the selected W values or null, if no W values are selected.
+     */
+    public double[] getWs() {
+        StateData dMode   = getData("wq_mode");
+        StateData dSingle = getData("wq_single");
+
+        String mode = (dMode != null) ? (String) dMode.getValue() : "";
+
+        if (mode.equals("W")) {
+            if (dSingle != null) {
+                return getSingleWQValues();
+            }
+            else {
+                return getWQTriple();
+            }
+        }
+        else {
+            logger.warn("You try to get Qs, but W has been inserted.");
+            return null;
+        }
+    }
+
+    /**
+     * This method returns the given W or Q values for a specific range
+     * (inserted in the WQ input panel for discharge longitudinal sections).
+     *
+     * @param dist A 2dim array with lower und upper kilometer values.
+     *
+     * @return an array of W or Q values.
+     */
+    protected double[] getWQForDist(double[] dist) {
+        logger.debug("Search wq values for range: " + dist[0] + " - " + dist[1]);
+        StateData data = getData("wq_values");
+
+        if (data == null) {
+            logger.warn("Missing wq values!");
+            return null;
+        }
+
+        String dataString = (String) data.getValue();
+        String[]   ranges = dataString.split(":");
+
+        for (String range: ranges) {
+            String[] parts = range.split(";");
+
+            double lower = Double.parseDouble(parts[0]);
+            double upper = Double.parseDouble(parts[1]);
+
+            if (lower <= dist[0] && upper >= dist[1]) {
+                String[] values = parts[2].split(",");
+
+                int      num = values.length;
+                double[] res = new double[num];
+
+                for (int i = 0; i < num; i++) {
+                    try {
+                        res[i] = Double.parseDouble(values[i]);
+                    }
+                    catch (NumberFormatException nfe) {
+                        logger.warn(nfe, nfe);
+                    }
+                }
+
+                return res;
+            }
+        }
+
+        logger.warn("Specified range for WQ not found!");
+
+        return null;
+    }
+
+
+    /**
+     * This method returns an array of inserted WQ triples that consist of from,
+     * to and the step width.
+     *
+     * @return an array of from, to and step width.
+     */
+    protected double[] getWQTriple() {
+        StateData dFrom = getData("wq_from");
+        StateData dTo   = getData("wq_to");
+
+        if (dFrom == null || dTo == null) {
+            logger.warn("Missing start or end value for range.");
+            return null;
+        }
+
+        double from = Double.parseDouble((String) dFrom.getValue());
+        double to   = Double.parseDouble((String) dTo.getValue());
+
+        StateData dStep = getData("wq_step");
+
+        if (dStep == null) {
+            logger.warn("No step width given. Cannot compute Qs.");
+            return null;
+        }
+
+        double step  = Double.parseDouble((String) dStep.getValue());
+
+        // if no width is given, the DEFAULT_Q_STEPS is used to compute the step
+        // width. Maybe, we should round the value to a number of digits.
+        if (step == 0d) {
+            double diff = to - from;
+            step = diff / DEFAULT_Q_STEPS;
+        }
+
+        return DoubleUtil.explode(from, to, step);
+    }
+
+
+    /**
+     * Returns an array of inserted WQ double values stored as whitespace
+     * separated list.
+     *
+     * @return an array of W or Q values.
+     */
+    protected double[] getSingleWQValues() {
+        StateData dSingle = getData("wq_single");
+
+        if (dSingle == null) {
+            logger.warn("Cannot determine single WQ values. No data given.");
+            return null;
+        }
+
+        String   tmp       = (String) dSingle.getValue();
+        String[] strValues = tmp.split(" ");
+
+        TDoubleArrayList values = new TDoubleArrayList();
+
+        for (String strValue: strValues) {
+            try {
+                values.add(Double.parseDouble(strValue));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        values.sort();
+
+        return values.toNativeArray();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/WMSBackgroundArtifact.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,49 @@
+package de.intevation.flys.artifacts;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.states.DefaultState;
+
+
+public class WMSBackgroundArtifact extends StaticFLYSArtifact {
+
+    public static final String NAME = "wmsbackground";
+
+
+    private static final Logger logger =
+        Logger.getLogger(WMSBackgroundArtifact.class);
+
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+
+    @Override
+    protected void initialize(Artifact artifact, Object context, CallMeta meta) {
+        logger.debug("Initialize internal state with: "+ artifact.identifier());
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        addData("river", flys.getData("river"));
+
+        List<Facet> fs = new ArrayList<Facet>();
+
+        // TODO Add CallMeta
+        DefaultState state = (DefaultState) getCurrentState(context);
+        state.computeInit(this, hash(), context, meta, fs);
+
+        if (!fs.isEmpty()) {
+            facets.put(getCurrentStateId(), fs);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/cache/CacheFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,79 @@
+package de.intevation.flys.artifacts.cache;
+
+import de.intevation.artifacts.common.utils.Config;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.CacheException;
+import net.sf.ehcache.CacheManager;
+
+import org.apache.log4j.Logger;
+
+public final class CacheFactory
+{
+    private static Logger log = Logger.getLogger(CacheFactory.class);
+
+    public static final String CACHE_CONFIG_FILE_PROPERTY =
+        "flys.artifacts.cache.config.file";
+
+    public static final String XPATH_CACHE_CONFIG_FILE =
+        "/artifact-database/cache/config-file/text()";
+
+    private CacheFactory() {
+    }
+
+    private static boolean      initialized;
+
+    private static CacheManager cacheManager;
+
+    public static final Cache getCache() {
+        return getCache(Cache.DEFAULT_CACHE_NAME);
+    }
+
+    public static final String getConfigFile() {
+        String configFile = System.getProperty(CACHE_CONFIG_FILE_PROPERTY);
+
+        if (configFile != null) {
+            return configFile;
+        }
+
+        configFile = Config.getStringXPath(XPATH_CACHE_CONFIG_FILE);
+
+        if (configFile != null) {
+            configFile = Config.replaceConfigDir(configFile);
+        }
+
+        return configFile;
+    }
+
+    public static final synchronized Cache getCache(String cacheName) {
+        if (!initialized) {
+            initialized = true; // try only once
+            String configFile = getConfigFile();
+            if (configFile != null) {
+                try {
+                    cacheManager = CacheManager.create(configFile);
+                    //System.setProperty(
+                    //  "net.sf.ehcache.enableShutdownHook", "true");
+                    Runtime.getRuntime().addShutdownHook(new Thread() {
+                        public void run() {
+                            log.info("shutting down caches");
+                            for (String name: cacheManager.getCacheNames()) {
+                                log.info("\tflushing '" + name + "'");
+                                cacheManager.getCache(name).flush();
+                            }
+                            cacheManager.shutdown();
+                        }
+                    });
+                }
+                catch (CacheException ce) {
+                    log.error("cannot configure cache", ce);
+                }
+            }
+        }
+
+        return cacheManager != null
+            ? cacheManager.getCache(cacheName)
+            : null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/charts/CrossSectionApp.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,463 @@
+package de.intevation.flys.artifacts.charts;
+
+import java.math.MathContext;
+
+import java.awt.Dimension;
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JPanel;
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JTextField;
+import javax.swing.DefaultComboBoxModel;
+
+import java.awt.event.ItemListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+import java.awt.geom.Point2D;
+import java.awt.geom.Line2D;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Comparator;
+import java.util.Collections;
+import java.util.Iterator;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.FileWriter;
+import java.io.PrintWriter;
+
+import org.jfree.ui.ApplicationFrame;
+import org.jfree.ui.RefineryUtilities;
+
+import org.jfree.chart.ChartFactory;
+
+import org.jfree.chart.plot.PlotOrientation;
+import org.jfree.chart.plot.XYPlot;
+
+import org.jfree.chart.ChartUtilities;
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.ChartPanel;
+
+import org.jfree.chart.axis.NumberAxis;
+
+import org.jfree.data.xy.XYDataset;
+import org.jfree.data.xy.DefaultXYDataset;
+
+import de.intevation.flys.model.CrossSection;
+import de.intevation.flys.model.CrossSectionLine;
+import de.intevation.flys.model.CrossSectionPoint;
+
+import de.intevation.flys.geom.Lines;
+
+import de.intevation.flys.backend.SessionFactoryProvider;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import gnu.trove.TDoubleArrayList;
+
+public class CrossSectionApp
+extends      ApplicationFrame
+{
+    public static final String RIVER = System.getProperty("river", "Saar");
+
+    public static final double EPSILON   = 1e-4;
+
+    public static final double TOO_SMALL = 0.2;
+    public static final double TOO_BIG   = 500;
+
+    public static final Comparator<CrossSectionPoint> COL_POS_CMP =
+        new Comparator<CrossSectionPoint>() {
+            @Override
+            public int compare(CrossSectionPoint a, CrossSectionPoint b) {
+                // TODO evaluate: isnt it enough to
+                // return (|d| > |EPS|) ? d : diff
+                double xa = a.getX().doubleValue();
+                double xb = b.getX().doubleValue();
+                double d = xa - xb;
+                if (d < -EPSILON) return -1;
+                if (d > +EPSILON) return +1;
+                int diff = a.getColPos() - b.getColPos();
+                return diff < 0 ? -1 : diff > 0 ? +1 : 0;
+            }
+        };
+
+    public static final boolean isValid(double x) {
+        x = Math.abs(x);
+        return x > TOO_SMALL && x < TOO_BIG;
+    }
+
+    protected Session session;
+
+    protected JComboBox crossSectionsCB;
+    protected JComboBox crossSectionLinesCB;
+    protected JTextField waterlevelTF;
+
+    protected ChartPanel chartPanel;
+
+    protected Double lastWaterLevel;
+
+
+    public static class CrossSectionItem {
+
+        CrossSection crossSection;
+
+        public CrossSectionItem(CrossSection crossSection) {
+            this.crossSection = crossSection;
+        }
+
+        public String toString() {
+            return crossSection.getDescription();
+        }
+    } // CrossSectionItem
+
+    public static class CrossSectionLineItem {
+
+        CrossSectionLine line;
+
+        public CrossSectionLineItem(CrossSectionLine line) {
+            this.line = line;
+        }
+
+        public String toString() {
+            double v = line.getKm().doubleValue();
+            return String.valueOf(Math.round(v * 1000.0)/1000d);
+        }
+    } // CrossSectionLineItem
+
+    public CrossSectionApp(String title) {
+        super(title);
+
+        session = SessionFactoryProvider
+            .createSessionFactory()
+            .openSession();
+
+        JPanel content = createContent();
+        content.setPreferredSize(new Dimension(640, 480));
+        setContentPane(content);
+
+    }
+
+    public List<CrossSection> crossSections(String river) {
+        Query query = session.createQuery(
+            "from CrossSection where river.name = :river");
+        query.setParameter("river", river);
+        return query.list();
+    }
+
+    public JPanel createContent() {
+        JPanel panel = new JPanel(new BorderLayout());
+
+
+        JPanel nav = new JPanel(new FlowLayout());
+
+        Object [] csis = createCrossSectionItems();
+        crossSectionsCB = new JComboBox(csis);
+
+        DefaultComboBoxModel dcbm;
+
+        if (csis.length > 0) {
+            Object [] cslis =
+                createCrossSectionLineItems(
+                    ((CrossSectionItem)csis[0]).crossSection);
+            dcbm = new DefaultComboBoxModel(cslis);
+            if (cslis.length > 0) {
+                dcbm.setSelectedItem(cslis[0]);
+            }
+        }
+        else {
+            dcbm = new DefaultComboBoxModel(new Object[0]);
+        }
+
+        crossSectionLinesCB = new JComboBox(dcbm);
+
+        nav.add(crossSectionsCB);
+        nav.add(crossSectionLinesCB);
+
+        crossSectionsCB.addItemListener(new ItemListener() {
+            public void itemStateChanged(ItemEvent ie) {
+                if (ie.getStateChange() == ItemEvent.SELECTED) {
+                    updateCrossSection(
+                        ((CrossSectionItem)ie.getItem()).crossSection);
+                }
+            }
+        });
+
+        crossSectionLinesCB.addItemListener(new ItemListener() {
+            public void itemStateChanged(ItemEvent ie) {
+                if (ie.getStateChange() == ItemEvent.SELECTED) {
+                    updateChart();
+                }
+            }
+        });
+
+
+        waterlevelTF = new JTextField(5);
+
+        waterlevelTF.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent ae) {
+                waterLevelChanged();
+            }
+        });
+
+        nav.add(waterlevelTF);
+
+        JButton dump = new JButton("dump");
+
+        dump.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent ae) {
+                dumpData();
+            }
+        });
+
+        nav.add(dump);
+
+        panel.add(nav, BorderLayout.SOUTH);
+
+        chartPanel = createChartPanel();
+
+        panel.add(chartPanel, BorderLayout.CENTER);
+
+        return panel;
+    }
+
+    protected void waterLevelChanged() {
+        String value = waterlevelTF.getText();
+        try {
+            lastWaterLevel = Double.parseDouble(value);
+        }
+        catch (NumberFormatException nfe) {
+            waterlevelTF.setText(
+                lastWaterLevel != null ? lastWaterLevel.toString() : "");
+            return;
+        }
+        updateChart();
+    }
+
+    protected void updateChart() {
+
+        CrossSectionLineItem csli =
+            (CrossSectionLineItem)crossSectionLinesCB.getSelectedItem();
+
+        JFreeChart chart = createChart(csli == null
+            ? new DefaultXYDataset()
+            : generateDataset(csli.line, lastWaterLevel));
+
+        chartPanel.setChart(chart);
+    }
+
+    protected ChartPanel createChartPanel() {
+        CrossSectionLineItem csli =
+            (CrossSectionLineItem)crossSectionLinesCB.getSelectedItem();
+
+        JFreeChart chart = createChart(csli == null
+            ? new DefaultXYDataset()
+            : generateDataset(csli.line, lastWaterLevel));
+
+        return new ChartPanel(chart);
+    }
+
+    protected void dumpData() {
+
+        CrossSectionLineItem csli =
+            (CrossSectionLineItem)crossSectionLinesCB.getSelectedItem();
+
+        if (csli == null) {
+            return;
+        }
+
+        CrossSectionLine line = csli.line;
+
+        double km = Math.round(line.getKm().doubleValue() * 1000d)/1000d;
+
+        String kmS = String.valueOf(km).replace(".", "-");
+
+        int i = 1;
+        File file = new File("cross-section-" + kmS + ".txt");
+        while (file.exists()) {
+            file = new File("cross-section-" + kmS + "[" + (i++) + "].txt");
+        }
+
+        System.err.println("dump points to file '" + file + "'");
+
+        List<CrossSectionPoint> points = line.getPoints();
+
+        PrintWriter out = null;
+
+        MathContext mc = new MathContext(3);
+
+        try {
+            out =
+                new PrintWriter(
+                new FileWriter(file));
+
+            for (CrossSectionPoint point: points) {
+                out.println(
+                    point.getX().round(mc) + " " +
+                    point.getY().round(mc));
+            }
+
+            out.flush();
+        }
+        catch (IOException ioe) {
+            ioe.printStackTrace();
+        }
+        finally {
+            if (out != null) {
+                out.close();
+            }
+        }
+    }
+
+    public static XYDataset generateDataset(
+        CrossSectionLine line,
+        Double           waterlevel
+    ) {
+        DefaultXYDataset dataset = new DefaultXYDataset();
+
+        List<CrossSectionPoint> ps = line.getPoints();
+
+        if (ps.isEmpty()) {
+            return dataset;
+        }
+
+        Collections.sort(ps, COL_POS_CMP);
+
+        List<Point2D> points = new ArrayList<Point2D>(ps.size());
+
+        for (CrossSectionPoint p: ps) {
+            double x = p.getX().doubleValue();
+            double y = p.getY().doubleValue();
+            if (isValid(x) && isValid(y)) {
+                points.add(new Point2D.Double(x, y));
+            }
+        }
+
+        if (points.isEmpty()) {
+            return dataset;
+        }
+
+        double [] xs = new double[points.size()];
+        double [] ys = new double[xs.length];
+
+        xs[0] = points.get(0).getX();
+        ys[0] = points.get(0).getY();
+
+        for (int i = 1; i < xs.length; ++i) {
+            Point2D p = points.get(i);
+            double x = p.getX();
+            double y = p.getY();
+
+            if (x <= xs[i-1]) {
+                x = xs[i-1] + EPSILON;
+            }
+            xs[i] = x;
+            ys[i] = y;
+        }
+
+        if (waterlevel != null) {
+            double [][] data = createWaterLines(points, waterlevel);
+            dataset.addSeries(String.valueOf(waterlevel), data);
+        }
+
+        CrossSection cs = line.getCrossSection();
+
+        String legend = (cs != null ? cs.getDescription() : "???")
+            + " " + Math.round(line.getKm().doubleValue() * 1000d)/1000d;
+
+        dataset.addSeries(legend, new double [][] { xs, ys });
+
+        return dataset;
+    }
+
+    public static double [][] createWaterLines(
+        List<Point2D> points,
+        double        waterlevel
+    ) {
+        List<Line2D> lines = Lines.fillWater(points, waterlevel);
+
+        TDoubleArrayList lxs = new TDoubleArrayList();
+        TDoubleArrayList lys = new TDoubleArrayList();
+
+        for (Iterator<Line2D> iter = lines.iterator(); iter.hasNext();) {
+            Line2D  l  = iter.next();
+            Point2D p1 = l.getP1();
+            Point2D p2 = l.getP2();
+            lxs.add(p1.getX());
+            lys.add(p1.getY());
+            lxs.add(p2.getX());
+            lys.add(p2.getY());
+            if (iter.hasNext()) {
+                lxs.add(Double.NaN);
+                lys.add(Double.NaN);
+            }
+        }
+
+        return new double [][] { lxs.toNativeArray(), lys.toNativeArray() };
+    }
+
+    protected void updateCrossSection(CrossSection crossSection) {
+        Object [] cslis = createCrossSectionLineItems(crossSection);
+        DefaultComboBoxModel dcbm = new DefaultComboBoxModel(cslis);
+        if (cslis.length > 0) {
+            dcbm.setSelectedItem(cslis[0]);
+        }
+        crossSectionLinesCB.setModel(dcbm);
+        if (cslis.length > 0) {
+            CrossSectionLine line =
+                ((CrossSectionLineItem)cslis[0]).line;
+        }
+        updateChart();
+    }
+
+    protected Object [] createCrossSectionLineItems(CrossSection cs) {
+        List<CrossSectionLine> lines = cs.getLines();
+        Object [] result = new Object[lines.size()];
+        for (int i = 0; i < result.length; ++i) {
+            result[i] = new CrossSectionLineItem(lines.get(i));
+        }
+        return result;
+    }
+
+
+    protected Object [] createCrossSectionItems() {
+        List<CrossSection> crossSections = crossSections(RIVER);
+        Object [] result = new Object[crossSections.size()];
+        for (int i = 0; i < result.length; ++i) {
+            result[i] = new CrossSectionItem(crossSections.get(i));
+        }
+        return result;
+    }
+
+    public static JFreeChart createChart(XYDataset dataset) {
+        JFreeChart chart = ChartFactory.createXYLineChart(
+            null,
+            "Abstand [m]",
+            "H\u00f6he [m]",
+            dataset,
+            PlotOrientation.VERTICAL,
+            true,
+            true,
+            false);
+
+        XYPlot plot = chart.getXYPlot();
+        NumberAxis yAxis = (NumberAxis)plot.getRangeAxis();
+        yAxis.setAutoRangeIncludesZero(false);
+
+        ChartUtilities.applyCurrentTheme(chart);
+        return chart;
+    }
+
+    public static void main(String [] args) {
+        CrossSectionApp csa = new CrossSectionApp("Querprofile");
+        csa.pack();
+        RefineryUtilities.centerFrameOnScreen(csa);
+        csa.setVisible(true);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,61 @@
+package de.intevation.flys.artifacts.context;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifactdatabase.DefaultArtifactContext;
+
+
+/**
+ * This class is used to store application wide information in a global context.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class FLYSContext extends DefaultArtifactContext {
+
+    /** The logger used in this class */
+    private static Logger logger = Logger.getLogger(FLYSContext.class);
+
+    /** The key that is used to store the TransitionEngine in the context */
+    public static final String TRANSITION_ENGINE_KEY =
+        "artifact.transition.engine";
+
+    /** The key that is used to store the StateEngine in the context */
+    public static final String STATE_ENGINE_KEY =
+        "artifact.state.engine";
+
+    /** The key that is used to store the Map of OutGenerator classes in the
+     * context.*/
+    public static final String OUTGENERATORS_KEY =
+        "flys.export.outgenerators";
+
+    /** The key that is used to store the map of themes in the context.*/
+    public static final String THEMES =
+        "flys.themes.map";
+
+    /** The key that is used to store a map of theme mappings in the context.*/
+    public static final String THEME_MAPPING =
+        "flys.themes.mapping.map";
+
+    /** The key that is used to store a map of WMS urls for each river.*/
+    public static final String RIVER_WMS =
+        "flys.floodmap.river.wms";
+
+
+    /**
+     * The default constructor.
+     */
+    public FLYSContext() {
+        super();
+    }
+
+
+    /**
+     * A constructor with a config document.
+     */
+    public FLYSContext(Document config) {
+        super(config);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,393 @@
+package de.intevation.flys.artifacts.context;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifacts.ArtifactContextFactory;
+import de.intevation.artifacts.GlobalContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.Config;
+
+import de.intevation.artifactdatabase.state.State;
+import de.intevation.artifactdatabase.state.StateEngine;
+import de.intevation.artifactdatabase.transition.Transition;
+import de.intevation.artifactdatabase.transition.TransitionEngine;
+
+import de.intevation.flys.artifacts.states.StateFactory;
+import de.intevation.flys.artifacts.transitions.TransitionFactory;
+import de.intevation.flys.themes.Theme;
+import de.intevation.flys.themes.ThemeFactory;
+
+
+/**
+ * The ArtifactContextFactory is used to initialize basic components and put
+ * them into the global context of the application.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class FLYSContextFactory implements ArtifactContextFactory {
+
+    /** The logger that is used in this class */
+    private static Logger logger = Logger.getLogger(FLYSContextFactory.class);
+
+    /** The XPath to the artifacts configured in the configuration. */
+    public static final String XPATH_ARTIFACTS =
+        "/artifact-database/artifacts/artifact";
+
+    /** The XPath to the name of the artifact. */
+    public static final String XPATH_ARTIFACT_NAME = "/artifact/@name";
+
+    /** The XPath to the xlink ref in an artifact configuration. */
+    public static final String XPATH_XLINK = "xlink:href";
+
+    /** The XPath to the transitions configured in the artifact config. */
+    public static final String XPATH_TRANSITIONS =
+        "/artifact/states/transition";
+
+    /** The XPath to the states configured in the artifact config. */
+    public static final String XPATH_STATES =
+        "/artifact/states/state";
+
+    public static final String XPATH_OUTPUT_GENERATORS =
+        "/artifact-database/output-generators/output-generator";
+
+    public static final String XPATH_THEME_CONFIG =
+        "/artifact-database/flys/themes/configuration/text()";
+
+    public static final String XPATH_THEMES =
+        "/themes/theme";
+
+    public static final String XPATH_THEME_MAPPINGS =
+        "/themes/mappings/mapping";
+
+    public static final String XPATH_RIVER_WMS =
+        "/artifact-database/floodmap/river";
+
+    /**
+     * Creates a new FLYSArtifactContext object and initialize all
+     * components required by the application.
+     *
+     * @param config The artifact server configuration.
+     * @return a FLYSArtifactContext.
+     */
+    public GlobalContext createArtifactContext(Document config) {
+        FLYSContext context = new FLYSContext(config);
+
+        configureTransitions(config, context);
+        configureStates(config, context);
+        configureOutGenerators(config, context);
+        configureThemes(config, context);
+        configureThemesMappings(config, context);
+        configureRiverWMS(config, context);
+
+        return context;
+    }
+
+
+    /**
+     * This method initializes the transition configuration.
+     *
+     * @param config the config document.
+     * @param context the FLYSContext.
+     */
+    protected void configureTransitions(Document config, FLYSContext context) {
+        TransitionEngine engine = new TransitionEngine();
+
+        Document[] artifacts = getArtifactConfigurations(config);
+        logger.info("Found " + artifacts.length + " artifacts in the config.");
+
+        for (Document doc: artifacts) {
+            List<Transition> transitions = new ArrayList<Transition>();
+
+            String artName = (String) XMLUtils.xpath(
+                doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING);
+
+            NodeList list = (NodeList) XMLUtils.xpath(
+                doc, XPATH_TRANSITIONS, XPathConstants.NODESET);
+
+            if (list == null) {
+                logger.warn("The artifact has no transitions configured.");
+                continue;
+            }
+
+            int trans = list.getLength();
+
+            logger.info(
+                "Artifact '" + artName + "' has " + trans + " transitions.");
+
+            for (int i = 0; i < trans; i++) {
+                Transition t = TransitionFactory.createTransition(list.item(i));
+                String     s = t.getFrom();
+                engine.addTransition(s, t);
+            }
+        }
+
+        context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine);
+    }
+
+
+    /**
+     * This method returns all artifact documents defined in
+     * <code>config</code>. <br>NOTE: The artifact configurations need to be
+     * stored in own files referenced by an xlink.
+     *
+     * @param config The global configuration.
+     *
+     * @return an array of Artifact configurations.
+     */
+    protected Document[] getArtifactConfigurations(Document config) {
+        NodeList artifacts = (NodeList) XMLUtils.xpath(
+            config, XPATH_ARTIFACTS, XPathConstants.NODESET);
+
+        int count = artifacts.getLength();
+
+        Document[] artifactDocs = new Document[count];
+
+        for (int i = 0; i < count; i++) {
+            Element tmp = (Element) artifacts.item(i);
+
+            String xlink = tmp.getAttribute(XPATH_XLINK);
+            xlink        = Config.replaceConfigDir(xlink);
+
+            File artifactFile = new File(xlink);
+            artifactDocs[i]   = XMLUtils.parseDocument(artifactFile);
+        }
+
+        return artifactDocs;
+    }
+
+
+    /**
+     * This method initializes the transition configuration.
+     *
+     * @param config the config document.
+     * @param context the FLYSContext.
+     */
+    protected void configureStates(Document config, FLYSContext context) {
+        StateEngine engine = new StateEngine();
+
+        Document[] artifacts = getArtifactConfigurations(config);
+        logger.info("Found " + artifacts.length + " artifacts in the config.");
+
+        for (Document doc: artifacts) {
+            List<State> states = new ArrayList<State>();
+
+            String artName = (String) XMLUtils.xpath(
+                doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING);
+
+            NodeList stateList = (NodeList) XMLUtils.xpath(
+                doc, XPATH_STATES, XPathConstants.NODESET);
+
+            if (stateList == null) {
+                logger.warn("The artifact has no states configured.");
+                continue;
+            }
+
+            int count = stateList.getLength();
+
+            logger.info(
+                "Artifact '" + artName + "' has " + count + " states.");
+
+            for (int i = 0; i < count; i++) {
+                states.add(StateFactory.createState(
+                    stateList.item(i)));
+            }
+
+            engine.addStates(artName, states);
+        }
+
+        context.put(FLYSContext.STATE_ENGINE_KEY, engine);
+    }
+
+
+    /**
+     * This method intializes the provided output generators.
+     *
+     * @param config the config document.
+     * @param context the FLYSContext.
+     */
+    protected void configureOutGenerators(Document config, FLYSContext context){
+        Map<String, Class> generators = new HashMap<String, Class>();
+
+        NodeList outGenerators = (NodeList) XMLUtils.xpath(
+            config,
+            XPATH_OUTPUT_GENERATORS,
+            XPathConstants.NODESET);
+
+        int num = outGenerators == null ? 0 : outGenerators.getLength();
+
+        if (num == 0) {
+            logger.warn("No output generators configured in this application.");
+            return;
+        }
+
+        logger.info("Found " + num + " configured output generators.");
+
+        int idx = 0;
+
+        for (int i = 0; i < num; i++) {
+            Node item = outGenerators.item(i);
+
+            String name = (String) XMLUtils.xpath(
+                item, "@name", XPathConstants.STRING);
+
+            String clazz = (String) XMLUtils.xpath(
+                item, "text()", XPathConstants.STRING);
+
+            if (name == null || clazz == null) {
+                continue;
+            }
+
+            try {
+                generators.put(name, Class.forName(clazz));
+
+                idx++;
+            }
+            catch (ClassNotFoundException cnfe) {
+                logger.warn(cnfe, cnfe);
+            }
+        }
+
+        logger.info("Successfully loaded " + idx + " output generators.");
+        context.put(FLYSContext.OUTGENERATORS_KEY, generators);
+    }
+
+
+    /**
+     * This methods reads the configured themes and puts them into the
+     * FLYSContext.
+     *
+     * @param config The global configuration.
+     * @param context The FLYSContext.
+     */
+    protected void configureThemes(Document config, FLYSContext context) {
+        logger.debug("FLYSContextFactory.configureThemes");
+
+        Document cfg = getThemeConfig(config);
+
+        NodeList themes = (NodeList) XMLUtils.xpath(
+            cfg, XPATH_THEMES, XPathConstants.NODESET);
+
+        int num = themes != null ? themes.getLength() : 0;
+
+        if (num == 0) {
+            logger.warn("There are no themes configured!");
+            return;
+        }
+
+        logger.debug("Found " + num + " configured themes.");
+
+        Map<String, Theme> theThemes = new HashMap<String, Theme>();
+
+        for (int i = 0; i < num; i++) {
+            Node theme = themes.item(i);
+
+            Theme theTheme = ThemeFactory.createTheme(cfg, theme);
+
+            if (theme != null) {
+                theThemes.put(theTheme.getName(), theTheme);
+            }
+        }
+
+        logger.debug("Initialized " + theThemes.size() + "/" + num + " themes");
+
+        context.put(FLYSContext.THEMES, theThemes);
+    }
+
+
+    /**
+     * This method is used to retrieve the theme configuration document.
+     *
+     * @param config The global configuration.
+     *
+     * @return the theme configuration.
+     */
+    protected Document getThemeConfig(Document config) {
+        String themeConfig = (String) XMLUtils.xpath(
+            config,
+            XPATH_THEME_CONFIG,
+            XPathConstants.STRING);
+
+        themeConfig = Config.replaceConfigDir(themeConfig);
+
+        logger.debug("Parse theme cfg: " + themeConfig);
+
+        return XMLUtils.parseDocument(new File(themeConfig));
+    }
+
+
+    protected void configureThemesMappings(Document cfg, FLYSContext context) {
+        logger.debug("FLYSContextFactory.configureThemesMappings");
+
+        Document config = getThemeConfig(cfg);
+
+        NodeList mappings = (NodeList) XMLUtils.xpath(
+            config, XPATH_THEME_MAPPINGS, XPathConstants.NODESET);
+
+        int num = mappings != null ? mappings.getLength() : 0;
+
+        if (num == 0) {
+            logger.warn("No theme <--> facet mappins found!");
+            return;
+        }
+
+        Map<String, String> mapping = new HashMap<String, String>();
+
+        for (int i = 0; i < num; i++) {
+            Node node = mappings.item(i);
+
+            String from = (String) XMLUtils.xpath(
+                node, "@from", XPathConstants.STRING);
+
+            String to = (String) XMLUtils.xpath(
+                node, "@to", XPathConstants.STRING);
+
+            if (from != null && to != null) {
+                mapping.put(from, to);
+            }
+        }
+
+        logger.debug("Found " + mapping.size() + " theme/facet mappings.");
+
+        context.put(FLYSContext.THEME_MAPPING, mapping);
+    }
+
+
+    protected void configureRiverWMS(Document cfg, FLYSContext context) {
+        Map<String, String> riverWMS = new HashMap<String, String>();
+
+        NodeList rivers = (NodeList) XMLUtils.xpath(
+            cfg, XPATH_RIVER_WMS, XPathConstants.NODESET);
+
+        int num = rivers != null ? rivers.getLength() : 0;
+
+        for (int i = 0; i < num; i++) {
+            Element e = (Element) rivers.item(i);
+
+            String river = e.getAttribute("name");
+            String url   = XMLUtils.xpathString(e, "river-wms/@url", null);
+
+            if (river != null && url != null) {
+                riverWMS.put(river, url);
+            }
+        }
+
+        logger.debug("Found " + riverWMS.size() + " river WMS.");
+
+        context.put(FLYSContext.RIVER_WMS, riverWMS);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,68 @@
+package de.intevation.flys.artifacts.context;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import org.hibernate.Session;
+
+import de.intevation.flys.backend.SessionHolder;
+
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallContext.Listener;
+
+
+/**
+ * This CallContextListener is used to initialize a ThreadLocal variable in
+ * each CallContext (for each request) that holds Sessions.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class SessionCallContextListener implements Listener {
+
+    public static final String SESSION_KEY = "context.session";
+
+    /** The logger that is used in this class.*/
+    private static Logger logger =
+        Logger.getLogger(SessionCallContextListener.class);
+
+
+    public SessionCallContextListener() {
+    }
+
+
+    public void setup(Document config, Node listenerConfig) {
+        // nothing to do here
+    }
+
+
+    /**
+     * Initializes a ThreadLocal variable that is used to hold sessions.
+     *
+     * @param context The CallContext.
+     */
+    public void init(CallContext context) {
+        logger.debug("SessionCallContextListener.init");
+
+        Session session = SessionHolder.acquire();
+
+        context.putContextValue(SESSION_KEY, session);
+    }
+
+
+    /**
+     * Closes open sessions of the ThreadLocal variable opened in init().
+     *
+     * @param context The CallContext.
+     */
+    public void close(CallContext context) {
+        logger.debug("SessionCallContextListener.close");
+
+        Session session = (Session)context.getContextValue(SESSION_KEY);
+        session.close();
+
+        SessionHolder.release();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/DBConfig.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,108 @@
+package de.intevation.flys.artifacts.datacage;
+
+import de.intevation.artifacts.common.utils.Config;
+
+import de.intevation.artifactdatabase.db.SQL;
+import de.intevation.artifactdatabase.db.DBConnection;
+
+import org.apache.log4j.Logger;
+
+public class DBConfig
+{ 
+    private static Logger logger = Logger.getLogger(DBConfig.class);
+
+     /**
+     * XPath to access the database driver within the global configuration.
+     */
+    public static final String DB_DRIVER =
+        "/artifact-database/datacage/driver/text()";
+    /**
+     * XPath to access the database URL within the global configuration.
+     */
+    public static final String DB_URL =
+        "/artifact-database/datacage/url/text()";
+    /**
+     * XPath to access the database use within the global configuration.
+     */
+    public static final String DB_USER =
+        "/artifact-database/datacage/user/text()";
+    /**
+     * XPath to access the database password within the global configuration.
+     */
+    public static final String DB_PASSWORD =
+        "/artifact-database/datacage/password/text()";
+
+    /**
+     * The default database driver: H2
+     */
+    public static final String DEFAULT_DRIVER =
+        "org.h2.Driver";
+
+    /**
+     * The default database user: ""
+     */
+    public static final String DEFAULT_USER = "";
+
+    /**
+     * The default database password: ""
+     */
+    public static final String DEFAULT_PASSWORD = "";
+
+
+    public static final String DEFAULT_URL =
+        "jdbc:h2:mem:datacage;INIT=RUNSCRIPT FROM '${artifacts.config.dir}/datacage.sql'";
+
+    public static final String RESOURCE_PATH = "/datacage-sql";
+
+    private static DBConfig instance;
+
+    protected DBConnection dbConnection;
+    protected SQL          sql;
+
+    public DBConfig() {
+    }
+
+    public DBConfig(DBConnection dbConnection, SQL sql) {
+        this.dbConnection = dbConnection;
+        this.sql          = sql;
+    }
+
+    public static synchronized DBConfig getInstance() {
+        if (instance == null) {
+            instance = createInstance();
+        }
+        return instance;
+    }
+
+    protected static DBConfig createInstance() {
+        String driver = Config.getStringXPath(
+            DB_DRIVER, DEFAULT_DRIVER);
+
+        String url = Config.getStringXPath(
+            DB_URL, DEFAULT_URL);
+
+        url = Config.replaceConfigDir(url);
+
+        String user = Config.getStringXPath(
+            DB_USER, DEFAULT_USER);
+
+        String password = Config.getStringXPath(
+            DB_PASSWORD, DEFAULT_PASSWORD);
+
+        DBConnection dbConnection = new DBConnection(
+            driver, url, user, password);
+
+        SQL sql = new SQL(DBConfig.class, RESOURCE_PATH, driver);
+
+        return new DBConfig(dbConnection, sql);
+    }
+
+    public DBConnection getDBConnection() {
+        return dbConnection;
+    }
+
+    public SQL getSQL() {
+        return sql;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,1069 @@
+package de.intevation.flys.artifacts.datacage;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Date;
+
+import java.sql.SQLException;
+import java.sql.PreparedStatement;
+import java.sql.Types;
+import java.sql.Timestamp;
+
+import de.intevation.artifacts.GlobalContext;
+import de.intevation.artifacts.ArtifactCollection;
+import de.intevation.artifacts.User;
+
+import de.intevation.artifactdatabase.db.SQL;
+import de.intevation.artifactdatabase.db.SQLExecutor;
+
+import de.intevation.artifactdatabase.LifetimeListener;
+import de.intevation.artifactdatabase.Backend;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifactdatabase.state.Output;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.artifacts.common.utils.LRUCache;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+public class Datacage
+implements   LifetimeListener
+{
+    private static Logger log = Logger.getLogger(Datacage.class);
+
+    public static final String DATACAGE_KEY =
+        "global.datacage.instance";
+
+    public static final String ARTEFACT_DATABASE_KEY =
+        "global.artifact.database";
+
+    private String SQL_DELETE_ALL_USERS      = "delete.all.users";
+    private String SQL_DELETE_ALL_ARTIFACTS  = "delete.all.artifacts";
+    private String SQL_USER_ID_NEXTVAL       = "user.id.nextval";
+    private String SQL_USER_BY_GID           = "user.by.gid";
+    private String SQL_INSERT_USER           = "insert.user";
+    private String SQL_COLLECTION_BY_GID     = "collection.by.gid";
+    private String SQL_COLLECTION_ID_NEXTVAL = "collection.id.nextval";
+    private String SQL_INSERT_COLLECTION     = "insert.collection";
+    private String SQL_ARTIFACT_BY_GID       = "artifact.by.gid";
+    private String SQL_COLLECTION_ITEM_ID_NEXTVAL =
+        "collection.item.id.nextval";
+    private String SQL_INSERT_COLLECTION_ITEM = "insert.collection.item";
+    private String SQL_ARTIFACT_ID_NEXTVAL    = "artifact.id.nextval";
+    private String SQL_INSERT_ARTIFACT        = "insert.artifact";
+    private String SQL_ARTIFACT_DATA_ID_NEXTVAL = "artifact.data.id.nextval";
+    private String SQL_INSERT_ARTIFACT_DATA   = "insert.artifact.data";
+    private String SQL_OUT_ID_NEXTVALUE       = "out.id.nextval";
+    private String SQL_INSERT_OUT             = "insert.out";
+    private String SQL_FACET_ID_NEXTVAL       = "facet.id.nextval";
+    private String SQL_INSERT_FACET           = "insert.facet";
+    private String SQL_UPDATE_COLLECTION_NAME = "update.collection.name";
+    private String SQL_DELETE_ARTIFACT_FROM_COLLECTION =
+        "delete.artifact.from.collection";
+    private String SQL_DELETE_COLLECTION_BY_GID =
+        "delete.collection.by.gid";
+    private String SQL_DELETE_USER_BY_GID = "delete.user.by.gid";
+    private String SQL_DELETE_ARTIFACT_DATA_BY_ARTIFACT_ID =
+        "delete.artifact.data.by.artifact.id";
+    private String SQL_DELETE_OUTS_BY_ARTIFACT_ID =
+        "delete.outs.by.artifact.id";
+    private String SQL_DELETE_FACETS_BY_ARTIFACT_ID =
+        "delete.facets.by.artifact.id";
+    private String SQL_DELETE_ARTIFACT_BY_GID =
+        "delete.artifact.by.gid";
+
+    protected SQLExecutor sqlExecutor;
+
+    public class InitialScan 
+    implements   ArtifactDatabase.ArtifactLoadedCallback
+    {
+        protected LRUCache<String, Integer> users;
+        protected LRUCache<String, Integer> collections;
+        protected LRUCache<String, Integer> artifacts;
+
+        protected GlobalContext context;
+
+        public InitialScan() {
+            users       = new LRUCache<String, Integer>();
+            collections = new LRUCache<String, Integer>();
+            artifacts   = new LRUCache<String, Integer>();
+        }
+
+        public InitialScan(GlobalContext context) {
+            this();
+            this.context = context;
+        }
+
+        @Override
+        public void artifactLoaded(
+            String   userId,
+            String   collectionId,
+            String   collectionName,
+            Date     collectionCreated,
+            String   artifactId,
+            Date     artifactCreated,
+            Artifact artifact
+        ) {
+            if (!(artifact instanceof FLYSArtifact)) {
+                log.warn("ignoring none FLYS artifacts");
+                return;
+            }
+
+            FLYSArtifact flysArtifact = (FLYSArtifact)artifact;
+
+            Integer uId = getUserId(userId);
+            Integer cId = getCollectionId(
+                collectionId, uId, collectionName, collectionCreated);
+
+            storeArtifact(artifactId, cId, flysArtifact, artifactCreated);
+        }
+
+        protected Integer getId(
+            LRUCache<String, Integer> cache,
+            final String              idString,
+            final String              selectById
+        ) {
+            Integer id = cache.get(idString);
+            if (id != null) {
+                return id;
+            }
+
+            final Integer [] res = new Integer[1];
+
+            SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+                @Override
+                public boolean doIt() throws SQLException {
+                    prepareStatement(selectById);
+                    stmnt.setString(1, idString);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        return false;
+                    }
+                    res[0] = result.getInt(1);
+                    return true;
+                }
+            };
+
+            if (exec.runRead()) {
+                cache.put(idString, res[0]);
+                return res[0];
+            }
+
+            return null;
+        }
+
+        protected void storeArtifact(
+            final String       artifactId,
+            Integer            collectionId,
+            final FLYSArtifact artifact,
+            final Date         artifactCreated
+        ) {
+            Integer aId = getId(artifacts, artifactId, SQL_ARTIFACT_BY_GID);
+
+            if (aId != null) {
+                // We've already stored it. Just create the collection item.
+                storeCollectionItem(collectionId, aId);
+                return;
+            }
+            // We need to write it to database
+
+            final Integer [] res = new Integer[1];
+
+            SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+                @Override
+                public boolean doIt() throws SQLException {
+                    prepareStatement(SQL_ARTIFACT_ID_NEXTVAL);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        return false;
+                    }
+                    res[0] = result.getInt(1);
+                    reset();
+                    prepareStatement(SQL_INSERT_ARTIFACT);
+                    stmnt.setInt   (1, res[0]);
+                    stmnt.setString(2, artifactId);
+                    stmnt.setString(3, artifact.getCurrentStateId());
+                    Timestamp timestamp = new Timestamp(artifactCreated != null
+                        ? artifactCreated.getTime()
+                        : System.currentTimeMillis());
+                    stmnt.setTimestamp(4, timestamp);
+                    stmnt.execute();
+                    conn.commit();
+                    return true;
+                }
+            };
+
+            if (!exec.runWrite()) {
+                log.error("storing of artifact failed.");
+                return;
+            }
+
+            artifacts.put(artifactId, aId = res[0]);
+
+            storeCollectionItem(collectionId, aId);
+
+            storeData(aId, artifact);
+
+            storeOuts(aId, artifact, context);
+        }
+
+
+        protected void storeCollectionItem(
+            final Integer collectionId,
+            final Integer artifactId
+        ) {
+            SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+                @Override
+                public boolean doIt() throws SQLException {
+                    prepareStatement(SQL_COLLECTION_ITEM_ID_NEXTVAL);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        return false;
+                    }
+                    int ciId = result.getInt(1);
+                    reset();
+                    prepareStatement(SQL_INSERT_COLLECTION_ITEM);
+                    stmnt.setInt(1, ciId);
+                    stmnt.setInt(2, collectionId);
+                    stmnt.setInt(3, artifactId);
+                    stmnt.execute();
+                    conn.commit();
+                    return true;
+                }
+            };
+
+            if (!exec.runWrite()) {
+                log.error("storing of collection item failed.");
+            }
+        }
+
+        protected Integer getCollectionId(
+            final String  collectionId,
+            final Integer ownerId,
+            final String  collectionName,
+            final Date    collectionCreated
+        ) {
+            Integer c = getId(collections, collectionId, SQL_COLLECTION_BY_GID);
+
+            if (c != null) {
+                return c;
+            }
+
+            final Integer [] res = new Integer[1];
+
+            SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+                @Override
+                public boolean doIt() throws SQLException {
+                    prepareStatement(SQL_COLLECTION_ID_NEXTVAL);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        return false;
+                    }
+                    res[0] = result.getInt(1);
+                    reset();
+                    prepareStatement(SQL_INSERT_COLLECTION);
+                    stmnt.setInt   (1, res[0]);
+                    stmnt.setString(2, collectionId);
+                    stmnt.setInt   (3, ownerId);
+                    setString(stmnt, 4, collectionName);
+                    Timestamp timestamp = new Timestamp(collectionCreated != null
+                        ? collectionCreated.getTime()
+                        : System.currentTimeMillis());
+                    stmnt.setTimestamp(5, timestamp);
+                    stmnt.execute();
+                    conn.commit();
+                    return true;
+                }
+            };
+
+            if (exec.runWrite()) {
+                collections.put(collectionId, res[0]);
+                return res[0];
+            }
+
+            return null;
+        }
+
+        protected Integer getUserId(final String userId) {
+
+            Integer u = getId(users, userId, SQL_USER_BY_GID);
+
+            if (u != null) {
+                return u;
+            }
+
+            final Integer [] res = new Integer[1];
+
+            SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+                @Override
+                public boolean doIt() throws SQLException {
+                    prepareStatement(SQL_USER_ID_NEXTVAL);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        return false;
+                    }
+                    res[0] = result.getInt(1);
+                    reset();
+                    prepareStatement(SQL_INSERT_USER);
+                    stmnt.setInt   (1, res[0]);
+                    stmnt.setString(2, userId);
+                    stmnt.execute();
+                    conn.commit();
+                    return true;
+                }
+            };
+
+            if (exec.runWrite()) {
+                users.put(userId, res[0]);
+                return res[0];
+            }
+
+            return null;
+        }
+
+        public boolean scan(ArtifactDatabase adb) {
+            log.debug("scan");
+            try {
+                adb.loadAllArtifacts(this);
+            }
+            catch (ArtifactDatabaseException ade) {
+                log.error(ade);
+                return false;
+            }
+            return true;
+        }
+    } // class InitialScan
+
+
+    public Datacage() {
+    }
+
+    @Override
+    public void setup(Document document) {
+        log.debug("setup");
+        DBConfig config = DBConfig.getInstance();
+        setupSQL(config.getSQL());
+        sqlExecutor = new SQLExecutor(config.getDBConnection());
+    }
+
+    protected void setupSQL(SQL sql) {
+        SQL_DELETE_ALL_USERS      = sql.get(SQL_DELETE_ALL_USERS);
+        SQL_DELETE_ALL_ARTIFACTS  = sql.get(SQL_DELETE_ALL_ARTIFACTS);
+        SQL_USER_ID_NEXTVAL       = sql.get(SQL_USER_ID_NEXTVAL);
+        SQL_USER_BY_GID           = sql.get(SQL_USER_BY_GID);
+        SQL_INSERT_USER           = sql.get(SQL_INSERT_USER);
+        SQL_COLLECTION_BY_GID     = sql.get(SQL_COLLECTION_BY_GID);
+        SQL_COLLECTION_ID_NEXTVAL = sql.get(SQL_COLLECTION_ID_NEXTVAL);
+        SQL_INSERT_COLLECTION     = sql.get(SQL_INSERT_COLLECTION);
+        SQL_ARTIFACT_BY_GID       = sql.get(SQL_ARTIFACT_BY_GID);
+        SQL_COLLECTION_ITEM_ID_NEXTVAL =
+            sql.get(SQL_COLLECTION_ITEM_ID_NEXTVAL);
+        SQL_INSERT_COLLECTION_ITEM =
+            sql.get(SQL_INSERT_COLLECTION_ITEM);
+        SQL_ARTIFACT_ID_NEXTVAL = sql.get(SQL_ARTIFACT_ID_NEXTVAL);
+        SQL_INSERT_ARTIFACT     = sql.get(SQL_INSERT_ARTIFACT);
+        SQL_ARTIFACT_DATA_ID_NEXTVAL = sql.get(SQL_ARTIFACT_DATA_ID_NEXTVAL);
+        SQL_INSERT_ARTIFACT_DATA = sql.get(SQL_INSERT_ARTIFACT_DATA);
+        SQL_OUT_ID_NEXTVALUE     = sql.get(SQL_OUT_ID_NEXTVALUE);
+        SQL_INSERT_OUT           = sql.get(SQL_INSERT_OUT);
+        SQL_FACET_ID_NEXTVAL     = sql.get(SQL_FACET_ID_NEXTVAL);
+        SQL_INSERT_FACET         = sql.get(SQL_INSERT_FACET);
+        SQL_UPDATE_COLLECTION_NAME = sql.get(SQL_UPDATE_COLLECTION_NAME);
+        SQL_DELETE_ARTIFACT_FROM_COLLECTION =
+            sql.get(SQL_DELETE_ARTIFACT_FROM_COLLECTION);
+        SQL_DELETE_COLLECTION_BY_GID = sql.get(SQL_DELETE_COLLECTION_BY_GID);
+        SQL_DELETE_USER_BY_GID       = sql.get(SQL_DELETE_USER_BY_GID);
+        SQL_DELETE_ARTIFACT_DATA_BY_ARTIFACT_ID =
+            sql.get(SQL_DELETE_ARTIFACT_DATA_BY_ARTIFACT_ID);
+        SQL_DELETE_OUTS_BY_ARTIFACT_ID =
+            sql.get(SQL_DELETE_OUTS_BY_ARTIFACT_ID);
+        SQL_DELETE_FACETS_BY_ARTIFACT_ID =
+            sql.get(SQL_DELETE_FACETS_BY_ARTIFACT_ID);
+        SQL_DELETE_ARTIFACT_BY_GID =
+            sql.get(SQL_DELETE_ARTIFACT_BY_GID);
+    }
+
+    protected static final int numFacets(List<Output> outs) {
+        int sum = 0;
+        for (Output out: outs) {
+            sum += out.getFacets().size();
+        }
+        return sum;
+    }
+
+    protected static final void setString(
+        PreparedStatement stmnt, 
+        int               index,
+        Object            value
+    ) 
+    throws SQLException
+    {
+        if (value == null) {
+            stmnt.setNull(index, Types.VARCHAR);
+        }
+        else {
+            stmnt.setString(index, value.toString());
+        }
+    }
+
+    @Override
+    public void systemUp(GlobalContext context) {
+        log.debug("systemUp entered");
+        initialScan(context);
+        context.put(DATACAGE_KEY, this);
+        log.debug("systemUp leaved");
+    }
+
+    protected void initialScan(GlobalContext context) {
+        log.debug("initialScan");
+
+        Object adbObject = context.get(ARTEFACT_DATABASE_KEY);
+
+        if (!(adbObject instanceof ArtifactDatabase)) {
+            log.error("missing artefact database. Cannot scan");
+            return;
+        }
+
+        ArtifactDatabase adb = (ArtifactDatabase)adbObject;
+
+        if (!cleanDatabase()) {
+            log.error("cleaning database failed");
+            return;
+        }
+
+        InitialScan is = new InitialScan(context);
+
+        if (!is.scan(adb)) {
+            log.error("initial scan failed");
+            return;
+        }
+
+    }
+
+    protected boolean cleanDatabase() {
+
+        log.debug("cleanDatabase");
+
+        boolean success = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_ALL_USERS);
+                stmnt.execute();
+                prepareStatement(SQL_DELETE_ALL_ARTIFACTS);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        }.runWrite();
+
+        log.debug("after runWrite(): " + success);
+
+        return success;
+    }
+
+
+    @Override
+    public void systemDown(GlobalContext context) {
+        log.debug("systemDown");
+    }
+
+    public void setup(GlobalContext globalContext) {
+        log.debug("setup");
+    }
+
+    public void createdArtifact(
+        Artifact      artifact, 
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("createdArtifact");
+
+        if (!(artifact instanceof FLYSArtifact)) {
+            log.warn("need FLYSArtifact here");
+            return;
+        }
+
+        final FLYSArtifact flys = (FLYSArtifact)artifact;
+
+        final int [] res = new int[1];
+
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_ARTIFACT_ID_NEXTVAL);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    log.error("id generation for artifact failed");
+                    return false;
+                }
+                res[0] = result.getInt(1);
+                reset();
+                prepareStatement(SQL_INSERT_ARTIFACT);
+                stmnt.setInt      (1, res[0]);
+                stmnt.setString   (2, flys.identifier());
+                stmnt.setString   (3, flys.getCurrentStateId());
+                stmnt.setTimestamp(4,
+                    new Timestamp(System.currentTimeMillis()));
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("storing of artifact failed.");
+            return;
+        }
+
+        storeData(res[0], flys);
+        storeOuts(res[0], flys, context);
+    }
+
+    public void storedArtifact(
+        Artifact      artifact,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("storedArtifact");
+        if (!(artifact instanceof FLYSArtifact)) {
+            log.warn("need FLYSArtifact here");
+            return;
+        }
+
+        final FLYSArtifact flys = (FLYSArtifact)artifact;
+
+        final Integer [] res = new Integer[1];
+
+        // check first if artifact already exists
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_ARTIFACT_BY_GID);
+                stmnt.setString(1, flys.identifier());
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    // new artifact
+                    return true;
+                }
+                res[0] = result.getInt(1);
+                return true;
+            }
+        };
+
+        if (!exec.runRead()) {
+            log.error("querying artifact failed");
+            return;
+        }
+
+        if (res[0] == null) { // new artifact
+            createdArtifact(artifact, backend, context);
+            return;
+        }
+
+        // artifact already exists -> delete old data
+        exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_ARTIFACT_DATA_BY_ARTIFACT_ID);
+                stmnt.setInt(1, res[0]);
+                stmnt.execute();
+                prepareStatement(SQL_DELETE_FACETS_BY_ARTIFACT_ID);
+                stmnt.setInt(1, res[0]);
+                stmnt.execute();
+                prepareStatement(SQL_DELETE_OUTS_BY_ARTIFACT_ID);
+                stmnt.setInt(1, res[0]);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("deleting old artifact data failed");
+            return;
+        }
+
+        // write new data
+        storeData(res[0], flys);
+        storeOuts(res[0], flys, context);
+    }
+
+    public void createdUser(
+        final User    user,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("createdUser");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_USER_ID_NEXTVAL);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    log.error("id generation for user failed");
+                    return false;
+                }
+                int uId = result.getInt(1);
+                reset();
+                prepareStatement(SQL_INSERT_USER);
+                stmnt.setInt(1, uId);
+                stmnt.setString(2, user.identifier());
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("create user failed");
+        }
+    }
+
+    public void deletedUser(
+        final String  identifier,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("deletedUser");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_USER_BY_GID);
+                stmnt.setString(1, identifier);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("delete user failed");
+        }
+    }
+
+    public void createdCollection(
+        final ArtifactCollection collection,
+        Backend                  backend,
+        GlobalContext            context
+    ) {
+        log.debug("createdCollection");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                String userId = collection.getUser().identifier();
+                prepareStatement(SQL_USER_BY_GID);
+                stmnt.setString(1, userId);
+                result = stmnt.executeQuery();
+                int uId;
+                if (result.next()) {
+                    uId = result.getInt(1);
+                    reset();
+                }
+                else {
+                    // need to create user first
+                    reset();
+                    prepareStatement(SQL_USER_ID_NEXTVAL);
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        log.error("id generation for user failed");
+                        return false;
+                    }
+                    uId = result.getInt(1);
+                    reset();
+                    prepareStatement(SQL_INSERT_USER);
+                    stmnt.setInt(1, uId);
+                    stmnt.setString(2, userId);
+                    stmnt.execute();
+                    conn.commit();
+                    reset();
+                }
+
+                prepareStatement(SQL_COLLECTION_ID_NEXTVAL);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    log.error("id generation for collection failed");
+                    return false;
+                }
+                int cId = result.getInt(1);
+                reset();
+
+                String identifier = collection.identifier();
+                String name       = collection.getName();
+
+                prepareStatement(SQL_INSERT_COLLECTION);
+                stmnt.setInt(1, cId);
+                stmnt.setString(2, identifier);
+                stmnt.setInt(3, uId);
+                setString(stmnt, 4, name);
+                stmnt.setTimestamp(5,
+                    new Timestamp(System.currentTimeMillis()));
+                stmnt.execute();
+
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("create collection failed");
+        }
+    }
+
+    public void deletedCollection(
+        final String  identifier,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("deletedCollection");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_COLLECTION_BY_GID);
+                stmnt.setString(1, identifier);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("delete collection failed");
+        }
+    }
+
+    public void changedCollectionAttribute(
+        String        identifier,
+        Document      document,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("changedCollectionAttribute");
+    }
+
+    public void changedCollectionItemAttribute(
+        String        collectionId,
+        String        artifactId,
+        Document      document,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("changedCollectionItemAttribute");
+    }
+
+    public void addedArtifactToCollection(
+        final String  artifactId,
+        final String  collectionId,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("addedArtifactToCollection");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_ARTIFACT_BY_GID);
+                stmnt.setString(1, artifactId);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    return false;
+                }
+                int aId = result.getInt(1);
+                reset();
+
+                prepareStatement(SQL_COLLECTION_BY_GID);
+                stmnt.setString(1, collectionId);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    return false;
+                }
+                int cId = result.getInt(1);
+                reset();
+
+                prepareStatement(SQL_COLLECTION_ITEM_ID_NEXTVAL);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    return false;
+                }
+                int ciId = result.getInt(1);
+                reset();
+
+                prepareStatement(SQL_INSERT_COLLECTION_ITEM);
+                stmnt.setInt(1, ciId);
+                stmnt.setInt(2, cId);
+                stmnt.setInt(3, aId);
+                stmnt.execute();
+
+                conn.commit();
+                return true;
+            }
+        };
+        if (!exec.runWrite()) {
+            log.error("added artifact to collection failed");
+        }
+    }
+
+    public void removedArtifactFromCollection(
+        final String  artifactId,
+        final String  collectionId,
+        Backend       backend,
+        GlobalContext context
+    ) {
+        log.debug("removedArtifactFromCollection");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_ARTIFACT_BY_GID);
+                stmnt.setString(1, artifactId);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    return false;
+                }
+                int aId = result.getInt(1);
+                reset();
+                prepareStatement(SQL_COLLECTION_BY_GID);
+                stmnt.setString(1, collectionId);
+                result = stmnt.executeQuery();
+                if (!result.next()) {
+                    return false;
+                }
+                int cId = result.getInt(1);
+                reset();
+                prepareStatement(SQL_DELETE_ARTIFACT_FROM_COLLECTION);
+                stmnt.setInt(1, cId);
+                stmnt.setInt(2, aId);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+        if (!exec.runWrite()) {
+            log.error("removing artifact from collection failed");
+        }
+    }
+
+    public void setCollectionName(
+        final String  collectionId,
+        final String  name,
+        GlobalContext context
+    ) {
+        log.debug("setCollectionName");
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_UPDATE_COLLECTION_NAME);
+                stmnt.setString(1, name);
+                stmnt.setString(2, collectionId);
+                stmnt.execute();
+                conn.commit();
+                return true;
+            }
+        };
+        if (!exec.runWrite()) {
+            log.error("changing name failed");
+        }
+    }
+
+    protected void storeData(
+        final int     artifactId,
+        FLYSArtifact  artifact
+    ) {
+        final Collection<StateData> data = artifact.getAllData();
+
+        if (data.isEmpty()) {
+            return;
+        }
+
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                int [] ids = new int[data.size()];
+                prepareStatement(SQL_ARTIFACT_DATA_ID_NEXTVAL);
+
+                for (int i = 0; i < ids.length; ++i) {
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        log.error("generating id for artifact data failed");
+                        return false;
+                    }
+                    ids[i] = result.getInt(1);
+                    result.close(); result = null;
+                }
+                reset();
+                prepareStatement(SQL_INSERT_ARTIFACT_DATA);
+
+                int i = 0;
+                for (StateData sd: data) {
+                    int id = ids[i++];
+                    stmnt.setInt(1, id);
+                    stmnt.setInt(2, artifactId);
+                    // XXX: Where come the nulls from?
+                    String type = sd.getType();
+                    if (type == null) type = "String";
+                    stmnt.setString(3, type);
+                    stmnt.setString(4, sd.getName());
+                    setString(stmnt, 5, sd.getValue());
+                    stmnt.execute();
+                }
+
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("storing artifact data failed");
+        }
+    }
+
+    protected void storeOuts(
+        final int          artifactId,
+        final FLYSArtifact artifact,
+        GlobalContext      context
+    ) {
+        final List<Output> outs = artifact.getOutputs(context);
+
+        if (outs.isEmpty()) {
+            return;
+        }
+
+        final int [] outIds = new int[outs.size()];
+
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_OUT_ID_NEXTVALUE);
+                for (int i = 0; i < outIds.length; ++i) {
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        log.error("generation of out ids failed");
+                        return false;
+                    }
+                    outIds[i] = result.getInt(1);
+                    result.close(); result = null;
+                }
+                reset();
+                prepareStatement(SQL_INSERT_OUT);
+                for (int i = 0; i < outIds.length; ++i) {
+                    Output out = outs.get(i);
+                    stmnt.setInt(1, outIds[i]);
+                    stmnt.setInt(2, artifactId);
+                    stmnt.setString(3, out.getName());
+                    setString(stmnt, 4, out.getDescription());
+                    setString(stmnt, 5, out.getType());
+                    stmnt.execute();
+                }
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("storing artifact outs failed");
+            return;
+        }
+
+        final int FACETS = numFacets(outs);
+
+        if (FACETS == 0) {
+            return;
+        }
+
+        exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                int [] facetIds = new int[FACETS];
+                prepareStatement(SQL_FACET_ID_NEXTVAL);
+                for (int i = 0; i < facetIds.length; ++i) {
+                    result = stmnt.executeQuery();
+                    if (!result.next()) {
+                        log.error("generation of facet ids failed");
+                        return false;
+                    }
+                    facetIds[i] = result.getInt(1);
+                    result.close(); result = null;
+                }
+                reset();
+                prepareStatement(SQL_INSERT_FACET);
+                int index = 0;
+                for (int i = 0, N = outs.size(); i < N; ++i) {
+                    Output out = outs.get(i);
+                    int outId = outIds[i];
+                    for (Facet facet: out.getFacets()) {
+                        stmnt.setInt(1, facetIds[index]);
+                        stmnt.setInt(2, outId);
+                        stmnt.setString(3, facet.getName());
+                        stmnt.setInt(4, facet.getIndex());
+                        stmnt.setString(5, "XXX"); // TODO: handle states
+                        setString(stmnt, 6, facet.getDescription());
+                        stmnt.execute();
+                        ++index;
+                    }
+                }
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("storing facets failed");
+        }
+    }
+
+    public void killedCollections(
+        final List<String> identifiers,
+        GlobalContext      context
+    ) {
+        log.debug("killedCollections");
+
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_COLLECTION_BY_GID);
+                for (String identifier: identifiers) {
+                    stmnt.setString(1, identifier);
+                    stmnt.execute();
+                }
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("killing collections failed");
+        }
+    }
+
+    public void killedArtifacts(
+        final List<String> identifiers,
+        GlobalContext      context
+    ) {
+        log.debug("killedArtifacts");
+
+        SQLExecutor.Instance exec = sqlExecutor.new Instance() {
+            @Override
+            public boolean doIt() throws SQLException {
+                prepareStatement(SQL_DELETE_ARTIFACT_BY_GID);
+                for (String identifier: identifiers) {
+                    stmnt.setString(1, identifier);
+                    stmnt.execute();
+                }
+                conn.commit();
+                return true;
+            }
+        };
+
+        if (!exec.runWrite()) {
+            log.error("killing artifacts failed");
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,190 @@
+package de.intevation.flys.artifacts.datacage;
+
+import java.util.List;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactCollection;
+import de.intevation.artifacts.GlobalContext;
+import de.intevation.artifacts.User;
+
+import de.intevation.artifactdatabase.BackendListener;
+import de.intevation.artifactdatabase.Backend;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+public class DatacageBackendListener
+implements   BackendListener
+{
+    private static Logger log =
+        Logger.getLogger(DatacageBackendListener.class);
+
+    protected GlobalContext context;
+
+    public DatacageBackendListener() {
+        log.debug("new DatacageBackendListener");
+    }
+
+    protected Datacage getDatacage() {
+        Object listener = context.get(Datacage.DATACAGE_KEY);
+        return listener instanceof Datacage
+            ? (Datacage)listener
+            : null;
+    }
+
+    @Override
+    public void setup(GlobalContext context) {
+        log.debug("setup");
+        this.context = context;
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.setup(context);
+        }
+    }
+
+    @Override
+    public void createdArtifact(Artifact artifact, Backend backend) {
+        log.debug("createdArtifact");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.createdArtifact(artifact, backend, context);
+        }
+    }
+
+    @Override
+    public void storedArtifact(Artifact artifact, Backend backend) {
+        log.debug("storedArtifact");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.storedArtifact(artifact, backend, context);
+        }
+    }
+
+    @Override
+    public void createdUser(User user, Backend backend) {
+        log.debug("createdUser");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.createdUser(user, backend, context);
+        }
+    }
+
+    @Override
+    public void deletedUser(String identifier, Backend backend) {
+        log.debug("deletedUser");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.deletedUser(identifier, backend, context);
+        }
+    }
+
+    @Override
+    public void createdCollection(
+        ArtifactCollection collection,
+        Backend            backend
+    ) {
+        log.debug("createdCollection");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.createdCollection(collection, backend, context);
+        }
+    }
+
+    @Override
+    public void deletedCollection(String identifier, Backend backend) {
+        log.debug("deletedCollection");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.deletedCollection(identifier, backend, context);
+        }
+    }
+
+    @Override
+    public void changedCollectionAttribute(
+        String   identifier,
+        Document document,
+        Backend  backend
+    ) {
+        log.debug("changedCollectionAttribute");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.changedCollectionAttribute(
+                identifier, document, backend, context);
+        }
+    }
+
+    @Override
+    public void changedCollectionItemAttribute(
+        String   collectionId,
+        String   artifactId,
+        Document document,
+        Backend  backend
+    ) {
+        log.debug("changedCollectionItemAttribute");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.changedCollectionItemAttribute(
+                collectionId, artifactId, document, backend, context);
+        }
+    }
+
+    @Override
+    public void addedArtifactToCollection(
+        String  artifactId,
+        String  collectionId,
+        Backend backend
+    ) {
+        log.debug("addedArtifactToCollection");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.addedArtifactToCollection(
+                artifactId, collectionId, backend, context);
+        }
+    }
+
+    @Override
+    public void removedArtifactFromCollection(
+        String  artifactId,
+        String  collectionId,
+        Backend backend
+    ) {
+        log.debug("removedArtifactFromCollection");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.removedArtifactFromCollection(
+                artifactId, collectionId, backend, context);
+        }
+    }
+
+    @Override
+    public void setCollectionName(
+        String collectionId,
+        String name
+    ) {
+        log.debug("setCollectionName");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.setCollectionName(collectionId, name, context);
+        }
+    }
+
+    @Override
+    public void killedCollections(List<String> identifiers, Backend backend) {
+        log.debug("killedCollections");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.killedCollections(identifiers, context);
+        }
+    }
+
+    @Override
+    public void killedArtifacts(List<String> identifiers, Backend backend) {
+        log.debug("killedArtifacts");
+        Datacage l = getDatacage();
+        if (l != null) {
+            l.killedArtifacts(identifiers, context);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,281 @@
+package de.intevation.flys.artifacts.datacage;
+
+import java.util.Map;
+import java.util.HashMap;
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.File;
+
+import java.io.FileInputStream;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import org.hibernate.Session;
+
+import org.hibernate.jdbc.Work;
+
+import de.intevation.artifacts.common.utils.Config;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.backend.SessionHolder;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.datacage.templating.Builder;
+
+public class Recommendations
+{
+    private static Logger log = Logger.getLogger(Recommendations.class);
+
+    private static final boolean DEVELOPMENT_MODE =
+        Boolean.getBoolean("flys.datacage.recommendations.development");
+
+    public static final String XPATH_TEMPLATE =
+        "/artifact-database/metadata/template/text()";
+
+    public static final String DEFAULT_TEMPLATE_PATH =
+        "${artifacts.config.dir}/meta-data.xml";
+
+    private static Recommendations INSTANCE;
+
+    public static class BuilderProvider
+    {
+        protected Builder builder;
+
+        public BuilderProvider() {
+        }
+
+        public BuilderProvider(Builder builder) {
+            this.builder = builder;
+        }
+
+        public Builder getBuilder() {
+            return builder;
+        }
+    } // class BuilderProvider
+
+    public static class FileBuilderProvider
+    extends             BuilderProvider
+    {
+        protected File file;
+        protected long lastModified;
+
+        public FileBuilderProvider() {
+        }
+
+        public FileBuilderProvider(File file) {
+            this.file    = file;
+            lastModified = Long.MIN_VALUE;
+        }
+
+        @Override
+        public synchronized Builder getBuilder() {
+            long modified = file.lastModified();
+            if (modified > lastModified) {
+                lastModified = modified;
+                try {
+                    Document template = loadTemplate(file);
+                    builder = new Builder(template);
+                }
+                catch (IOException ioe) {
+                    log.error(ioe);
+                }
+            }
+            return builder;
+        }
+
+        public BuilderProvider toStaticProvider() {
+            return new BuilderProvider(builder);
+        }
+    } // class BuilderProvider
+
+    protected BuilderProvider builderProvider;
+
+    public Recommendations() {
+    }
+
+    public Recommendations(BuilderProvider builderProvider) {
+        this.builderProvider = builderProvider;
+    }
+
+    public Builder getBuilder() {
+        return builderProvider.getBuilder();
+    }
+
+    protected static void artifactToParameters(
+        FLYSArtifact        artifact, 
+        Map<String, Object> parameters
+    ) {
+        parameters.put("current-state-id", artifact.getCurrentStateId());
+        parameters.put("artifact-id",      artifact.identifier());
+
+        for (StateData sd: artifact.getAllData()) {
+            Object value = sd.getValue();
+            if (value == null) {
+                continue;
+            }
+            String key = sd.getName().replace('.', '-');
+            parameters.put(key, value);
+        }
+    }
+
+    public void  recommend(
+        FLYSArtifact        artifact,
+        String              userId,
+        String []           outs,
+        Map<String, Object> extraParameters,
+        Node                result
+    ) {
+        Map<String, Object> parameters = new HashMap<String, Object>();
+
+        if (extraParameters != null) {
+            parameters.putAll(extraParameters);
+        }
+
+        if (userId != null) {
+            parameters.put("user-id", userId);
+        }
+
+        if (artifact != null) {
+            artifactToParameters(artifact, parameters);
+        }
+
+        parameters.put("artifact-outs", outs);
+
+        parameters.put("parameters", parameters);
+
+        recommend(parameters, userId, result);
+    }
+
+    public void recommend(
+        Map<String, Object> parameters,
+        String              userId,
+        Node                result
+    ) {
+        recommend(parameters, userId, result, SessionHolder.HOLDER.get());
+    }
+
+    public void recommend(
+        final Map<String, Object> parameters,
+        final String              userId,
+        final Node                result,
+        Session                   session
+    ) {
+        session.doWork(new Work() {
+            @Override
+            public void execute(Connection systemConnection)
+            throws SQLException
+            {
+                List<Builder.NamedConnection> connections =
+                    new ArrayList<Builder.NamedConnection>(2);
+
+                Connection userConnection = userId != null
+                    ? DBConfig
+                        .getInstance()
+                        .getDBConnection()
+                        .getDataSource()
+                        .getConnection()
+                    : null;
+
+                try {
+                    if (userConnection != null) {
+                        connections.add(new Builder.NamedConnection(
+                            Builder.CONNECTION_USER, userConnection, false));
+                    }
+
+                    connections.add(new Builder.NamedConnection(
+                        Builder.CONNECTION_SYSTEM, systemConnection, true));
+
+                    getBuilder().build(connections, result, parameters);
+                }
+                finally {
+                    if (userConnection != null) {
+                        userConnection.close();
+                    }
+                }
+            }
+        });
+    }
+
+    public static synchronized Recommendations getInstance() {
+        if (INSTANCE == null) {
+            INSTANCE = createRecommendations();
+        }
+        return INSTANCE;
+    }
+
+    protected static Document loadTemplate(File file) throws IOException {
+        InputStream in = null;
+
+        try {
+            in = new FileInputStream(file);
+
+            Document template = XMLUtils.parseDocument(in);
+
+            if (template == null) {
+                throw new IOException("cannot load template");
+            }
+            return template;
+        }
+        finally {
+            if (in != null) {
+                try {
+                    in.close();
+                }
+                catch (IOException ioe) {
+                    log.error(ioe);
+                }
+            }
+        }
+    }
+
+    public static Recommendations createRecommendations(File file) {
+        log.debug("Recommendations.createBuilder");
+
+        if (!file.isFile() || !file.canRead()) {
+            log.error("Cannot open template file '" + file + "'");
+            return null;
+        }
+
+        FileBuilderProvider fbp = new FileBuilderProvider(file);
+
+        if (fbp.getBuilder() == null) {
+            log.error("failed loading builder");
+            return null;
+        }
+
+        BuilderProvider bp = DEVELOPMENT_MODE
+            ? fbp
+            : fbp.toStaticProvider();
+
+        return new Recommendations(bp);
+    }
+
+    protected static Recommendations createRecommendations() {
+        log.debug("Recommendations.createRecommendations");
+
+        String path = Config.getStringXPath(XPATH_TEMPLATE);
+
+        if (path == null) {
+            path = DEFAULT_TEMPLATE_PATH;
+        }
+
+        path = Config.replaceConfigDir(path);
+
+        log.info("Meta data template: " + path);
+
+        return createRecommendations(new File(path));
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/App.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,109 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.util.Map;
+import java.util.HashMap;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+
+import de.intevation.flys.backend.SessionFactoryProvider;
+
+import org.hibernate.Session;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.datacage.Recommendations;
+
+public class App
+{
+    private static Logger log = Logger.getLogger(App.class);
+
+    public static final String template =
+        System.getProperty("meta.data.template", "meta-data.xml");
+
+    public static final String userId =
+        System.getProperty("user.id");
+
+    public static final String PARAMETERS =
+        System.getProperty("meta.data.parameters", "");
+
+    public static final String OUTPUT =
+        System.getProperty("meta.data.output");
+
+    public static Map<String, Object> getParameters() {
+        HashMap<String, Object> map = new HashMap<String, Object>();
+        String [] parts = PARAMETERS.split("\\s*;\\s*");
+        for (String part: parts) {
+            String [] kv = part.split("\\s*:\\s*");
+            if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
+                continue;
+            }
+            String [] values = kv[1].split("\\s*,\\s*");
+            map.put(kv[0], values.length == 1 ? values[0] : values);
+        }
+        return map;
+    }
+
+    public static void main(String [] args) {
+
+        Recommendations rec = Recommendations.createRecommendations(
+            new File(template));
+
+        if (rec == null) {
+            System.err.println("No recommendations created");
+            return;
+        }
+
+        final Document result = XMLUtils.newDocument();
+
+        final Map<String, Object> parameters = getParameters();
+
+        Session session = SessionFactoryProvider
+            .createSessionFactory()
+            .openSession();
+
+        try {
+            rec.recommend(parameters, userId, result, session);
+        }
+        finally {
+            session.close();
+        }
+
+        OutputStream out;
+
+        if (OUTPUT == null) {
+            out = System.out;
+        }
+        else {
+            try {
+                out = new FileOutputStream(OUTPUT);
+            }
+            catch (IOException ioe) {
+                log.error(ioe);
+                return;
+            }
+        }
+
+        try {
+            XMLUtils.toStream(result, out);
+        }
+        finally {
+            if (OUTPUT != null) {
+                try {
+                    out.close();
+                }
+                catch (IOException ioe) {
+                    log.error(ioe);
+                }
+            }
+        }
+        System.exit(0);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/Builder.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,598 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Deque;
+import java.util.ArrayDeque;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+import org.w3c.dom.Node;
+import org.w3c.dom.Element;
+
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathFactory;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathConstants;
+
+import java.sql.SQLException;
+import java.sql.Connection;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import org.apache.log4j.Logger;
+
+public class Builder
+{
+    private static Logger log = Logger.getLogger(Builder.class);
+
+    public static final String CONNECTION_USER   = "user";
+    public static final String CONNECTION_SYSTEM = "system";
+    public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM;
+
+    public static final Pattern STRIP_LINE_INDENT =
+        Pattern.compile("\\s*\\r?\\n\\s*");
+
+    public static final String DC_NAMESPACE_URI =
+        "http://www.intevation.org/2011/Datacage";
+
+    private static final Document EVAL_DOCUMENT =
+        XMLUtils.newDocument();
+
+    private static final XPathFactory XPATH_FACTORY =
+        XPathFactory.newInstance();
+
+    protected Document template;
+
+    protected Map<String, CompiledStatement> compiledStatements;
+
+    public static class NamedConnection {
+
+        protected String     name;
+        protected Connection connection;
+        protected boolean    cached;
+
+        public NamedConnection() {
+        }
+
+        public NamedConnection(
+            String     name, 
+            Connection connection
+        ) {
+            this(name, connection, true);
+        }
+
+        public NamedConnection(
+            String     name, 
+            Connection connection,
+            boolean    cached
+        ) {
+            this.name       = name;
+            this.connection = connection;
+            this.cached     = cached;
+        }
+    } // class NamedConnection
+
+
+    public class BuildHelper
+    {
+        protected Node                                    output;
+        protected Document                                owner;
+        protected StackFrames                             frames;
+        protected List<NamedConnection>                   connections;
+        protected Map<String, CompiledStatement.Instance> statements;
+        protected Deque<NamedConnection>                  connectionsStack;
+        protected Deque<ResultData>                       resultsStack;
+
+        public BuildHelper(
+            Node                  output,
+            List<NamedConnection> connections,
+            Map<String, Object>   parameters
+        ) {
+            if (connections.isEmpty()) {
+                throw new IllegalArgumentException("no connections given.");
+            }
+
+            this.connections = connections;
+            connectionsStack = new ArrayDeque<NamedConnection>();
+            resultsStack     = new ArrayDeque<ResultData>();
+            this.output      = output;
+            frames           = new StackFrames(parameters);
+            owner            = getOwnerDocument(output);
+            statements =
+                new HashMap<String, CompiledStatement.Instance>();
+        }
+
+        public void build() throws SQLException {
+            try {
+                synchronized (template) {
+                    for (Node current: rootsToList()) {
+                        build(output, current);
+                    }
+                }
+            }
+            finally {
+                closeStatements();
+            }
+        }
+
+        protected void closeStatements() {
+            for (CompiledStatement.Instance csi: statements.values()) {
+                csi.close();
+            }
+            statements.clear();
+        }
+
+        protected void context(Node parent, Element current)
+        throws SQLException
+        {
+            log.debug("dc:context");
+
+            NodeList subs = current.getChildNodes();
+            int S = subs.getLength();
+
+            // check only direct children
+            Node stmntNode = null;
+            for (int i = 0; i < S; ++i) {
+                Node node = subs.item(i);
+                String ns;
+                if (node.getNodeType() == Node.ELEMENT_NODE
+                &&  node.getLocalName().equals("statement")
+                && (ns = node.getNamespaceURI()) != null
+                && ns.equals(DC_NAMESPACE_URI)) {
+                    stmntNode = node;
+                    break;
+                }
+            }
+
+            if (stmntNode == null) {
+                log.warn("dc:context: cannot find statement");
+                return;
+            }
+
+            String con = current.getAttribute("connection");
+
+            String stmntText = stmntNode.getTextContent();
+
+            String key = con + "-" + stmntText;
+
+            CompiledStatement.Instance csi = statements.get(key);
+
+            if (csi == null) {
+                CompiledStatement cs = compiledStatements.get(stmntText);
+                csi = cs.new Instance();
+                statements.put(key, csi);
+            }
+
+            NamedConnection connection = connectionsStack.isEmpty()
+                ? connections.get(0)
+                : connectionsStack.peek();
+
+            if (con.length() > 0) {
+                for (NamedConnection nc: connections) {
+                    if (con.equals(nc.name)) {
+                        connection = nc;
+                        break;
+                    }
+                }
+            }
+
+            ResultData rd = csi.execute(
+                connection.connection,
+                frames,
+                connection.cached);
+
+            // only descent if there are results
+            if (!rd.isEmpty()) {
+                resultsStack.push(rd);
+                connectionsStack.push(connection);
+                try {
+                    for (int i = 0; i < S; ++i) {
+                        build(parent, subs.item(i));
+                    }
+                }
+                finally {
+                    connectionsStack.pop();
+                    resultsStack.pop();
+                }
+            }
+        }
+
+        protected void elements(Node parent, Element current) 
+        throws SQLException
+        {
+            log.debug("dc:elements");
+
+            if (resultsStack.isEmpty()) {
+                log.warn("dc:elements without having results");
+                return;
+            }
+
+            NodeList subs = current.getChildNodes();
+            int S = subs.getLength();
+
+            if (S == 0) {
+                log.debug("dc:elements has no children");
+                return;
+            }
+
+            ResultData rd = resultsStack.peek();
+
+            String [] columns = rd.getColumnLabels();
+
+            //if (log.isDebugEnabled()) {
+            //    log.debug("pushing vars: "
+            //        + java.util.Arrays.toString(columns));
+            //}
+
+            for (Object [] row: rd.getRows()) {
+                frames.enter();
+                try {
+                    frames.put(columns, row);
+                    //if (log.isDebugEnabled()) {
+                    //    log.debug("current vars: " + frames.dump());
+                    //}
+                    for (int i = 0; i < S; ++i) {
+                        build(parent, subs.item(i));
+                    }
+                }
+                finally {
+                    frames.leave();
+                }
+            }
+        }
+
+        protected void element(Node parent, Element current)
+        throws SQLException
+        {
+            String attr = expand(current.getAttribute("name"));
+
+            if (log.isDebugEnabled()) {
+                log.debug("dc:element -> '" + attr + "'");
+            }
+
+            if (attr.length() == 0) {
+                log.warn("no name attribute found");
+                return;
+            }
+
+            Element element = owner.createElement(attr);
+
+            NodeList children = current.getChildNodes();
+            for (int i = 0, N = children.getLength(); i < N; ++i) {
+                build(element, children.item(i));
+            }
+
+            parent.appendChild(element);
+        }
+
+        protected void text(Node parent, Element current)
+        throws SQLException
+        {
+            log.debug("dc:text");
+            String value = expand(current.getTextContent());
+            parent.appendChild(owner.createTextNode(value));
+        }
+
+
+        protected void attribute(Node parent, Element current) {
+
+            if (parent.getNodeType() != Node.ELEMENT_NODE) {
+                log.warn("need element here");
+                return;
+            }
+
+            String name  = expand(current.getAttribute("name"));
+            String value = expand(current.getAttribute("value"));
+
+            Element element = (Element)parent;
+
+            element.setAttribute(name, value);
+        }
+
+        protected void callMacro(Node parent, Element current)
+        throws SQLException
+        {
+            String name = current.getAttribute("name");
+
+            if (name.length() == 0) {
+                log.warn("missing 'name' attribute in 'call-macro'");
+                return;
+            }
+
+            NodeList macros = template.getElementsByTagNameNS(
+                DC_NAMESPACE_URI, "macro");
+
+            for (int i = 0, N = macros.getLength(); i < N; ++i) {
+                Element macro = (Element)macros.item(i);
+                if (name.equals(macro.getAttribute("name"))) {
+                    NodeList subs = macro.getChildNodes();
+                    for (int j = 0, M = subs.getLength(); j < M; ++j) {
+                        build(parent, subs.item(j));
+                    }
+                    return;
+                }
+            }
+
+            log.warn("no macro '" + name + "' found.");
+        }
+
+        protected void ifClause(Node parent, Element current)
+        throws SQLException
+        {
+            String test = current.getAttribute("test");
+
+            if (test.length() == 0) {
+                log.warn("missing 'test' attribute in 'if'");
+                return;
+            }
+
+            Boolean result = evaluateXPath(test);
+
+            if (result != null && result.booleanValue()) {
+                NodeList subs = current.getChildNodes();
+                for (int i = 0, N = subs.getLength(); i < N; ++i) {
+                    build(parent, subs.item(i));
+                }
+            }
+        }
+
+        protected void choose(Node parent, Element current)
+        throws SQLException
+        {
+            Node branch = null;
+
+            NodeList children = current.getChildNodes();
+            for (int i = 0, N = children.getLength(); i < N; ++i) {
+                Node child = children.item(i);
+                String ns = child.getNamespaceURI();
+                if (ns == null
+                || !ns.equals(DC_NAMESPACE_URI)
+                || child.getNodeType() != Node.ELEMENT_NODE
+                ) {
+                    continue;
+                }
+                String name = child.getLocalName();
+                if ("when".equals(name)) {
+                    Element when = (Element)child;
+                    String test = when.getAttribute("test");
+                    if (test.length() == 0) {
+                        log.warn("no 'test' attribute found for when");
+                        continue;
+                    }
+
+                    Boolean result = evaluateXPath(test);
+                    if (result != null && result.booleanValue()) {
+                        branch = child;
+                        break;
+                    }
+
+                    continue;
+                }
+                else if ("otherwise".equals(name)) {
+                    branch = child;
+                    // No break here.
+                }
+            }
+
+            if (branch != null) {
+                NodeList subs = branch.getChildNodes();
+                for (int i = 0, N = subs.getLength(); i < N; ++i) {
+                    build(parent, subs.item(i));
+                }
+            }
+        }
+
+        protected Boolean evaluateXPath(String expr) {
+
+            if (log.isDebugEnabled()) {
+                log.debug("evaluate: '" + expr + "'");
+            }
+
+            try {
+                XPath xpath = XPATH_FACTORY.newXPath();
+                xpath.setXPathVariableResolver(frames);
+                xpath.setXPathFunctionResolver(FunctionResolver.FUNCTIONS);
+                Object result = xpath.evaluate(
+                    expr, EVAL_DOCUMENT, XPathConstants.BOOLEAN);
+
+                return result instanceof Boolean
+                    ? (Boolean)result
+                    : null;
+            }
+            catch (XPathExpressionException xfce) {
+                log.error(xfce);
+            }
+            return null;
+        }
+
+        protected void convert(Node parent, Element current) {
+
+            String variable = expand(current.getAttribute("var"));
+            String type     = expand(current.getAttribute("type"));
+
+            if (frames.containsKey(variable)) {
+                Object object = TypeConverter.convert(
+                    frames.get(variable),
+                    type);
+                frames.put(variable, object);
+            }
+        }
+
+        protected String expand(String s) {
+            Matcher m = CompiledStatement.VAR.matcher(s);
+
+            StringBuffer sb = new StringBuffer();
+            while (m.find()) {
+                String key = m.group(1);
+                Object value = frames.get(key);
+                m.appendReplacement(sb, value != null ? value.toString() : "");
+            }
+            m.appendTail(sb);
+            return sb.toString();
+        }
+
+        protected void build(Node parent, Node current)
+        throws SQLException
+        {
+            String ns = current.getNamespaceURI();
+            if (ns != null && ns.equals(DC_NAMESPACE_URI)) {
+                if (current.getNodeType() != Node.ELEMENT_NODE) {
+                    log.warn("need elements here");
+                }
+                else {
+                    String localName = current.getLocalName();
+                    if ("attribute".equals(localName)) {
+                        attribute(parent, (Element)current);
+                    }
+                    else if ("context".equals(localName)) {
+                        context(parent, (Element)current);
+                    }
+                    else if ("if".equals(localName)) {
+                        ifClause(parent, (Element)current);
+                    }
+                    else if ("choose".equals(localName)) {
+                        choose(parent, (Element)current);
+                    }
+                    else if ("call-macro".equals(localName)) {
+                        callMacro(parent, (Element)current);
+                    }
+                    else if ("macro".equals(localName)) {
+                        // Simply ignore the definition.
+                    }
+                    else if ("element".equals(localName)) {
+                        element(parent, (Element)current);
+                    }
+                    else if ("elements".equals(localName)) {
+                        elements(parent, (Element)current);
+                    }
+                    else if ("text".equals(localName)) {
+                        text(parent, (Element)current);
+                    }
+                    else if ("comment".equals(localName)
+                         ||  "statement".equals(localName)) {
+                        // ignore comments and statements in output
+                    }
+                    else if ("convert".equals(localName)) {
+                        convert(parent, (Element)current);
+                    }
+                    else {
+                        log.warn("unknown '" + localName + "' -> ignore");
+                    }
+                }
+                return;
+            }
+
+            if (current.getNodeType() == Node.TEXT_NODE) {
+                String txt = current.getNodeValue();
+                if (txt != null && txt.trim().length() == 0) {
+                    return;
+                }
+            }
+
+            Node copy = owner.importNode(current, false);
+
+            NodeList children = current.getChildNodes();
+            for (int i = 0, N = children.getLength(); i < N; ++i) {
+                build(copy, children.item(i));
+            }
+            parent.appendChild(copy);
+        }
+    } // class BuildHelper
+
+
+    public Builder() {
+        compiledStatements = new HashMap<String, CompiledStatement>();
+    }
+
+    public Builder(Document template) {
+        this();
+        this.template = template;
+        compileStatements();
+    }
+
+    protected void compileStatements() {
+
+        NodeList nodes = template.getElementsByTagNameNS(
+            DC_NAMESPACE_URI, "statement");
+
+        for (int i = 0, N = nodes.getLength(); i < N; ++i) {
+            Element stmntElement = (Element)nodes.item(i);
+            String stmnt = trimStatement(stmntElement.getTextContent());
+            if (stmnt == null || stmnt.length() == 0) {
+                throw new IllegalArgumentException("found empty statement");
+            }
+            CompiledStatement cs = new CompiledStatement(stmnt);
+            // For faster lookup store a shortend string into the template.
+            stmnt = "s" + i;
+            stmntElement.setTextContent(stmnt);
+            compiledStatements.put(stmnt, cs);
+        }
+    }
+
+    protected List<Node> rootsToList() {
+
+        NodeList roots = template.getElementsByTagNameNS(
+            DC_NAMESPACE_URI, "template");
+
+        List<Node> elements = new ArrayList<Node>();
+
+        for (int i = 0, N = roots.getLength(); i < N; ++i) {
+            NodeList rootChildren = roots.item(i).getChildNodes();
+            for (int j = 0, M = rootChildren.getLength(); j < M; ++j) {
+                Node child = rootChildren.item(j);
+                if (child.getNodeType() == Node.ELEMENT_NODE) {
+                    elements.add(child);
+                }
+            }
+        }
+
+        return elements;
+    }
+
+    protected static final String trimStatement(String stmnt) {
+        if (stmnt == null) return null;
+        //XXX: Maybe a bit to radical for multiline strings?
+        return STRIP_LINE_INDENT.matcher(stmnt.trim()).replaceAll(" ");
+    }
+
+    protected static Document getOwnerDocument(Node node) {
+        Document document = node.getOwnerDocument();
+        return document != null ? document : (Document)node;
+    }
+
+    private static final List<NamedConnection> wrap(Connection connection) {
+        List<NamedConnection> list = new ArrayList<NamedConnection>(1);
+        list.add(new NamedConnection(DEFAULT_CONNECTION_NAME, connection));
+        return list;
+    }
+
+    public void build(
+        Connection          connection,
+        Node                output,
+        Map<String, Object> parameters
+    )
+    throws SQLException
+    {
+        build(wrap(connection), output, parameters);
+    }
+
+    public void build(
+        List<NamedConnection> connections,
+        Node                  output,
+        Map<String, Object>   parameters
+    )
+    throws SQLException
+    {
+        BuildHelper helper = new BuildHelper(output, connections, parameters);
+
+        helper.build();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/CompiledStatement.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,213 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.ArrayList;
+
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.sql.Connection;
+import java.sql.ResultSet;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.Element;
+
+import de.intevation.flys.artifacts.cache.CacheFactory;
+
+import org.apache.log4j.Logger;
+
+public class CompiledStatement
+{
+    private static Logger log = Logger.getLogger(CompiledStatement.class);
+
+    public static final String DATACAGE_DB_CACHE =
+        "datacage.db";
+
+    public static final Pattern VAR =
+        Pattern.compile("\\$\\{([a-zA-Z0-9_-]+)\\}");
+
+    protected String original;
+    protected String statement;
+
+    protected Map<String, List<Integer>> positions;
+
+    protected int numVars;
+
+    public class Instance {
+
+        protected PreparedStatement preparedStatement;
+
+        public Instance() {
+        }
+
+        protected ResultData executeCached(
+            Cache       cache,
+            Connection  connection,
+            StackFrames frames
+        )
+        throws SQLException
+        {
+            log.debug("executeCached");
+            Object [] values = new Object[numVars];
+
+            StringBuilder sb = new StringBuilder(original);
+
+            for (Map.Entry<String, List<Integer>> entry: positions.entrySet()) {
+                String key   = entry.getKey();
+                Object value = frames.get(key);
+                sb.append(';').append(key).append(':').append(value);
+                for (Integer index: entry.getValue()) {
+                    values[index] = value;
+                }
+            }
+
+            // XXX: Maybe too many collisions?
+            // String key = original + Arrays.hashCode(values);
+            String key = sb.toString();
+
+            Element element = cache.get(key);
+
+            if (element != null) {
+                return (ResultData)element.getValue();
+            }
+
+            if (preparedStatement == null) {
+                preparedStatement = connection.prepareStatement(statement);
+            }
+
+            for (int i = 0; i < values.length; ++i) {
+                preparedStatement.setObject(i+1, values[i]);
+            }
+
+            ResultData data;
+
+            if (log.isDebugEnabled()) {
+                log.debug("executing: " + statement);
+            }
+
+            ResultSet result = preparedStatement.executeQuery();
+            try {
+                data = new ResultData(preparedStatement.getMetaData())
+                    .addAll(result);
+            }
+            finally {
+                result.close();
+            }
+
+            element = new Element(key, data);
+            cache.put(element);
+
+            return data;
+        }
+
+        protected ResultData executeUncached(
+            Connection  connection,
+            StackFrames frames
+        ) 
+        throws SQLException
+        {
+            log.debug("executeUncached");
+            if (preparedStatement == null) {
+                if (log.isDebugEnabled()) {
+                    log.debug("preparing statement: " + statement);
+                }
+                preparedStatement = connection.prepareStatement(statement);
+            }
+
+            for (Map.Entry<String, List<Integer>> entry: positions.entrySet()) {
+                Object value = frames.get(entry.getKey());
+                for (Integer index: entry.getValue()) {
+                    preparedStatement.setObject(index+1, value);
+                }
+            }
+
+            if (log.isDebugEnabled()) {
+                log.debug("executing: " + statement);
+            }
+
+            ResultSet result = preparedStatement.executeQuery();
+            try {
+                return new ResultData(preparedStatement.getMetaData())
+                    .addAll(result);
+            }
+            finally {
+                result.close();
+            }
+        }
+
+        public ResultData execute(
+            Connection  connection,
+            StackFrames frames,
+            boolean     cached
+        )
+        throws SQLException
+        {
+            if (!cached) {
+                return executeUncached(connection, frames);
+            }
+
+            Cache cache = CacheFactory.getCache(DATACAGE_DB_CACHE);
+
+            return cache != null
+                ? executeCached(cache, connection, frames)
+                : executeUncached(connection, frames);
+        }
+
+        public void close() {
+            if (preparedStatement != null) {
+                try {
+                    preparedStatement.close();
+                }
+                catch (SQLException sqle) {
+                }
+                preparedStatement = null;
+            }
+        }
+    } // class Instance
+
+    public CompiledStatement() {
+    }
+
+    public CompiledStatement(String original) {
+        this.original = original;
+        // TreeMap to ensure order
+        positions = new TreeMap<String, List<Integer>>();
+        compile();
+    }
+
+    protected void compile() {
+
+        StringBuffer sb = new StringBuffer();
+
+        Matcher m = VAR.matcher(original);
+
+        int index = 0;
+
+        while (m.find()) {
+            String key = m.group(1);
+            List<Integer> indices = positions.get(key);
+            if (indices == null) {
+                indices = new ArrayList<Integer>();
+                positions.put(key, indices);
+            }
+            indices.add(index);
+            m.appendReplacement(sb, "?");
+            ++index;
+        }
+
+        m.appendTail(sb);
+
+        numVars = index;
+
+        statement = sb.toString();
+    }
+
+    public String getStatement() {
+        return statement;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/FunctionResolver.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,103 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.util.List;
+import java.util.Collection;
+import java.util.Map;
+import java.util.ArrayList;
+
+import javax.xml.xpath.XPathFunctionResolver;
+import javax.xml.xpath.XPathFunction;
+import javax.xml.xpath.XPathFunctionException;
+
+import javax.xml.namespace.QName;
+
+import org.apache.log4j.Logger;
+
+public class FunctionResolver
+implements   XPathFunctionResolver
+{
+    private static Logger log = Logger.getLogger(FunctionResolver.class);
+
+    public static final String FUNCTION_NAMESPACE_URI = "dc";
+
+    public static final class Entry {
+
+        String        name;
+        XPathFunction function;
+        int           arity;
+
+        public Entry() {
+        }
+
+        public Entry(String name, XPathFunction function, int arity) {
+            this.name     = name;
+            this.function = function;
+            this.arity    = arity;
+        }
+    } // class Entry
+
+    public static final FunctionResolver FUNCTIONS = new FunctionResolver();
+
+    static {
+        FUNCTIONS.addFunction("contains", 2, new XPathFunction() {
+            @Override
+            public Object evaluate(List args) throws XPathFunctionException {
+                Object haystack = args.get(0);
+                Object needle   = args.get(1);
+                try {
+                    if (haystack instanceof Collection) {
+                        return Boolean.valueOf(
+                            ((Collection)haystack).contains(needle));
+                    }
+
+                    if (haystack instanceof Map) {
+                        return Boolean.valueOf(
+                            ((Map)haystack).containsKey(needle));
+                    }
+
+                    if (haystack instanceof Object []) {
+                        for (Object straw: (Object [])haystack) {
+                            if (straw.equals(needle)) {
+                                return Boolean.TRUE;
+                            }
+                        }
+                    }
+
+                    return Boolean.FALSE;
+                }
+                catch (Exception e) {
+                    log.error(e);
+                    throw new XPathFunctionException(e);
+                }
+            }
+        });
+    }
+
+    protected List<Entry> functions;
+
+    public FunctionResolver() {
+        functions = new ArrayList<Entry>();
+    }
+
+    public void addFunction(String name, int arity, XPathFunction function) {
+        functions.add(new Entry(name, function, arity));
+    }
+
+    @Override
+    public XPathFunction resolveFunction(QName functionName, int arity) {
+
+        if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) {
+            return null;
+        }
+
+        String name = functionName.getLocalPart();
+        for (Entry entry: functions) {
+            if (entry.arity == arity && entry.name.equals(name)) {
+                return entry.function;
+            }
+        }
+
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/ResultData.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,64 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.io.Serializable;
+
+import java.sql.ResultSetMetaData;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import java.util.List;
+import java.util.ArrayList;
+
+public class ResultData
+implements   Serializable
+{
+    protected String [] columns;
+
+    protected List<Object []> rows;
+
+    public ResultData() {
+        rows = new ArrayList<Object []>();
+    }
+
+    public ResultData(ResultSetMetaData meta)
+    throws SQLException
+    {
+        this();
+
+        int N = meta.getColumnCount();
+
+        columns = new String[N];
+
+        for (int i = 1; i <= N; ++i) {
+            columns[i-1] = meta.getColumnLabel(i);
+        }
+    }
+
+    public String [] getColumnLabels() {
+        return columns;
+    }
+
+    public ResultData addAll(ResultSet result) throws SQLException {
+        while (result.next()) {
+            add(result);
+        }
+        return this;
+    }
+
+    public void add(ResultSet result) throws SQLException {
+        Object [] row = new Object[columns.length];
+        for (int i = 0; i < columns.length; ++i) {
+            row[i] = result.getObject(i+1);
+        }
+        rows.add(row);
+    }
+
+    public List<Object []> getRows() {
+        return rows;
+    }
+
+    public boolean isEmpty() {
+        return rows.isEmpty();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,109 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.List;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.xml.xpath.XPathVariableResolver;
+
+import javax.xml.namespace.QName;
+
+import org.apache.log4j.Logger;
+
+public class StackFrames
+implements   XPathVariableResolver
+{
+    private static Logger log = Logger.getLogger(StackFrames.class);
+
+    protected List<Map<String, Object>> frames;
+
+    public StackFrames() {
+        frames = new ArrayList<Map<String, Object>>();
+    }
+
+    public StackFrames(Map<String, Object> initialFrame) {
+        this();
+        if (initialFrame != null) {
+            frames.add(new HashMap<String, Object>(initialFrame));
+        }
+    }
+
+    public void enter() {
+        frames.add(new HashMap<String, Object>());
+    }
+
+    public void leave() {
+        frames.remove(frames.size()-1);
+    }
+
+    public void put(String key, Object value) {
+        int N = frames.size();
+        if (N > 0) {
+            frames.get(N-1).put(key, value);
+        }
+    }
+
+    public void put(String [] keys, Object [] values) {
+        Map<String, Object> top = frames.get(frames.size()-1);
+        for (int i = 0; i < keys.length; ++i) {
+            top.put(keys[i], values[i]);
+        }
+    }
+
+    public boolean containsKey(String key) {
+        for (int i = frames.size()-1; i >= 0; --i) {
+            if (frames.get(i).containsKey(key)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public Object get(String key) {
+        return get(key, null);
+    }
+
+    public Object get(String key, Object def) {
+
+        for (int i = frames.size()-1; i >= 0; --i) {
+            Map<String, Object> frame = frames.get(i);
+            if (frame.containsKey(key)) {
+                return frame.get(key);
+            }
+        }
+
+        return def;
+    }
+
+    @Override
+    public Object resolveVariable(QName variableName) {
+        if (log.isDebugEnabled()) {
+            log.debug("resolve var: " + variableName);
+        }
+        return get(variableName.getLocalPart());
+    }
+
+    public String dump() {
+        StringBuilder sb = new StringBuilder("[");
+        Set<String> already = new HashSet<String>();
+
+        boolean first = true;
+
+        for (int i = frames.size()-1; i >= 0; --i) {
+            Map<String, Object> frame = frames.get(i);
+            for (Map.Entry<String, Object> entry: frame.entrySet()) {
+                if (already.add(entry.getKey())) {
+                    if (first) { first = false;   }
+                    else       { sb.append(", "); }
+                    sb.append('\'').append(entry.getKey())
+                      .append("'='").append(entry.getValue()).append('\'');
+                }
+            }
+        }
+        return sb.append(']').toString();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/TypeConverter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,31 @@
+package de.intevation.flys.artifacts.datacage.templating;
+
+public class TypeConverter
+{
+    private TypeConverter() {
+    }
+
+    public static Object convert(Object object, String type) {
+
+        if (type == null) {
+            return object;
+        }
+
+        if ("Integer".equals(type)) {
+            return Integer.valueOf(object.toString());
+        }
+
+        if ("Double".equals(type)) {
+            return Double.valueOf(object.toString());
+        }
+
+        if ("String".equals(type)) {
+            return object.toString();
+        }
+
+        // TODO: Add more types
+
+        return object;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,251 @@
+package de.intevation.flys.geom;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import java.awt.geom.Point2D;
+import java.awt.geom.Line2D;
+
+import de.intevation.flys.artifacts.math.Linear;
+
+import org.apache.log4j.Logger;
+
+public class Lines
+{
+    private static Logger log = Logger.getLogger(Lines.class);
+
+    public static final double EPSILON = 1e-4;
+
+    public static enum Mode { UNDEF, WET, DRY };
+
+    protected Lines() {
+    }
+
+    public static List<Line2D> fillWater(List<Point2D> points, double waterLevel) {
+
+        boolean debug = log.isDebugEnabled();
+
+        if (debug) {
+            log.debug("fillWater");
+            log.debug("----------------------------");
+        }
+
+        List<Line2D> result = new ArrayList();
+
+        int N = points.size();
+
+        if (N == 0) {
+            return result;
+        }
+
+        if (N == 1) {
+            Point2D p = points.get(0);
+            // Only generate point if over water
+            if (waterLevel > p.getY()) {
+                result.add(new Line2D.Double(
+                    p.getX(), waterLevel,
+                    p.getX(), waterLevel));
+            }
+            return result;
+        }
+
+        double minX =  Double.MAX_VALUE;
+        double minY =  Double.MAX_VALUE;
+        double maxX = -Double.MAX_VALUE;
+        double maxY = -Double.MAX_VALUE;
+
+        // To ensure for sequences of equals x's that
+        // the original index order is preserved.
+        for (Point2D p: points) {
+            double x = p.getX(), y = p.getY();
+            if (x < minX) minX = x;
+            if (x > maxX) maxX = x;
+            if (y < minY) minY = y;
+            if (y > maxY) maxY = y;
+        }
+
+        if (minY > waterLevel) { // profile completely over water level
+            log.debug("complete over water");
+            return result;
+        }
+
+        if (waterLevel > maxY) { // water floods profile
+            log.debug("complete under water");
+            result.add(new Line2D.Double(minX, waterLevel, maxX, waterLevel));
+            return result;
+        }
+
+        Mode mode = Mode.UNDEF;
+
+        double startX = minX;
+
+        for (int i = 1; i < N; ++i) {
+            Point2D p1 = points.get(i-1);
+            Point2D p2 = points.get(i);
+
+            if (p1.getY() < waterLevel && p2.getY() < waterLevel) {
+                // completely under water
+                if (debug) {
+                    log.debug("under water: " + p1 + " " + p2);
+                }
+                if (mode != Mode.WET) {
+                    startX = p1.getX();
+                    mode = Mode.WET;
+                }
+                continue;
+            }
+
+            if (p1.getY() > waterLevel && p2.getY() > waterLevel) {
+                if (debug) {
+                    log.debug("over water: " + p1 + " " + p2);
+                }
+                // completely over water
+                if (mode == Mode.WET) {
+                    log.debug("over/wet");
+                    result.add(new Line2D.Double(
+                        startX, waterLevel,
+                        p1.getX(), waterLevel));
+                }
+                mode = Mode.DRY;
+                continue;
+            }
+
+            if (Math.abs(p1.getX() - p2.getX()) < EPSILON) {
+                // vertical line
+                switch (mode) {
+                    case WET:
+                        log.debug("vertical/wet");
+                        mode = Mode.DRY;
+                        result.add(new Line2D.Double(
+                            startX, waterLevel,
+                            p1.getX(), waterLevel));
+                        break;
+                    case DRY:
+                        log.debug("vertical/dry");
+                        mode = Mode.WET;
+                        startX = p2.getX();
+                        break;
+                    default: // UNDEF
+                        log.debug("vertical/undef");
+                        if (p2.getY() < waterLevel) {
+                            mode = Mode.WET;
+                            startX = p2.getX();
+                        }
+                        else {
+                            mode = Mode.DRY;
+                        }
+                }
+                continue;
+            }
+
+            // check if waterlevel directly hits the vertices;
+
+            boolean p1W = Math.abs(waterLevel - p1.getY()) < EPSILON;
+            boolean p2W = Math.abs(waterLevel - p2.getY()) < EPSILON;
+
+            if (p1W || p2W) {
+                if (debug) {
+                    log.debug("water hits vertex: " + p1 + " " + p2 + " " + mode);
+                }
+                if (p1W && p2W) { // parallel to water -> dry
+                    log.debug("water hits both vertices");
+                    if (mode == Mode.WET) {
+                        result.add(new Line2D.Double(
+                            startX, waterLevel,
+                            p1.getX(), waterLevel));
+                    }
+                    mode = Mode.DRY;
+                }
+                else if (p1W) { // p1 == waterlevel
+                    log.debug("water hits first vertex");
+                    if (p2.getY() > waterLevel) { // --> dry
+                        if (mode == Mode.WET) {
+                            result.add(new Line2D.Double(
+                                startX, waterLevel,
+                                p1.getX(), waterLevel));
+                        }
+                        mode = Mode.DRY;
+                    }
+                    else { // --> wet
+                        if (mode != Mode.WET) {
+                            startX = p1.getX();
+                            mode = Mode.WET;
+                        }
+                    }
+                }
+                else { // p2 == waterlevel
+                    log.debug("water hits second vertex");
+                    if (p1.getY() > waterLevel) { // --> wet
+                        if (mode != Mode.WET) {
+                            startX = p2.getX();
+                            mode = Mode.WET;
+                        }
+                    }
+                    else { // --> dry
+                        if (mode == Mode.WET) {
+                            result.add(new Line2D.Double(
+                                startX, waterLevel,
+                                p2.getX(), waterLevel));
+                        }
+                        mode = Mode.DRY;
+                    }
+                }
+                if (debug) {
+                    log.debug("mode is now: " + mode);
+                }
+                continue;
+            }
+
+            // intersection case
+            double x = Linear.linear(
+                waterLevel,
+                p1.getY(), p2.getY(),
+                p1.getX(), p2.getX());
+
+            if (debug) {
+                log.debug("intersection p1:" + p1);
+                log.debug("intersection p2:" + p2);
+                log.debug("intersection at x: " + x);
+            }
+
+            switch (mode) {
+                case WET:
+                    log.debug("intersect/wet");
+                    mode = Mode.DRY;
+                    result.add(new Line2D.Double(
+                        startX, waterLevel,
+                        x, waterLevel));
+                    break;
+
+                case DRY:
+                    log.debug("intersect/dry");
+                    mode   = Mode.WET;
+                    startX = x;
+                    break;
+
+                default: // UNDEF
+                    log.debug("intersect/undef");
+                    if (p2.getY() > waterLevel) {
+                        log.debug("intersect/undef/over");
+                        mode = Mode.DRY;
+                        result.add(new Line2D.Double(
+                            p1.getX(), waterLevel,
+                            x, waterLevel));
+                    }
+                    else {
+                        mode = Mode.WET;
+                        startX = x;
+                    }
+            } // switch mode
+        } // for all points p[i] and p[i-1]
+
+        if (mode == Mode.WET) {
+            result.add(new Line2D.Double(
+                startX, waterLevel,
+                maxX, waterLevel));
+        }
+
+        return result;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,300 @@
+package de.intevation.flys.artifacts.math;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import java.io.Serializable;
+
+import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
+
+import org.apache.commons.math.analysis.polynomials.PolynomialSplineFunction;
+
+import org.apache.commons.math.ArgumentOutsideDomainException;
+
+import org.apache.commons.math.exception.MathIllegalArgumentException;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.Calculation;
+
+public class BackJumpCorrector
+implements   Serializable
+{
+    private static Logger log = Logger.getLogger(BackJumpCorrector.class);
+
+    protected ArrayList<Double> backjumps;
+
+    protected double [] corrected;
+
+    public BackJumpCorrector() {
+        backjumps = new ArrayList<Double>();
+    }
+
+    public boolean hasBackJumps() {
+        return !backjumps.isEmpty();
+    }
+
+    public List<Double> getBackJumps() {
+        return backjumps;
+    }
+
+    public double [] getCorrected() {
+        return corrected;
+    }
+
+    public boolean doCorrection(
+        double []   km,
+        double []   ws,
+        Calculation errors
+    ) {
+        boolean wsUp = isIncreasing(ws);
+
+        if (wsUp) {
+            km = swapClone(km);
+            ws = swapClone(ws);
+        }
+
+        boolean kmUp = isIncreasing(km);
+
+        if (!kmUp) {
+            km = sumDiffs(km);
+        }
+
+        if (log.isDebugEnabled()) {
+            log.debug("BackJumpCorrector.doCorrection ------- enter");
+            log.debug("  km increasing: " + isIncreasing(km));
+            log.debug("  ws increasing: " + isIncreasing(ws));
+            log.debug("BackJumpCorrector.doCorrection ------- leave");
+        }
+
+        boolean hasBackJumps = doCorrectionClean(km, ws, errors);
+
+        if (hasBackJumps && wsUp) {
+            // mirror back
+            swap(corrected);
+        }
+
+        return hasBackJumps;
+    }
+
+    protected boolean doCorrectionClean(
+        double []   km,
+        double []   ws,
+        Calculation errors
+    ) {
+        int N = km.length;
+
+        if (N != ws.length) {
+            throw new IllegalArgumentException("km.length != ws.length");
+        }
+
+        if (N < 2) {
+            return false;
+        }
+
+        SplineInterpolator interpolator = null;
+
+        for (int i = 1; i < N; ++i) {
+            if (ws[i] <= ws[i-1]) {
+                // no back jump
+                continue;
+            }
+            backjumps.add(km[i]);
+
+            if (corrected == null) {
+                // lazy cloning
+                ws = corrected = (double [])ws.clone();
+            }
+
+            int    back = i-2;
+            double distance = Math.abs(km[i] - km[i-1]);
+            double rest = 0.0;
+            double ikm  = 0.0;
+
+            while (back > -1) {
+                if (ws[back] < ws[i]) { // under water
+                    // continue scanning backwards
+                    distance += Math.abs(km[back+1] - km[back]);
+                    --back;
+                    continue;
+                }
+                if (ws[back] > ws[i]) { // over water
+                    // need to calculate intersection
+                    log.debug("intersection case");
+                    double m = (km[back+1]-km[back])/(ws[back+1]-ws[back]);
+                    double b = km[back]-ws[back]*m;
+                    ikm = m*ws[i] + b;
+                    distance += Math.abs(ikm - km[back+1]);
+                    rest = Math.abs(km[back] - ikm);
+                }
+                else {
+                    // equals height at ws[back]
+                    log.debug("exact height match");
+                    distance += Math.abs(km[back+1] - km[back]);
+                    ikm = km[back];
+                }
+                break;
+            }
+
+            if (back <= 0) {
+                //log.debug("run over left border");
+                // fill with same as ws[i]
+                for (int j = 0; j < i; ++j) {
+                    ws[j] = ws[i];
+                }
+                continue;
+            }
+
+            double quarterDistance = 0.25*distance;
+
+            // Now further seek back for the max height
+
+            double restDistance = Math.max(0.0, quarterDistance - rest);
+            --back;
+
+            double mkmw = ws[i];
+            double mkm  = km[0];
+
+            while (back > -1) {
+                double d = Math.abs(km[back+1] - km[back]);
+                restDistance -= d;
+                if (restDistance > 0.0) {
+                    --back;
+                    continue;
+                }
+                if (restDistance < 0.0) {
+                    // need to calculate intersection
+                    if (km[back] == km[back+1]) { // should not happen
+                        mkm = km[back];
+                        mkmw = 0.5*(ws[back] + ws[back+1]);
+                    }
+                    else {
+                        double m = (ws[back+1]-ws[back])/(km[back+1]-km[back]);
+                        double b = ws[back] - km[back]*m;
+                        mkm = km[back] + restDistance;
+                        mkmw = m*mkm + b;
+                    }
+                }
+                else {
+                    // exact match
+                    mkm  = km[back];
+                    mkmw = ws[back];
+                }
+                break;
+            }
+
+            double factor = back >= 0 && Math.abs(restDistance) < 1e-4
+                ? 1.0
+                : 1.0 - Math.min(1, Math.max(0, restDistance/quarterDistance));
+
+            double ikmw = factor*0.25*(mkmw-ws[i]) + ws[i];
+
+            double end = ikm + quarterDistance*factor;
+
+            double [] x = { mkm,  ikm,  end   };
+            double [] y = { mkmw, ikmw, ws[i] };
+
+            if (interpolator == null) {
+                interpolator = new SplineInterpolator();
+            }
+
+            if (log.isDebugEnabled()) {
+                for (int j = 0; j < x.length; ++j) {
+                    log.debug("   " + x[j] + " -> " + y[j]);
+                }
+            }
+
+            PolynomialSplineFunction spline;
+
+            try {
+                spline = interpolator.interpolate(x, y);
+            }
+            catch (MathIllegalArgumentException miae) {
+                // TODO: I18N
+                errors.addProblem("creating spline interpolation failed.");
+                log.error(miae);
+                continue;
+            }
+
+            try {
+                if (log.isDebugEnabled()) {
+                    log.debug("spline points:");
+                    for (int j = 0; j < x.length; ++j) {
+                        log.debug(x[j] + " " + y[j] + " " + spline.value(x[j]));
+                    }
+                }
+
+                for (back = Math.max(back, 0);
+                     back < i && km[back] < end;
+                     ++back
+                ) {
+                    // to 3/4 point fill with spline values
+                    ws[back] = spline.value(km[back]);
+                }
+                while (back < i) {
+                    // fill the rest with ws[i]
+                    ws[back++] = ws[i];
+                }
+            }
+            catch (ArgumentOutsideDomainException aode) {
+                // TODO: I18N
+                errors.addProblem("spline interpolation failed.");
+                log.error("spline interpolation failed", aode);
+            }
+        } // for all km
+
+        return !backjumps.isEmpty();
+    }
+
+    public static final boolean isIncreasing(double [] array) {
+        int inc = 0;
+        int dec = 0;
+        int sweet = (array.length-1)/2;
+        for (int i = 1; i < array.length; ++i) {
+            if (array[i] > array[i-1]) {
+                if (++inc > sweet) {
+                    return true;
+                }
+            }
+            else if (++dec > sweet) {
+                return false;
+            }
+        }
+        return inc > sweet;
+    }
+
+    public static final double [] swap(double [] array) {
+        int lo = 0;
+        int hi = array.length-1;
+        while (hi > lo) {
+            double t  = array[lo];
+            array[lo] = array[hi];
+            array[hi] = t;
+            ++lo;
+            --hi;
+        }
+
+        return array;
+    }
+
+    public static final double [] swapClone(double [] in) {
+        double [] out = new double[in.length];
+
+        for (int j = out.length-1, i = 0; j >= 0;) {
+            out[j--] = in[i++];
+        }
+
+        return out;
+    }
+
+    public static final double [] sumDiffs(double [] in) {
+        double [] out = new double[in.length];
+
+        for (int i = 1; i < out.length; ++i) {
+            out[i] = out[i-1] + Math.abs(in[i-1] - in[i]);
+        }
+
+        return out;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/Function.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,6 @@
+package de.intevation.flys.artifacts.math;
+
+public interface Function {
+    double value(double x);
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/Identity.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,15 @@
+package de.intevation.flys.artifacts.math;
+
+public final class Identity
+implements         Function
+{
+    public static final Identity IDENTITY = new Identity();
+
+    public Identity() {
+    }
+
+    public double value(double x) {
+        return x;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/Linear.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,68 @@
+package de.intevation.flys.artifacts.math;
+
+public final class Linear
+implements         Function
+{
+    private double m;
+    private double b;
+
+    public Linear(
+        double x1, double x2,
+        double y1, double y2
+    ) {
+        // y1 = m*x1 + b
+        // y2 = m*x2 + b
+        // y2 - y1 = m*(x2 - x1)
+        // m = (y2 - y1)/(x2 - x1) # x2 != x1
+        // b = y1 - m*x1
+
+        if (x1 == x2) {
+            m = 0;
+            b = 0.5*(y1 + y2);
+        }
+        else {
+            m = (y2 - y1)/(x2 - x1);
+            b = y1 - m*x1;
+        }
+    }
+
+    public static final double linear(
+        double x,
+        double x1, double x2,
+        double y1, double y2
+    ) {
+        // y1 = m*x1 + b
+        // y2 = m*x2 + b
+        // y2 - y1 = m*(x2 - x1)
+        // m = (y2 - y1)/(x2 - x1) # x2 != x1
+        // b = y1 - m*x1
+
+        if (x1 == x2) {
+            return 0.5*(y1 + y2);
+        }
+        double m = (y2 - y1)/(x2 - x1);
+        double b = y1 - m*x1;
+        return x*m + b;
+    }
+
+    @Override
+    public double value(double x) {
+        return m*x + b;
+    }
+
+    public static final double factor(double x, double p1, double p2) {
+        // 0 = m*p1 + b <=> b = -m*p1
+        // 1 = m*p2 + b
+        // 1 = m*(p2 - p1)
+        // m = 1/(p2 - p1) # p1 != p2
+        // f(x) = x/(p2-p1) - p1/(p2-p1) <=> (x-p1)/(p2-p1)
+
+        return p1 == p2 ? 0.0 : (x-p1)/(p2-p1);
+    }
+
+    public static final double weight(double factor, double a, double b) {
+        //return (1.0-factor)*a + factor*b;
+        return a + factor*(b-a);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/WKmsOperation.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,148 @@
+package de.intevation.flys.artifacts.math;
+
+import de.intevation.flys.artifacts.model.WKms;
+import de.intevation.flys.artifacts.model.WKmsImpl;
+
+import java.util.Arrays;
+
+public abstract class WKmsOperation
+{
+    public static final double EPSILON = 1e-6;
+
+    public static final class KmW 
+    implements                Comparable<KmW>
+    {
+        protected double km;
+        protected double w;
+
+        public KmW(double km, double w) {
+            this.km = km;
+            this.w  = w;
+        }
+
+        public int compareTo(KmW other) {
+            return km < other.km
+                ? -1
+                : km > other.km ? +1 : 0;
+        }
+
+        public boolean kmEquals(KmW other) {
+            return Math.abs(km - other.km) < EPSILON;
+        }
+
+        public double subtract(KmW other) {
+            return w - other.w;
+        }
+    } // class KmW
+
+    public static final WKmsOperation SUBTRACTION = new WKmsOperation() {
+
+        @Override
+        public WKms operate(WKms a, WKms b) {
+            return subtract(a, b);
+        }
+    };
+
+    protected WKmsOperation() {
+    }
+
+    public abstract WKms operate(WKms a, WKms b);
+
+    /**
+     * Subtract two series from each other, interpolate values
+     * missing in one series in the other.
+     */
+    public static WKms subtract(WKms minuend, WKms subtrahend) {
+
+        int M = minuend   .size();
+        int S = subtrahend.size();
+
+        // Don't subtract empty sets
+        if (M < 1 || S < 1) {
+            return new WKmsImpl();
+        }
+
+        KmW [] ms = new KmW[M];
+        KmW [] ss = new KmW[S];
+
+        for (int i = 0; i < M; ++i) {
+            ms[i] = new KmW(minuend.getKm(i), minuend.getW(i));
+        }
+
+        for (int i = 0; i < S; ++i) {
+            ss[i] = new KmW(subtrahend.getKm(i), subtrahend.getW(i));
+        }
+
+        Arrays.sort(ms);
+        Arrays.sort(ss);
+
+        // no overlap -> empty result set
+        if (ms[0].km > ss[S-1].km || ss[0].km > ms[M-1].km) {
+            return new WKmsImpl();
+        }
+
+        WKmsImpl result = new WKmsImpl();
+
+        int mi = 0;
+        int si = 0;
+
+        OUT: while (mi < M && si < S) {
+            KmW m = ms[mi];
+            KmW s = ss[si];
+
+            if (m.km + EPSILON < s.km) {
+                // minuend is before subtrahend
+
+                while (ms[mi].km + EPSILON < s.km) {
+                    if (++mi >= M) {
+                        break OUT;
+                    }
+                }
+
+                if (ms[mi].km + EPSILON > s.km) {
+                    double mw = Linear.linear(
+                        s.km,
+                        ms[mi-1].km, ms[mi].km,
+                        ms[mi-1].w,  ms[mi].w);
+                    result.add(s.km, mw - s.w);
+                    ++si;
+                }
+                else { // s.km == ms[mi].km
+                    result.add(s.km, ms[mi].subtract(s));
+                    ++mi;
+                    ++si;
+                }
+            }
+            else if (m.km > s.km + EPSILON) {
+                // subtrahend is before minuend
+
+                while (m.km > ss[si].km + EPSILON) {
+                    if (++si >= S) {
+                        break OUT;
+                    }
+                }
+
+                if (ss[si].km + EPSILON > m.km) {
+                    double sw = Linear.linear(
+                        m.km,
+                        ss[si-1].km, ss[si].km,
+                        ss[si-1].w,  ss[si].w);
+                    result.add(m.km, m.w - sw);
+                }
+                else { // ss[si].km == m.km
+                    result.add(m.km, m.subtract(ss[si]));
+                    ++mi;
+                    ++si;
+                }
+            }
+            else { // m.km == s.km
+                result.add(s.km, m.subtract(s));
+                ++mi;
+                ++si;
+            }
+        }
+
+        return result;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/AnnotationFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,61 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.AnnotationArtifact;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+/**
+ * Facet to access Annotations (landmarks, POIs) of a river.
+ */
+public class AnnotationFacet
+extends      DefaultFacet
+{
+    /** Logger for this class. */
+    private static final Logger logger = Logger.getLogger(AnnotationFacet.class);
+
+
+    /**
+     * Trivial Constructor.
+     */
+    public AnnotationFacet() {
+    }
+
+
+    /**
+     * Trivial Constructor for a AnnotationFacet.
+     *
+     * @param index       Database-Index to use.
+     * @param name        Name (~type) of Facet.
+     * @param description Description of Facet.
+     */
+    public AnnotationFacet(int index, String name, String description) {
+        super(index, name, description);
+    }
+
+
+    /**
+     * Get List of Annotations for river from Artifact.
+     *
+     * @param artifact (Annotation-)Artifact to query for list of Annotations.
+     * @param context  Ignored.
+     */
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        AnnotationArtifact annotationArtifact = (AnnotationArtifact) artifact;
+        return annotationArtifact.getAnnotations();
+    }
+
+
+    @Override
+    public Facet deepCopy() {
+        AnnotationFacet copy = new AnnotationFacet();
+        copy.set(this);
+        return copy;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,102 @@
+package de.intevation.flys.artifacts.model;
+
+import java.math.BigDecimal;
+
+import java.util.List;
+import java.util.Iterator;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.Annotation;
+import de.intevation.flys.model.Range;
+import de.intevation.flys.model.River;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class AnnotationsFactory {
+
+    public static List<Annotation> getAnnotations(River river) {
+        return getAnnotations(river.getName());
+    }
+
+
+    /**
+     * Get Annotations which do not have a "b" ("to")-value set.
+     *
+     * @param river name of the river of interest.
+     *
+     * @return List of Annotations for river which have only "a" ("from")
+     *          value set.
+     */
+    public static List<Annotation> getPointAnnotations(String river) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query rangesQuery = session.createQuery(
+            "from Range where river.name=:name and b = null");
+        rangesQuery.setParameter("name", river);
+        List<Range> ranges = rangesQuery.list();
+
+        Query query = session.createQuery(
+            "from Annotation where range in (:ranges) order by range.a");
+        query.setParameterList("ranges", ranges);
+        return query.list();
+    }
+
+
+    public static List<Annotation> getAnnotations(String river) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query rangesQuery = session.createQuery(
+            "from Range where river.name=:name");
+        rangesQuery.setParameter("name", river);
+        List<Range> ranges = rangesQuery.list();
+
+        Query query = session.createQuery(
+            "from Annotation where range in (:ranges) order by range.a");
+        query.setParameterList("ranges", ranges);
+        return query.list();
+    }
+
+
+    /**
+     * Get minimal "a" ("from") and maximal "b" ("to") value of annotations'
+     * ranges of a river.
+     *
+     * @param river name of the river of interest.
+     *
+     * @return Array containing minimal "a" and max "b" value of any
+     *         annotation stored for the given river.
+     */
+    public static double[] getAnnotationsBreadth(String river) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query minAQuery = session.createQuery(
+            "select min(a), max(b) from Range where river.name=:name");
+        minAQuery.setParameter("name", river);
+
+        double[] minAmaxB = {0.0f, 0.0f};
+        Object[] row = (Object[]) minAQuery.list().iterator().next();
+        minAmaxB[0] = ((BigDecimal) row[0]).doubleValue();
+        minAmaxB[1] = ((BigDecimal) row[1]).doubleValue();
+        return minAmaxB;
+    }
+
+
+    public static Iterator<Annotation> getAnnotationsIterator(String river) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query rangesQuery = session.createQuery(
+            "from Range where river.name=:name");
+        rangesQuery.setParameter("name", river);
+        List<Range> ranges = rangesQuery.list();
+
+        Query query = session.createQuery(
+            "from Annotation where range in (:ranges) order by range.a");
+        query.setParameterList("ranges", ranges);
+        return (Iterator<Annotation>)query.iterate();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,94 @@
+package de.intevation.flys.artifacts.model;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.Serializable;
+
+import de.intevation.artifacts.CallMeta;
+
+public class Calculation
+implements   Serializable
+{
+    public static class Problem
+    implements          Serializable
+    {
+        protected Double km;
+        protected String msg;
+
+        public Problem() {
+        }
+
+        public Problem(String msg) {
+            this.msg = msg;
+        }
+
+        public Problem(double km, String msg) {
+            this.km  = km;
+            this.msg = msg;
+        }
+
+        public Element toXML(Document document, CallMeta meta) {
+            // TODO: i18n
+            Element problem = document.createElement("problem");
+            if (km != null) {
+                problem.setAttribute("km", String.valueOf(km));
+            }
+            problem.setTextContent(msg);
+            return problem;
+        }
+    } // class Problem
+
+    protected List<Problem> problems;
+
+    public Calculation() {
+    }
+
+    public Calculation(String msg) {
+        addProblem(msg);
+    }
+
+    protected List<Problem> checkProblems() {
+        if (problems == null) {
+            problems = new ArrayList<Problem>();
+        }
+        return problems;
+    }
+
+    public void addProblem(String msg) {
+        checkProblems().add(new Problem(msg));
+    }
+
+    public void addProblem(double km, String msg) {
+        checkProblems().add(new Problem(km, msg));
+    }
+
+    public boolean hasProblems() {
+        return problems != null && !problems.isEmpty();
+    }
+
+    public int numProblems() {
+        return problems != null ? problems.size() : 0;
+    }
+
+    public List<Problem> getProblems() {
+        return problems;
+    }
+
+    public void toXML(Document document, CallMeta meta) {
+
+        Element root = document.createElement("problems");
+
+        if (hasProblems()) {
+            for (Problem problem: problems) {
+                root.appendChild(problem.toXML(document, meta));
+            }
+        }
+
+        document.appendChild(root);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation1.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,73 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.ArrayList;
+
+import org.apache.log4j.Logger;
+
+public class Calculation1
+extends      Calculation
+{
+    private static Logger logger = Logger.getLogger(Calculation1.class);
+
+    protected double [] kms;
+    protected double [] qs;
+    protected double [] ws;
+    protected double    refKm;
+
+    public Calculation1() {
+    }
+
+    public Calculation1(
+        double [] kms,
+        double [] qs,
+        double [] ws,
+        double    refKm
+    ) {
+        this.kms   = kms;
+        this.qs    = qs;
+        this.ws    = ws;
+        this.refKm = refKm;
+    }
+
+    public CalculationResult calculate(WstValueTable wst) {
+
+        ArrayList<WQKms> results = new ArrayList<WQKms>();
+
+        String    prefix;
+        double [] origData;
+
+        if (ws != null) { prefix = "W="; origData = ws; }
+        else            { prefix = "Q="; origData = qs; }
+
+        int oldNumProblems = numProblems();
+
+        for (int i = 0; i < qs.length; i++) {
+
+            double [] oqs = new double[kms.length];
+            double [] ows = new double[kms.length];
+
+            boolean success =
+                wst.interpolate(qs[i], refKm, kms, ows, oqs, this) != null;
+
+            int newNumProblems = numProblems();
+
+            if (success) {
+                WQKms result = new WQKms(kms, oqs, ows, prefix + origData[i]);
+                if (oldNumProblems != newNumProblems) {
+                    logger.debug(
+                        qs[i] + " caused " + (newNumProblems-oldNumProblems) +
+                        " new problem(s).");
+                    result.removeNaNs();
+                }
+                results.add(result);
+            }
+
+            oldNumProblems = newNumProblems;
+        }
+
+        return new CalculationResult(
+            results.toArray(new WQKms[results.size()]),
+            this);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation2.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,49 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.Arrays;
+
+import org.apache.log4j.Logger;
+
+public class Calculation2
+extends      Calculation
+{
+    private static Logger logger = Logger.getLogger(Calculation2.class);
+
+    protected double km;
+
+    public Calculation2() {
+    }
+
+    public Calculation2(double km) {
+        this.km = km;
+    }
+
+    public CalculationResult calculate(WstValueTable wst) {
+
+        logger.debug("Calculation2.calculate");
+
+        double [][] wqs = wst.interpolateWQ(km, this);
+
+        if (wqs == null || wqs[0].length == 0) {
+            logger.debug("Cannot compute discharge curve data.");
+            addProblem("Cannot compute discharge curve data.");
+            return new CalculationResult(new WQKms[0], this);
+        }
+
+        double [] ws = wqs[0];
+        double [] qs = wqs[1];
+        double [] kms = new double[ws.length];
+
+        Arrays.fill(kms, km);
+
+        WQKms wqkms = new WQKms(kms, qs, ws, String.valueOf(km));
+
+        if (hasProblems()) {
+            logger.debug("found + "+numProblems()+" problems.");
+            wqkms.removeNaNs();
+        }
+
+        return new CalculationResult(new WQKms[] { wqkms }, this);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation3.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,37 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+public class Calculation3
+extends      Calculation
+{
+    private static Logger logger = Logger.getLogger(Calculation3.class);
+
+    protected double    km;
+    protected int    [] days;
+    protected double [] qs;
+
+    public Calculation3() {
+    }
+
+    public Calculation3(double km, int [] days, double [] qs) {
+        this.km   = km;
+        this.days = days;
+        this.qs   = qs;
+    }
+
+    public CalculationResult calculate(WstValueTable wst) {
+
+        double [] ws = wst.interpolateW(km, qs, new double[qs.length], this);
+
+        WQDay wqday = new WQDay(days, ws, qs);
+
+        if (hasProblems()) {
+            logger.debug("calculation caused "+numProblems()+" problem(s).");
+            wqday.removeNaNs();
+        }
+
+        return new CalculationResult(wqday, this);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Calculation4.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,309 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Collections;
+
+import de.intevation.flys.utils.DoubleUtil;
+
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Gauge;
+
+import de.intevation.flys.artifacts.model.WstValueTable.QPosition;
+
+import de.intevation.flys.artifacts.math.Function;
+import de.intevation.flys.artifacts.math.Linear;
+import de.intevation.flys.artifacts.math.Identity;
+import de.intevation.flys.artifacts.math.BackJumpCorrector;
+
+import org.apache.log4j.Logger;
+
+public class Calculation4
+extends      Calculation
+{
+    private static Logger logger = Logger.getLogger(Calculation4.class);
+
+    public static final double MINIMAL_STEP_WIDTH = 1e-5;
+
+    public static final Comparator<Segment> REF_CMP =
+        new Comparator<Segment>() {
+            public int compare(Segment a, Segment b) {
+                double d = a.referencePoint - b.referencePoint;
+                if (d < 0d) return -1;
+                return d > 0d ? +1 : 0;
+            }
+        };
+
+    protected List<Segment> segments;
+
+    protected boolean       isQ;
+
+    public Calculation4() {
+    }
+
+    public Calculation4(List<Segment> segments, River river, boolean isQ) {
+
+        this.segments = segments;
+        this.isQ      = isQ;
+
+        int numResults = -1;
+
+        // assign reference points
+        for (Segment segment: segments) {
+            Gauge gauge = river.maxOverlap(segment.getFrom(), segment.getTo());
+
+            if (gauge == null) {
+                logger.warn("no gauge found. Defaults to mid point.");
+                segment.setReferencePoint(
+                    0.5*(segment.getFrom()+segment.getTo()));
+            }
+            else {
+                double ref = gauge.getStation().doubleValue();
+                logger.debug(
+                    "reference gauge: " + gauge.getName() +
+                    " (km " + ref + ")");
+                segment.setReferencePoint(ref);
+            }
+
+            double [] values = segment.values;
+
+            if (numResults == -1) {
+                numResults = values.length;
+            }
+            else if (numResults != values.length) {
+                throw new IllegalArgumentException("wrong length of values");
+            }
+
+            // convert to Q if needed
+            if (!isQ && gauge != null) {
+                double [][] table = new DischargeTables(
+                    river.getName(), gauge.getName()).getFirstTable();
+
+                // need the original values for naming
+                segment.backup();
+
+                for (int i = 0; i < values.length; ++i) {
+                    values[i] = DischargeTables.getQForW(table, values[i]);
+                }
+            }
+        } // for all segments
+
+        Collections.sort(segments, REF_CMP);
+    }
+
+    public CalculationResult calculate(
+        WstValueTable table,
+        double from, double to, double step
+    ) {
+        boolean debug = logger.isDebugEnabled();
+
+        if (debug) {
+            logger.debug(
+                "calculate from " + from + " to " + to + " step " + step);
+            logger.debug("# segments: " + segments.size());
+            for (Segment segment: segments) {
+                logger.debug("  " + segment);
+            }
+        }
+
+        if (segments.isEmpty()) {
+            logger.debug("no segments found");
+            // TODO: I18N
+            addProblem("no segments found");
+            return new CalculationResult(new WQKms[0], this);
+        }
+
+        int numResults = segments.get(0).values.length;
+
+        if (numResults < 1) {
+            logger.debug("no values given");
+            // TODO: I18N
+            addProblem("no values given");
+            return new CalculationResult(new WQKms[0], this);
+        }
+
+
+        WQKms [] results = new WQKms[numResults];
+        for (int i = 0; i < results.length; ++i) {
+            results[i] = new WQKms();
+        }
+
+        if (Math.abs(step) < MINIMAL_STEP_WIDTH) {
+            step = MINIMAL_STEP_WIDTH;
+        }
+
+        if (from > to) {
+            step = -step;
+        }
+
+        QPosition [] qPositions = new QPosition[numResults];
+
+        Function [] functions = new Function[numResults];
+
+        double [] out = new double[2];
+
+        Segment sentinel = new Segment(Double.MAX_VALUE);
+        Segment s1 = sentinel, s2 = sentinel;
+
+        for (double pos = from;
+             from < to ? pos <= to : pos >= to;
+             pos = DoubleUtil.round(pos + step)
+        ) {
+            if (pos < s1.referencePoint || pos > s2.referencePoint) {
+                if (debug) {
+                    logger.debug("need to find new interval for " + pos);
+                }
+                // find new interval
+                if (pos <= segments.get(0).referencePoint) {
+                    // before first segment -> "gleichwertig"
+                    if (debug) {
+                        logger.debug("before first segment -> gleichwertig");
+                    }
+                    Segment   first  = segments.get(0);
+                    double [] values = first.values;
+                    double    refPos = first.referencePoint;
+                    for (int i = 0; i < qPositions.length; ++i) {
+                        qPositions[i] = table.getQPosition(
+                            refPos, values[i]);
+                    }
+                    sentinel.setReferencePoint(-Double.MAX_VALUE);
+                    s1 = sentinel;
+                    s2 = segments.get(0);
+                    Arrays.fill(functions, Identity.IDENTITY);
+                }
+                else if (pos >= segments.get(segments.size()-1).referencePoint) {
+                    // after last segment -> "gleichwertig"
+                    if (debug) {
+                        logger.debug("after last segment -> gleichwertig");
+                    }
+                    Segment   last   = segments.get(segments.size()-1);
+                    double [] values = last.values;
+                    double    refPos = last.referencePoint;
+                    for (int i = 0; i < qPositions.length; ++i) {
+                        qPositions[i] = table.getQPosition(
+                            refPos, values[i]);
+                    }
+                    sentinel.setReferencePoint(Double.MAX_VALUE);
+                    s1 = last;
+                    s2 = sentinel;
+                    Arrays.fill(functions, Identity.IDENTITY);
+                }
+                else { // "ungleichwertig"
+                    // find matching interval
+                    if (debug) {
+                        logger.debug("in segments -> ungleichwertig");
+                    }
+                    s1 = s2 = null;
+                    for (int i = 1, N = segments.size(); i < N; ++i) {
+                        Segment si1 = segments.get(i-1);
+                        Segment si  = segments.get(i);
+                        if (debug) {
+                            logger.debug("check " + pos + " in " +
+                                si1.referencePoint + " - " + si.referencePoint);
+                        }
+                        if (pos >= si1.referencePoint
+                        &&  pos <= si. referencePoint) {
+                            s1 = si1;
+                            s2 = si;
+                            break;
+                        }
+                    }
+
+                    if (s1 == null) {
+                        throw new IllegalStateException("no interval found");
+                    }
+
+                    Segment anchor, free;
+
+                    if (from > to) { anchor = s1; free = s2; }
+                    else           { anchor = s2; free = s1; }
+
+                    // build transforms based on "gleichwertiger" phase
+                    for (int i = 0; i < qPositions.length; ++i) {
+                        QPosition qi = table.getQPosition(
+                            anchor.referencePoint,
+                            anchor.values[i]);
+
+                        if ((qPositions[i] = qi) == null) {
+                            // TODO: I18N
+                            addProblem(pos, "cannot find q = " + anchor.values[i]);
+                            functions[i] = Identity.IDENTITY;
+                        }
+                        else {
+                            double qA = table.getQ(qi, anchor.referencePoint);
+                            double qF = table.getQ(qi, free  .referencePoint);
+
+                            functions[i] = Double.isNaN(qA) || Double.isNaN(qF)
+                                ? Identity.IDENTITY
+                                : new Linear(
+                                    qA, qF,
+                                    anchor.values[i], free.values[i]);
+
+                            if (debug) {
+                                logger.debug(
+                                    anchor.referencePoint + ": " +
+                                    qA + " -> " + functions[i].value(qA) +
+                                    " / " + free.referencePoint + ": " +
+                                    qF + " -> " + functions[i].value(qF));
+                            }
+                        }
+                    } // build transforms
+                } // "ungleichwertiges" interval
+            } // find matching interval
+
+            for (int i = 0; i < qPositions.length; ++i) {
+                QPosition qPosition = qPositions[i];
+
+                if (qPosition == null) {
+                    continue;
+                }
+
+                if (table.interpolate(pos, out, qPosition, functions[i])) {
+                    results[i].add(out[0], out[1], pos);
+                }
+                else {
+                    // TODO: I18N
+                    addProblem(pos, "cannot interpolate w/q");
+                }
+            }
+        }
+
+        // Backjump correction
+        for (int i = 0; i < results.length; ++i) {
+            BackJumpCorrector bjc = new BackJumpCorrector();
+
+            double [] ws  = results[i].getWs();
+            double [] kms = results[i].getKms();
+
+            if (bjc.doCorrection(kms, ws, this)) {
+                results[i] = new WQCKms(results[i], bjc.getCorrected());
+            }
+        }
+
+        // name the curves
+        for (int i = 0; i < results.length; ++i) {
+            results[i].setName(createName(i));
+        }
+
+        return new CalculationResult(results, this);
+    }
+
+    protected String createName(int index) {
+        // TODO: I18N
+        StringBuilder sb = new StringBuilder(isQ ? "Q" : "W");
+        sb.append(" benutzerdefiniert (");
+        for (int i = 0, N = segments.size(); i < N; ++i) {
+            if (i > 0) {
+                sb.append("; ");
+            }
+            Segment segment = segments.get(i);
+            sb.append((segment.backup != null
+                ? segment.backup
+                : segment.values)[index]);
+        }
+        sb.append(')');
+        return sb.toString();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CalculationMessage.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,45 @@
+package de.intevation.flys.artifacts.model;
+
+import de.intevation.artifacts.Message;
+
+
+public class CalculationMessage implements Message {
+
+    protected String message;
+    protected int    steps;
+    protected int    currentStep;
+
+
+    public CalculationMessage() {
+    }
+
+
+    public CalculationMessage(int steps, int currentStep, String message) {
+        this.steps       = steps;
+        this.currentStep = currentStep;
+        this.message     = message;
+    }
+
+
+    public int getSteps() {
+        return steps;
+    }
+
+
+    public int getCurrentStep() {
+        return currentStep;
+    }
+
+
+    public String getMessage() {
+        return message;
+    }
+
+
+    @Override
+    public String getText() {
+        return
+            String.valueOf(currentStep) + "/" + String.valueOf(steps) +
+            " - " + getMessage();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CalculationResult.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,35 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+public class CalculationResult
+implements   Serializable
+{
+    protected Object      data;
+    protected Calculation report;
+
+    public CalculationResult() {
+    }
+
+    public CalculationResult(Object data, Calculation report) {
+        this.data   = data;
+        this.report = report;
+    }
+
+    public Object getData() {
+        return data;
+    }
+
+    public void setData(Object data) {
+        this.data = data;
+    }
+
+    public Calculation getReport() {
+        return report;
+    }
+
+    public void setReport(Calculation report) {
+        this.report = report;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,55 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+
+/**
+ * Trival Facet for Cross Sections.
+ */
+public class CrossSectionFacet
+extends      DefaultFacet
+implements   FacetTypes {
+
+    private static Logger logger = Logger.getLogger(CrossSectionFacet.class);
+
+    protected ComputeType type;
+
+    /** Trivial constructor, set (maybe localized) description. */
+    public CrossSectionFacet(String description) {
+        super(0, CROSS_SECTION, description);
+        type = ComputeType.ADVANCE;
+    }
+
+
+    /**
+     * Gets dummy data.
+     */
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for cross section");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        return winfo.getCrossSectionData();
+    }
+
+
+    /** Do a deep copy. */
+    @Override 
+    public Facet deepCopy() {
+        CrossSectionFacet copy = new CrossSectionFacet(this.description);
+        copy.set(this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,45 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.CrossSection;
+import de.intevation.flys.model.River;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+/**
+ * Get Cross Sections.
+ */
+public class CrossSectionFactory {
+
+    /**
+     * Get CrossSections for an instantiated River.
+     *
+     * @param river river object.
+     *
+     * @return List of Cross Sections of river.
+     */
+    public static List<CrossSection> getCrossSections(River river) {
+        return getCrossSections(river.getName());
+    }
+
+
+    /**
+     * Get Cross Sections for a river by name.
+     *
+     * @param river name of the river of interest.
+     *
+     * @return List of Cross Sections of river.
+     */
+    public static List<CrossSection> getCrossSections(String riverName) {
+        Session session = SessionHolder.HOLDER.get();
+        Query query = session.createQuery(
+                "from CrossSection where river.name = :rivername");
+        query.setParameter("rivername", riverName);
+        return query.list();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionWaterLineFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,51 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+
+/**
+ * Facet for Waterlines in Cross Sections.
+ */
+public class CrossSectionWaterLineFacet
+extends      DefaultFacet
+implements   FacetTypes {
+
+    private static Logger logger = Logger.getLogger(CrossSectionWaterLineFacet.class);
+
+
+    /** Trivial constructor, set (maybe localized) description. */
+    public CrossSectionWaterLineFacet(String description) {
+        super(0, CROSS_SECTION_WATER_LINE, description);
+    }
+
+
+    /**
+     * Gets dummy data.
+     */
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for cross section water line");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        return winfo.getWaterLines();
+    }
+
+
+    /** Do a deep copy. */
+    @Override 
+    public Facet deepCopy() {
+        CrossSectionWaterLineFacet copy = new CrossSectionWaterLineFacet(this.description);
+        copy.set(this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/DataFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,91 @@
+package de.intevation.flys.artifacts.model;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+public class DataFacet
+extends      DefaultFacet
+{
+    protected ComputeType type;
+    protected String      hash;
+    protected String      stateId;
+
+
+    /** Trivial constructor. */
+    public DataFacet() {
+    }
+
+    /**
+     * Defaults to ADVANCE Compute type.
+     * @param name Name of the facet.
+     * @param description maybe localized description of the facet.
+     */
+    public DataFacet(String name, String description) {
+        this(name, description, ComputeType.ADVANCE);
+    }
+
+    public DataFacet(String name, String description, ComputeType type) {
+        this(name, description, type, null);
+    }
+
+    public DataFacet(
+        String      name,
+        String      description,
+        ComputeType type,
+        String      hash
+    ) {
+        super(name, description);
+        this.type = type;
+        this.hash = hash;
+    }
+
+
+    public DataFacet(
+        String      name,
+        String      description,
+        ComputeType type,
+        String      hash,
+        String      stateId
+    ) {
+        super(name, description);
+        this.type    = type;
+        this.hash    = hash;
+        this.stateId = stateId;
+    }
+
+
+    /**
+     * Return computation result.
+     */
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        FLYSArtifact flys = (FLYSArtifact)artifact;
+        String    theHash = (hash != null) ? hash : flys.hash();
+
+        return (stateId != null && stateId.length() > 0)
+            ? flys.compute(context, theHash, stateId, type, false)
+            : flys.compute(context, theHash, type, false);
+    }
+
+
+    /**
+     * Return a deep copy.
+     */
+    @Override
+    public Facet deepCopy() {
+        DataFacet copy = new DataFacet();
+        copy.set(this);
+        copy.type    = type;
+        copy.hash    = hash;
+        copy.stateId = stateId;
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,234 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Arrays;
+import java.util.Comparator;
+
+import java.io.Serializable;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.DischargeTable;
+import de.intevation.flys.model.DischargeTableValue;
+
+public class DischargeTables
+implements   Serializable
+{
+    private static Logger log = Logger.getLogger(DischargeTables.class);
+
+    public static final double DEFAULT_SCALE = 100.0;
+
+    public static final int MASTER = 0;
+
+    protected List<String> gaugeNames;
+
+    protected String riverName;
+
+    protected double scale;
+
+    protected int    kind;
+
+    protected Map<String, double [][]> values;
+
+    public DischargeTables() {
+    }
+
+    public DischargeTables(String riverName, String gaugeName) {
+        this(riverName, gaugeName, MASTER);
+    }
+
+    public DischargeTables(String riverName, String gaugeName, int kind) {
+        this(riverName, new String [] { gaugeName }, kind);
+    }
+
+    public DischargeTables(String riverName, String [] gaugeNames) {
+        this(riverName, gaugeNames, MASTER);
+    }
+
+    public DischargeTables(String riverName, String [] gaugeNames, int kind) {
+        this(riverName, Arrays.asList(gaugeNames), kind);
+    }
+
+    public DischargeTables(
+        String       riverName,
+        List<String> gaugeNames,
+        int          kind
+    ) {
+        scale           = Double.NaN;
+        this.kind       = kind;
+        this.riverName  = riverName;
+        this.gaugeNames = gaugeNames;
+    }
+
+    public double [][] getFirstTable() {
+        return getFirstTable(DEFAULT_SCALE);
+    }
+
+    public double [][] getFirstTable(double scale) {
+        Map<String, double [][]> values = getValues(scale);
+        for (double [][] table: values.values()) {
+            return table;
+        }
+        return null;
+    }
+
+    public Map<String, double [][]> getValues() {
+        return getValues(DEFAULT_SCALE);
+    }
+
+    public Map<String, double [][]> getValues(double scale) {
+        if (values == null || scale != this.scale) {
+            values = loadValues(scale);
+            this.scale = scale;
+        }
+        return values;
+    }
+
+    protected Map<String, double [][]> loadValues(double scale) {
+        Map<String, double [][]> values = new HashMap<String, double [][]>();
+
+        Session session = SessionHolder.HOLDER.get();
+
+        Query gaugeQuery = session.createQuery(
+            "from Gauge where name=:gauge and river.name=:river");
+        gaugeQuery.setParameter("river", riverName);
+
+        for (String gaugeName: gaugeNames) {
+            gaugeQuery.setParameter("gauge", gaugeName);
+            List<Gauge> gauges = gaugeQuery.list();
+            if (gauges.isEmpty()) {
+                log.warn(
+                    "no gauge '"+gaugeName+"' at river '"+riverName+"'");
+                continue;
+            }
+            Gauge gauge = gauges.get(0);
+
+            List<DischargeTable> tables = gauge.getDischargeTables();
+
+            if (tables.isEmpty()) {
+                log.warn(
+                    "no discharge table for gauge '" + gaugeName + "'");
+                continue;
+            }
+
+            // TODO: Filter by time interval
+            DischargeTable table = tables.get(0);
+
+            List<DischargeTableValue> dtvs =
+                table.getDischargeTableValues();
+
+            final double [][] vs = new double[2][dtvs.size()];
+
+            boolean qSorted = true;
+
+            double lastQ = -Double.MAX_VALUE;
+
+            int idx = 0;
+            for (DischargeTableValue dtv: dtvs) {
+                double q = dtv.getQ().doubleValue();
+                vs[0][idx] = q * scale;
+                vs[1][idx] = dtv.getW().doubleValue() * scale;
+                ++idx;
+
+                if (qSorted && lastQ > q) {
+                    qSorted = false;
+                }
+                lastQ = q;
+            }
+
+            if (!qSorted) {
+                log.debug("need to sort by q values");
+                // TODO: Do this db level.
+                // XXX: This is so ugly :-(
+                Integer [] indices = new Integer[vs[0].length];
+                for (int i = 0; i < indices.length; ++i) {
+                    indices[i] = i;
+                }
+
+                Arrays.sort(indices, new Comparator<Integer>() {
+                    public int compare(Integer a, Integer b) {
+                        double va = vs[1][a];
+                        double vb = vs[1][b];
+                        double d = va - vb;
+                        if (d < 0.0) return -1;
+                        if (d > 0.0) return +1;
+                        return 0;
+                    }
+                });
+
+                double [][] vs2 = new double[2][vs[0].length];
+                for (int i = 0; i < indices.length; ++i) {
+                    vs2[0][i] = vs[0][indices[i]];
+                    vs2[1][i] = vs[1][indices[i]];
+                }
+                values.put(gaugeName, vs2);
+            }
+            else {
+                values.put(gaugeName, vs);
+            }
+
+        }
+
+        return values;
+    }
+
+    public static double getQForW(double [][] values, double w) {
+
+        boolean debug = log.isDebugEnabled();
+
+        if (debug) {
+            log.debug("calculating getQForW(" + w + ")");
+        }
+
+        int index = Arrays.binarySearch(values[1], w);
+        if (index >= 0) {
+            return values[0][index];
+        }
+
+        index = -index - 1; // insert position
+
+        if (index < 1 || index >= values[0].length) {
+            // do not extraploate
+            if (debug) {
+                log.debug("we do not extrapolate: NaN");
+            }
+            return Double.NaN;
+        }
+
+        double w1 = values[1][index-1];
+        double w2 = values[1][index  ];
+        double q1 = values[0][index-1];
+        double q2 = values[0][index  ];
+
+        // q1 = m*w1 + b
+        // q2 = m*w2 + b
+        // q2 - q1 = m*(w2 - w1)
+        // m = (q2 - q1)/(w2 - w1) # w2 != w1
+        // b = q1 - m*w1
+
+        double q;
+        if (w1 == w2) {
+            q = 0.5*(q1 + q2);
+            if (debug) {
+                log.debug("same w1 and w1: " + w1);
+            }
+        }
+        else {
+            double m = (q2 - q1)/(w2 - w1);
+            double b = q1 - m*w1;
+            q = w*m + b;
+        }
+        if (debug) {
+            log.debug("Q(" + w + ") = " + q);
+        }
+        return q;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/DurationCurveFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,46 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+
+public class DurationCurveFacet extends DefaultFacet {
+
+    private static Logger logger = Logger.getLogger(DurationCurveFacet.class);
+
+    public DurationCurveFacet() {
+    }
+
+    public DurationCurveFacet(String name, String description) {
+        super(0, name, description);
+    }
+
+
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for duration curve data");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult cr = (CalculationResult)winfo.compute(
+            context, ComputeType.ADVANCE, false);
+
+        return cr.getData();
+    }
+
+    @Override 
+    public Facet deepCopy() {
+        DurationCurveFacet copy = new DurationCurveFacet();
+        copy.set(this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FacetTypes.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,38 @@
+package de.intevation.flys.artifacts.model;
+
+public interface FacetTypes {
+
+    String FLOODMAP_WSPLGEN       = "floodmap.wsplgen";
+    String FLOODMAP_BARRIERS      = "floodmap.barriers";
+    String FLOODMAP_RIVERAXIS     = "floodmap.riveraxis";
+    String FLOODMAP_WMSBACKGROUND = "floodmap.wmsbackground";
+
+    String DISCHARGE_LONGITUDINAL_W = "discharge_longitudinal_section.w";
+    String DISCHARGE_LONGITUDINAL_Q = "discharge_longitudinal_section.q";
+    String DISCHARGE_LONGITUDINAL_C = "discharge_longitudinal_section.c";
+
+    String LONGITUDINAL_W = "longitudinal_section.w";
+    String LONGITUDINAL_Q = "longitudinal_section.q";
+    String LONGITUDINAL_ANNOTATION = "longitudinal_section.annotations";
+
+    String W_DIFFERENCES = "w_differences";
+
+    String COMPUTED_DISCHARGE_Q = "computed_discharge_curve.q";
+    String COMPUTED_DISCHARGE_MAINVALUES_Q = "computed_discharge_curve.mainvalues.q";
+    String COMPUTED_DISCHARGE_MAINVALUES_W = "computed_discharge_curve.mainvalues.w";
+
+    String CROSS_SECTION = "cross_section";
+    String CROSS_SECTION_WATER_LINE = "cross_section_water_line";
+
+    String DISCHARGE_CURVE = "discharge_curve.curve";
+
+    String DURATION_W = "duration_curve.w";
+    String DURATION_Q = "duration_curve.q";
+
+    String CSV = "csv";
+    String WST = "wst";
+    String AT  = "at";
+
+    String REPORT = "report";
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/GaugesFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,57 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.Range;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+public class GaugesFactory
+{
+    public static List<Gauge> getGauges(River river) {
+        return getGauges(river.getName());
+    }
+
+    public static List<Gauge> getGauges(String river) {
+        Session session = SessionHolder.HOLDER.get();
+        Query query = session.createQuery(
+            "from Gauge where river.name=:name");
+        query.setParameter("name", river);
+        return query.list();
+    }
+
+    public static List<Gauge> filterRanges(
+        List<Gauge>     gauges,
+        List<double []> ranges
+    ) {
+        // XXX: Inefficent!
+        ArrayList<Range> rs = new ArrayList<Range>();
+        for (double [] range: ranges) {
+            double a = range[0];
+            double b = range[1];
+            rs.add(new Range(Math.min(a, b), Math.max(a, b), null));
+        }
+        return filter(gauges, rs);
+    }
+
+    public static List<Gauge> filter(List<Gauge> gauges, List<Range> ranges) {
+        // TODO: Make it an HQL filter!
+        ArrayList<Gauge> out = new ArrayList<Gauge>();
+        for (Gauge gauge: gauges) {
+            Range range = gauge.getRange();
+            for (Range cmp: ranges) {
+                if (range.intersects(cmp)) {
+                    out.add(gauge);
+                    break;
+                }
+            }
+        }
+        return out;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LayerInfo.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,87 @@
+package de.intevation.flys.artifacts.model;
+
+
+public class LayerInfo {
+
+    protected String name;
+    protected String type;
+    protected String directory;
+    protected String data;
+    protected String group;
+    protected String groupTitle;
+    protected String title;
+
+
+    public LayerInfo(
+        String name,
+        String type,
+        String directory,
+        String data,
+        String title)
+    {
+        this(name, type, directory, data, title, null, null);
+    }
+
+
+    public LayerInfo(
+        String name,
+        String type,
+        String directory,
+        String data,
+        String title,
+        String group,
+        String groupTitle
+    ) {
+        this.name       = name;
+        this.type       = type;
+        this.directory  = directory;
+        this.data       = data;
+        this.group      = group;
+        this.groupTitle = groupTitle;
+        this.title      = title;
+    }
+
+
+    public String getName() {
+        return name;
+    }
+
+
+    public String getType() {
+        return type;
+    }
+
+
+    public String getDirectory() {
+        return directory;
+    }
+
+
+    public String getData() {
+        return data;
+    }
+
+
+    public String getGroup() {
+        return group;
+    }
+
+
+    public String getGroupTitle() {
+        return groupTitle;
+    }
+
+
+    public String getTitle() {
+        return title;
+    }
+
+
+    public String getStyle() {
+        // TODO IMPLEMENT ME
+        // The style of a layer depends on the theme that might be configured
+        // by the user (stored in the attribute of the CollectionItem).
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/MainValuesFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,80 @@
+package de.intevation.flys.artifacts.model;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import de.intevation.flys.backend.SessionHolder;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.MainValue;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class MainValuesFactory {
+
+    private static Logger logger = Logger.getLogger(MainValuesFactory.class);
+
+    public static List<MainValue> getMainValues(Gauge gauge) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createQuery(
+            "from MainValue where gauge=:gauge");
+        query.setParameter("gauge", gauge);
+
+        return query.list();
+    }
+
+
+    /**
+     * Returns an array of [days, qs] necessary to create duration curves.
+     *
+     * @param gauge The selected gauge.
+     *
+     * @return a 2dim array of [days, qs] where days is an int[] and qs is
+     * an double[].
+     */
+    public static Object[] getDurationCurveData(Gauge gauge) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createQuery(
+            "select cast(nmv.name as integer) as days, mv.value as q " +
+            "from MainValue as mv " +
+            "join mv.mainValue as nmv " +
+            "join nmv.type mvt " +
+            "where mvt.name = 'D' and mv.gauge.id = :gauge_id " +
+            "order by days");
+
+        query.setParameter("gauge_id", gauge.getId());
+
+        List<Object> results = query.list();
+        int[]        days    = new int[results.size()];
+        double[]     qs      = new double[results.size()];
+
+        int idx = 0;
+
+        for (Object obj: results) {
+            Object[] arr = (Object[]) obj;
+
+            try {
+                int  day = ((Integer)    arr[0]).intValue();
+                double q = ((BigDecimal) arr[1]).doubleValue();
+
+                days[idx] = day;
+                qs[idx++] = q;
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        return new Object[] { days, qs };
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/MainValuesQFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,49 @@
+package de.intevation.flys.artifacts.model;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.MainValuesArtifact;
+
+/**
+ * Facet to show Main Q Values.
+ */
+public class MainValuesQFacet
+extends      DefaultFacet
+implements   FacetTypes {
+
+    /** Trivial Constructor. */
+    public MainValuesQFacet(String description) {
+        this.description = description;
+        name = COMPUTED_DISCHARGE_MAINVALUES_Q;
+        index = 0;
+    }
+
+
+    /**
+     * Returns the data this facet requires.
+     *
+     * @param artifact the owner artifact.
+     * @param context  the CallContext (ignored).
+     *
+     * @return the data.
+     */
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        MainValuesArtifact mvArtifact = (MainValuesArtifact) artifact;
+        return mvArtifact.getMainValuesQ();
+    }
+
+
+    /**
+     * Create a deep copy of this Facet.
+     * @return a deep copy.
+     */
+    @Override
+    public MainValuesQFacet deepCopy() {
+        MainValuesQFacet copy = new MainValuesQFacet(description);
+        copy.set(this);
+        return copy;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/MainValuesWFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,50 @@
+package de.intevation.flys.artifacts.model;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.MainValuesArtifact;
+
+/**
+ * Facet to show Main W Values.
+ */
+public class MainValuesWFacet
+extends      DefaultFacet
+implements   FacetTypes {
+
+    /** Trivial Constructor. */
+    public MainValuesWFacet(String description) {
+        this.description = description;
+        name = COMPUTED_DISCHARGE_MAINVALUES_W;
+        index = 0;
+    }
+
+
+    /**
+     * Returns the data this facet requires.
+     *
+     * @param artifact the owner artifact.
+     * @param context  the CallContext (ignored).
+     *
+     * @return the data.
+     */
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        MainValuesArtifact mvArtifact = (MainValuesArtifact) artifact;
+        return mvArtifact.getMainValuesW();
+    }
+
+
+    /**
+     * Create a deep copy of this Facet.
+     * @return a deep copy.
+     */
+    @Override
+    public MainValuesWFacet deepCopy() {
+        MainValuesWFacet copy = new MainValuesWFacet(description);
+        copy.set(this);
+        return copy;
+    }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ManagedDomFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,133 @@
+package de.intevation.flys.artifacts.model;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+
+
+public class ManagedDomFacet extends ManagedFacet {
+
+    protected Element facet;
+
+
+    public ManagedDomFacet(Element facet) {
+        super(null, -1, null, null, -1, -1);
+
+        this.facet = facet;
+    }
+
+
+    @Override
+    public int getIndex() {
+        if (this.index < 0) {
+            String index = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "index");
+
+            if (index != null && index.length() > 0) {
+                this.index = Integer.parseInt(index);
+            }
+        }
+
+        return this.index;
+    }
+
+
+    @Override
+    public String getName() {
+        if (this.name == null || this.name.length() == 0) {
+            String name = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "facet");
+
+            this.name = name;
+        }
+
+        return this.name;
+    }
+
+
+    @Override
+    public String getDescription() {
+        if (this.description == null || this.description.length() == 0) {
+            String description = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "description");
+
+            this.description = description;
+        }
+
+        return this.description;
+    }
+
+
+    @Override
+    public int getPosition() {
+        if (this.position < 0) {
+            String position = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "pos");
+
+            if (position != null && position.length() > 0) {
+                this.position = Integer.parseInt(position);
+            }
+        }
+
+        return this.position;
+    }
+
+
+    @Override
+    public void setPosition(int position) {
+        this.position = position;
+
+        facet.setAttributeNS(
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            "pos",
+            String.valueOf(position));
+    }
+
+
+    @Override
+    public int getActive() {
+        if (this.active < 0) {
+            String active = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "active");
+
+            if (active != null && active.length() > 0) {
+                this.active = Integer.parseInt(active);
+            }
+        }
+
+        return this.active;
+    }
+
+
+    @Override
+    public void setActive(int active) {
+        this.active = active;
+
+        facet.setAttributeNS(
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            "active",
+            String.valueOf(active));
+    }
+
+
+    @Override
+    public String getArtifact() {
+        if (this.uuid == null || this.uuid.length() == 0) {
+            String uuid = facet.getAttributeNS(
+                ArtifactNamespaceContext.NAMESPACE_URI, "artifact");
+
+            this.uuid = uuid;
+        }
+
+        return this.uuid;
+    }
+
+
+    @Override
+    public Node toXML(Document doc) {
+        return doc.importNode(facet, true);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ManagedFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,100 @@
+package de.intevation.flys.artifacts.model;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+public class ManagedFacet extends DefaultFacet {
+
+    /** The uuid of the owner artifact.*/
+    protected String uuid;
+
+    /** A property that determines the position of this facet.*/
+    protected int position;
+
+    /** A property that determines if this facet is active or not.*/
+    protected int active;
+
+    public ManagedFacet() {
+    }
+
+    public ManagedFacet(
+        String  name,
+        int     index,
+        String  desc,
+        String  uuid,
+        int     pos,
+        int     active)
+    {
+        super(index, name, desc);
+
+        this.uuid     = uuid;
+        this.position = pos;
+        this.active   = active;
+    }
+
+
+    public void setPosition(int pos) {
+        this.position = pos;
+    }
+
+
+    public int getPosition() {
+        return position;
+    }
+
+
+    public void setActive(int active) {
+        this.active = active;
+    }
+
+
+    public int getActive() {
+        return active;
+    }
+
+
+    public String getArtifact() {
+        return uuid;
+    }
+
+
+    public Node toXML(Document doc) {
+        ElementCreator ec = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element facet = ec.create("theme");
+        ec.addAttr(facet, "artifact", getArtifact(), true);
+        ec.addAttr(facet, "facet", getName(), true);
+        ec.addAttr(facet, "pos", String.valueOf(getPosition()), true);
+        ec.addAttr(facet, "active", String.valueOf(getActive()), true);
+        ec.addAttr(facet, "index", String.valueOf(getIndex()), true);
+        ec.addAttr(facet, "description", getDescription(), true);
+
+        return facet;
+    }
+
+    public void set(ManagedFacet other) {
+        uuid     = other.uuid;
+        position = other.position;
+        active   = other.active;
+    }
+
+    @Override 
+    public Facet deepCopy() {
+        ManagedFacet copy = new ManagedFacet();
+        copy.set((DefaultFacet)this);
+        copy.set((ManagedFacet)this);
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ManagedFacetAdapter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,59 @@
+package de.intevation.flys.artifacts.model;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+
+public class ManagedFacetAdapter extends ManagedFacet {
+
+    protected Facet facet;
+
+    public ManagedFacetAdapter() {
+    }
+
+    public ManagedFacetAdapter(Facet facet, String uuid, int pos, int active) {
+        super(
+            facet.getName(),
+            facet.getIndex(),
+            facet.getDescription(),
+            uuid,
+            pos,
+            active);
+
+        this.facet = facet;
+    }
+
+
+    @Override
+    public Node toXML(Document doc) {
+        ElementCreator ec = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element e = (Element) facet.toXML(doc);
+        ec.addAttr(e, "artifact", getArtifact(), true);
+        ec.addAttr(e, "facet", getName(), true);
+        ec.addAttr(e, "pos", String.valueOf(getPosition()), true);
+        ec.addAttr(e, "active", String.valueOf(getActive()), true);
+
+        return e;
+    }
+
+    @Override
+    public Facet deepCopy() {
+        ManagedFacetAdapter copy = new ManagedFacetAdapter();
+        copy.set((DefaultFacet)this);
+        copy.set((ManagedFacet)this);
+        copy.facet = facet.deepCopy();
+        return facet;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/NamedDouble.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,29 @@
+package de.intevation.flys.artifacts.model;
+
+/**
+ * Implementation of a <String,double> pair.
+ */
+public class NamedDouble
+extends      NamedObjectImpl
+{
+    protected double value;
+
+
+    /**
+     * @param name  name for the given value.
+     * @param value value.
+     */
+    public NamedDouble(String name, double value) {
+        super(name);
+        this.value = value;
+    }
+
+
+    /**
+     * Get the value.
+     * @return the value.
+     */
+    public double getValue() {
+        return this.value;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/NamedObject.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,19 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+
+/**
+ * This class represents an object that has a name. The default case would be to
+ * inherit from this class.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public interface NamedObject
+extends          Serializable
+{
+    void setName(String name);
+
+    String getName();
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/NamedObjectImpl.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,28 @@
+package de.intevation.flys.artifacts.model;
+
+public class NamedObjectImpl
+implements   NamedObject
+{
+    /** The name of this object.*/
+    protected String name;
+
+    public NamedObjectImpl() {
+    }
+
+    public NamedObjectImpl(String name) {
+        this.name = name;
+    }
+
+
+    @Override
+    public void setName(String name) {
+        this.name = name;
+    }
+
+
+    @Override
+    public String getName() {
+        return name;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,195 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+public class QRangeTree
+implements   Serializable
+{
+    private static Logger log = Logger.getLogger(QRangeTree.class);
+
+    public static class Node
+    implements          Serializable
+    {
+        Node left;
+        Node right;
+        Node prev;
+        Node next;
+
+        double a;
+        double b;
+        double q;
+
+        public Node() {
+        }
+
+        public Node(double a, double b, double q) {
+            this.a = a;
+            this.b = b;
+            this.q = q;
+        }
+
+        protected final double interpolatePrev(double pos) {
+            /*
+            f(prev.b) = prev.q
+            f(a)      = q
+
+            prev.q = m*prev.b + n
+            q      = m*a      + n <=> n = q - m*a
+
+            q - prev.q = m*(a - prev.b)
+
+            m = (q - prev.q)/(a - prev.b) # a != prev.b
+            */
+
+            if (a == prev.b) {
+                return 0.5*(q + prev.q);
+            }
+            double m = (q - prev.q)/(a - prev.b);
+            double n = q - m*a;
+            return m*pos + n;
+        }
+
+        protected final double interpolateNext(double pos) {
+            /*
+            f(next.a) = next.q
+            f(b)      = q
+
+            next.q = m*next.a + n
+            q      = m*b      + n <=> n = q - m*b
+
+            q - next.q = m*(b - next.a)
+            m = (q - next.q)/(b - next.a) # b != next.a
+            */
+
+            if (b == next.a) {
+                return 0.5*(q + next.q);
+            }
+            double m = (q - next.q)/(b - next.a);
+            double n = q - m*b;
+            return m*pos + n;
+        }
+
+        public double findQ(double pos) {
+
+            Node current = this;
+            for (;;) {
+                if (pos < current.a) {
+                    if (current.left != null) {
+                        current = current.left;
+                        continue;
+                    }
+                    return current.prev != null
+                        ? current.interpolatePrev(pos)
+                        : Double.NaN;
+                }
+                if (pos > current.b) {
+                    if (current.right != null) {
+                        current = current.right;
+                        continue;
+                    }
+                    return current.next != null
+                        ? current.interpolateNext(pos)
+                        : Double.NaN;
+                }
+                return current.q;
+            }
+        }
+    } // class Node
+
+    protected Node root;
+
+    public QRangeTree() {
+    }
+
+    /** wstQRanges need to be sorted by range.a */
+    public QRangeTree(List<Object []> qRanges, int start, int stop) {
+
+        if (stop <= start) {
+            return;
+        }
+
+        Node [] nodes = new Node[stop-start];
+        for (int i = 0; i < nodes.length; ++i) {
+            Object [] qRange = qRanges.get(i + start);
+            Double q = (Double)qRange[1];
+            Double a = (Double)qRange[2];
+            Double b = (Double)qRange[3];
+
+            nodes[i] = new Node(
+                a != null ? a.doubleValue() : -Double.MAX_VALUE,
+                b != null ? b.doubleValue() :  Double.MAX_VALUE,
+                q.doubleValue());
+        }
+
+        root = wireTree(nodes);
+    }
+
+    protected static Node wireTree(Node [] nodes) {
+        for (int i = 0; i < nodes.length; ++i) {
+            Node node = nodes[i];
+            if (i > 0             ) node.prev = nodes[i-1];
+            if (i < nodes.length-1) node.next = nodes[i+1];
+        }
+
+        return buildTree(nodes, 0, nodes.length-1);
+    }
+
+    protected static Node buildTree(Node [] nodes, int lo, int hi) {
+
+        if (lo > hi) {
+            return null;
+        }
+
+        int mid = (lo + hi) >> 1;
+        Node parent = nodes[mid];
+
+        parent.left  = buildTree(nodes, lo, mid-1);
+        parent.right = buildTree(nodes, mid+1, hi);
+
+        return parent;
+    }
+
+    public double findQ(double pos) {
+        return root != null ? root.findQ(pos) : Double.NaN;
+    }
+
+    private static final String name(Object o) {
+        return String.valueOf(System.identityHashCode(o) & 0xffffffffL);
+    }
+
+    public String toGraph() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("subgraph c");
+        sb.append(name(this));
+        sb.append(" {\n");
+        if (root != null) {
+            java.util.Deque<Node> stack = new java.util.ArrayDeque<Node>();
+            stack.push(root);
+            while (!stack.isEmpty()) {
+                Node current = stack.pop();
+                String name = "n" + name(current);
+                sb.append(name);
+                sb.append(" [label=\"");
+                sb.append(current.a).append(", ").append(current.b);
+                sb.append(": ").append(current.q).append("\"]\n");
+                if (current.left != null) {
+                    String leftName = name(current.left);
+                    sb.append(name).append(" -- n").append(leftName).append("\n");
+                    stack.push(current.left);
+                }
+                if (current.right != null) {
+                    String rightName = name(current.right);
+                    sb.append(name).append(" -- n").append(rightName).append("\n");
+                    stack.push(current.right);
+                }
+            }
+        }
+        sb.append("}\n");
+        return sb.toString();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/RangeWithValues.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,41 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class RangeWithValues implements Serializable {
+
+    protected double   lower;
+    protected double   upper;
+    protected double[] values;
+
+
+    public RangeWithValues() {
+    }
+
+
+    public RangeWithValues(double lower, double upper, double[] values) {
+        this.lower  = lower;
+        this.upper  = upper;
+        this.values = values;
+    }
+
+
+    public double getLower() {
+        return lower;
+    }
+
+
+    public double getUpper() {
+        return upper;
+    }
+
+
+    public double[] getValues() {
+        return values;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ReportFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,64 @@
+package de.intevation.flys.artifacts.model;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+
+import org.apache.log4j.Logger;
+
+public class ReportFacet
+extends      DefaultFacet
+implements   FacetTypes
+{
+    private static Logger logger = Logger.getLogger(ReportFacet.class);
+
+    protected ComputeType type;
+    protected String      hash;
+    protected String      stateId;
+
+    public ReportFacet() {
+        this(ComputeType.ADVANCE);
+    }
+
+    public ReportFacet(ComputeType type) {
+        super(0, REPORT, "report");
+        this.type = type;
+    }
+
+
+    public ReportFacet(ComputeType type, String hash, String stateId) {
+        super(0, REPORT, "report");
+        this.type    = type;
+        this.hash    = hash;
+        this.stateId = stateId;
+    }
+
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("get report data");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult cr = (CalculationResult)winfo.compute(
+            context, hash, stateId, type, false);
+
+        return cr.getReport();
+    }
+
+    @Override
+    public Facet deepCopy() {
+        ReportFacet copy = new ReportFacet();
+        copy.set(this);
+        copy.type    = type;
+        copy.hash    = hash;
+        copy.stateId = stateId;
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/RiverFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,71 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.River;
+
+import org.hibernate.Query;
+import org.hibernate.Session;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class RiverFactory {
+
+    /** We don't need to instantiate concrete objects of this class. */
+    private RiverFactory() {
+    }
+
+
+    /**
+     * Returns all rivers that were found in the backend.
+     *
+     * @return all rivers.
+     */
+    public static List<River> getRivers() {
+        Session session = SessionHolder.HOLDER.get();
+        return (List<River>)session
+            .createQuery("from River order by name").list();
+    }
+
+
+    /**
+     * Returns a River object fetched from database based on its id.
+     *
+     * @param river_id The id of the desired river.
+     *
+     * @return the river.
+     */
+    public static River getRiver(int river_id) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createQuery("from River where id=:river_id");
+        query.setParameter("river_id", river_id);
+
+        List<River> rivers = query.list();
+
+        return (rivers != null && rivers.size() > 0) ? rivers.get(0) : null;
+    }
+
+
+    /**
+     * Returns a River object fetched from database based on its name.
+     *
+     * @param river The name of a river.
+     *
+     * @return the River object.
+     */
+    public static River getRiver(String river) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createQuery(
+            "from River where name =:name");
+        query.setParameter("name", river);
+
+        List<River> rivers = query.list();
+
+        return (rivers != null && rivers.size() > 0) ? rivers.get(0) : null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/Segment.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,126 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.Serializable;
+
+import org.apache.log4j.Logger;
+
+import gnu.trove.TDoubleArrayList;
+
+import de.intevation.flys.utils.DoubleUtil;
+
+public class Segment
+implements   Serializable
+{
+    private static Logger logger = Logger.getLogger(Segment.class);
+
+    protected double    from;
+    protected double    to;
+    protected double [] values;
+    protected double [] backup;
+    protected double    referencePoint;
+
+    public Segment() {
+    }
+
+    public Segment(double referencePoint) {
+        this.referencePoint = referencePoint;
+    }
+
+    public Segment(double from, double to, double [] values) {
+        this.from   = from;
+        this.to     = to;
+        this.values = values;
+    }
+
+    public boolean isUp() {
+        return from < to;
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder("Segment: [");
+        sb.append("from: ").append(from).append("; to: ")
+          .append(to)
+          .append("; ref: ").append(referencePoint)
+          .append("; values: (");
+        for (int i = 0; i < values.length; ++i) {
+            if (i > 0) sb.append(", ");
+            sb.append(values[i]);
+        }
+        sb.append(")]");
+        return sb.toString();
+    }
+
+    public void setFrom(double from) {
+        this.from = from;
+    }
+
+    public void backup() {
+        backup = (double [])values.clone();
+    }
+
+    public double getFrom() {
+        return from;
+    }
+
+    public void setTo(double to) {
+        this.to = to;
+    }
+
+    public double getTo() {
+        return to;
+    }
+
+    public void setValues(double [] values) {
+        this.values = values;
+    }
+
+    public double [] getValues() {
+        return values;
+    }
+
+    public void setReferencePoint(double referencePoint) {
+        this.referencePoint = referencePoint;
+    }
+
+    public double getReferencePoint() {
+        return referencePoint;
+    }
+
+    public static List<Segment> parseSegments(String input) {
+
+        ArrayList<Segment> segments = new ArrayList<Segment>();
+
+        TDoubleArrayList vs = new TDoubleArrayList();
+
+        for (String segmentStr: input.split(":")) {
+            String [] parts = segmentStr.split(";");
+            if (parts.length < 3) {
+                logger.warn("invalid segment: '" + segmentStr + "'");
+                continue;
+            }
+            try {
+                double from = Double.parseDouble(parts[0].trim());
+                double to   = Double.parseDouble(parts[1].trim());
+
+                vs.clear();
+
+                for (String valueStr: parts[2].split(",")) {
+                    vs.add(DoubleUtil.round(
+                        Double.parseDouble(valueStr.trim())));
+                }
+
+                double [] values = vs.toNativeArray();
+                segments.add(new Segment(from, to, values));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn("invalid segment: '" + segmentStr + "'");
+            }
+        }
+
+        return segments;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKms.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,12 @@
+package de.intevation.flys.artifacts.model;
+
+public interface WKms
+extends          NamedObject
+{
+    int size();
+
+    double getKm(int index);
+
+    double getW(int index);
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsImpl.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,62 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TDoubleArrayList;
+
+public class WKmsImpl
+extends      NamedObjectImpl
+implements   WKms
+{
+    protected TDoubleArrayList kms;
+    protected TDoubleArrayList ws;
+
+    public WKmsImpl() {
+        super("");
+        kms = new TDoubleArrayList();
+        ws  = new TDoubleArrayList();
+    }
+
+
+    public WKmsImpl(int capacity) {
+        super("");
+        kms = new TDoubleArrayList(capacity);
+        ws  = new TDoubleArrayList(capacity);
+    }
+
+
+    public WKmsImpl(TDoubleArrayList kms, TDoubleArrayList ws) {
+        this(kms, ws, "");
+    }
+
+
+    public WKmsImpl(
+        TDoubleArrayList kms,
+        TDoubleArrayList ws,
+        String           name
+    ) {
+        super(name);
+        this.kms = kms;
+        this.ws  = ws;
+    }
+
+
+    public void add(double km, double w) {
+        kms.add(km);
+        ws .add(w);
+    }
+
+
+    public double getW(int index) {
+        return ws.getQuick(index);
+    }
+
+
+    public double getKm(int index) {
+        return kms.getQuick(index);
+    }
+
+
+    public int size() {
+        return kms.size();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WMSLayerFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,140 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+
+public class WMSLayerFacet
+extends      DefaultFacet
+{
+    protected ComputeType  type;
+    protected List<String> layers;
+    protected String       stateId;
+    protected String       hash;
+    protected String       url;
+    protected String       extent;
+    protected String       srid;
+
+
+    private static final Logger logger = Logger.getLogger(WMSLayerFacet.class);
+
+    public WMSLayerFacet() {
+    }
+
+
+    public WMSLayerFacet(int index, String name, String description) {
+        this(index, name, description, ComputeType.FEED, null, null);
+    }
+
+
+    public WMSLayerFacet(
+        int         index,
+        String      name,
+        String      description,
+        ComputeType type,
+        String      stateId,
+        String      hash
+
+    ) {
+        super(index, name, description);
+        this.layers  = new ArrayList<String>();
+        this.type    = type;
+        this.stateId = stateId;
+        this.hash    = hash;
+    }
+
+
+    public WMSLayerFacet(
+        int         index,
+        String      name,
+        String      description,
+        ComputeType type,
+        String      stateId,
+        String      hash,
+        String      url
+    ) {
+        this(index, name, description, type, stateId, hash);
+        this.url = url;
+    }
+
+
+    public void addLayer(String name) {
+        if (name != null && name.length() > 0) {
+            layers.add(name);
+        }
+    }
+
+
+    public void setExtent(String extent) {
+        if (extent != null) {
+            this.extent = extent;
+        }
+    }
+
+
+    public void setSrid(String srid) {
+        if (srid != null) {
+            this.srid = srid;
+        }
+    }
+
+
+    public Object getData(Artifact artifact, CallContext context) {
+        return null;
+    }
+
+
+    @Override
+    public Node toXML(Document doc) {
+        ElementCreator ec = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element facet = ec.create("facet");
+        ec.addAttr(facet, "description", description, true);
+        ec.addAttr(facet, "index", String.valueOf(index), true);
+        ec.addAttr(facet, "name", name, true);
+        ec.addAttr(facet, "url", url, true);
+        ec.addAttr(facet, "layers", layers.get(0), true);
+        ec.addAttr(facet, "extent", extent != null ? extent : "", true);
+        ec.addAttr(facet, "srid", srid != null ? srid : "", true);
+
+        return facet;
+    }
+
+    @Override
+    public Facet deepCopy() {
+        WMSLayerFacet copy = new WMSLayerFacet();
+        copy.set(this);
+
+        copy.type    = type;
+        copy.layers  = new ArrayList<String>(layers);
+        copy.stateId = stateId;
+        copy.hash    = hash;
+        copy.url     = url;
+        copy.extent  = extent;
+        copy.srid    = srid;
+
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQ.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,191 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TDoubleArrayList;
+
+import java.util.Random;
+
+import org.apache.log4j.Logger;
+
+public class WQ
+extends      NamedObjectImpl
+{
+    private static Logger logger = Logger.getLogger(WQ.class);
+
+    // TODO: s/w/ws/g
+    protected TDoubleArrayList w;
+
+    // TODO: s/q/qs/g
+    protected TDoubleArrayList q;
+
+    public WQ() {
+        this("");
+    }
+
+    public WQ(String name) {
+        w = new TDoubleArrayList();
+        q = new TDoubleArrayList();
+    }
+
+    public WQ(int capacity) {
+        this(capacity, "");
+    }
+
+
+    public WQ(int capacity, String name) {
+        super(name);
+        w = new TDoubleArrayList(capacity);
+        q = new TDoubleArrayList(capacity);
+    }
+
+    public WQ(double [] qs, double [] ws) {
+        this(qs, ws, "");
+    }
+
+    public WQ(double [] qs, double [] ws, String name) {
+        super(name);
+        w = new TDoubleArrayList(ws);
+        q = new TDoubleArrayList(qs);
+    }
+
+    public void add(double w, double q) {
+        this.w.add(w);
+        this.q.add(q);
+    }
+
+    public int size() {
+        return w.size();
+    }
+
+    public double getW(int idx) {
+        return w.getQuick(idx);
+    }
+
+    public double getQ(int idx) {
+        return q.getQuick(idx);
+    }
+
+    public double [] get(int idx) {
+        return get(idx, new double [2]);
+    }
+
+    public double [] get(int idx, double [] dst) {
+        dst[0] = w.getQuick(idx);
+        dst[1] = q.getQuick(idx);
+        return dst;
+    }
+
+    public double [] getWs() {
+        return w.toNativeArray();
+    }
+
+    public double [] getQs() {
+        return q.toNativeArray();
+    }
+
+    public static void removeNaNs(TDoubleArrayList [] arrays) {
+
+        int dest = 0;
+
+        int A = arrays.length;
+        int N = arrays[0].size();
+
+        OUTER: for (int i = 0; i < N; ++i) {
+            for (int j = 0; j < A; ++j) {
+                TDoubleArrayList a = arrays[j];
+                double v = a.getQuick(i);
+                if (Double.isNaN(v)) {
+                    continue OUTER;
+                }
+                a.setQuick(dest, v);
+            }
+            ++dest;
+        }
+
+        if (dest < N) {
+            for (int i = 0; i < A; ++i) {
+                arrays[i].remove(dest, N-dest);
+            }
+        }
+    }
+
+    public void removeNaNs() {
+        removeNaNs(new TDoubleArrayList [] { w, q });
+    }
+
+    public boolean guessWaterIncreasing() {
+        return guessWaterIncreasing(0.05f);
+    }
+
+    public boolean guessWaterIncreasing(float factor) {
+
+        int N = w.size();
+        if (N < 2) return false;
+
+        int samples = (int)(factor*N) + 1;
+
+        int up = 0;
+
+        Random rand = new Random();
+
+        for (int i = 0; i < samples; ++i) {
+            int    pos2 = rand.nextInt(N-1) + 1;
+            if (pos2 == 0) continue;
+            int    pos1 = rand.nextInt(pos2);
+            double w1   = w.getQuick(pos1);
+            double w2   = w.getQuick(pos2);
+            if (w2 > w1) ++up;
+        }
+
+        return up > samples/2;
+    }
+
+    public int [] longestIncreasingWRangeIndices() {
+        return longestIncreasingWRangeIndices(new int[2]);
+    }
+
+    public int [] longestIncreasingWRangeIndices(int [] bounds) {
+
+        int N = size();
+        int start = 0;
+        int stop  = 0;
+
+        double lastW = Double.MAX_VALUE;
+
+        for (int i = 0; i < N; ++i) {
+            double v = w.getQuick(i);
+            if (v <= lastW) {
+                if (stop-start > bounds[1]-bounds[0]) {
+                    bounds[0] = start;
+                    bounds[1] = stop;
+                    if (logger.isDebugEnabled()) {
+                        logger.debug("new range: " +
+                            bounds[0] + " - " + bounds[1] + " (" +
+                            w.getQuick(bounds[0]) + ", " +
+                            w.getQuick(bounds[1]) + ")");
+
+                    }
+                }
+                start = stop = i;
+            }
+            else {
+                stop = i;
+            }
+            lastW = v;
+        }
+
+        if (stop-start > bounds[1]-bounds[0]) {
+            bounds[0] = start;
+            bounds[1] = stop;
+            if (logger.isDebugEnabled()) {
+                logger.debug("new range @end: " +
+                    bounds[0] + " - " + bounds[1] + " (" +
+                    w.getQuick(bounds[0]) + ", " +
+                    w.getQuick(bounds[1]) + ")");
+
+            }
+        }
+
+        return bounds;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQCKms.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,90 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TDoubleArrayList;
+
+
+/**
+ * This class represents a pool of data triples that consists of 'W', 'Q' and
+ * 'KM' data with corrected 'W' values computed by a BackJumpCorrector.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQCKms extends WQKms {
+
+    protected TDoubleArrayList cw;
+
+    public WQCKms() {
+    }
+
+    public WQCKms(WQKms other, double [] cws) {
+        this.w   = other.w;
+        this.q   = other.q;
+        this.kms = other.kms;
+        this.cw  = new TDoubleArrayList(cws);
+    }
+
+
+    public WQCKms(double[] kms, double[] qs, double[] ws, double[] cws) {
+        super(kms, qs, ws);
+
+        this.cw = new TDoubleArrayList(cws);
+    }
+
+    @Override
+    public void removeNaNs() {
+        removeNaNs(new TDoubleArrayList [] { w, q, cw, kms });
+    }
+
+
+    /**
+     * Adds a new row to this data pool with corrected W.
+     *
+     * @param w a W.
+     * @param q a Q.
+     * @param kms a Kms.
+     * @param cw The corrected W.
+     */
+    public void add(double w, double q, double kms, double cw) {
+        add(w, q, kms);
+        this.cw.add(cw);
+    }
+
+
+    /**
+     * This method returns a 4dim array of W, Q,Kms and corrected W.
+     *
+     * @param idx The position of the triple.
+     * @param dst destination array
+     *
+     * @return a 4dim array of [W, Q, Kms, CW] in dst.
+     */
+    @Override
+    public double[] get(int idx, double[] dst) {
+        dst = super.get(idx, dst);
+
+        if (dst.length < 4) {
+            return dst;
+        }
+
+        if (cw != null && cw.size() > idx) {
+            dst[3] = cw.getQuick(idx);
+        }
+
+        return dst;
+    }
+
+    public double getC(int idx) {
+        return cw.getQuick(idx);
+    }
+
+
+    /**
+     * Returns the double array of corrected W values.
+     *
+     * @return the double array of corrected W values.
+     */
+    public double[] getCWs() {
+        return cw.toNativeArray();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQDay.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,67 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TIntArrayList;
+
+/**
+ * This class represents a pool of data triples that consists of 'W', 'Q' and
+ * 'Day' data.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQDay
+extends      WQ
+{
+    protected TIntArrayList days;
+
+    public WQDay() {
+        super("");
+        days = new TIntArrayList();
+    }
+
+    public WQDay(int capacity) {
+        days = new TIntArrayList(capacity);
+    }
+
+    public WQDay(int [] days, double [] ws, double [] qs) {
+        super(qs, ws, "");
+        this.days = new TIntArrayList(days);
+    }
+
+
+    public void add(int day, double w, double q) {
+        super.add(w, q);
+        days.add(day);
+    }
+
+    public int getDay(int idx) {
+        return days.getQuick(idx);
+    }
+
+    @Override
+    public void removeNaNs() {
+
+        int dest = 0;
+        int N = w.size();
+
+        for (int i = 0; i < N; ++i) {
+            double wi = w.getQuick(i);
+            double qi = q.getQuick(i);
+
+            if (Double.isNaN(wi) || Double.isNaN(qi)) {
+                continue;
+            }
+
+            days.setQuick(dest, days.getQuick(i));
+            w.setQuick(dest, wi);
+            q.setQuick(dest, qi);
+            ++dest;
+        }
+
+        if (dest < N) {
+            days.remove(dest, N-dest);
+            w   .remove(dest, N-dest);
+            q   .remove(dest, N-dest);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WQKms.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,108 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TDoubleArrayList;
+
+import org.apache.log4j.Logger;
+
+
+/**
+ * This class represents a pool of data triples that consists of 'W', 'Q' and
+ * 'KM' data.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQKms
+extends      WQ
+implements   WKms
+{
+    private static Logger logger = Logger.getLogger(WQKms.class);
+
+    /** The array that contains the 'KMs' values. */
+    protected TDoubleArrayList kms;
+
+
+    public WQKms() {
+        this("");
+    }
+
+
+    public WQKms(String name) {
+        super(name);
+        this.kms = new TDoubleArrayList();
+    }
+
+
+    public WQKms(int capacity) {
+        this(capacity, "");
+    }
+
+
+    public WQKms(int capacity, String name) {
+        super(name);
+        this.kms = new TDoubleArrayList(capacity);
+    }
+
+    public WQKms(double [] kms, double [] qs, double [] ws) {
+        this(kms, qs, ws, "");
+    }
+
+
+    public WQKms(double [] kms, double [] qs, double [] ws, String name) {
+        super(qs, ws, name);
+        this.kms = new TDoubleArrayList(kms);
+    }
+
+    @Override
+    public void removeNaNs() {
+        removeNaNs(new TDoubleArrayList [] { w, q, kms });
+    }
+
+    /**
+     * Adds a new row to this data pool.
+     *
+     * @param w a W.
+     * @param q a Q.
+     * @param kms a Kms.
+     */
+    public void add(double w, double q, double km) {
+        super.add(w, q);
+        kms.add(km);
+    }
+
+    /**
+     * This method returns a triple of W, Q and Kms in a single 3dim array.
+     *
+     * @param idx The position of the triple.
+     * @param dst destination array
+     *
+     * @return a triple of [W, Q, Kms] in dst.
+     */
+    @Override
+    public double[] get(int idx, double [] dst) {
+        dst[0] = w  .getQuick(idx);
+        dst[1] = q  .getQuick(idx);
+        dst[2] = kms.getQuick(idx);
+        return dst;
+    }
+
+    @Override
+    public double getKm(int idx) {
+        return kms.getQuick(idx);
+    }
+
+    public double[] getKms() {
+        return kms.toNativeArray();
+    }
+
+    /**
+     * Returns a string that consist of the first and last kilometer.
+     *
+     * @return a string that consist of the first and last kilometer.
+     */
+    public String toString() {
+        double from = getKm(0);
+        double to   = getKm(size()-1);
+        return from + " - " + to;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WSPLGENCalculation.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,81 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallMeta;
+
+
+public class WSPLGENCalculation extends Calculation {
+
+    private static final Logger log = Logger.getLogger(WSPLGENCalculation.class);
+
+    protected Map<Integer, String> errors;
+    protected Map<Integer, String> warnings;
+
+
+    public WSPLGENCalculation() {
+        errors   = new HashMap<Integer, String>();
+        warnings = new HashMap<Integer, String>();
+    }
+
+
+    public void addError(Integer key, String msg) {
+        log.debug("New error: (" + key + ") " + msg);
+        errors.put(key, msg);
+    }
+
+
+    public void addWarning(Integer key, String msg) {
+        log.debug("New warning: (" + key + ") " + msg);
+        warnings.put(key, msg);
+    }
+
+
+    public int numErrors() {
+        return errors.size();
+    }
+
+
+    public int numWarnings() {
+        return warnings.size();
+    }
+
+
+    public void toXML(Document document, CallMeta meta) {
+        Element root = document.createElement("problems");
+
+        if (numErrors() > 0) {
+            Set<Map.Entry<Integer, String>> entrySet = errors.entrySet();
+
+            for (Map.Entry<Integer, String> entry: entrySet) {
+                Element problem = document.createElement("problem");
+                problem.setAttribute("error", String.valueOf(entry.getKey()));
+                problem.setTextContent(entry.getValue());
+
+                root.appendChild(problem);
+            }
+        }
+
+        if (numWarnings() > 0) {
+            Set<Map.Entry<Integer, String>> entrySet = warnings.entrySet();
+
+            for (Map.Entry<Integer, String> entry: entrySet) {
+                Element problem = document.createElement("problem");
+                problem.setAttribute("error", String.valueOf(entry.getKey()));
+                problem.setTextContent(entry.getValue());
+
+                root.appendChild(problem);
+            }
+        }
+
+        document.appendChild(root);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WSPLGENJob.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,463 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.IOException;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+
+public class WSPLGENJob {
+
+    public static final String GEL_SPERRE   = "SPERRE";
+    public static final String GEL_NOSPERRE = "NOSPERRE";
+
+
+    protected FLYSArtifact artifact;
+
+    protected CallContext callContext;
+
+    protected WSPLGENCalculation calculation;
+
+    protected File workingDir;
+
+    protected String dgm;
+    protected String pro;
+    protected String wsp;
+    protected String wspTag;
+    protected String axis;
+    protected String area;
+    protected String gel;
+    protected String outFile;
+
+    protected List<String> lin;
+
+    protected int out;
+
+    protected double start;
+    protected double end;
+    protected double from;
+    protected double to;
+    protected double diff;
+    protected double dist;
+
+
+
+    public WSPLGENJob(
+        FLYSArtifact       flys,
+        File               workingDir,
+        CallContext        context,
+        WSPLGENCalculation calculation)
+    {
+        this.artifact    = flys;
+        this.workingDir  = workingDir;
+        this.callContext = context;
+        this.calculation = calculation;
+
+        out   = -1;
+        start = Double.NaN;
+        end   = Double.NaN;
+        from  = Double.NaN;
+        to    = Double.NaN;
+        diff  = Double.NaN;
+        dist  = Double.NaN;
+        lin   = new ArrayList<String>(2);
+    }
+
+
+    public File getWorkingDir() {
+        return workingDir;
+    }
+
+
+    public FLYSArtifact getArtifact() {
+        return artifact;
+    }
+
+
+    public WSPLGENCalculation getCalculation() {
+        return calculation;
+    }
+
+
+    public CallContext getCallContext() {
+        return callContext;
+    }
+
+
+    public void setWsp(String wsp) {
+        this.wsp = wsp;
+    }
+
+
+    public String getWsp() {
+        return wsp;
+    }
+
+
+    public void setWspTag(String wspTag) {
+        this.wspTag = wspTag;
+    }
+
+
+    public String getWspTag() {
+        return wspTag;
+    }
+
+
+    public void addLin(String lin) {
+        this.lin.add(lin);
+    }
+
+
+    public List<String> getLin() {
+        return lin;
+    }
+
+
+    public void setAxis(String axis) {
+        this.axis = axis;
+    }
+
+
+    public String getAxis() {
+        return axis;
+    }
+
+
+    public void setArea(String area) {
+        this.area = area;
+    }
+
+
+    public String getArea() {
+        return area;
+    }
+
+
+    public void setOut(int out) {
+        this.out = out;
+    }
+
+
+    public int getOut() {
+        return out;
+    }
+
+
+    public void setOutFile(String outFile) {
+        this.outFile = outFile;
+    }
+
+
+    public String getOutFile() {
+        return outFile;
+    }
+
+
+    public void setStart(double start) {
+        this.start = start;
+    }
+
+
+    public double getStart() {
+        return start;
+    }
+
+
+    public void setEnd(double end) {
+        this.end = end;
+    }
+
+
+    public double getEnd() {
+        return end;
+    }
+
+
+    public void setPro(String pro) {
+        this.pro = pro;
+    }
+
+
+    public String getPro() {
+        return pro;
+    }
+
+
+    public void setDgm(String dgm) {
+        this.dgm = dgm;
+    }
+
+
+    public String getDgm() {
+        return dgm;
+    }
+
+
+    public void setFrom(double from) {
+        this.from = from;
+    }
+
+
+    public double getFrom() {
+        return from;
+    }
+
+
+    public void setTo(double to) {
+        this.to = to;
+    }
+
+
+    public double getTo() {
+        return to;
+    }
+
+
+    public void setDiff(double diff) {
+        this.diff = diff;
+    }
+
+
+    public double getDiff() {
+        return diff;
+    }
+
+
+    public void setDist(double dist) {
+        this.dist = dist;
+    }
+
+
+    public double getDist() {
+        return dist;
+    }
+
+
+    public void setGel(String gel) {
+        if (gel == null || gel.length() == 0) {
+            return;
+        }
+
+        if (gel.equals(GEL_SPERRE) || gel.equals(GEL_NOSPERRE)) {
+            this.gel = gel;
+        }
+    }
+
+
+    public String getGel() {
+        return gel;
+    }
+
+
+    public void toFile(File file)
+    throws IOException, IllegalArgumentException
+    {
+        PrintWriter writer = null;
+
+        try {
+            writer =
+                new PrintWriter(
+                    new OutputStreamWriter(
+                        new FileOutputStream(file)));
+
+            write(writer);
+        }
+        finally {
+            if (writer != null) {
+                writer.flush();
+                writer.close();
+            }
+        }
+    }
+
+
+    protected void write(PrintWriter writer)
+    throws IOException, IllegalArgumentException
+    {
+        writeWsp(writer);    // required
+        writeWspTag(writer); // required
+        writeLin(writer);
+        writeAxis(writer);
+        writeArea(writer);
+        writeOut(writer);
+        writeOutFile(writer);
+        writeRange(writer);
+        writeDelta(writer);
+        writeGel(writer);
+        writeDist(writer);
+        writePro(writer);
+        writeDgm(writer);    // required
+    }
+
+
+    protected void writeWsp(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        String wsp = getWsp();
+
+        if (wsp != null && wsp.length() > 0) {
+            writer.println("-WSP=\"" + wsp + "\"");
+            return;
+        }
+
+        throw new IllegalArgumentException("Required WSP missing!");
+    }
+
+    protected void writeWspTag(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        String wspTag = getWspTag();
+
+        if (wspTag != null && wspTag.length() > 0) {
+            writer.println("-WSPTAG=\"" + wspTag + "\"");
+            return;
+        }
+
+        throw new IllegalArgumentException("Required WSPTAG missing!");
+    }
+
+    protected void writeLin(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        List<String> lins = getLin();
+
+        if (lins != null && !lins.isEmpty()) {
+            for (String lin: lins) {
+                writer.println("-LIN=\"" + lin + "\"");
+            }
+        }
+    }
+
+    protected void writeAxis(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        String axis = getAxis();
+
+        if (axis != null && axis.length() > 0) {
+            writer.println("-ACHSE=\"" + axis + "\"");
+        }
+    }
+
+    protected void writeGel(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        if (area != null && area.length() > 0) {
+            writer.println("-GEL=" + getGel());
+        }
+    }
+
+    protected void writeArea(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        String area = getArea();
+
+        if (area != null && area.length() > 0) {
+            writer.println("-GEBIET=\"" + area + "\"");
+        }
+    }
+
+
+    protected void writeOut(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        int out = getOut();
+
+        if (out >= 0) {
+            writer.println("-OUTPUT=" + String.valueOf(out));
+        }
+    }
+
+    protected void writeOutFile(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        String outFile = getOutFile();
+
+        if (outFile != null && outFile.length() > 0) {
+            writer.println("-AUSGABE=\""+ outFile + "\"");
+        }
+    }
+
+    protected void writeRange(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        StringBuilder sb = new StringBuilder("-STRECKE=");
+
+        double start = getStart();
+        double end   = getEnd();
+
+        if (Double.isNaN(start) && Double.isNaN(end)) {
+            return;
+        }
+
+        if (! Double.isNaN(getStart())) {
+            sb.append(getStart());
+        }
+
+        sb.append(",");
+
+        if (! Double.isNaN(getEnd())) {
+            sb.append(getEnd());
+        }
+
+        writer.println(sb.toString());
+    }
+
+    protected void writeDelta(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        StringBuilder sb = new StringBuilder("-DELTA=");
+        if (! Double.isNaN(from)) {
+            sb.append(from);
+        }
+
+        sb.append(",");
+
+        if (! Double.isNaN(to)) {
+            sb.append(to);
+        }
+
+        sb.append(",");
+
+        if (! Double.isNaN(diff)) {
+            sb.append(diff);
+        }
+
+        writer.println(sb.toString());
+    }
+
+    protected void writeDist(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        if (! Double.isNaN(getDist())) {
+            writer.println("-DIST=" + String.valueOf(getDist()));
+        }
+    }
+
+    protected void writePro(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        if (pro != null && pro.length() > 0) {
+            writer.println("-PRO=\"" + getPro() + "\"");
+        }
+    }
+
+    protected void writeDgm(PrintWriter writer)
+    throws IllegalArgumentException
+    {
+        if (dgm != null && dgm.length() > 0) {
+            writer.println("-DGM=\"" + getDgm() + "\"");
+            return;
+        }
+
+        throw new IllegalArgumentException("Required DGM missing!");
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WSPLGENReportFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,56 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+
+/**
+ * This facet is used to provide WSPLGEN reports <b>only</b>.
+ */
+public class WSPLGENReportFacet extends ReportFacet {
+
+    private static Logger logger = Logger.getLogger(WSPLGENReportFacet.class);
+
+
+    protected CalculationResult result;
+
+
+    public WSPLGENReportFacet() {
+    }
+
+
+    public WSPLGENReportFacet(
+        ComputeType       type,
+        String            hash,
+        String            stateId,
+        CalculationResult result
+    ) {
+        super(type, hash, stateId);
+        this.result = result;
+    }
+
+
+    @Override
+    public Object getData(Artifact artifact, CallContext context) {
+        return result.getReport();
+    }
+
+
+    @Override
+    public Facet deepCopy() {
+        WSPLGENReportFacet copy = new WSPLGENReportFacet();
+        copy.set(this);
+        copy.type    = type;
+        copy.hash    = hash;
+        copy.stateId = stateId;
+        copy.result  = result;
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WaterlevelFacet.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,78 @@
+package de.intevation.flys.artifacts.model;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.DefaultFacet;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+public class WaterlevelFacet extends DefaultFacet {
+
+    private static Logger logger = Logger.getLogger(WaterlevelFacet.class);
+
+    protected ComputeType type;
+    protected String      stateID;
+    protected String      hash;
+
+
+    public WaterlevelFacet(int index, String name, String description) {
+        this(index, name, description, ComputeType.ADVANCE, null, null);
+    }
+
+
+    public WaterlevelFacet() {
+    }
+
+
+    public WaterlevelFacet(
+        int         index,
+        String      name,
+        String      description,
+        ComputeType type,
+        String      stateID,
+        String      hash
+
+    ) {
+        super(index, name, description);
+        this.type    = type;
+        this.stateID = stateID;
+        this.hash    = hash;
+    }
+
+
+    /**
+     * Get waterlevel data.
+     * @return a WQKms at given index.
+     */
+    public Object getData(Artifact artifact, CallContext context) {
+        logger.debug("Get data for waterlevels at index: " + index);
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = (CalculationResult)
+            winfo.compute(context, hash, stateID, type, false);
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        return wqkms[index];
+    }
+
+
+    /** Copy deeply. */
+    @Override
+    public Facet deepCopy() {
+        WaterlevelFacet copy = new WaterlevelFacet();
+        copy.set(this);
+        copy.type    = type;
+        copy.stateID = stateID;
+        copy.hash    = hash;
+        return copy;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,48 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Wst;
+
+import org.hibernate.Query;
+import org.hibernate.Session;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WstFactory {
+
+    public static final int DEFAULT_KIND = 0;
+
+    /** We don't need to instantiate concrete objects of this class. */
+    private WstFactory() {
+    }
+
+
+    /**
+     * Returns the Wst object for a given river.
+     *
+     * @param river The river.
+     *
+     * @return the Wst of <i>river</i>.
+     */
+    public static Wst getWst(River river) {
+        return getWst(river, DEFAULT_KIND);
+    }
+
+    public static Wst getWst(River river, int kind) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createQuery(
+            "from Wst where river=:river and kind = :kind");
+        query.setParameter("river", river);
+        query.setInteger("kind", kind);
+
+        List<Wst> wsts = query.list();
+
+        return wsts.isEmpty() ? null : wsts.get(0);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstLine.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,88 @@
+package de.intevation.flys.artifacts.model;
+
+import gnu.trove.TDoubleArrayList;
+
+
+/**
+ * A model class that is used to store a line of a WST.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WstLine {
+
+    /** The kilometer value of the line.*/
+    protected double km;
+
+    /** The W values.*/
+    protected TDoubleArrayList ws;
+
+    /** The Q values.*/
+    protected TDoubleArrayList qs;
+
+
+    /**
+     * A constructor that builds a new WstLine for a specific kilometer.
+     *
+     * @param km The kilometer.
+     */
+    public WstLine(double km) {
+        this.km = km;
+        this.ws = new TDoubleArrayList();
+        this.qs = new TDoubleArrayList();
+    }
+
+
+    /**
+     * Adds a pair of W/Q to this line.
+     *
+     * @param w The W value.
+     * @param q The Q value.
+     */
+    public void add(double w, double q) {
+        ws.add(w);
+        qs.add(q);
+    }
+
+
+    /**
+     * Returns the kilometer of this line.
+     *
+     * @return the kilomter of this line.
+     */
+    public double getKm() {
+        return km;
+    }
+
+
+    /**
+     * Returns the W value at index <i>idx</i> of this line.
+     *
+     * @param idx The position of the desired W value.
+     *
+     * @return the W at position <i>idx</i>.
+     */
+    public double getW(int idx) {
+        return ws.size() > idx ? ws.get(idx) : -1d;
+    }
+
+
+    /**
+     * Returns the Q values of this line.
+     *
+     * @return the Q values of this line.
+     */
+    public double[] getQs() {
+        return qs.toNativeArray();
+    }
+
+
+    /**
+     * Returns the number of columns this line consists of.
+     *
+     * @return the columns this line consists of.
+     */
+    public int getSize() {
+        return qs.size();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTable.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,647 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+import de.intevation.flys.artifacts.math.Linear;
+import de.intevation.flys.artifacts.math.Function;
+
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Collections;
+
+import org.apache.log4j.Logger;
+
+import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
+
+import org.apache.commons.math.analysis.polynomials.PolynomialSplineFunction;
+
+import org.apache.commons.math.ArgumentOutsideDomainException;
+
+import org.apache.commons.math.exception.MathIllegalArgumentException;
+
+public class WstValueTable
+implements   Serializable
+{
+    private static Logger log = Logger.getLogger(WstValueTable.class);
+
+    public static final int DEFAULT_Q_STEPS = 500;
+
+    public static final class Column
+    implements                Serializable
+    {
+        protected String name;
+
+        protected QRangeTree qRangeTree;
+
+        public Column() {
+        }
+
+        public Column(String name) {
+            this.name = name;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public QRangeTree getQRangeTree() {
+            return qRangeTree;
+        }
+
+        public void setQRangeTree(QRangeTree qRangeTree) {
+            this.qRangeTree = qRangeTree;
+        }
+    } // class Column
+
+    public static final class QPosition {
+
+        protected int    index;
+        protected double weight;
+
+        public QPosition() {
+        }
+
+        public QPosition(int index, double weight) {
+            this.index  = index;
+            this.weight = weight;
+        }
+
+        public QPosition set(int index, double weight) {
+            this.index  = index;
+            this.weight = weight;
+            return this;
+        }
+
+    } // class Position
+
+    public static final class Row
+    implements                Serializable, Comparable<Row>
+    {
+        double    km;
+        double [] ws;
+
+        public Row() {
+        }
+
+        public Row(double km) {
+            this.km = km;
+        }
+
+        public Row(double km, double [] ws) {
+            this(km);
+            this.ws = ws;
+        }
+
+        public int compareTo(Row other) {
+            double d = km - other.km;
+            if (d < -0.0001) return -1;
+            if (d >  0.0001) return +1;
+            return 0;
+        }
+
+        public void interpolateW(
+            Row           other,
+            double        km,
+            double []     iqs,
+            double []     ows,
+            WstValueTable table,
+            Calculation   errors
+        ) {
+            double kmWeight = Linear.factor(km, this.km, other.km);
+
+            QPosition qPosition = new QPosition();
+
+            for (int i = 0; i < iqs.length; ++i) {
+                if (table.getQPosition(km, iqs[i], qPosition) != null) {
+                    double wt =       getW(qPosition);
+                    double wo = other.getW(qPosition);
+                    if (Double.isNaN(wt) || Double.isNaN(wo)) {
+                        if (errors != null) {
+                            // TODO: I18N
+                            errors.addProblem(
+                                km, "cannot find w for q = " + iqs[i]);
+                        }
+                        ows[i] = Double.NaN;
+                    }
+                    else {
+                        ows[i] = Linear.weight(kmWeight, wt, wo);
+                    }
+                }
+                else {
+                    if (errors != null) {
+                        // TODO: I18N
+                        errors.addProblem(km, "cannot find q = " + iqs[i]);
+                    }
+                    ows[i] = Double.NaN;
+                }
+            }
+        }
+
+        public double [][] interpolateWQ(
+            Row           other,
+            double        km,
+            int           steps,
+            WstValueTable table,
+            Calculation   errors
+        ) {
+            int W = Math.min(ws.length, other.ws.length);
+
+            if (W < 1) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem("no ws found");
+                }
+                return new double[2][0];
+            }
+
+            double factor = Linear.factor(km, this.km, other.km);
+
+            double [] splineQ = new double[W];
+            double [] splineW = new double[W];
+
+            double minQ =  Double.MAX_VALUE;
+            double maxQ = -Double.MAX_VALUE;
+
+            for (int i = 0; i < W; ++i) {
+                double wws = Linear.weight(factor, ws[i], other.ws[i]);
+                double wqs = Linear.weight(
+                    factor,
+                    table.getQIndex(i, km),
+                    table.getQIndex(i, other.km));
+
+                if (Double.isNaN(wws) || Double.isNaN(wqs)) {
+                    if (errors != null) {
+                        // TODO: I18N
+                        errors.addProblem(km, "cannot find w or q");
+                    }
+                }
+                else {
+                    if (wqs < minQ) minQ = wqs;
+                    if (wqs > maxQ) maxQ = wqs;
+                }
+
+                splineW[i] = wws;
+                splineQ[i] = wqs;
+            }
+
+            double stepWidth = (maxQ - minQ)/steps;
+
+            SplineInterpolator interpolator = new SplineInterpolator();
+            PolynomialSplineFunction spline;
+
+            try {
+                spline = interpolator.interpolate(splineQ, splineW);
+            }
+            catch (MathIllegalArgumentException miae) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "spline creation failed");
+                }
+                log.error("spline creation failed");
+                return new double[2][0];
+            }
+
+            double [] outWs = new double[steps];
+            double [] outQs = new double[steps];
+
+            Arrays.fill(outWs, Double.NaN);
+            Arrays.fill(outQs, Double.NaN);
+
+            try {
+                double q = minQ;
+                for (int i = 0; i < outWs.length; ++i, q += stepWidth) {
+                    outWs[i] = spline.value(outQs[i] = q);
+                }
+            }
+            catch (ArgumentOutsideDomainException aode) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "spline interpolation failed");
+                }
+                log.error("spline interpolation failed", aode);
+            }
+
+            return new double [][] { outWs, outQs };
+        }
+
+        public double [][] interpolateWQ(
+            int           steps,
+            WstValueTable table,
+            Calculation   errors
+        ) {
+            int W = ws.length;
+
+            if (W < 1) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "no ws found");
+                }
+                return new double[2][0];
+            }
+
+            double [] splineQ = new double[W];
+
+            double minQ =  Double.MAX_VALUE;
+            double maxQ = -Double.MAX_VALUE;
+
+            for (int i = 0; i < W; ++i) {
+                double sq = table.getQIndex(i, km);
+                if (Double.isNaN(sq)) {
+                    if (errors != null) {
+                        // TODO: I18N
+                        errors.addProblem(
+                            km, "no q found in " + (i+1) + " column");
+                    }
+                }
+                else {
+                    if (sq < minQ) minQ = sq;
+                    if (sq > maxQ) maxQ = sq;
+                }
+                splineQ[i] = sq;
+            }
+
+            double stepWidth = (maxQ - minQ)/steps;
+
+            SplineInterpolator interpolator = new SplineInterpolator();
+
+            PolynomialSplineFunction spline;
+
+            try {
+                spline = interpolator.interpolate(splineQ, ws);
+            }
+            catch (MathIllegalArgumentException miae) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "spline creation failed");
+                }
+                log.error("spline creation failed");
+                return new double[2][0];
+            }
+
+            double [] outWs = new double[steps];
+            double [] outQs = new double[steps];
+
+            Arrays.fill(outWs, Double.NaN);
+            Arrays.fill(outQs, Double.NaN);
+
+            try {
+                double q = minQ;
+                for (int i = 0; i < outWs.length; ++i, q += stepWidth) {
+                    outWs[i] = spline.value(outQs[i] = q);
+                }
+            }
+            catch (ArgumentOutsideDomainException aode) {
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "spline interpolation failed");
+                }
+                log.error("spline interpolation failed.", aode);
+            }
+
+            return new double [][] { outWs, outQs };
+        }
+
+
+        public double getW(QPosition qPosition) {
+            int    index  = qPosition.index;
+            double weight = qPosition.weight;
+
+            return weight == 1.0
+                ? ws[index]
+                : Linear.weight(weight, ws[index-1], ws[index]);
+        }
+
+        public double getW(
+            Row       other,
+            double    km,
+            QPosition qPosition
+        ) {
+            double kmWeight = Linear.factor(km, this.km, other.km);
+
+            int    index  = qPosition.index;
+            double weight = qPosition.weight;
+
+            double tw, ow;
+
+            if (weight == 1.0) {
+                tw = ws[index];
+                ow = other.ws[index];
+            }
+            else {
+                tw = Linear.weight(weight, ws[index-1], ws[index]);
+                ow = Linear.weight(weight, other.ws[index-1], other.ws[index]);
+            }
+
+            return Linear.weight(kmWeight, tw, ow);
+        }
+    } // class Row
+
+    protected List<Row> rows;
+
+    protected Column [] columns;
+
+    public WstValueTable() {
+        rows = new ArrayList<Row>();
+    }
+
+    public WstValueTable(Column [] columns) {
+        this();
+        this.columns = columns;
+    }
+
+    public WstValueTable(Column [] columns, List<Row> rows) {
+        this.columns = columns;
+        this.rows    = rows;
+    }
+
+    public void sortRows() {
+        Collections.sort(rows);
+    }
+
+    public double [] interpolateW(double km, double [] qs, double [] ws) {
+        return interpolateW(km, qs, ws, null);
+    }
+
+
+    /**
+     * @param ws (output parameter), gets returned.
+     * @return output parameter ws.
+     */
+    public double [] interpolateW(
+        double      km,
+        double []   qs,
+        double []   ws,
+        Calculation errors
+    ) {
+        int rowIndex = Collections.binarySearch(rows, new Row(km));
+
+        QPosition qPosition = new QPosition();
+
+        if (rowIndex >= 0) { // direct row match
+            Row row = rows.get(rowIndex);
+            for (int i = 0; i < qs.length; ++i) {
+                if (getQPosition(km, qs[i], qPosition) == null) {
+                    if (errors != null) {
+                        // TODO: I18N
+                        errors.addProblem(km, "cannot find q = " + qs[i]);
+                    }
+                    ws[i] = Double.NaN;
+                }
+                else {
+                    if (Double.isNaN(ws[i] = row.getW(qPosition))
+                    && errors != null) {
+                        // TODO: I18N
+                        errors.addProblem(
+                            km, "cannot find w for q = " + qs[i]);
+                    }
+                }
+            }
+        }
+        else { // needs bilinear interpolation
+            rowIndex = -rowIndex -1;
+
+            if (rowIndex < 1 || rowIndex >= rows.size()) {
+                // do not extrapolate
+                Arrays.fill(ws, Double.NaN);
+                if (errors != null) {
+                    // TODO: I18N
+                    errors.addProblem(km, "km not found");
+                }
+            }
+            else {
+                Row r1 = rows.get(rowIndex-1);
+                Row r2 = rows.get(rowIndex);
+                r1.interpolateW(r2, km, qs, ws, this, errors);
+            }
+        }
+
+        return ws;
+    }
+
+    public double [][] interpolateWQ(double km) {
+        return interpolateWQ(km, null);
+    }
+
+    public double [][] interpolateWQ(double km, Calculation errors) {
+        return interpolateWQ(km, DEFAULT_Q_STEPS, errors);
+    }
+
+    public double [][] interpolateWQ(double km, int steps, Calculation errors) {
+
+        int rowIndex = Collections.binarySearch(rows, new Row(km));
+
+        if (rowIndex >= 0) { // direct row match
+            Row row = rows.get(rowIndex);
+            return row.interpolateWQ(steps, this, errors);
+        }
+
+        rowIndex = -rowIndex -1;
+
+        if (rowIndex < 1 || rowIndex >= rows.size()) {
+            // do not extrapolate
+            if (errors != null) {
+                // TODO: I18N
+                errors.addProblem(km, "km not found");
+            }
+            return new double[2][0];
+        }
+
+        Row r1 = rows.get(rowIndex-1);
+        Row r2 = rows.get(rowIndex);
+
+        return r1.interpolateWQ(r2, km, steps, this, errors);
+    }
+
+    public boolean interpolate(
+        double    km,
+        double [] out,
+        QPosition qPosition,
+        Function  qFunction
+    ) {
+        int R1 = rows.size()-1;
+
+        out[1] = qFunction.value(getQ(qPosition, km));
+
+        if (Double.isNaN(out[1])) {
+            return false;
+        }
+
+        QPosition nPosition = new QPosition();
+        if (getQPosition(km, out[1], nPosition) == null) {
+            return false;
+        }
+
+        int rowIndex = Collections.binarySearch(rows, new Row(km));
+
+        if (rowIndex >= 0) {
+            // direct row match
+            out[0] = rows.get(rowIndex).getW(nPosition);
+            return !Double.isNaN(out[0]);
+        }
+
+        rowIndex = -rowIndex -1;
+
+        if (rowIndex < 1 || rowIndex >= R1) {
+            // do not extrapolate
+            return false;
+        }
+
+        Row r1 = rows.get(rowIndex-1);
+        Row r2 = rows.get(rowIndex);
+        out[0] = r1.getW(r2, km, nPosition);
+
+        return !Double.isNaN(out[0]);
+    }
+
+
+    /**
+     * Look up interpolation of a Q at given positions.
+     *
+     * @param q           the non-interpolated Q value.
+     * @param referenceKm the reference km (e.g. gauge position).
+     * @param kms         positions for which to interpolate.
+     * @param ws          (output) resulting interpolated ws.
+     * @param qs          (output) resulting interpolated qs.
+     * @param errors      calculation object to store errors.
+     */
+    public QPosition interpolate(
+        double      q,
+        double      referenceKm,
+        double []   kms,
+        double []   ws,
+        double []   qs,
+        Calculation errors
+    ) {
+        return interpolate(
+            q, referenceKm, kms, ws, qs, 0, kms.length, errors);
+    }
+
+    public QPosition interpolate(
+        double      q,
+        double      referenceKm,
+        double []   kms,
+        double []   ws,
+        double []   qs,
+        int         startIndex,
+        int         length,
+        Calculation errors
+    ) {
+        QPosition qPosition = getQPosition(referenceKm, q);
+
+        if (qPosition == null) {
+            // we cannot locate q at km
+            Arrays.fill(ws, Double.NaN);
+            Arrays.fill(qs, Double.NaN);
+            if (errors != null) {
+                errors.addProblem(referenceKm, "cannot find q");
+            }
+            return null;
+        }
+
+        Row kmKey = new Row();
+
+        int R1 = rows.size()-1;
+
+        for (int i = startIndex, end = startIndex+length; i < end; ++i) {
+
+            if (Double.isNaN(qs[i] = getQ(qPosition, kms[i]))) {
+                if (errors != null) {
+                    errors.addProblem(kms[i], "cannot find q");
+                }
+                ws[i] = Double.NaN;
+                continue;
+            }
+
+            kmKey.km = kms[i];
+            int rowIndex = Collections.binarySearch(rows, kmKey);
+
+            if (rowIndex >= 0) {
+                // direct row match
+                if (Double.isNaN(ws[i] = rows.get(rowIndex).getW(qPosition))
+                && errors != null) {
+                    errors.addProblem(kms[i], "cannot find w");
+                }
+                continue;
+            }
+
+            rowIndex = -rowIndex -1;
+
+            if (rowIndex < 1 || rowIndex >= R1) {
+                // do not extrapolate
+                if (errors != null) {
+                    errors.addProblem(kms[i], "cannot find km");
+                }
+                ws[i] =  Double.NaN;
+                continue;
+            }
+            Row r1 = rows.get(rowIndex-1);
+            Row r2 = rows.get(rowIndex);
+
+            if (Double.isNaN(ws[i] = r1.getW(r2, kms[i], qPosition))
+            && errors != null) {
+                errors.addProblem(kms[i], "cannot find w");
+            }
+        }
+
+        return qPosition;
+    }
+
+    public QPosition getQPosition(double km, double q) {
+        return getQPosition(km, q, new QPosition());
+    }
+
+    public QPosition getQPosition(double km, double q, QPosition qPosition) {
+
+        if (columns.length == 0) {
+            return null;
+        }
+
+        double qLast = columns[0].getQRangeTree().findQ(km);
+
+        if (Math.abs(qLast - q) < 0.00001) {
+            return qPosition.set(0, 1d);
+        }
+
+        for (int i = 1; i < columns.length; ++i) {
+            double qCurrent = columns[i].getQRangeTree().findQ(km);
+            if (Math.abs(qCurrent - q) < 0.00001) {
+                return qPosition.set(i, 1d);
+            }
+
+            double qMin, qMax;
+            if (qLast < qCurrent) { qMin = qLast; qMax = qCurrent; }
+            else                  { qMin = qCurrent; qMax = qLast; }
+
+            if (q > qMin && q < qMax) {
+                double weight = Linear.factor(q, qLast, qCurrent);
+                return qPosition.set(i, weight);
+            }
+            qLast = qCurrent;
+        }
+
+        return null;
+    }
+
+    public double getQIndex(int index, double km) {
+        return columns[index].getQRangeTree().findQ(km);
+    }
+
+    public double getQ(QPosition qPosition, double km) {
+        int    index  = qPosition.index;
+        double weight = qPosition.weight;
+
+        if (weight == 1d) {
+            return columns[index].getQRangeTree().findQ(km);
+        }
+        double q1 = columns[index-1].getQRangeTree().findQ(km);
+        double q2 = columns[index  ].getQRangeTree().findQ(km);
+        return Linear.weight(weight, q1, q2);
+    }
+
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTableCacheKey.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,30 @@
+package de.intevation.flys.artifacts.model;
+
+import java.io.Serializable;
+
+public final class WstValueTableCacheKey
+implements         Serializable
+{
+    public static final String CACHE_NAME = "wst-value-table";
+
+    private int riverId;
+    private int kind;
+
+    public WstValueTableCacheKey(int riverId, int kind) {
+        this.riverId = riverId;
+        this.kind    = kind;
+    }
+
+    public int hashCode() {
+        return (riverId << 8) | kind;
+    }
+
+    public boolean equals(Object other) {
+        if (!(other instanceof WstValueTableCacheKey)) {
+            return false;
+        }
+        WstValueTableCacheKey o = (WstValueTableCacheKey)other;
+        return riverId == o.riverId && kind == o.kind;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,244 @@
+package de.intevation.flys.artifacts.model;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.Element;
+
+import de.intevation.flys.artifacts.cache.CacheFactory;
+
+import de.intevation.flys.backend.SessionHolder;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Wst;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+import org.hibernate.SQLQuery;
+
+import org.hibernate.type.StandardBasicTypes;
+
+public class WstValueTableFactory
+{
+    private static Logger log = Logger.getLogger(WstValueTableFactory.class);
+
+    public static final int DEFAULT_KIND = 0;
+
+    // TODO: put this into a property file
+
+    public static final String HQL_WST =
+        "from Wst where river=:river and kind=:kind";
+
+    public static final String SQL_SELECT_NAMES_POS =
+        "SELECT position, name FROM wst_columns " +
+        "WHERE wst_id = :wst_id ORDER BY position";
+
+    public static final String SQL_SELECT_QS =
+        "SELECT column_pos, q, a, b FROM wst_q_values " +
+        "WHERE wst_id = :wst_id";
+
+    public static final String SQL_SELECT_WS =
+        "SELECT km, w, column_pos FROM wst_w_values " +
+        "WHERE wst_id = :wst_id";
+
+    private WstValueTableFactory() {
+    }
+
+    public static WstValueTable getTable(River river) {
+        return getTable(river, DEFAULT_KIND);
+    }
+
+    public static WstValueTable getTable(River river, int kind) {
+
+        Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME);
+
+        WstValueTableCacheKey cacheKey;
+
+        if (cache != null) {
+            cacheKey = new WstValueTableCacheKey(river.getId(), kind);
+            Element element = cache.get(cacheKey);
+            if (element != null) {
+                log.debug("got wst value table from cache");
+                return (WstValueTable)element.getValue();
+            }
+        }
+        else {
+            cacheKey = null;
+        }
+
+        WstValueTable valueTable = getTableUncached(river, kind);
+
+        if (valueTable != null && cacheKey != null) {
+            log.debug("store wst value table in cache");
+            Element element = new Element(cacheKey, valueTable);
+            cache.put(element);
+        }
+
+        return valueTable;
+    }
+
+    public static WstValueTable getTableUncached(River river) {
+        return getTableUncached(river, DEFAULT_KIND);
+    }
+
+    public static WstValueTable getTableUncached(River river, int kind) {
+
+        Session session = SessionHolder.HOLDER.get();
+
+        Wst wst = loadWst(session, river, kind);
+
+        if (wst == null) {
+            return null;
+        }
+
+        WstValueTable.Column [] columns = loadColumns(session, wst);
+
+        loadQRanges(session, columns, wst);
+
+        List<WstValueTable.Row> rows = loadRows(session, wst, columns.length);
+
+        return new WstValueTable(columns, rows);
+    }
+
+    protected static Wst loadWst(Session session, River river, int kind) {
+        Query query = session.createQuery(HQL_WST);
+        query.setParameter("river", river);
+        query.setInteger("kind",    kind);
+
+        List<Wst> wsts = query.list();
+
+        return wsts.isEmpty() ? null : wsts.get(0);
+    }
+
+    protected static List<WstValueTable.Row> loadRows(
+        Session session,
+        Wst     wst,
+        int     numColumns
+    ) {
+        SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS)
+            .addScalar("km",         StandardBasicTypes.DOUBLE)
+            .addScalar("w",          StandardBasicTypes.DOUBLE)
+            .addScalar("column_pos", StandardBasicTypes.INTEGER);
+
+        sqlQuery.setInteger("wst_id", wst.getId());
+
+        List<Object []> results = sqlQuery.list();
+
+        int lastColumn = Integer.MAX_VALUE;
+        double [] ws = null;
+
+        ArrayList<WstValueTable.Row> rows = new ArrayList<WstValueTable.Row>();
+
+        for (Object [] result: results) {
+            int column = (Integer)result[2];
+            if (column < lastColumn) {
+                ws = new double[numColumns];
+                WstValueTable.Row row =
+                    new WstValueTable.Row((Double)result[0], ws);
+                rows.add(row);
+            }
+            Double w = (Double)result[1];
+            ws[column] = w != null ? w : Double.NaN;
+            lastColumn = column;
+        }
+
+        rows.trimToSize();
+        return rows;
+    }
+
+    protected static WstValueTable.Column [] loadColumns(
+        Session session,
+        Wst     wst
+    ) {
+        SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_NAMES_POS)
+            .addScalar("position",   StandardBasicTypes.INTEGER)
+            .addScalar("name",       StandardBasicTypes.STRING);
+
+        sqlQuery.setInteger("wst_id", wst.getId());
+
+        List<Object []> columnNames = sqlQuery.list();
+
+        WstValueTable.Column [] columns =
+            new WstValueTable.Column[columnNames.size()];
+
+        for (int i = 0; i < columns.length; ++i) {
+            columns[i] = new WstValueTable.Column(
+                (String)columnNames.get(i)[1]);
+        }
+        return columns;
+    }
+
+    protected static void loadQRanges(
+        Session                 session,
+        WstValueTable.Column [] columns,
+        Wst                     wst
+    ) {
+        SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_QS)
+            .addScalar("column_pos", StandardBasicTypes.INTEGER)
+            .addScalar("q",          StandardBasicTypes.DOUBLE)
+            .addScalar("a",          StandardBasicTypes.DOUBLE)
+            .addScalar("b",          StandardBasicTypes.DOUBLE);
+
+        sqlQuery.setInteger("wst_id", wst.getId());
+
+        List<Object []> qRanges = sqlQuery.list();
+
+        int     start      = -1;
+        int     Q          = qRanges.size();
+        Integer lastColumn = null;
+
+        for (int i = 0; i < Q; ++i) {
+            Object [] qRange = qRanges.get(i);
+            Integer columnId = (Integer)qRange[0];
+            if (lastColumn == null) {
+                lastColumn = columnId;
+                start = i;
+            }
+            else if (!lastColumn.equals(columnId)) {
+                QRangeTree qRangeTree = new QRangeTree(qRanges, start, i);
+                columns[lastColumn].setQRangeTree(qRangeTree);
+                lastColumn = columnId;
+                start = i;
+            }
+        }
+
+        if (start != -1) {
+            QRangeTree qRangeTree = new QRangeTree(qRanges, start, Q);
+            columns[lastColumn].setQRangeTree(qRangeTree);
+        }
+
+        /* This is debug code to visualize the q ranges trees
+
+        java.io.PrintWriter out = null;
+        try {
+            out = new java.io.PrintWriter(
+                new java.io.FileWriter(
+                    "/tmp/qranges" + System.currentTimeMillis() + ".dot"));
+
+            out.println("graph \"Q ranges trees\" {");
+
+            for (int i = 0; i < columns.length; ++i) {
+                QRangeTree tree = columns[i].getQRangeTree();
+                out.println(tree.toGraph());
+            }
+
+            out.println("}");
+
+            out.flush();
+        }
+        catch (java.io.IOException ioe) {
+            log.error(ioe);
+        }
+        finally {
+            if (out != null) {
+                out.close();
+            }
+        }
+        */
+    }
+
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/resources/Resources.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,144 @@
+package de.intevation.flys.artifacts.resources;
+
+import java.text.MessageFormat;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallMeta;
+
+/**
+ * This class provides methods for i18n.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class Resources {
+
+    /** The logger that is used in this class.*/
+    private static Logger logger = Logger.getLogger(Resources.class);
+
+    /** The singleton instance.*/
+    private static Resources INSTANCE;
+
+    /** The locales supported by this server.*/
+    protected Locale[] locales;
+
+    /**
+     * No instance of this class is necessary.
+     */
+    private Resources() {
+    }
+
+
+    /**
+     * Returns the locales supported by this server.
+     *
+     * @return the supported locales.
+     */
+    public Locale[] getLocales() {
+        if (locales == null) {
+            readLocales();
+        }
+
+        return locales;
+    }
+
+
+    /**
+     * Read the locales configured for this server.
+     */
+    protected void readLocales() {
+        // TODO IMPLEMENT ME
+
+        locales = new Locale[2];
+        locales[0] = Locale.GERMANY;
+        locales[1] = Locale.ENGLISH;
+    }
+
+
+    public static Locale getLocale(CallMeta meta) {
+        if (INSTANCE == null) {
+            INSTANCE = new Resources();
+        }
+
+        Locale[] locales = INSTANCE.getLocales();
+        return meta.getPreferredLocale(locales);
+    }
+
+
+    /**
+     * This method returns the translated value for <i>key</i> or <i>def</i> if
+     * <i>key</i> is not existing in the resource bundle.
+     *
+     * @param meta The CallMeta object of the request that contains the
+     * preferred locale.
+     * @param key The key that should be translated.
+     * @param def A default value that is returned, if <i>key</i> was not found.
+     *
+     * @return the translated message.
+     */
+    public static String getMsg(CallMeta meta, String key, String def) {
+        if (INSTANCE == null) {
+            INSTANCE = new Resources();
+        }
+
+        Locale[] locales = INSTANCE.getLocales();
+        Locale   locale  = meta.getPreferredLocale(locales);
+
+        return getMsg(locale, key, def);
+    }
+
+
+    /**
+     * Returns a translated message based on a template specified by <i>key</i>
+     * that has necessary values to be filled in.
+     *
+     * @param meta The CallMeta object.
+     * @param key The key of the template in the resource bundle.
+     * @param def the default value if no template was found with <i>key</i>.
+     * @param args The arguments that are necessary for the template.
+     *
+     * @return a translated string.
+     */
+    public static String getMsg(
+        CallMeta meta,
+        String   key,
+        String   def,
+        Object[] args)
+    {
+        String template = getMsg(meta, key, null);
+
+        if (template == null) {
+            return def;
+        }
+
+        return MessageFormat.format(template, args);
+    }
+
+
+    /**
+     * This method returns the translated value for <i>key</i> or <i>def</i> if
+     * <i>key</i> is not existing in the resource bundle.
+     *
+     * @param locale The locale.
+     * @param key The key that should be translated.
+     * @param def A default value that is returned, if <i>key</i> was not found.
+     *
+     * @return the translated message.
+     */
+    public static String getMsg(Locale locale, String key, String def) {
+        ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
+
+        try {
+            return bundle.getString(key);
+        }
+        catch (MissingResourceException mre) {
+            logger.warn("No message found for key: " + key);
+
+            return def;
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,226 @@
+package de.intevation.flys.artifacts.services;
+
+import java.math.BigDecimal;
+import java.util.Iterator;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.DefaultService;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.Annotation;
+import de.intevation.flys.model.Attribute;
+import de.intevation.flys.model.Position;
+import de.intevation.flys.model.Range;
+import de.intevation.flys.model.Edge;
+
+import de.intevation.flys.artifacts.model.AnnotationsFactory;
+
+import org.hibernate.Session;
+
+import de.intevation.flys.artifacts.cache.CacheFactory;
+
+import net.sf.ehcache.Cache;
+
+/**
+ * This service provides information about distances of a specified river.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DistanceInfoService extends DefaultService {
+
+    private static enum DistanceFilter {
+        NONE, LOCATIONS, DISTANCES
+    }
+
+    /** The logger used in this service. */
+    private static Logger logger = Logger.getLogger(DistanceInfoService.class);
+
+    public static final String CACHE_NAME = "service-distanceinfo";
+
+    public static final String RIVER_XPATH = "/art:river/text()";
+
+    public static final String FILTER_XPATH = "/art:river/art:filter/text()";
+
+
+    /**
+     * The default constructor.
+     */
+    public DistanceInfoService() {
+    }
+
+
+    @Override
+    public Document process(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        logger.debug("DistanceInfoService.process");
+
+        String river = XMLUtils.xpathString(
+            data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE);
+
+        String filter  = XMLUtils.xpathString(
+            data, FILTER_XPATH, ArtifactNamespaceContext.INSTANCE);
+
+        if (river == null || (river = river.trim()).length() == 0) {
+            logger.warn("No river specified. Cannot return distance info!");
+            return XMLUtils.newDocument();
+        }
+
+        logger.debug("Search distances for river: " + river);
+
+        Cache cache = CacheFactory.getCache(CACHE_NAME);
+
+        if (cache == null) {
+            logger.debug("no cache configured for distance info");
+            return getUncached(river, filter);
+        }
+
+
+        String key = getCacheKey(river, filter);
+
+        net.sf.ehcache.Element element = cache.get(key);
+
+        if (element != null) {
+            logger.debug("distance info found in cache");
+            return (Document)element.getValue();
+        }
+
+        Document result = getUncached(river, filter);
+
+        element = new net.sf.ehcache.Element(key, result);
+
+        logger.debug("store distance info found into cache");
+
+        cache.put(element);
+
+        return result;
+    }
+
+
+    protected String getCacheKey(String river, String filtertype) {
+        return filtertype != null && filtertype.length() > 0
+            ? river + "_" + filtertype
+            : river;
+    }
+
+
+    protected Document getUncached(String river, String filtertype) {
+
+        Document result = XMLUtils.newDocument();
+
+        Session session = SessionHolder.acquire();
+
+        try {
+            Iterator<Annotation> iter =
+                AnnotationsFactory.getAnnotationsIterator(river);
+
+            Element all = result.createElement("distances");
+
+            DistanceFilter filter = getDistanceFilter(filtertype);
+
+            while (iter.hasNext()) {
+                Annotation a = iter.next();
+                Element distance = buildDistanceNode(result, a, filter);
+
+                if (distance != null) {
+                    all.appendChild(distance);
+                }
+            }
+
+            result.appendChild(all);
+        }
+        finally {
+            session.close();
+            SessionHolder.release();
+        }
+
+        return result;
+    }
+
+
+    protected static DistanceFilter getDistanceFilter(String type) {
+        if (type.equals("locations")) {
+            logger.debug("Found 'location' filter.");
+            return DistanceFilter.LOCATIONS;
+        }
+        else if (type.equals("distances")) {
+            logger.debug("Found 'distances' filter.");
+            return DistanceFilter.DISTANCES;
+        }
+
+        logger.debug("Do not use any filter at all.");
+
+        return DistanceFilter.NONE;
+    }
+
+
+    /**
+     * Builds an Element for a distance info.
+     *
+     * @param anno The Annotation that provides information about the distance.
+     *
+     * @return an Element that contains information about a distance.
+     */
+    protected static Element buildDistanceNode(
+        Document       document,
+        Annotation     anno,
+        DistanceFilter filter
+    ) {
+        Position   pos   = anno.getPosition();
+        Range      range = anno.getRange();
+        Attribute  attr  = anno.getAttribute();
+        Edge       edge  = anno.getEdge();
+        BigDecimal a     = range.getA();
+        BigDecimal b     = range.getB();
+
+        if (b == null && filter == DistanceFilter.DISTANCES) {
+            return null;
+        }
+
+        if (b != null && filter == DistanceFilter.LOCATIONS) {
+            return null;
+        }
+
+        Element distance = document.createElement("distance");
+
+        distance.setAttribute("description", pos.getValue());
+
+        String riverSide = attr.getValue();
+
+        if (riverSide != null && riverSide.length() > 0) {
+            distance.setAttribute("riverside", riverSide);
+        }
+
+        if (a != null) {
+            distance.setAttribute("from", a.toString());
+        }
+        if (b != null) {
+            distance.setAttribute("to", b.toString());
+        }
+        if (edge != null) {
+            BigDecimal bottom = edge.getBottom();
+            BigDecimal top    = edge.getTop();
+            if (bottom != null) {
+                distance.setAttribute("bottom", bottom.toString());
+            }
+            if (top != null) {
+                distance.setAttribute("top", top.toString());
+            }
+        }
+
+        return distance;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MainValuesService.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,318 @@
+package de.intevation.flys.artifacts.services;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.hibernate.Session;
+
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+
+import de.intevation.artifactdatabase.DefaultService;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.MainValue;
+import de.intevation.flys.model.MainValueType;
+import de.intevation.flys.model.NamedMainValue;
+import de.intevation.flys.model.Range;
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.model.MainValuesFactory;
+import de.intevation.flys.artifacts.model.RiverFactory;
+
+
+/**
+ * This service returns the main values of a river's gauge based on the start
+ * and end point of the river.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class MainValuesService extends DefaultService {
+
+    /** The logger that is used by this service.*/
+    private static Logger logger = Logger.getLogger(MainValuesService.class);
+
+
+    /** The XPath that points to the river definition of the incoming request.*/
+    public static final String XPATH_RIVER = "/art:mainvalues/art:river/text()";
+
+    /** The XPath that points to the start definition of the incoming request.*/
+    public static final String XPATH_START = "/art:mainvalues/art:start/text()";
+
+    /** The XPath that points to the end definition of the incoming request.*/
+    public static final String XPATH_END = "/art:mainvalues/art:end/text()";
+
+    /**
+     * The default constructor.
+     */
+    public MainValuesService() {
+    }
+
+
+    @Override
+    public Document process(
+        Document      data,
+        GlobalContext context,
+        CallMeta      callMeta
+    ) {
+        logger.debug("MainValuesService.process");
+
+        try {
+            River river     = getRequestedRiver(data);
+            double[] minmax = getRequestedStartEnd(data, river);
+            Gauge gauge     = river.determineGauge(minmax[0], minmax[1]);
+
+            List<MainValue> mainValues = getMainValues(river, gauge);
+
+            return buildDocument(river, gauge, mainValues, context);
+        }
+        catch (NullPointerException npe) {
+            logger.error("Could not process the request.");
+            logger.error(npe, npe);
+
+            return XMLUtils.newDocument();
+        }
+    }
+
+
+    /**
+     * This method extracts the river from the incoming request. If no river
+     * string was found or no river is found in the database based on this
+     * string a NullPointerException is thrown.
+     *
+     * @param data The incoming request data.
+     *
+     * @return the River object.
+     */
+    protected River getRequestedRiver(Document data)
+    throws    NullPointerException
+    {
+        logger.debug("MainValuesService.getRiver");
+
+        String riverStr = XMLUtils.xpathString(
+            data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
+
+        if (riverStr == null || riverStr.trim().length() == 0) {
+            throw new NullPointerException("No river found in the request.");
+        }
+
+        River river = RiverFactory.getRiver(riverStr);
+
+        if (river == null) {
+            throw new NullPointerException("No such river found: " + riverStr);
+        }
+
+        return river;
+    }
+
+
+    /**
+     * This method extracts the start and end point from incoming request
+     * document and returns both values in an array. If no start and end strings
+     * are found in the document, the min/max values of the <i>river</i> are
+     * returned.
+     *
+     * @param data The incoming request data.
+     * @param river The river of the request.
+     *
+     * @return the start and end point.
+     */
+    protected double[] getRequestedStartEnd(Document data, River river) {
+        logger.debug("MainValuesService.getStartEnd");
+
+        String startStr = XMLUtils.xpathString(
+            data, XPATH_START, ArtifactNamespaceContext.INSTANCE);
+
+        String endStr = XMLUtils.xpathString(
+            data, XPATH_END, ArtifactNamespaceContext.INSTANCE);
+
+        try {
+            double start = Double.parseDouble(startStr);
+            double end   = Double.parseDouble(endStr);
+
+            logger.debug("Found start: " + start);
+            logger.debug("Found end: " + end);
+
+            return new double[] { start, end };
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn(nfe, nfe);
+
+            return river.determineMinMaxDistance();
+        }
+    }
+
+
+    /**
+     * This method creates the result document that includes the main values of
+     * the specified <i>gauge</i>.
+     *
+     * @param river The river.
+     * @param gauge The gauge.
+     *
+     * @return a document that includes the main values of the specified river
+     * at the specified gauge.
+     */
+    protected List<MainValue> getMainValues(River river, Gauge gauge)
+    throws    NullPointerException
+    {
+        if (logger.isDebugEnabled()) {
+            logger.debug("MainValuesService.buildMainValues");
+            logger.debug("River: " + river.getName());
+            logger.debug("Gauge: " + gauge.getName());
+        }
+
+        Session session = SessionHolder.acquire();
+        try {
+            List<MainValue> mainValues = MainValuesFactory.getMainValues(gauge);
+
+            if (mainValues == null || mainValues.isEmpty()) {
+                throw new NullPointerException("No main values found.");
+            }
+
+            logger.debug(mainValues.size() + " main values found.");
+
+            return mainValues;
+        }
+        finally {
+            session.close();
+            SessionHolder.release();
+        }
+    }
+
+
+    protected Document buildDocument(
+        River           river,
+        Gauge           gauge,
+        List<MainValue> mainValues,
+        Object          context)
+    {
+        logger.debug("MainValuesService.buildDocument");
+
+        Document doc = XMLUtils.newDocument();
+
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element rootEl = cr.create("service");
+        cr.addAttr(rootEl, "name", "mainvalues");
+
+        doc.appendChild(rootEl);
+
+        appendMetaInformation(doc, rootEl, river, gauge, context);
+        appendMainValues(doc, rootEl, mainValues, context);
+
+        return doc;
+    }
+
+
+    /**
+     * This method appends some meta information to the result document.
+     * Currently, the river's and gauge's names and the gauge's range are
+     * appended.
+     *
+     * @param root The root element of the result document.
+     * @param river The river.
+     * @param gauge The gauge.
+     * @param context The context object.
+     */
+    protected void appendMetaInformation(
+        Document doc,
+        Element  root,
+        River    river,
+        Gauge    gauge,
+        Object   context)
+    {
+        logger.debug("MainValuesService.appendMetaInformation");
+
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Range range = gauge.getRange();
+
+        Element riverEl = cr.create("river");
+        cr.addAttr(riverEl, "name", river.getName());
+
+        Element gaugeEl = cr.create("gauge");
+        cr.addAttr(gaugeEl, "name", gauge.getName());
+        cr.addAttr(gaugeEl, "from", range.getA().toString());
+        cr.addAttr(gaugeEl, "to", range.getB().toString());
+
+        root.appendChild(riverEl);
+        root.appendChild(gaugeEl);
+    }
+
+
+    protected void appendMainValues(
+        Document        doc,
+        Element         root,
+        List<MainValue> mainValues,
+        Object          context)
+    {
+        logger.debug("MainValuesService.appendMainValues");
+
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element list = cr.create("mainvalues");
+
+        for (MainValue mainValue: mainValues) {
+            Element newEl = buildMainValueElement(doc, mainValue, context);
+
+            if (newEl != null) {
+                list.appendChild(newEl);
+            }
+        }
+
+        root.appendChild(list);
+    }
+
+
+    /**
+     * This method builds a concrete mainvalue element. This element consists of
+     * three attributes: the value, its name and its type.
+     *
+     * @param doc The owner document.
+     * @param mainValue The mainvalue.
+     * @param context The context object.
+     *
+     * @return a mainvalue element.
+     */
+    protected Element buildMainValueElement(
+        Document  doc,
+        MainValue mainValue,
+        Object    context)
+    {
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        NamedMainValue namedMainValue = mainValue.getMainValue();
+        MainValueType  mainValueType  = namedMainValue.getType();
+
+        Element el = cr.create("mainvalue");
+
+        cr.addAttr(el, "value", mainValue.getValue().toString());
+        cr.addAttr(el, "name", namedMainValue.getName());
+        cr.addAttr(el, "type", mainValueType.getName());
+
+        return el;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,125 @@
+package de.intevation.flys.artifacts.services;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import com.vividsolutions.jts.geom.Geometry;
+
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.Config;
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.DefaultService;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.model.RiverAxis;
+import de.intevation.flys.utils.GeometryUtils;
+
+/**
+ * This service provides information about the supported rivers by this
+ * application.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class MapInfoService extends DefaultService {
+
+    /** XPath that points to the river.*/
+    public static final String XPATH_RIVER = "/mapinfo/river/text()";
+
+    public static final String XPATH_RIVER_PROJECTION =
+        "/artifact-database/floodmap/river[@name='%RIVER%']/srid/@value";
+
+    public static final String XPATH_RIVER_BACKGROUND =
+        "/artifact-database/floodmap/river[@name='%RIVER%']/background-wms";
+
+    public static final String XPATH_RIVER_WMS =
+        "/artifact-database/floodmap/river[@name='%RIVER%']/river-wms/@url";
+
+
+    /** The logger used in this service.*/
+    private static Logger logger = Logger.getLogger(MapInfoService.class);
+
+
+    /**
+     * The default constructor.
+     */
+    public MapInfoService() {
+    }
+
+
+    public Document process(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        logger.debug("MapInfoService.process");
+
+        Document result   = XMLUtils.newDocument();
+        ElementCreator cr = new ElementCreator(result, null, null);
+
+        Element mapinfo = cr.create("mapinfo");
+        result.appendChild(mapinfo);
+
+        String river = extractRiver(data);
+        if (river == null || river.length() == 0) {
+            logger.warn("Cannot generate information: river is empty!");
+            return result;
+        }
+
+        Element root = cr.create("river");
+        cr.addAttr(root, "name", river);
+        mapinfo.appendChild(root);
+
+        RiverAxis axis = RiverAxis.getRiverAxis(river);
+        if (axis != null) {
+            Geometry geom   = axis.getGeom().getBoundary();
+            String   bounds = GeometryUtils.jtsBoundsToOLBounds(geom);
+
+            logger.debug("River '" + river + "' bounds: " + bounds);
+            Element bbox = cr.create("bbox");
+            cr.addAttr(bbox, "value", bounds);
+            root.appendChild(bbox);
+        }
+
+        String xpathS  = XPATH_RIVER_PROJECTION.replace("%RIVER%", river);
+        String sridStr = Config.getStringXPath(xpathS);
+        if (sridStr != null && sridStr.length() > 0) {
+            Element srid = cr.create("srid");
+            cr.addAttr(srid, "value", sridStr);
+            root.appendChild(srid);
+        }
+
+        String xpathB = XPATH_RIVER_BACKGROUND.replace("%RIVER%", river);
+        Element back  = (Element) Config.getNodeXPath(xpathB);
+        if (back != null) {
+            Element background = cr.create("background-wms");
+            cr.addAttr(background, "url", back.getAttribute("url"));
+            cr.addAttr(background, "layers", back.getAttribute("layers"));
+            root.appendChild(background);
+        }
+
+        String xpathWMS = XPATH_RIVER_WMS.replace("%RIVER%", river);
+        String wmsStr   = Config.getStringXPath(xpathWMS);
+        if (wmsStr != null && wmsStr.length() > 0) {
+            Element wms = cr.create("river-wms");
+            cr.addAttr(wms, "url", wmsStr);
+            root.appendChild(wms);
+        }
+
+        return result;
+    }
+
+
+    protected String extractRiver(Document data) {
+        return XMLUtils.xpathString(
+            data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,171 @@
+package de.intevation.flys.artifacts.services;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import java.util.Map;
+import java.util.HashMap;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+
+import de.intevation.artifactdatabase.DefaultService;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.StringUtils;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+
+import de.intevation.flys.artifacts.datacage.Recommendations;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+public class MetaDataService
+extends      DefaultService
+{
+    private static Logger log = Logger.getLogger(MetaDataService.class);
+
+    public static final String XPATH_ARTIFACT_ID = "/art:meta/art:artifact-id/@value";
+    public static final String XPATH_USER_ID     = "/art:meta/art:user-id/@value";
+    public static final String XPATH_OUTS        = "/art:meta/art:outs/@value";
+    public static final String XPATH_PARAMETERS  = "/art:meta/art:parameters/@value";
+
+    /** The global context key of the artifact database. */
+    public static final String ARTIFACT_DATA_BASE_KEY =
+        "global.artifact.database";
+
+    public MetaDataService() {
+    }
+
+    @Override
+    public Document process(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        log.debug("MetaDataService.process");
+
+        String artifactId = XMLUtils.xpathString(
+            data, XPATH_ARTIFACT_ID, ArtifactNamespaceContext.INSTANCE);
+
+        if (artifactId != null
+        && (artifactId = artifactId.trim()).length() == 0) {
+            artifactId = null;
+        }
+
+        String userId = XMLUtils.xpathString(
+            data, XPATH_USER_ID, ArtifactNamespaceContext.INSTANCE);
+
+        if (userId != null
+        && (userId = userId.trim()).length() == 0) {
+            userId = null;
+        }
+
+        String outs = XMLUtils.xpathString(
+            data, XPATH_OUTS, ArtifactNamespaceContext.INSTANCE);
+
+        String parameters = XMLUtils.xpathString(
+            data, XPATH_PARAMETERS, ArtifactNamespaceContext.INSTANCE);
+
+        return doService(
+            artifactId, userId, outs, parameters, globalContext);
+    }
+
+    protected static Map<String, Object> splitParameters(
+        String              parameters,
+        Map<String, Object> data
+    ) {
+        if (parameters != null) {
+            String [] parts = parameters.split("\\s*;\\s*");
+            for (String part: parts) {
+                String [] kv = part.split("\\s*:\\s*");
+                if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
+                    continue;
+                }
+                String [] values = kv[1].split("\\s*,\\s*");
+                data.put(kv[0], values.length == 1 ? values[0] : values);
+            }
+        }
+        return data;
+    }
+
+    protected Document doService(
+        String        artifactId,
+        String        userId,
+        String        outsString,
+        String        parameters,
+        GlobalContext globalContext
+    ) {
+        Document result = XMLUtils.newDocument();
+
+        FLYSArtifact flysArtifact;
+
+        if (log.isDebugEnabled()) {
+            log.debug("artifact  : " + artifactId);
+            log.debug("user      : " + userId);
+            log.debug("outs      : " + outsString);
+            log.debug("parameters: " + parameters);
+        }
+
+        if (userId != null && !StringUtils.checkUUID(userId)) {
+            log.warn("'" + userId + "' is not a UUID");
+            return result;
+        }
+
+        if (artifactId != null) {
+            if (!StringUtils.checkUUID(artifactId)) {
+                log.warn("'" + artifactId + "' is not a UUID");
+                return result;
+            }
+
+            Object dbObject =
+                (ArtifactDatabase)globalContext.get(ARTIFACT_DATA_BASE_KEY);
+
+            if (!(dbObject instanceof ArtifactDatabase)) {
+                log.error("Cannot find artifact database");
+                return result;
+            }
+
+            ArtifactDatabase db = (ArtifactDatabase)dbObject;
+
+            Artifact artifact;
+
+            try {
+                artifact = db.getRawArtifact(artifactId);
+            }
+            catch (ArtifactDatabaseException adbe) {
+                log.warn("fetching artifact failed", adbe);
+                return result;
+            }
+
+            if (!(artifact instanceof FLYSArtifact)) {
+                log.warn("artifact is not a FLYS artifact.");
+                return result;
+            }
+
+            flysArtifact = (FLYSArtifact)artifact;
+        }
+        else {
+            flysArtifact = null;
+        }
+
+
+        Map<String, Object> data = splitParameters(
+            parameters, new HashMap<String, Object>());
+
+        String [] outs = outsString == null
+            ? new String [0]
+            : outsString.split("\\s*,\\s*");
+        
+        Recommendations rec = Recommendations.getInstance();
+        rec.recommend(
+            flysArtifact, userId, outs, data, result);
+
+        return result;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/RiverService.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,81 @@
+package de.intevation.flys.artifacts.services;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.CallMeta;
+import de.intevation.artifacts.GlobalContext;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.DefaultService;
+
+import de.intevation.flys.backend.SessionHolder;
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.model.RiverFactory;
+
+import org.hibernate.Session;
+
+/**
+ * This service provides information about the supported rivers by this
+ * application.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class RiverService extends DefaultService {
+
+    /** The logger used in this service.*/
+    private static Logger logger = Logger.getLogger(RiverService.class);
+
+
+    /**
+     * The default constructor.
+     */
+    public RiverService() {
+    }
+
+
+    public Document process(
+        Document      data,
+        GlobalContext globalContext,
+        CallMeta      callMeta
+    ) {
+        logger.debug("RiverService.process");
+
+        Document result = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            result,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Session session = SessionHolder.acquire();
+        try {
+            List<River> allRivers = RiverFactory.getRivers();
+
+            Element rivers = ec.create("rivers");
+
+            for (River river: allRivers) {
+                Element r = ec.create("river");
+                ec.addAttr(r, "name", river.getName(), true);
+
+                rivers.appendChild(r);
+            }
+
+            result.appendChild(rivers);
+        }
+        finally {
+            session.close();
+            SessionHolder.release();
+        }
+
+        return result;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/AnnotationRiverState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,63 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.model.AnnotationFacet;
+import de.intevation.flys.artifacts.model.FacetTypes;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+/**
+ * The only state for an AnnotationArtifact (River is known).
+ */
+public class AnnotationRiverState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** Developer-centric description of facet. */
+    public static final String I18N_DESCRIPTION = "facet.longitudinal_section.annotations";
+
+    /** The logger that is used in this state. */
+    private static final Logger logger = Logger.getLogger(AnnotationRiverState.class);
+
+
+    /**
+     * Add an AnnotationFacet to list of Facets.
+     *
+     * @param artifact Ignored.
+     * @param hash Ignored.
+     * @param context Ignored.
+     * @param meta CallMeta to be used for internationalization.
+     * @param facets List to add AnnotationFacet to.
+     *
+     * @return null.
+     */
+    @Override
+    public Object computeInit(
+        FLYSArtifact artifact,
+        String       hash,
+        Object       context,
+        CallMeta     meta,
+        List<Facet>  facets
+    ) {
+        logger.debug("AnnotationRiverState.computeInit()");
+
+        AnnotationFacet facet = new AnnotationFacet(
+            0,
+            LONGITUDINAL_ANNOTATION,
+            Resources.getMsg(meta, I18N_DESCRIPTION, I18N_DESCRIPTION));
+        facets.add(facet);
+
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/CalculationSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,126 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.resources.Resources;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class CalculationSelect extends DefaultState {
+
+    /** The logger that is used in this class. */
+    private static Logger logger = Logger.getLogger(CalculationSelect.class);
+
+
+    public static final String FIELD_MODE = "calculation_mode";
+
+    /** Constant value for the reference line calculation. */
+    public static final String CALCULATION_SURFACE_CURVE =
+        "calc.surface.curve";
+
+    /** Constant value for the differences calculation. */
+    public static final String CALCULATION_DURATION_CURVE =
+        "calc.duration.curve";
+
+    /** Constant value for the flood map calculation. */
+    public static final String CALCULATION_FLOOD_MAP =
+        "calc.flood.map";
+
+    /** Constant value for the profile calculation. */
+    public static final String CALCULATION_DISCHARGE_LONGITUDINAL_CURVE =
+        "calc.discharge.longitudinal.section";
+
+    /** Constant value for the state discharge curve calculation. */
+    public static final String CALCULATION_DISCHARGE_CURVE =
+        "calc.discharge.curve";
+
+    /** Constant value for the state w differences calculation. */
+    public static final String CALCULATION_W_DIFFERENCES =
+        "calc.w.differences";
+
+    /** An array that holds all available calculation modes. */
+    public static final String[] CALCULATIONS = {
+        CALCULATION_SURFACE_CURVE,
+        CALCULATION_FLOOD_MAP,
+        CALCULATION_DISCHARGE_CURVE,
+        CALCULATION_DURATION_CURVE,
+        CALCULATION_DISCHARGE_LONGITUDINAL_CURVE,
+        CALCULATION_W_DIFFERENCES };
+
+
+    /** Error message that is thrown if no mode has been chosen. */
+    public static final String ERROR_NO_CALCULATION_MODE =
+        "error_feed_no_calculation_mode";
+
+    /** Error message that is thrown if an invalid calculation mode has been
+     * chosen. */
+    public static  final String ERROR_INVALID_CALCULATION_MODE =
+        "error_feed_invalid_calculation_mode";
+
+
+    public CalculationSelect() {
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        CallMeta meta   = context.getMeta();
+        Element[] calcs = new Element[CALCULATIONS.length];
+
+        int i = 0;
+
+        for (String calc: CALCULATIONS) {
+            calcs[i++] = createItem(
+                cr, new String[] {
+                    Resources.getMsg(meta, calc, calc),
+                    calc
+                });
+        }
+
+        return calcs;
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("CalculationSelect.validate");
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData data = getData(flys, FIELD_MODE);
+        String    calc = (data != null) ? (String) data.getValue() : null;
+
+        if (calc == null) {
+            throw new IllegalArgumentException(ERROR_NO_CALCULATION_MODE);
+        }
+
+        calc = calc.trim().toLowerCase();
+
+        for (String mode: CALCULATIONS) {
+            if (mode.equals(calc)) {
+                return true;
+            }
+        }
+
+        throw new IllegalArgumentException(ERROR_INVALID_CALCULATION_MODE);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ComputationRangeState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,223 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.data.StateData;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.artifacts.model.WaterlevelFacet;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.resources.Resources;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputationRangeState
+extends    RangeState
+implements FacetTypes
+{
+    private static Logger logger =
+        Logger.getLogger(ComputationRangeState.class);
+
+
+    /** The name of the 'from' field. */
+    public static final String FROM = "ld_from";
+
+    /** The name of the 'to' field. */
+    public static final String TO = "ld_to";
+
+    /** The name of the 'step' field. */
+    public static final String STEP = "ld_step";
+
+    /** The default step width.*/
+    public static final int DEFAULT_STEP = 100;
+
+
+
+    public ComputationRangeState() {
+    }
+
+
+    @Override
+    protected Element createData(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        StateData   data,
+        CallContext context)
+    {
+        Element select = ProtocolUtils.createArtNode(
+            cr, "select", null, null);
+
+        cr.addAttr(select, "name", data.getName(), true);
+
+        Element label = ProtocolUtils.createArtNode(
+            cr, "label", null, null);
+
+        Element choices = ProtocolUtils.createArtNode(
+            cr, "choices", null, null);
+
+        label.setTextContent(Resources.getMsg(
+            context.getMeta(),
+            data.getName(),
+            data.getName()));
+
+        select.appendChild(label);
+
+        return select;
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        double[] minmax = getMinMax(artifact);
+
+        double minVal = Double.MIN_VALUE;
+        double maxVal = Double.MAX_VALUE;
+
+        if (minmax != null) {
+            minVal = minmax[0];
+            maxVal = minmax[1];
+        }
+        else {
+            logger.warn("Could not read min/max distance values!");
+        }
+
+        if (name.equals("ld_from")) {
+            Element min = createItem(
+                cr,
+                new String[] {"min", new Double(minVal).toString()});
+
+            return new Element[] { min };
+        }
+        else if (name.equals("ld_to")) {
+            Element max = createItem(
+                cr,
+                new String[] {"max", new Double(maxVal).toString()});
+
+            return new Element[] { max };
+        }
+        else {
+            Element step = createItem(
+                cr,
+                new String[] {"step", String.valueOf(getDefaultStep())});
+            return new Element[] { step };
+        }
+
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+
+
+    @Override
+    public Object computeFeed(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        logger.debug("computeFeed");
+
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getDischargeCurveData();
+
+        if (facets == null) {
+            logger.debug("generate no facets");
+            return res;
+        }
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        logger.debug("generate " + wqkms.length + " facets.");
+
+        String stateID = winfo.getCurrentStateId();
+
+        for (int i = 0; i < wqkms.length; ++i) {
+            String name = wqkms[i].getName();
+            facets.add(new WaterlevelFacet(
+                i, DISCHARGE_CURVE, name, ComputeType.FEED, stateID, hash));
+        }
+
+
+        return res;
+    }
+
+
+    @Override
+    protected double[] getMinMax(Artifact artifact) {
+        FLYSArtifact flysArtifact = (FLYSArtifact) artifact;
+        StateData    data         = getData(flysArtifact, "river");
+
+        String name = data != null ? (String) data.getValue() : "";
+
+        logger.debug("Search for the min/max distances of '" + name + "'");
+
+        River river = RiverFactory.getRiver(name);
+
+        return river != null ? river.determineMinMaxDistance() : null;
+    }
+
+
+    protected double getDefaultStep() {
+        return DEFAULT_STEP;
+    }
+
+
+    @Override
+    protected String getLowerField() {
+        return FROM;
+    }
+
+
+    @Override
+    protected String getUpperField() {
+        return TO;
+    }
+
+
+    @Override
+    protected String getStepField() {
+        return STEP;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ComputedDischargeCurveState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,87 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WaterlevelFacet;
+import de.intevation.flys.artifacts.model.DataFacet;
+import de.intevation.flys.artifacts.model.ReportFacet;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+/**
+ * The final state that will be reached after the discharge curve calculation
+ * mode has been chosen.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputedDischargeCurveState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state.*/
+    private static Logger logger =
+        Logger.getLogger(ComputedDischargeCurveState.class);
+
+    public ComputedDischargeCurveState() {
+    }
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getComputedDischargeCurveData();
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        if (facets != null && wqkms.length > 0) {
+            for (int i = 0; i < wqkms.length; ++i) {
+
+                Object[] args = new Object[] {
+                    FLYSUtils.getRiver(winfo).getName(),
+                    wqkms[i].getName()
+                };
+
+                String name = Resources.getMsg(
+                    context.getMeta(),
+                    "chart.computed.discharge.curve.curve.label",
+                    "",
+                    args);
+
+                facets.add(new WaterlevelFacet(i, COMPUTED_DISCHARGE_Q, name));
+                facets.add(new WaterlevelFacet(i, AT, "AT data"));
+            }
+
+            facets.add(new DataFacet(CSV, "CSV data"));
+
+            if (res.getReport().hasProblems()) {
+                facets.add(new ReportFacet());
+            }
+        }
+
+        return res;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DGMSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,13 @@
+package de.intevation.flys.artifacts.states;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DGMSelect extends DefaultState {
+
+    @Override
+    protected String getUIProvider() {
+        return "dgm_datacage_panel";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DefaultState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,389 @@
+package de.intevation.flys.artifacts.states;
+
+import java.text.NumberFormat;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.Map;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifactdatabase.state.AbstractState;
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class DefaultState extends AbstractState {
+
+    /** The logger that is used in this class. */
+    private static Logger logger = Logger.getLogger(DefaultState.class);
+
+    public static enum ComputeType {
+        FEED, ADVANCE, INIT
+    }
+
+    protected StateData getData(FLYSArtifact artifact,  String name) {
+        return artifact.getData(name);
+    }
+
+
+    /**
+     * Append to a node and return xml description relevant for gui.
+     */
+    public Element describeStatic(
+        Artifact    artifact,
+        Document    document,
+        Node        root,
+        CallContext context,
+        String      uuid)
+    {
+        ElementCreator creator = new ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        CallMeta meta = context.getMeta();
+
+        String label = Resources.getMsg(meta, getID(), getID());
+        Element ui   = ProtocolUtils.createArtNode(
+            creator, "state",
+            new String[] { "name", "uiprovider", "label" },
+            new String[] { getID(), getUIProvider(), label });
+
+        Map<String, StateData> theData = getData();
+        if (theData == null) {
+            return ui;
+        }
+
+        Iterator<String> iter = theData.keySet().iterator();
+        FLYSArtifact     flys = (FLYSArtifact) artifact;
+
+        while (iter.hasNext()) {
+            String name = iter.next();
+            appendStaticData(flys, context, creator, ui, name);
+        }
+
+        return ui;
+    }
+
+
+    protected void appendStaticData(
+        FLYSArtifact   flys,
+        CallContext    context,
+        ElementCreator cr,
+        Element        ui,
+        String         name
+    ) {
+        StateData data  = getData(flys, name);
+        String    value = (data != null) ? (String) data.getValue() : null;
+
+        if (value == null) {
+            return;
+        }
+
+        logger.debug("Append element '" + name + "' (" + value + ")");
+
+        Element e = createStaticData(cr, context, name, value, data.getType());
+
+        ui.appendChild(e);
+
+    }
+
+
+    /**
+     * Creates a <i>data</i> element used in the static part of the DESCRIBE
+     * document.
+     *
+     * @param creator The ElementCreator that is used to build new Elements.
+     * @param meta The CallMeta object used for i18n.
+     * @param name The name of the data item.
+     * @param value The value as string.
+     *
+     * @return an Element.
+     */
+    protected Element createStaticData(
+        ElementCreator creator,
+        CallContext    cc,
+        String         name,
+        String         value,
+        String         type
+    ) {
+        CallMeta meta = cc.getMeta();
+
+        Element dataElement = creator.create("data");
+        creator.addAttr(dataElement, "name", name, true);
+        creator.addAttr(dataElement, "type", type, true);
+
+        Element itemElement = creator.create("item");
+        creator.addAttr(itemElement, "value", value, true);
+
+        String attrValue = "";
+        try {
+            // XXX A better way to format the output would be to use the
+            // 'type' value of the data objects.
+            double doubleVal = Double.valueOf(value);
+            Locale         l = Resources.getLocale(meta);
+            NumberFormat  nf = NumberFormat.getInstance(l);
+
+            attrValue = nf.format(doubleVal);
+        }
+        catch (NumberFormatException nfe) {
+            attrValue = Resources.getMsg(meta, value, value);
+        }
+
+        creator.addAttr(itemElement, "label", attrValue, true);
+        dataElement.appendChild(itemElement);
+
+        return dataElement;
+    }
+
+
+    public Element describe(
+        Artifact    artifact,
+        Document    document,
+        Node        root,
+        CallContext context,
+        String      uuid)
+    {
+        ElementCreator creator = new ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element ui        = null;
+        String uiprovider = getUIProvider();
+        if (uiprovider != null) {
+            ui = ProtocolUtils.createArtNode(
+                creator, "dynamic",
+                new String[] { "uiprovider" },
+                new String[] { uiprovider });
+        }
+        else {
+            ui = ProtocolUtils.createArtNode(creator, "dynamic", null, null);
+        }
+
+        Map<String, StateData> theData = getData();
+        if (theData == null) {
+            return ui;
+        }
+
+        Iterator<String> iter = theData.keySet().iterator();
+        FLYSArtifact     flys = (FLYSArtifact) artifact;
+
+        while (iter.hasNext()) {
+            String    name = iter.next();
+            StateData data = getData(flys, name);
+
+            data = data != null ? data : getData(name);
+
+            Element select = createData(creator, artifact, data, context);
+
+            String defValue = (String) data.getValue();
+            String defDesc  = null;
+
+            if (defValue != null && defValue.length() > 0) {
+                defDesc = Resources.getMsg(
+                    context.getMeta(),
+                    defValue,
+                    defValue);
+            }
+
+            if (defValue != null && defDesc != null) {
+                creator.addAttr(select, "defaultValue", defValue, true);
+                creator.addAttr(select, "defaultLabel", defDesc, true);
+            }
+
+            Element choices = ProtocolUtils.createArtNode(
+            creator, "choices", null, null);
+
+            select.appendChild(choices);
+            ui.appendChild(select);
+
+            Element[] items = createItems(creator, artifact, name, context);
+            if (items != null) {
+                for (Element item: items) {
+                    choices.appendChild(item);
+                }
+            }
+        }
+
+        return ui;
+    }
+
+
+    /**
+     * This method creates the root node that contains the list of selectable
+     * items.
+     *
+     * @param cr The ElementCreator.
+     * @param name The name of the amount of data.
+     *
+     * @return the root node of the item list.
+     */
+    protected Element createData(
+        ElementCreator cr,
+        Artifact    artifact,
+        StateData   data,
+        CallContext context)
+    {
+        Element select = ProtocolUtils.createArtNode(
+            cr, "select", null, null);
+        cr.addAttr(select, "name", data.getName(), true);
+
+        Element label = ProtocolUtils.createArtNode(
+            cr, "label", null, null);
+
+        select.appendChild(label);
+
+        label.setTextContent(Resources.getMsg(
+            context.getMeta(),
+            getID(),
+            getID()));
+
+        return select;
+    }
+
+
+    /**
+     * This method creates a list of items. These items represent the amount of
+     * input data that is possible for this state.
+     *
+     * @param cr The ElementCreator.
+     * @param name The name of the amount of data.
+     *
+     * @return a list of items.
+     */
+    protected Element[] createItems(
+        ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context
+    ) {
+        return null;
+    }
+
+
+    /**
+     * This method is used to create an <i>item</i> Element that contains two
+     * further elements <i>label</i> and <i>value</i>. The label and value
+     * elements both have text nodes.
+     *
+     * @param cr The ElementCreator used to build new Elements.
+     * @param obj This implementation awaits a String array with [0] = label and
+     * [1] = value.
+     *
+     * @return an Element.
+     */
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+
+
+    /**
+     * This method transform a given value into a StateData object.
+     *
+     * @param flys The FLYSArtifact.
+     * @param name The name of the data object.
+     * @param val The value of the data object.
+     *
+     * @return a StateData object with <i>name</i> and <i>val</i>ue.
+     */
+    public StateData transform(
+        FLYSArtifact flys,
+        CallContext  cc,
+        String       name,
+        String       val
+    ) {
+        logger.debug("Transform data ('" + name + "','" + val + "')");
+        return new DefaultStateData(name, null, null, val);
+    }
+
+
+    /**
+     * This method validates the inserted data and returns true, if everything
+     * was correct, otherwise an exception is thrown.
+     *
+     * @param artifact A reference to the owner artifact.
+     *
+     * @return true, if everything was fine.
+     */
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        return true;
+    }
+
+
+    protected String getUIProvider() {
+        return null;
+    }
+
+
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        return null;
+    }
+
+
+    public Object computeFeed(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        return null;
+    }
+
+
+    public Object computeInit(
+        FLYSArtifact artifact,
+        String       hash,
+        Object       context,
+        CallMeta     meta,
+        List<Facet>  facets)
+    {
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DischargeLongitudinalSection.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,99 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.ReportFacet;
+import de.intevation.flys.artifacts.model.WaterlevelFacet;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.model.WQCKms;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+import de.intevation.flys.artifacts.model.DataFacet;
+
+public class DischargeLongitudinalSection
+extends      DefaultState
+implements   FacetTypes
+{
+    private static Logger logger =
+        Logger.getLogger(DischargeLongitudinalSection.class);
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getDischargeLongitudinalSectionData();
+
+        if (facets == null) {
+            return res;
+        }
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        for (int i = 0; i < wqkms.length; i++) {
+            String nameW = null;
+            String nameQ = null;
+
+            if (winfo.isQ()) {
+                nameQ = wqkms[i].getName();
+                nameW = "W(" + nameQ + ")";
+            }
+            else {
+                nameW = wqkms[i].getName();
+                nameQ = "Q(" + nameQ + ")";
+            }
+
+            Facet w = new WaterlevelFacet(
+                i, DISCHARGE_LONGITUDINAL_W, nameW);
+
+            Facet q = new WaterlevelFacet(
+                i, DISCHARGE_LONGITUDINAL_Q, nameQ);
+
+            facets.add(w);
+            facets.add(q);
+
+            if (wqkms[i] instanceof WQCKms) {
+                // TODO DO i18n
+
+                String nameC = nameW.replace(
+                    "Benutzerdefiniert",
+                    "Benutzerdefiniert [korrigiert]");
+
+                Facet c = new WaterlevelFacet(
+                    i, DISCHARGE_LONGITUDINAL_C, nameC);
+
+                facets.add(c);
+            }
+        }
+
+        if (wqkms.length > 0) {
+            facets.add(new DataFacet(CSV, "CSV data"));
+            facets.add(new DataFacet(WST, "WST data"));
+        }
+
+        if (res.getReport().hasProblems()) {
+            facets.add(new ReportFacet());
+        }
+
+        return res;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DistanceSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,24 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DistanceSelect extends ComputationRangeState {
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(DistanceSelect.class);
+
+
+    public DistanceSelect() {
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "distance_panel";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DurationCurveState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,98 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.DurationCurveFacet;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WQDay;
+
+import de.intevation.flys.artifacts.model.DataFacet;
+import de.intevation.flys.artifacts.model.ReportFacet;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * The final state that will be reached after the duration curve calculation
+ * mode has been chosen.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DurationCurveState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static Logger logger = Logger.getLogger(DurationCurveState.class);
+
+    public DurationCurveState() {
+    }
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+
+        CalculationResult res;
+
+        if (old instanceof CalculationResult) {
+            res = (CalculationResult)old;
+        }
+        else {
+            res = winfo.getDurationCurveData();
+        }
+
+        WQDay wqday = (WQDay)res.getData();
+
+        if (wqday != null && facets != null) {
+            Object[] args = new Object[] {
+                FLYSUtils.getRiver(winfo).getName()
+            };
+
+            String nameW = Resources.getMsg(
+                context.getMeta(),
+                "chart.duration.curve.curve.w",
+                "",
+                args);
+
+            String nameQ = Resources.getMsg(
+                context.getMeta(),
+                "chart.duration.curve.curve.q",
+                "",
+                args);
+
+            Facet w = new DurationCurveFacet(DURATION_W, nameW);
+            Facet q = new DurationCurveFacet(DURATION_Q, nameQ);
+
+            facets.add(w);
+            facets.add(q);
+
+            facets.add(new DataFacet(CSV, "CSV data"));
+
+            if (res.getReport().hasProblems()) {
+                facets.add(new ReportFacet());
+            }
+        }
+
+        return res;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/FloodMapState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,787 @@
+package de.intevation.flys.artifacts.states;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.vividsolutions.jts.geom.Coordinate;
+import com.vividsolutions.jts.geom.Geometry;
+import com.vividsolutions.jts.geom.LineString;
+import com.vividsolutions.jts.geom.MultiPolygon;
+import com.vividsolutions.jts.geom.Polygon;
+
+import org.apache.log4j.Logger;
+
+import org.opengis.feature.simple.SimpleFeature;
+import org.opengis.feature.simple.SimpleFeatureType;
+
+import org.geotools.feature.FeatureCollection;
+import org.geotools.feature.FeatureCollections;
+import org.geotools.feature.simple.SimpleFeatureBuilder;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.FileTools;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.CrossSectionTrack;
+import de.intevation.flys.model.DGM;
+import de.intevation.flys.model.Floodplain;
+import de.intevation.flys.model.RiverAxis;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.CalculationMessage;
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.model.WMSLayerFacet;
+import de.intevation.flys.artifacts.model.WSPLGENCalculation;
+import de.intevation.flys.artifacts.model.WSPLGENJob;
+import de.intevation.flys.artifacts.model.WSPLGENReportFacet;
+import de.intevation.flys.artifacts.resources.Resources;
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+import de.intevation.flys.exports.WstWriter;
+import de.intevation.flys.utils.FLYSUtils;
+import de.intevation.flys.utils.GeometryUtils;
+import de.intevation.flys.utils.MapfileGenerator;
+import de.intevation.flys.wsplgen.JobObserver;
+import de.intevation.flys.wsplgen.Scheduler;
+
+
+public class FloodMapState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static Logger logger = Logger.getLogger(FloodMapState.class);
+
+
+    public static final String KEEP_ARTIFACT_DIR =
+        System.getProperty("flys.uesk.keep.artifactsdir", "false");
+
+
+    public static final String WSP_ARTIFACT = "wsp";
+
+    public static final String WINFO_WSP_STATE_ID = "state.winfo.waterlevel";
+
+    public static final String WSPLGEN_PARAMETER_FILE = "wsplgen.par";
+    public static final String WSPLGEN_BARRIERS_LINES = "barrier_lines.shp";
+    public static final String WSPLGEN_BARRIERS_POLY  = "barrier_polygons.shp";
+    public static final String WSPLGEN_AXIS           = "axis.shp";
+    public static final String WSPLGEN_QPS            = "qps.shp";
+    public static final String WSPLGEN_FLOODPLAIN     = "talaue.shp";
+    public static final String WSPLGEN_WSP_FILE       = "waterlevel.wst";
+    public static final String WSPLGEN_OUTPUT_FILE    = "wsplgen.shp";
+
+    public static final int WSPLGEN_DEFAULT_OUTPUT = 0;
+
+
+
+    /**
+     * Inner class that is used to create facets. An instance of this class is
+     * used while packaging the data for the WSPLGEN calculation.
+     */
+    private static class FacetCreator {
+        protected FLYSArtifact artifact;
+        protected List<Facet>  facets;
+        protected String url;
+        protected String hash;
+        protected String stateId;
+
+        public FacetCreator(FLYSArtifact artifact, String hash, String sId) {
+            this.facets     = new ArrayList<Facet>(2);
+            this.artifact   = artifact;
+            this.hash       = hash;
+            this.stateId    = sId;
+        }
+
+        protected String getRiver() {
+            return artifact.getDataAsString("river");
+        }
+
+        protected String getUrl() {
+            String url = FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPSERVER_URL);
+            url = url + "user-wms";
+            return url;
+        }
+
+        protected String getSrid() {
+            return FLYSUtils.getRiverSrid(artifact);
+        }
+
+        protected String getBounds() {
+            return GeometryUtils.getRiverBounds(getRiver());
+        }
+
+        public List<Facet> getFacets() {
+            return facets;
+        }
+
+        public void createWSPLGENFacet() {
+            WMSLayerFacet wsplgen = new WMSLayerFacet(
+                0,
+                FLOODMAP_WSPLGEN,
+                "Ergebnis der WSPLGEN Berechnung",
+                ComputeType.ADVANCE,
+                stateId,
+                hash,
+                getUrl());
+
+            wsplgen.addLayer(
+                artifact.identifier() + MapfileGenerator.MS_WSPLGEN_POSTFIX);
+            wsplgen.setSrid(getSrid());
+            wsplgen.setExtent(getBounds());
+
+            facets.add(wsplgen);
+        }
+
+        public void createBarrierFacet() {
+            WMSLayerFacet barriers = new WMSLayerFacet(
+                1,
+                FLOODMAP_WSPLGEN,
+                "Rohre/Graeben/Daemme",
+                ComputeType.ADVANCE,
+                stateId,
+                hash,
+                getUrl());
+
+            barriers.addLayer(
+                artifact.identifier() + MapfileGenerator.MS_BARRIERS_POSTFIX);
+            barriers.setSrid(getSrid());
+            barriers.setExtent(getBounds());
+
+            facets.add(barriers);
+        }
+    } // end of FacetCreator
+
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        logger.debug("FloodMapState.computeAdvance");
+
+        File artifactDir = getDirectory(artifact);
+
+        if (artifactDir == null) {
+            logger.error("Could not create directory for WSPLGEN results!");
+            return null;
+        }
+
+        WSPLGENCalculation calculation = new WSPLGENCalculation();
+
+        FacetCreator facetCreator = new FacetCreator(artifact, hash, getID());
+
+        WSPLGENJob job = prepareWSPLGENJob(
+            artifact,
+            facetCreator,
+            artifactDir,
+            context,
+            calculation);
+
+        CalculationResult  res   = new CalculationResult(null, calculation);
+        WSPLGENReportFacet report= new WSPLGENReportFacet(
+            ComputeType.ADVANCE, hash, getID(), res);
+
+        facets.add(report);
+
+        if (job == null) {
+            if (KEEP_ARTIFACT_DIR.equals("false")) {
+                removeDirectory(artifact);
+            }
+
+            calculation.addError(-1, Resources.getMsg(
+                context.getMeta(),
+                "wsplgen.job.error",
+                "wsplgen.job.error"));
+
+            logger.error("No WSPLGEN processing has been started!");
+
+            return null;
+        }
+
+        Scheduler scheduler = Scheduler.getInstance();
+        scheduler.addJob(job);
+
+        facetCreator.createWSPLGENFacet();
+
+        facets.addAll(facetCreator.getFacets());
+
+        context.afterCall(CallContext.BACKGROUND);
+        context.addBackgroundMessage(new CalculationMessage(
+            JobObserver.STEPS.length,
+            0,
+            Resources.getMsg(
+                context.getMeta(),
+                "wsplgen.job.queued",
+                "wsplgen.job.queued")
+        ));
+
+        return null;
+    }
+
+
+    /**
+     * Returns (and creates if not existing) the directory for storing WSPLEN
+     * data for the owner artifact.
+     *
+     * @param artifact The owner Artifact.
+     *
+     * @return the directory for WSPLEN data.
+     */
+    protected File getDirectory(FLYSArtifact artifact) {
+        String shapePath = FLYSUtils.getXPathString(
+            FLYSUtils.XPATH_SHAPEFILE_DIR);
+
+        File artifactDir = FileTools.getDirectory(
+            shapePath, artifact.identifier());
+
+        return artifactDir;
+    }
+
+
+    /**
+     * Removes the directory and all its content where the required data and the
+     * results of WSPLGEN are stored. Should be called in endOfLife().
+     */
+    protected void removeDirectory(FLYSArtifact artifact) {
+        String shapePath = FLYSUtils.getXPathString(
+            FLYSUtils.XPATH_SHAPEFILE_DIR);
+
+        File artifactDir = new File(shapePath, artifact.identifier());
+
+        if (artifactDir.exists()) {
+            logger.info("Delete directory: " + artifactDir.getAbsolutePath());
+            boolean success = FileTools.deleteRecursive(artifactDir);
+        }
+        else {
+            logger.debug("There is no directory to remove.");
+        }
+    }
+
+
+    @Override
+    public void endOfLife(Artifact artifact, Object callContext) {
+        logger.info("FloodMapState.endOfLife: " + artifact.identifier());
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        removeDirectory(flys);
+    }
+
+
+    protected WSPLGENJob prepareWSPLGENJob(
+        FLYSArtifact       artifact,
+        FacetCreator       facetCreator,
+        File               artifactDir,
+        CallContext        context,
+        WSPLGENCalculation calculation
+    ) {
+        logger.debug("FloodMapState.prepareWSPLGENJob");
+
+        WSPLGENJob job = new WSPLGENJob(
+            artifact,
+            artifactDir,
+            context,
+            calculation);
+
+        File paraFile = new File(artifactDir, WSPLGEN_PARAMETER_FILE);
+
+        setOut(artifact, job);
+        setRange(artifact, job);
+        setDelta(artifact, job);
+        setGel(artifact, job);
+        setDist(artifact, job);
+        setLine(artifact, facetCreator, artifactDir, job);
+        setAxis(artifact, artifactDir, job);
+        setPro(artifact, artifactDir, job);
+        setDgm(artifact, job);
+        setArea(artifact, artifactDir, job);
+        setOutFile(artifact, job);
+        setWsp(artifact, context, artifactDir, job);    // WSP
+
+        // TODO
+        // setWspTag(artifact, job);
+
+        try {
+            job.toFile(paraFile);
+
+            return job;
+        }
+        catch (IOException ioe) {
+            logger.warn("Cannot write PAR file: " + ioe.getMessage());
+        }
+        catch (IllegalArgumentException iae) {
+            logger.warn("Cannot write PAR file: " + iae.getMessage());
+        }
+
+        return null;
+    }
+
+
+    protected void setOut(FLYSArtifact artifact, WSPLGENJob job) {
+        job.setOut(WSPLGEN_DEFAULT_OUTPUT);
+    }
+
+
+    protected void setRange(FLYSArtifact artifact, WSPLGENJob job) {
+        double[] range = FLYSUtils.getKmRange(artifact);
+
+        job.setStart(range[0]);
+        job.setEnd(range[1]);
+    }
+
+
+    protected void setDelta(FLYSArtifact artifact, WSPLGENJob job) {
+        String from = artifact.getDataAsString("diff_from");
+        String to   = artifact.getDataAsString("diff_to");
+        String diff = artifact.getDataAsString("diff_diff");
+
+        try {
+            job.setFrom(Double.parseDouble(from));
+        }
+        catch (NumberFormatException nfe) {
+        }
+
+        try {
+            job.setTo(Double.parseDouble(to));
+        }
+        catch (NumberFormatException nfe) {
+        }
+
+        try {
+            job.setDiff(Double.parseDouble(diff));
+        }
+        catch (NumberFormatException nfe) {
+        }
+    }
+
+
+    protected void setGel(FLYSArtifact artifact, WSPLGENJob job) {
+        String gel = artifact.getDataAsString("use_floodplain");
+
+        if (gel != null && gel.length() > 0) {
+            boolean use = Boolean.parseBoolean(gel);
+
+            if (use) {
+                job.setGel(WSPLGENJob.GEL_SPERRE);
+            }
+            else {
+                job.setGel(WSPLGENJob.GEL_NOSPERRE);
+            }
+        }
+    }
+
+
+    protected void setDist(FLYSArtifact artifact, WSPLGENJob job) {
+        String dist = artifact.getDataAsString("profile_distance");
+
+        try {
+            job.setDist(Double.parseDouble(dist));
+        }
+        catch (NumberFormatException nfe) {
+            // nothing to do here
+        }
+    }
+
+
+    protected void setLine(
+        FLYSArtifact artifact,
+        FacetCreator facetCreator,
+        File         dir,
+        WSPLGENJob   job
+    ) {
+        String geoJSON = artifact.getDataAsString("uesk.barriers");
+        String srid    = FLYSUtils.getRiverSrid(artifact);
+        String srs     = "EPSG:" + srid;
+
+        if (geoJSON == null || geoJSON.length() == 0) {
+            logger.debug("No barrier features in parameterization existing.");
+            return;
+        }
+
+        SimpleFeatureType ft = getBarriersFeatureType(
+            "barriers", srs, Geometry.class);
+
+        List<SimpleFeature> features = GeometryUtils.parseGeoJSON(geoJSON, ft);
+        if (features == null || features.size() == 0) {
+            logger.debug("No barrier features extracted.");
+            return;
+        }
+
+        FeatureCollection[] fcs = splitLinesAndPolygons(features);
+
+        File shapeLines = new File(dir, WSPLGEN_BARRIERS_LINES);
+        File shapePolys = new File(dir, WSPLGEN_BARRIERS_POLY);
+
+        Object[][] obj = new Object[][] {
+            new Object[] { "typ", String.class }
+        };
+
+        boolean l = GeometryUtils.writeShapefile(
+            shapeLines,
+            GeometryUtils.buildFeatureType("lines", srs, LineString.class, obj),
+            fcs[0]);
+
+        if (l) {
+            logger.debug(
+                "Successfully created barrier line shapefile. " +
+                "Write shapefile path into WSPLGEN job.");
+            job.addLin(shapeLines.getAbsolutePath());
+        }
+
+        boolean p = GeometryUtils.writeShapefile(
+            shapePolys,
+            GeometryUtils.buildFeatureType("polygons", srs, Polygon.class, obj),
+            fcs[1]);
+
+        if (p) {
+            logger.debug(
+                "Successfully created barrier polygon shapefile. " +
+                "Write shapefile path into WSPLGEN job.");
+            job.addLin(shapePolys.getAbsolutePath());
+        }
+
+        if (p || l) {
+            facetCreator.createBarrierFacet();
+        }
+    }
+
+
+    protected SimpleFeatureType getBarriersFeatureType(
+        String name,
+        String srs,
+        Class  type
+    ) {
+        Object[][] attrs = new Object[2][];
+        attrs[0] = new Object[] { "typ", String.class };
+        attrs[1] = new Object[] { "elevation", Double.class };
+
+        return GeometryUtils.buildFeatureType(name, srs, type, attrs);
+    }
+
+
+    protected FeatureCollection[] splitLinesAndPolygons(List<SimpleFeature> f) {
+        FeatureCollection lines    = FeatureCollections.newCollection();
+        FeatureCollection polygons = FeatureCollections.newCollection();
+
+        for (SimpleFeature feature: f) {
+            Geometry geom = (Geometry) feature.getDefaultGeometry();
+
+
+            if (geom instanceof LineString) {
+                geom = applyElevationAttribute(feature, (LineString) geom);
+                lines.add(feature);
+            }
+            else if (geom instanceof Polygon) {
+                geom = applyElevationAttribute(feature, (Polygon) geom);
+                polygons.add(feature);
+            }
+            else {
+                logger.warn("Feature not supported: " + geom.getClass());
+            }
+        }
+
+        logger.debug("Found " + lines.size() + " barrier lines.");
+        logger.debug("Found " + polygons.size() + " barrier polygons.");
+
+        return new FeatureCollection[] { lines, polygons };
+    }
+
+
+    protected static Geometry applyElevationAttribute(
+        SimpleFeature feature,
+        Geometry      geom
+    ) {
+        logger.debug("Apply elevations for: " + geom.getClass());
+
+        List<Double> elevations = extractElevations(feature);
+        int           numPoints = geom.getNumPoints();
+        int        numElevation = elevations.size();
+
+        String typ = (String) feature.getAttribute("typ");
+
+        if (numPoints > numElevation) {
+            logger.warn("More vertices in Geometry than elevations given.");
+        }
+
+        Coordinate[] c = geom.getCoordinates();
+        for (int i = 0; i < numPoints; i++) {
+            if (i < numElevation) {
+                c[i].z = elevations.get(i);
+            }
+            else if (typ != null && typ.equals("Graben")) {
+                c[i].z = -9999d;
+            }
+            else {
+                c[i].z = 9999d;
+            }
+        }
+
+        return geom;
+    }
+
+
+    protected static List<Double> extractElevations(SimpleFeature feature) {
+        String tmp = (String) feature.getAttribute("elevation");
+        String typ = (String) feature.getAttribute("typ");
+
+        String[] elevations = tmp == null ? null : tmp.split(" ");
+
+        int num = elevations != null ? elevations.length : 0;
+
+        List<Double> list = new ArrayList<Double>(num);
+
+        for (int i = 0; i < num; i++) {
+            try {
+                list.add(Double.parseDouble(elevations[i]));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn("Error while parsing elevation at pos: " + i);
+                if (typ != null && typ.equals("Graben")) {
+                    list.add(new Double(-9999.0));
+                }
+                else {
+                    list.add(new Double(9999.0));
+                }
+            }
+        }
+
+        return list;
+    }
+
+
+    protected void setAxis(FLYSArtifact artifact, File dir, WSPLGENJob job) {
+        String river = artifact.getDataAsString("river");
+        String srid    = FLYSUtils.getRiverSrid(artifact);
+        String srs     = "EPSG:" + srid;
+
+        RiverAxis axis = RiverAxis.getRiverAxis(river);
+        if (axis == null) {
+            logger.warn("Could not find river axis for: '" + river + "'");
+            return;
+        }
+
+        Geometry geom = axis.getGeom();
+
+        SimpleFeatureType ft = GeometryUtils.buildFeatureType(
+            "axis", srs, LineString.class);
+
+        SimpleFeatureBuilder builder = new SimpleFeatureBuilder(ft);
+        builder.add(geom);
+
+        FeatureCollection collection = FeatureCollections.newCollection();
+        collection.add(builder.buildFeature("0"));
+
+        File axisShape = new File(dir, WSPLGEN_AXIS);
+
+        boolean a = GeometryUtils.writeShapefile(
+            axisShape,
+            GeometryUtils.buildFeatureType("axis", srs, LineString.class),
+            collection);
+
+        if (a) {
+            job.setAxis(axisShape.getAbsolutePath());
+        }
+    }
+
+
+    protected void setPro(FLYSArtifact artifact, File dir, WSPLGENJob job) {
+        String river = artifact.getDataAsString("river");
+        String srid    = FLYSUtils.getRiverSrid(artifact);
+        String srs     = "EPSG:" + srid;
+
+        List<CrossSectionTrack> cst =
+            CrossSectionTrack.getCrossSectionTrack(river);
+
+        logger.debug("Found " + cst.size() + " CrossSectionTracks.");
+
+        Object[][] attrs = new Object[2][];
+        attrs[0] = new Object[] { "ELEVATION", Double.class };
+        attrs[1] = new Object[] { "KILOMETER", Double.class };
+
+        SimpleFeatureType ft = GeometryUtils.buildFeatureType(
+            "qps", srs, LineString.class, attrs);
+
+        SimpleFeatureBuilder builder = new SimpleFeatureBuilder(ft);
+        FeatureCollection collection = FeatureCollections.newCollection();
+
+        int i = 0;
+        for (CrossSectionTrack track: cst) {
+            builder.reset();
+            builder.add(track.getGeom());
+            builder.add(track.getZ().doubleValue());
+            builder.add(track.getKm().doubleValue());
+
+            collection.add(builder.buildFeature(String.valueOf(i++)));
+        }
+
+        File qpsShape = new File(dir, WSPLGEN_QPS);
+
+        boolean q = GeometryUtils.writeShapefile(
+            qpsShape,
+            GeometryUtils.buildFeatureType("qps", srs, LineString.class, attrs),
+            collection);
+
+        if (q) {
+            job.setPro(qpsShape.getAbsolutePath());
+        }
+    }
+
+
+    protected void setDgm(FLYSArtifact artifact, WSPLGENJob job) {
+        String dgm_id = artifact.getDataAsString("dgm");
+
+        int id = -1;
+        try {
+            id = Integer.parseInt(dgm_id);
+        }
+        catch (NumberFormatException nfe) { /* do nothing */ }
+
+        DGM dgm = DGM.getDGM(id);
+
+        if (dgm == null) {
+            logger.warn("Could not find specified DGM.");
+
+            return;
+        }
+
+        job.setDgm(dgm.getPath());
+    }
+
+
+    protected void setArea(FLYSArtifact artifact, File dir, WSPLGENJob job) {
+        String river = artifact.getDataAsString("river");
+        String srid  = FLYSUtils.getRiverSrid(artifact);
+        String srs   = "EPSG:" + srid;
+
+        Floodplain plain = Floodplain.getFloodplain(river);
+
+        SimpleFeatureType ft = GeometryUtils.buildFeatureType(
+            "talaue", srs, MultiPolygon.class);
+
+        SimpleFeatureBuilder builder = new SimpleFeatureBuilder(ft);
+        builder.add(plain.getGeom());
+
+        FeatureCollection collection = FeatureCollections.newCollection();
+        collection.add(builder.buildFeature("0"));
+
+        File talaueShape = new File(dir, WSPLGEN_FLOODPLAIN);
+
+        boolean t = GeometryUtils.writeShapefile(
+            talaueShape,
+            GeometryUtils.buildFeatureType("talaue", srs, MultiPolygon.class),
+            collection);
+
+        if (t) {
+            job.setArea(talaueShape.getAbsolutePath());
+        }
+    }
+
+
+    protected void setOutFile(FLYSArtifact artifact, WSPLGENJob job) {
+        job.setOutFile(WSPLGEN_OUTPUT_FILE);
+    }
+
+
+    protected WQKms getWQKms(FLYSArtifact flys, CallContext cc) {
+        String   wspString = flys.getDataAsString(WSP_ARTIFACT);
+        String[] parts     = wspString.split(";");
+
+        String otherArtifact = parts[0];
+
+        int idx = -1;
+        try {
+            idx = Integer.parseInt(parts[2]);
+        }
+        catch (NumberFormatException nfe) { /* do nothing */ }
+
+        FLYSArtifact src = otherArtifact != null
+            ? FLYSUtils.getArtifact(otherArtifact, cc)
+            : flys;
+
+        logger.debug("Use waterlevel provided by Artifact: " + src.identifier());
+
+        CalculationResult rawData = (CalculationResult) src.compute(
+            cc,
+            null,
+            WINFO_WSP_STATE_ID,
+            ComputeType.ADVANCE,
+            false);
+
+        WQKms[] wqkms = (WQKms[]) rawData.getData();
+
+        return wqkms == null || idx == -1 || idx >= wqkms.length
+            ? null
+            : wqkms[idx];
+    }
+
+
+    protected void setWsp(
+        FLYSArtifact artifact,
+        CallContext  context,
+        File         dir,
+        WSPLGENJob   job)
+    {
+        logger.debug("FloodMapState.setWsp");
+
+        WQKms data = getWQKms(artifact, context);
+
+        if (data == null) {
+            logger.warn("No WST data found!");
+            return;
+        }
+
+        WstWriter writer = new WstWriter(1);
+
+        // TODO REMOVE job.setWspTag(...) This is only used until the user is
+        // able to select the WSP column himself!
+        boolean writeWspTag = true;
+
+        double[] buf = new double[4];
+        logger.debug("Add WST column: " + data.getName());
+        writer.addColumn(data.getName());
+
+        if (writeWspTag) {
+            job.setWspTag(data.getName());
+            writeWspTag = false;
+        }
+
+        for (int i = 0, num = data.size(); i < num; i++) {
+            data.get(i, buf);
+            writer.add(buf);
+        }
+
+        FileOutputStream fout = null;
+
+        try {
+            File wspFile = new File(dir, WSPLGEN_WSP_FILE);
+            fout         = new FileOutputStream(wspFile);
+
+            writer.write(fout);
+
+            job.setWsp(wspFile.getAbsolutePath());
+        }
+        catch (FileNotFoundException fnfe) {
+            logger.warn("Error while writing wsp file: " + fnfe.getMessage());
+        }
+        finally {
+            if (fout != null) {
+                try {
+                    fout.close();
+                }
+                catch (IOException ioe) { /* do nothing */ }
+            }
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/FloodplainChoice.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,63 @@
+package de.intevation.flys.artifacts.states;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class FloodplainChoice extends DefaultState {
+
+    public static final String OPTION = "floodplain.option";
+
+
+    @Override
+    protected String getUIProvider() {
+        return "boolean_panel";
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        CallMeta meta = context.getMeta();
+
+        Element option = createItem(
+            cr,
+            new String[] { Resources.getMsg(meta, OPTION, OPTION), "true" });
+
+        return new Element[] { option };
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/LocationDistanceSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,146 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import gnu.trove.TDoubleArrayList;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class LocationDistanceSelect
+extends      ComputationRangeState
+{
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(LocationDistanceSelect.class);
+
+
+    /** The name of the 'mode' field. */
+    public static final String MODE = "ld_mode";
+
+    /** The name of the 'locations' field.*/
+    public static final String LOCATIONS = "ld_locations";
+
+
+    /**
+     * The default constructor that initializes an empty State object.
+     */
+    public LocationDistanceSelect() {
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "location_distance_panel";
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("LocationDistanceSelect.validate");
+
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+
+        if (flys.isRange()) {
+            return super.validate(flys);
+        }
+        else {
+            return validateLocations(flys);
+        }
+    }
+
+
+    protected boolean validateLocations(WINFOArtifact flys)
+    throws    IllegalArgumentException
+    {
+        StateData dValues = getData(flys, LOCATIONS);
+        String    values  = dValues != null ? (String)dValues.getValue() : null;
+
+        if (values == null || values.length() == 0) {
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        double[] absMinMax = getMinMax(flys);
+        double[] relMinMax = getMinMaxFromString(values);
+
+        if (relMinMax[0] < absMinMax[0] || relMinMax[0] > absMinMax[1]) {
+            throw new IllegalArgumentException("error_feed_from_out_of_range");
+        }
+
+        if (relMinMax[1] > absMinMax[1] || relMinMax[1] < absMinMax[0]) {
+            throw new IllegalArgumentException("error_feed_to_out_of_range");
+        }
+
+        return true;
+    }
+
+
+    /**
+     * Extracts the min/max values from String <i>s</i>. An
+     * IllegalArgumentException is thrown if there is a value that throws a
+     * NumberFormatException.
+     *
+     * @param s String that contains whitespace separated double values.
+     *
+     * @return a 2dmin array [min,max].
+     */
+    public static double[] getMinMaxFromString(String s)
+    throws IllegalArgumentException
+    {
+        String[] values = s.split(" ");
+
+        double[] minmax = new double[] {
+            Double.MAX_VALUE,
+            -Double.MAX_VALUE };
+
+        for (String v: values) {
+            try {
+                double value = Double.valueOf(v);
+
+                minmax[0] = minmax[0] < value ? minmax[0] : value;
+                minmax[1] = minmax[1] > value ? minmax[1] : value;
+            }
+            catch (NumberFormatException nfe) {
+                throw new IllegalArgumentException(
+                    "error_invalid_double_value");
+            }
+        }
+
+        return minmax;
+    }
+
+
+    public static double[] getLocations(WINFOArtifact flys) {
+        StateData data  = flys.getData("ld_locations");
+        String    value = data != null ? (String) data.getValue() : null;
+
+        if (value == null || value.length() == 0) {
+            logger.warn("No location data given.");
+            return null;
+        }
+
+        String[]         splitted = value.split(" ");
+        TDoubleArrayList values   = new TDoubleArrayList();
+
+        for (String split: splitted) {
+            try {
+                values.add(Double.valueOf(split));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        return values.toNativeArray();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/LocationSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,134 @@
+package de.intevation.flys.artifacts.states;
+
+import gnu.trove.TDoubleArrayList;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+
+/**
+ * This state is used to realize the input of multiple locations as string. The
+ * string should be a whitespace separated list of double values where each
+ * double value represents a location.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class LocationSelect extends LocationDistanceSelect {
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(LocationSelect.class);
+
+
+    /** The name of the StateData object that stores the location string.*/
+    public static final String FIELD_LOCATIONS = "ld_locations";
+
+
+    public LocationSelect() {
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "location_panel";
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        double[] minmax = getMinMax(artifact);
+
+        double minVal = Double.MIN_VALUE;
+        double maxVal = Double.MAX_VALUE;
+
+        if (minmax != null) {
+            minVal = minmax[0];
+            maxVal = minmax[1];
+        }
+        else {
+            logger.warn("Could not read min/max distance values!");
+        }
+
+        if (name.equals(FIELD_LOCATIONS)) {
+            Element min = createItem(
+                cr,
+                new String[] {"min", new Double(minVal).toString()});
+
+            Element max = createItem(
+                cr,
+                new String[] {"max", new Double(maxVal).toString()});
+
+            return new Element[] { min, max };
+        }
+
+        return null;
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("LocationSelect.validate");
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        StateData    data = getData(flys, FIELD_LOCATIONS);
+
+        String locationStr = data != null ? (String) data.getValue() : null;
+
+        if (locationStr == null || locationStr.length() == 0) {
+            logger.error("No locations given.");
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        double[] minmax = getMinMax(artifact);
+        double[] mm     = extractLocations(locationStr);
+
+        logger.debug("Inserted min location: " + mm[0]);
+        logger.debug("Inserted max location: " + mm[mm.length-1]);
+
+        return validateBounds(minmax[0], minmax[1], mm[0], mm[mm.length-1], 0d);
+    }
+
+
+    /**
+     * This method takes a string that consist of whitespace separated double
+     * values and returns the double values as array.
+     *
+     * @param locationStr The locations inserted in this state.
+     *
+     * @return the locations as array.
+     */
+    protected double[] extractLocations(String locationStr) {
+        String[] tmp               = locationStr.split(" ");
+        TDoubleArrayList locations = new TDoubleArrayList();
+
+        for (String l: tmp) {
+            try {
+                locations.add(Double.parseDouble(l));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        locations.sort();
+
+        return locations.toNativeArray();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/OutputState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,43 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+
+
+public class OutputState extends DefaultState implements FacetTypes {
+
+    private static final Logger logger = Logger.getLogger(OutputState.class);
+
+
+    @Override
+    public Element describeStatic(
+        Artifact    artifact,
+        Document    document,
+        Node        root,
+        CallContext context,
+        String      uuid)
+    {
+        return null;
+    }
+
+
+    @Override
+    public Element describe(
+        Artifact    artifact,
+        Document    document,
+        Node        root,
+        CallContext context,
+        String      uuid)
+    {
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ProfileDistanceSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,13 @@
+package de.intevation.flys.artifacts.states;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ProfileDistanceSelect extends DefaultState {
+
+    @Override
+    protected String getUIProvider() {
+        return "auto_integer";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/RangeState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,96 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class RangeState extends DefaultState {
+
+    /** The logger that is used in this class.*/
+    private Logger logger = Logger.getLogger(RangeState.class);
+
+
+    public RangeState() {
+    }
+
+
+    protected abstract String   getLowerField();
+    protected abstract String   getUpperField();
+    protected abstract String   getStepField();
+    protected abstract double[] getMinMax(Artifact artifact);
+
+
+    /**
+     * Validates a given range with a given valid range.
+     *
+     * @param fromValid Valid lower value of the range.
+     * @param toValid Valid upper value of the range.
+     * @param from The lower value.
+     * @param to The upper value.
+     * @param step The step width.
+     *
+     * @return true, if everything was fine, otherwise an exception is thrown.
+     */
+    protected boolean validateBounds(
+        double fromValid, double toValid,
+        double from,      double to,      double step)
+    throws IllegalArgumentException
+    {
+        logger.debug("RangeState.validateRange");
+
+        if (from < fromValid) {
+            logger.error(
+                "Invalid 'from'. " + from + " is smaller than " + fromValid);
+            throw new IllegalArgumentException("error_feed_from_out_of_range");
+        }
+        else if (to > toValid) {
+            logger.error(
+                "Invalid 'to'. " + to + " is bigger than " + toValid);
+            throw new IllegalArgumentException("error_feed_to_out_of_range");
+        }
+
+        return true;
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData dFrom = getData(flys, getLowerField());
+        StateData dTo   = getData(flys, getUpperField());
+        StateData dStep = getData(flys, getStepField());
+
+        String fromStr = dFrom != null ? (String) dFrom.getValue() : null;
+        String toStr   = dTo   != null ? (String) dTo.getValue()   : null;
+        String stepStr = dStep != null ? (String) dStep.getValue() : null;
+
+        if (fromStr == null || toStr == null || stepStr == null) {
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        try {
+            double from = Double.parseDouble(fromStr);
+            double to   = Double.parseDouble(toStr);
+            double step = Double.parseDouble(stepStr);
+
+            double[] minmax = getMinMax(flys);
+
+            return validateBounds(minmax[0], minmax[1], from, to, step);
+        }
+        catch (NumberFormatException nfe) {
+            throw new IllegalArgumentException("error_invalid_double_value");
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/RiverAxisState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,82 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.context.FLYSContext;
+import de.intevation.flys.artifacts.model.WMSLayerFacet;
+import de.intevation.flys.artifacts.resources.Resources;
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+import de.intevation.flys.utils.FLYSUtils;
+import de.intevation.flys.utils.GeometryUtils;
+
+
+public class RiverAxisState extends OutputState {
+
+    public static final String I18N_DESCRIPTION = "floodmap.riveraxis";
+
+    public static final String WMS_LAYER_NAME = "riveraxis";
+
+
+
+    private static final Logger logger = Logger.getLogger(RiverAxisState.class);
+
+
+    @Override
+    public Object computeInit(
+        FLYSArtifact artifact,
+        String       hash,
+        Object       context,
+        CallMeta     meta,
+        List<Facet>  facets
+    ) {
+        logger.debug("RiverAxisState.computeInit()");
+
+        FLYSContext flysContext = null;
+
+        if (context instanceof FLYSContext) {
+            flysContext = (FLYSContext) context;
+        }
+        else {
+            flysContext = (FLYSContext) ((CallContext) context).globalContext();
+        }
+
+        Map<String, String> wms = (Map<String, String>)
+            flysContext.get(FLYSContext.RIVER_WMS);
+
+        String river = artifact.getDataAsString("river");
+
+        if(river == null || river.length() == 0) {
+            logger.warn("No river found in the current parameterization.");
+            return null;
+        }
+
+        String url = wms.get(river);
+
+        // TODO Add config for background layer
+        WMSLayerFacet facet = new WMSLayerFacet(
+            0,
+            FLOODMAP_RIVERAXIS,
+            Resources.getMsg(meta, I18N_DESCRIPTION, I18N_DESCRIPTION),
+            ComputeType.INIT,
+            getID(), hash,
+            url);
+
+        facet.addLayer(WMS_LAYER_NAME);
+        facet.setExtent(GeometryUtils.getRiverBounds(river));
+        facet.setSrid(FLYSUtils.getRiverSrid(artifact));
+
+        facets.add(facet);
+
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,163 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class RiverSelect extends DefaultState {
+
+    /** The logger used in this class. */
+    private static Logger logger = Logger.getLogger(RiverSelect.class);
+
+
+    /** Error message that is thrown if no river was found based on a given
+     * name.*/
+    public static final String ERROR_NO_SUCH_RIVER =
+        "error_feed_no_such_river";
+
+    /** Error message that is thrown if no river was found based on a given
+     * name.*/
+    public static final String ERROR_NO_RIVER_SELECTED =
+        "error_feed_no_river_selected";
+
+
+    /**
+     * The default constructor that initializes an empty State object.
+     */
+    public RiverSelect() {
+    }
+
+
+    /**
+     * Initialize the state based on the state node in the configuration.
+     *
+     * @param config The state configuration node.
+     */
+    public void setup(Node config) {
+        super.setup(config);
+    }
+
+
+    protected Element createData(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        StateData   data,
+        CallContext context)
+    {
+        Element select = ProtocolUtils.createArtNode(
+            cr, "select",
+            new String[] { "uiprovider" },
+            new String[] { "select_with_map" });
+        cr.addAttr(select, "name", data.getName(), true);
+
+        Element label = ProtocolUtils.createArtNode(
+            cr, "label", null, null);
+
+        Element choices = ProtocolUtils.createArtNode(
+            cr, "choices", null, null);
+
+        select.appendChild(label);
+
+        label.setTextContent(Resources.getMsg(
+            context.getMeta(),
+            getID(),
+            getID()));
+
+        return select;
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        List<River> rivers = RiverFactory.getRivers();
+        Element[] items    = new Element[rivers.size()];
+
+        int idx = 0;
+        for (River river: rivers) {
+            items[idx++] = createRiverItem(cr, river);
+        }
+
+        return items;
+    }
+
+
+    /**
+     * This method creates a node that represents a river item. This node
+     * contains the label and the value that describe the river.
+     *
+     * @param cr The ElementCreator.
+     * @param river The river.
+     *
+     * @return the element that contains the information about the river.
+     */
+    protected Element createRiverItem(XMLUtils.ElementCreator cr, River river) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        label.setTextContent(river.getName());
+        value.setTextContent(river.getName());
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("RiverSelect.validate");
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData dRiver = getData(flys, "river");
+
+        if (dRiver == null || dRiver.getValue() == null) {
+            throw new IllegalArgumentException(ERROR_NO_RIVER_SELECTED);
+        }
+
+        River river = RiverFactory.getRiver((String) dRiver.getValue());
+
+        if (river == null) {
+            throw new IllegalArgumentException(ERROR_NO_SUCH_RIVER);
+        }
+
+        return true;
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "river_panel";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/ScenarioSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,120 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.resources.Resources;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ScenarioSelect extends DefaultState {
+
+    /** The logger that is used in this class.*/
+    private static Logger logger = Logger.getLogger(ScenarioSelect.class);
+
+
+    public static final String FIELD_MODE     = "scenario";
+    public static final String FIELD_BARRIERS = "uesk.barriers";
+
+    public static final String SCENARIO_CURRENT   = "scenario.current";
+    public static final String SCENARIO_POTENTIEL = "scenario.potentiel";
+    public static final String SCENARIO_SCENRAIO  = "scenario.scenario";
+
+    public static final String[] SCENARIOS = {
+        SCENARIO_CURRENT,
+        SCENARIO_POTENTIEL,
+        SCENARIO_SCENRAIO };
+
+
+
+    @Override
+    protected String getUIProvider() {
+        return "map_digitize";
+    }
+
+
+    @Override
+    protected void appendStaticData(
+        FLYSArtifact   flys,
+        CallContext    cc,
+        ElementCreator creator,
+        Element        ui,
+        String         name
+    ) {
+        if (name != null && name.equals(FIELD_BARRIERS)) {
+            return;
+        }
+        else {
+            super.appendStaticData(flys, cc, creator, ui, name);
+        }
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        CallMeta meta = context.getMeta();
+
+        if (name.equals(FIELD_MODE)) {
+            Element[] scenarios = new Element[SCENARIOS.length];
+
+            int i = 0;
+
+            for (String scenario: SCENARIOS) {
+                scenarios[i++] = createItem(
+                    cr, new String[] {
+                        Resources.getMsg(meta, scenario, scenario),
+                        scenario
+                    });
+            }
+
+            return scenarios;
+        }
+        else {
+            FLYSArtifact flys = (FLYSArtifact) artifact;
+            String       data = flys.getDataAsString(name);
+
+            return new Element[] { createItem(
+                cr,
+                new String[] {
+                    Resources.getMsg(meta, name, name),
+                    data
+                }
+            )};
+        }
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/StateFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,121 @@
+package de.intevation.flys.artifacts.states;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.state.State;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class StateFactory {
+
+    /** The logger used in this class */
+    private static Logger logger = Logger.getLogger(StateFactory.class);
+
+    /** The XPath to the classname of the state */
+    public static final String XPATH_STATE = "@state";
+
+    /** The XPath to the data items of the state relative to the state node. */
+    public static final String XPATH_DATA = "data";
+
+    /** The XPath to the data name relative to the data node.*/
+    public static final String XPATH_DATA_NAME = "@name";
+
+    /** The XPath to the data type relative to the data node.*/
+    public static final String XPATH_DATA_TYPE = "@type";
+
+    /** The XPath to the data description relative to the data node.*/
+    public static final String XPATH_DATA_DESCRIPTION = "@description";
+
+
+    /**
+     * Creates a new State based on the configured class provided by
+     * <code>stateConf</code>.
+     *
+     * @param stateConf The configuration of the state.
+     *
+     * @return a State.
+     */
+    public static State createState(Node stateConf) {
+        String clazz = (String) XMLUtils.xpath(
+            stateConf, XPATH_STATE, XPathConstants.STRING);
+
+        State state = null;
+
+        try {
+            logger.debug("Create a new State for class: " + clazz);
+            state = (State) Class.forName(clazz).newInstance();
+            state.setup(stateConf);
+
+            initializeStateData(state, stateConf);
+        }
+        catch (InstantiationException ie) {
+            logger.error(ie, ie);
+        }
+        catch (IllegalAccessException iae) {
+            logger.error(iae, iae);
+        }
+        catch (ClassNotFoundException cnfe) {
+            logger.error(cnfe, cnfe);
+        }
+
+        return state;
+    }
+
+
+    /**
+     * This method extracts the configured input data of a state and adds new
+     * StateData objects to the State.
+     *
+     * @param state The state.
+     * @param stateConf The state configuration node.
+     */
+    protected static void initializeStateData(State state, Node stateConf) {
+        NodeList dataList = (NodeList) XMLUtils.xpath(
+            stateConf, XPATH_DATA, XPathConstants.NODESET);
+
+        if (dataList == null || dataList.getLength() == 0) {
+            logger.debug("The state has no input data configured.");
+
+            return;
+        }
+
+        int items = dataList.getLength();
+
+        logger.debug("The state has " + items + " data items configured.");
+
+        for (int i = 0; i < items; i++) {
+            Node data = dataList.item(i);
+
+            String name = (String) XMLUtils.xpath(
+                data, XPATH_DATA_NAME, XPathConstants.STRING);
+            String type = (String) XMLUtils.xpath(
+                data, XPATH_DATA_TYPE, XPathConstants.STRING);
+            String desc = (String) XMLUtils.xpath(
+                data, XPATH_DATA_DESCRIPTION, XPathConstants.STRING);
+
+            if (name == null || name.equals("")) {
+                logger.warn("No name for data item at pos " + i + " found.");
+                continue;
+            }
+
+            if (type == null || type.equals("")) {
+                logger.warn("No type for data item at pos " + i + " found.");
+                logger.warn("Default type 'string' used.");
+                type = "string";
+            }
+
+            state.addData(name, new DefaultStateData(name, type, desc));
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/StaticState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,22 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+
+/**
+ * Yet, a non-abstract DefaultState.
+ */
+public class StaticState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static final Logger logger = Logger.getLogger(StaticState.class);
+
+    public StaticState(String id, String description) {
+        super();
+        setID(id);
+        setDescription(description);
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WDifferencesState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,143 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.math.WKmsOperation;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WKms;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.artifacts.model.DataFacet;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+
+public class WDifferencesState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static Logger logger = Logger.getLogger(WDifferencesState.class);
+
+
+    public WDifferencesState() {
+    }
+
+
+    /** Specify to display nothing (this is kind of a "final" state). */
+    @Override
+    protected String getUIProvider() {
+        return "noinput";
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData data = flys.getData("diffids");
+
+        if (data == null) {
+            throw new IllegalArgumentException("diffids is empty");
+        }
+
+        // TODO: Also validate format.
+
+        return true;
+    }
+
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        WINFOArtifact winfo = (WINFOArtifact)artifact;
+        String id = getID();
+
+        // Load the Artifacts/facets that we want to subtract and display.
+        // Expected format is:
+        // [42537f1e-3522-42ef-8968-635b03d8e9c6;longitudinal_section.w;0]#[1231f2-....]
+        String datas[] = winfo.getDataAsString("diffids").split("#");
+
+        // Validate the Data-Strings.
+        for (String s: datas) {
+            if (!WaterlevelSelectState.isValueValid(winfo.getDataAsString("diffids"))) {
+                // TODO: escalate.
+            }
+        }
+
+        if (datas.length != 2) {
+            // TODO crash with style
+            ;
+        }
+        String uuid1 = WaterlevelSelectState.strip(datas[0]).split(";")[0];
+        String uuid2 = WaterlevelSelectState.strip(datas[1]).split(";")[0];
+
+        WINFOArtifact flys1 = (WINFOArtifact) FLYSUtils.getArtifact(
+            uuid1,
+            context);
+        WINFOArtifact flys2 = (WINFOArtifact) FLYSUtils.getArtifact(
+            uuid2,
+            context);
+
+        if (flys1 == null) {
+            logger.warn("One of the artifacts (1) for diff calculation could not be loaded");
+        }
+        if (flys2 == null) {
+            logger.warn("One of the artifacts (2) for diff calculation could not be loaded");
+        }
+        WKms wkms = null;
+        String facetName = "diff ()";
+
+        if (flys1 != null && flys2 != null) {
+            // TODO also check size.
+            // TODO also need index of wqkms.
+            WQKms[] minuend = (WQKms[]) flys1.getWaterlevelData().getData();
+            WQKms[] subtrahend = (WQKms[]) flys2.getWaterlevelData().getData();
+            wkms = WKmsOperation.SUBTRACTION.operate(minuend[0], subtrahend[0]);
+            facetName = "W ("+minuend[0].getName() + ") - W (" + subtrahend[0].getName()+")";
+            logger.warn("Did a WKMSSubtraction");
+            // Add these datasets also as facets ("absolutes").
+            /*
+            Facet minuendAbsFacet = new WaterlevelFacet(0, LONGITUDINAL_W,
+                "Minuend: W (_todo_)", ComputeType.ADVANCE, id, hash);
+            Facet subtrahendAbsFacet = new WaterlevelFacet(1, LONGITUDINAL_W,
+                "Subtrahend: W (_todo_)", ComputeType.ADVANCE, id, hash);
+            */
+            //facets.add(minuendAbsFacet);
+            //facets.add(subtrahendAbsFacet);
+        }
+
+        if (facets != null) {
+            // TODO: pass computetype and state id.
+            //, ComputeType.ADVANCE, getID(), hash));
+            facets.add(new DataFacet(W_DIFFERENCES, facetName));
+            facets.add(new DataFacet(CSV, "CSV data"));
+        }
+        else {
+            logger.debug("Not adding facets in WDifferencesState.");
+        }
+
+        return wkms;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,120 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.Config;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.WMSLayerFacet;
+import de.intevation.flys.artifacts.resources.Resources;
+import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
+
+
+public class WMSBackgroundState extends OutputState {
+
+    public static final String I18N_DESCRIPTION = "floodmap.wmsbackground";
+
+    public static final String XPATH_SRID =
+        "/artifact-database/floodmap/river[@name=$name]/srid/@value";
+
+    public static final String XPATH_WMS_URL =
+        "/artifact-database/floodmap/river[@name=$name]/background-wms/@url";
+
+    public static final String XPATH_WMS_LAYER =
+        "/artifact-database/floodmap/river[@name=$name]/background-wms/@layers";
+
+
+    protected String url;
+    protected String layer;
+    protected String srid;
+
+
+    private static final Logger logger = Logger.getLogger(WMSBackgroundState.class);
+
+
+    @Override
+    public void setup(Node config) {
+        super.setup(config);
+
+        logger.debug("WMSBackgroundState.setup()");
+    }
+
+
+    @Override
+    public Object computeInit(
+        FLYSArtifact artifact,
+        String       hash,
+        Object       context,
+        CallMeta     meta,
+        List<Facet>  facets
+    ) {
+        logger.debug("WMSBackgroundState.computeInit()");
+
+        if (url == null || layer == null) {
+            Document cfg = Config.getConfig();
+
+            String river = artifact.getDataAsString("river");
+
+            Map<String, String> variables = new HashMap<String, String>();
+            variables.put("name", river);
+
+            srid = (String) XMLUtils.xpath(
+                cfg,
+                XPATH_SRID,
+                XPathConstants.STRING,
+                null,
+                variables);
+
+            url = (String) XMLUtils.xpath(
+                cfg,
+                XPATH_WMS_URL,
+                XPathConstants.STRING,
+                null,
+                variables);
+
+            layer = (String) XMLUtils.xpath(
+                cfg,
+                XPATH_WMS_LAYER,
+                XPathConstants.STRING,
+                null,
+                variables);
+        }
+
+        if (url == null || layer == null) {
+            logger.warn("No background layers currently configured:");
+            logger.warn("... add config for WMS url: " + XPATH_WMS_URL);
+            logger.warn("... add config for WMS layer: " + XPATH_WMS_LAYER);
+            return null;
+        }
+
+        WMSLayerFacet facet = new WMSLayerFacet(
+            0,
+            FLOODMAP_WMSBACKGROUND,
+            Resources.getMsg(meta, I18N_DESCRIPTION, I18N_DESCRIPTION),
+            ComputeType.INIT,
+            getID(), hash,
+            url);
+
+        facet.addLayer(layer);
+        facet.setSrid(srid);
+
+        facets.add(facet);
+
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WQAdapted.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,456 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Comparator;
+import java.util.Collections;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.Range;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Wst;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.RangeWithValues;
+import de.intevation.flys.artifacts.model.WstFactory;
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQAdapted extends DefaultState {
+
+    /** The logger used in this state.*/
+    private static Logger logger = Logger.getLogger(WQAdapted.class);
+
+
+    public static final String FIELD_WQ_MODE = "wq_mode";
+
+    public static final String FIELD_WQ_VALUES = "wq_values";
+
+    public static final class GaugeOrder implements Comparator<Gauge> {
+        private int order;
+
+        public GaugeOrder(boolean up) {
+            order = up ? 1 : -1;
+        }
+
+        public int compare(Gauge a, Gauge b) {
+            return order * a.getRange().getA().compareTo(b.getRange().getA());
+        }
+    } // class GaugeOrder
+
+    public static final GaugeOrder GAUGE_UP   = new GaugeOrder(true);
+    public static final GaugeOrder GAUGE_DOWN = new GaugeOrder(false);
+
+    public WQAdapted() {
+    }
+
+    /**
+     * This method creates one element for each gauge of the selected river that
+     * is intersected by the given kilometer range. Each element is a tuple of
+     * (from;to) where <i>from</i> is the lower bounds of the gauge or the lower
+     * kilometer range. <i>to</i> is the upper bounds of the gauge or the upper
+     * kilometer range.
+     *
+     * @param cr The ElementCreator.
+     * @param artifact The FLYS artifact.
+     * @param name The name of the data item.
+     * @param context The CallContext.
+     *
+     * @return a list of elements that consist of tuples of the intersected
+     * gauges of the selected river.
+     */
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        logger.debug("WQAdapted.createItems");
+
+        if (name != null && name.equals(FIELD_WQ_MODE)) {
+            return createModeItems(cr, artifact, name, context);
+        }
+        else if (name != null && name.equals(FIELD_WQ_VALUES)) {
+            return createValueItems(cr, artifact, name, context);
+        }
+        else {
+            logger.warn("Unknown data object: " + name);
+            return null;
+        }
+    }
+
+
+    protected Element[] createModeItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        logger.debug("WQAdapted.createModeItems");
+
+        Element w = createItem(cr, new String[] { "w", "W" });
+        Element q = createItem(cr, new String[] { "q", "Q" });
+
+        return new Element[] { w, q };
+    }
+
+
+    protected Element[] createValueItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        logger.debug("WQAdapted.createValueItems");
+
+        WINFOArtifact flysArtifact = (WINFOArtifact) artifact;
+
+        double[]    dist   = FLYSUtils.getKmRange(flysArtifact);
+        River       river  = FLYSUtils.getRiver(flysArtifact);
+        Wst         wst    = WstFactory.getWst(river);
+        List<Gauge> gauges = flysArtifact.getGauges();
+
+        int num = gauges != null ? gauges.size() : 0;
+
+        if (num == 0) {
+            logger.warn("Selected distance matches no gauges.");
+            return null;
+        }
+
+        Element[] elements = new Element[num];
+
+        double rangeFrom = dist[0];
+        double rangeTo   = dist[1];
+
+        int idx = 0;
+
+        if (rangeFrom < rangeTo) {
+            Collections.sort(gauges, GAUGE_UP);
+            for (Gauge gauge: gauges) {
+                Range range = gauge.getRange();
+                double lower = range.getA().doubleValue();
+                double upper = range.getB().doubleValue();
+
+                double from = lower < rangeFrom ? rangeFrom : lower;
+                double to   = upper > rangeTo   ? rangeTo   : upper;
+
+                double[] mmQ = determineMinMaxQ(gauge, wst);
+                double[] mmW = gauge.determineMinMaxW();
+
+                elements[idx++] = createItem(
+                    cr, new String[] { from + ";" + to, ""}, mmQ, mmW);
+            }
+        }
+        else {
+            Collections.sort(gauges, GAUGE_DOWN);
+            rangeFrom = dist[1];
+            rangeTo   = dist[0];
+            for (Gauge gauge: gauges) {
+                Range range = gauge.getRange();
+                double lower = range.getA().doubleValue();
+                double upper = range.getB().doubleValue();
+
+                double from = lower < rangeFrom ? rangeFrom : lower;
+                double to   = upper > rangeTo   ? rangeTo   : upper;
+
+                double[] mmQ = determineMinMaxQ(gauge, wst);
+                double[] mmW = gauge.determineMinMaxW();
+
+                elements[idx++] = createItem(
+                    cr, new String[] { to + ";" + from, ""}, mmQ, mmW);
+            }
+        }
+
+        return elements;
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        return createItem(cr, obj, null, null);
+    }
+
+
+    protected Element createItem(
+        XMLUtils.ElementCreator cr,
+        Object   obj,
+        double[] q,
+        double[] w)
+    {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        if (q != null) {
+            Element qRange = createRangeElement(cr, q, "Q");
+            item.appendChild(qRange);
+        }
+
+        if (w != null) {
+            Element wRange = createRangeElement(cr, w, "W");
+            item.appendChild(wRange);
+        }
+
+        return item;
+    }
+
+
+    protected Element createRangeElement(
+        XMLUtils.ElementCreator cr,
+        double[] mm,
+        String   type)
+    {
+        Element range = ProtocolUtils.createArtNode(
+            cr, "range",
+            new String[] {"type"},
+            new String[] {type});
+
+        Element min = ProtocolUtils.createArtNode(cr, "min", null, null);
+        min.setTextContent(String.valueOf(mm[0]));
+
+        Element max = ProtocolUtils.createArtNode(cr, "max", null, null);
+        max.setTextContent(String.valueOf(mm[1]));
+
+        range.appendChild(min);
+        range.appendChild(max);
+
+        return range;
+    }
+
+
+    /**
+     * Determines the min and max Q value for the given gauge. If no min and
+     * max values could be determined, this method will return
+     * [Double.MIN_VALUE, Double.MAX_VALUE].
+     *
+     * @param gauge
+     * @param wst
+     *
+     * @return the min and max Q values for the given gauge.
+     */
+    protected double[] determineMinMaxQ(Gauge gauge, Wst wst) {
+        logger.debug("WQAdapted.determineMinMaxQ");
+
+        double[] minmaxQ = gauge != null
+            ? wst.determineMinMaxQ(gauge.getRange())
+            : null;
+
+        double minQ = minmaxQ != null ? minmaxQ[0] : Double.MIN_VALUE;
+        double maxQ = minmaxQ != null ? minmaxQ[1] : Double.MAX_VALUE;
+
+        return new double[] { minQ, maxQ };
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "wq_panel_adapted";
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("WQAdapted.validate");
+
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+        StateData    data = getData(flys, FIELD_WQ_MODE);
+
+        String mode = data != null ? (String) data.getValue() : null;
+
+        if (mode != null && mode.equals("W")) {
+            return validateW(artifact);
+        }
+        else if (mode != null && mode.equals("Q")) {
+            return validateQ(artifact);
+        }
+        else {
+            throw new IllegalArgumentException("error_feed_no_wq_mode_selected");
+        }
+    }
+
+
+    protected boolean validateW(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("WQAdapted.validateW");
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+
+        RangeWithValues[] rwvs = extractInput(getData(flys, "wq_values"));
+
+        if (rwvs == null) {
+            throw new IllegalArgumentException("error_missing_wq_data");
+        }
+
+        List<Gauge>     gauges = ((WINFOArtifact) artifact).getGauges();
+
+        for (Gauge gauge: gauges) {
+            Range range  = gauge.getRange();
+            double lower = range.getA().doubleValue();
+            double upper = range.getB().doubleValue();
+
+            for (RangeWithValues rwv: rwvs) {
+                if (lower <= rwv.getLower() && upper >= rwv.getUpper()) {
+                    compareWsWithGauge(gauge, rwv.getValues());
+                }
+            }
+        }
+
+        return true;
+    }
+
+
+    protected boolean validateQ(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("WQAdapted.validateQ");
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+
+        RangeWithValues[] rwvs = extractInput(getData(flys, "wq_values"));
+
+        if (rwvs == null) {
+            throw new IllegalArgumentException("error_missing_wq_data");
+        }
+
+        List<Gauge> gauges = flys.getGauges();
+        River        river = FLYSUtils.getRiver(flys);
+        Wst            wst = WstFactory.getWst(river);
+
+        for (Gauge gauge: gauges) {
+            Range range  = gauge.getRange();
+            double lower = range.getA().doubleValue();
+            double upper = range.getB().doubleValue();
+
+            for (RangeWithValues rwv: rwvs) {
+                if (lower <= rwv.getLower() && upper >= rwv.getUpper()) {
+                    compareQsWithGauge(wst, gauge, rwv.getValues());
+                }
+            }
+        }
+
+        return true;
+    }
+
+
+    protected boolean compareQsWithGauge(Wst wst, Gauge gauge, double[] qs)
+    throws IllegalArgumentException
+    {
+        double[] minmax = gauge != null
+            ? wst.determineMinMaxQ(gauge.getRange())
+            : null;
+
+        if (minmax == null) {
+            logger.warn("Could not determine min/max Q of gauge.");
+            return true;
+        }
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Validate Qs with:");
+            logger.debug("-- Gauge: " + gauge.getName());
+            logger.debug("-- Gauge min: " + minmax[0]);
+            logger.debug("-- Gauge max: " + minmax[1]);
+        }
+
+        for (double q: qs) {
+            if (q < minmax[0] || q > minmax[1]) {
+                throw new IllegalArgumentException(
+                    "error_feed_q_values_invalid");
+            }
+        }
+
+        return true;
+    }
+
+
+    protected boolean compareWsWithGauge(Gauge gauge, double[] ws)
+    throws IllegalArgumentException
+    {
+        double[] minmax = gauge != null
+            ? gauge.determineMinMaxW()
+            : null;
+
+        if (minmax == null) {
+            logger.warn("Could not determine min/max W of gauge.");
+            return true;
+        }
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Validate Ws with:");
+            logger.debug("-- Gauge: " + gauge.getName());
+            logger.debug("-- Gauge min: " + minmax[0]);
+            logger.debug("-- Gauge max: " + minmax[1]);
+        }
+
+        for (double w: ws) {
+            if (w < minmax[0] || w > minmax[1]) {
+                throw new IllegalArgumentException(
+                    "error_feed_w_values_invalid");
+            }
+        }
+
+        return true;
+    }
+
+
+    protected RangeWithValues[] extractInput(StateData data) {
+        if (data == null) {
+            return null;
+        }
+
+        String dataString = (String) data.getValue();
+        String[]   ranges = dataString.split(":");
+
+        List<RangeWithValues> rwv = new ArrayList<RangeWithValues>();
+
+        for (String range: ranges) {
+            String[] parts = range.split(";");
+
+            double lower = Double.parseDouble(parts[0]);
+            double upper = Double.parseDouble(parts[1]);
+
+            String[] values = parts[2].split(",");
+
+            int      num = values.length;
+            double[] res = new double[num];
+
+            for (int i = 0; i < num; i++) {
+                try {
+                    res[i] = Double.parseDouble(values[i]);
+                }
+                catch (NumberFormatException nfe) {
+                    logger.warn(nfe, nfe);
+                }
+            }
+
+            rwv.add(new RangeWithValues(lower, upper, res));
+        }
+
+        return (RangeWithValues[]) rwv.toArray(new RangeWithValues[rwv.size()]);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WQSelect.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,397 @@
+package de.intevation.flys.artifacts.states;
+
+import gnu.trove.TDoubleArrayList;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.Wst;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.WstFactory;
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQSelect extends DefaultState {
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(WQSelect.class);
+
+
+    /** The default step width for Qs.*/
+    public static final String DEFAULT_STEP_Q = "50";
+
+    /** The default step width for Qs.*/
+    public static final String DEFAULT_STEP_W = "30";
+
+    /** The name of the 'mode' field. */
+    public static final String WQ_MODE = "wq_mode";
+
+    /** The name of the 'selection' field.*/
+    public static final String WQ_SELECTION = "wq_selection";
+
+    /** The name of the 'from' field. */
+    public static final String WQ_FROM = "wq_from";
+
+    /** The name of the 'to' field. */
+    public static final String WQ_TO = "wq_to";
+
+    /** The name of the 'step' field. */
+    public static final String WQ_STEP = "wq_step";
+
+    /** The name of the 'single' field. */
+    public static final String WQ_SINGLE = "wq_single";
+
+
+    /**
+     * The default constructor that initializes an empty State object.
+     */
+    public WQSelect() {
+    }
+
+    protected Element createData(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        StateData   data,
+        CallContext context)
+    {
+        Element select = ProtocolUtils.createArtNode(
+            cr, "select", null, null);
+
+        cr.addAttr(select, "name", data.getName(), true);
+
+        Element label = ProtocolUtils.createArtNode(
+            cr, "label", null, null);
+
+        Element choices = ProtocolUtils.createArtNode(
+            cr, "choices", null, null);
+
+        label.setTextContent(Resources.getMsg(
+            context.getMeta(),
+            data.getName(),
+            data.getName()));
+
+        select.appendChild(label);
+
+        return select;
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        // TODO Insert correct min/max values!
+        double[] minmaxW = determineMinMaxW(artifact);
+        double[] minmaxQ = determineMinMaxQ(artifact);
+
+        if (name.equals("wq_from")) {
+            Element minW = createItem(
+                cr, new String[] {"minW", new Double(minmaxW[0]).toString()});
+            Element minQ = createItem(
+                cr, new String[] {"minQ", new Double(minmaxQ[0]).toString()});
+            return new Element[] { minW, minQ };
+        }
+        else if (name.equals("wq_to")) {
+            Element maxW = createItem(
+                cr, new String[] {"maxW", new Double(minmaxW[1]).toString()});
+            Element maxQ = createItem(
+                cr, new String[] {"maxQ", new Double(minmaxQ[1]).toString()});
+            return new Element[] { maxW, maxQ };
+        }
+        else {
+            Element stepW = createItem(
+                cr, new String[] {"stepW", DEFAULT_STEP_W});
+            Element stepQ = createItem(
+                cr, new String[] {"stepQ", DEFAULT_STEP_Q});
+            return new Element[] { stepW, stepQ };
+        }
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "wq_panel";
+    }
+
+
+    /**
+     * Determines the min and max W value for the current gauge. If no min and
+     * max values could be determined, this method will return
+     * [Double.MIN_VALUE, Double.MAX_VALUE].
+     *
+     * @param artifact The FLYSArtifact.
+     *
+     * @return the min and max W values for the current gauge.
+     */
+    protected double[] determineMinMaxW(Artifact artifact) {
+        logger.debug("WQSelect.determineCurrentGauge");
+
+        Gauge    gauge   = ((WINFOArtifact) artifact).getGauge();
+        double[] minmaxW = gauge != null ? gauge.determineMinMaxW() : null;
+
+        double minW = minmaxW != null ? minmaxW[0] : Double.MIN_VALUE;
+        double maxW = minmaxW != null ? minmaxW[1] : Double.MAX_VALUE;
+
+        return new double[] { minW, maxW };
+    }
+
+
+    /**
+     * Determines the min and max Q value for the current gauge. If no min and
+     * max values could be determined, this method will return
+     * [Double.MIN_VALUE, Double.MAX_VALUE].
+     *
+     * @param artifact The FLYSArtifact.
+     *
+     * @return the min and max Q values for the current gauge.
+     */
+    protected double[] determineMinMaxQ(Artifact artifact) {
+        logger.debug("WQSelect.determineMinMaxQ");
+
+        WINFOArtifact flysArtifact = (WINFOArtifact) artifact;
+
+        River river = FLYSUtils.getRiver(flysArtifact);
+        Gauge gauge = flysArtifact.getGauge();
+        Wst   wst   = WstFactory.getWst(river);
+
+        double[] minmaxQ = gauge != null
+            ? wst.determineMinMaxQ(gauge.getRange())
+            : null;
+
+        double minQ = minmaxQ != null ? minmaxQ[0] : Double.MIN_VALUE;
+        double maxQ = minmaxQ != null ? minmaxQ[1] : Double.MAX_VALUE;
+
+        return new double[] { minQ, maxQ };
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        logger.debug("WQSelect.validate");
+
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+
+        StateData data       = getData(flys, WQ_SELECTION);
+        String selectionMode = data != null ? (String) data.getValue() : null;
+
+        if (selectionMode == null || selectionMode.equals("single")) {
+            return validateSingle(artifact);
+        }
+        else {
+            return validateRange(artifact);
+        }
+    }
+
+
+    protected boolean validateBounds(
+        double fromValid, double toValid,
+        double from,      double to,      double step)
+    throws IllegalArgumentException
+    {
+        logger.debug("RangeState.validateRange");
+
+        if (from < fromValid) {
+            logger.error(
+                "Invalid 'from'. " + from + " is smaller than " + fromValid);
+            throw new IllegalArgumentException("error_feed_from_out_of_range");
+        }
+        else if (to > toValid) {
+            logger.error(
+                "Invalid 'to'. " + to + " is bigger than " + toValid);
+            throw new IllegalArgumentException("error_feed_to_out_of_range");
+        }
+
+        return true;
+    }
+
+
+    protected boolean validateSingle(Artifact artifact)
+    throws    IllegalArgumentException
+    {
+        logger.debug("WQSelect.validateSingle");
+
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+        StateData    data = getData(flys, WQ_SINGLE);
+
+        String tmp = data != null ? (String) data.getValue() : null;
+
+        if (tmp == null || tmp.length() == 0) {
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        String[] strValues = tmp.split(" ");
+        TDoubleArrayList all = new TDoubleArrayList();
+
+        for (String strValue: strValues) {
+            try {
+                all.add(Double.parseDouble(strValue));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        all.sort();
+
+        StateData dMode = getData(flys, WQ_MODE);
+        String    mode  = dMode != null ? (String) data.getValue() : null;
+
+        logger.debug("WQ Mode: " + mode);
+
+        double[] minmax = null;
+
+        if (mode != null && mode.trim().toLowerCase().equals("w")) {
+            minmax = determineMinMaxW(artifact);
+        }
+        else {
+            minmax = determineMinMaxQ(artifact);
+        }
+
+        double min = all.get(0);
+        double max = all.get(all.size()-1);
+
+        logger.debug("Inserted min value = " + min);
+        logger.debug("Inserted max value = " + max);
+
+        return validateBounds(minmax[0], minmax[1], min, max, 0d);
+    }
+
+
+    protected boolean validateRange(Artifact artifact)
+    throws    IllegalArgumentException
+    {
+        logger.debug("WQSelect.validateRange");
+        WINFOArtifact flys = (WINFOArtifact) artifact;
+
+        StateData data = flys.getData(WQ_MODE);
+        String    mode = data != null ? (String) data.getValue() : null;
+        logger.debug("WQ Mode: " + mode);
+
+        if (mode == null || mode.length() == 0) {
+            throw new IllegalArgumentException("error_feed_invalid_wq_mode");
+        }
+
+        StateData dFrom = flys.getData(WQ_FROM);
+        StateData dTo   = flys.getData(WQ_TO);
+        StateData dStep = flys.getData(WQ_STEP);
+
+        String fromStr = dFrom != null ? (String) dFrom.getValue() : null;
+        String toStr   = dTo != null ? (String) dTo.getValue() : null;
+        String stepStr = dStep != null ? (String) dStep.getValue() : null;
+
+        if (fromStr == null || toStr == null || stepStr == null) {
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        try {
+            double from = Double.parseDouble(fromStr);
+            double to   = Double.parseDouble(toStr);
+            double step = Double.parseDouble(stepStr);
+
+            if (mode != null && mode.trim().toLowerCase().equals("w")) {
+                return validateW(artifact, from, to, step);
+            }
+            else if (mode != null && mode.trim().toLowerCase().equals("q")) {
+                return validateQ(artifact, from, to, step);
+            }
+            else {
+                throw new IllegalArgumentException(
+                    "error_feed_invalid_wq_mode");
+            }
+        }
+        catch (NumberFormatException nfe) {
+            throw new IllegalArgumentException("error_feed_number_format");
+        }
+    }
+
+
+    /**
+     * Validates the inserted W values.
+     *
+     * @param artifact The owner artifact.
+     * @param from The lower value of the W range.
+     * @param to The upper value of the W range.
+     * @param step The step width.
+     *
+     * @return true, if everything was fine, otherwise an exception is thrown.
+     */
+    protected boolean validateW(
+        Artifact    artifact,
+        double from,
+        double to,
+        double step)
+    throws    IllegalArgumentException
+    {
+        logger.debug("WQSelect.validateW");
+
+        double[] minmaxW = determineMinMaxW(artifact);
+
+        return validateBounds(minmaxW[0], minmaxW[1], from, to, step);
+    }
+
+
+    /**
+     * Validates the inserted Q values.
+     *
+     * @param artifact The owner artifact.
+     * @param from The lower value of the Q range.
+     * @param to The upper value of the Q range.
+     * @param step The step width.
+     *
+     * @return true, if everything was fine, otherwise an exception is thrown.
+     */
+    protected boolean validateQ(
+        Artifact    artifact,
+        double from,
+        double to,
+        double step)
+    throws    IllegalArgumentException
+    {
+        logger.debug("WQSelect.validateQ");
+
+        double[] minmaxQ = determineMinMaxQ(artifact);
+
+        return validateBounds(minmaxQ[0], minmaxQ[1], from, to, step);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WaterlevelGroundDifferences.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,126 @@
+package de.intevation.flys.artifacts.states;
+
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.ProtocolUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WaterlevelGroundDifferences extends RangeState {
+
+    public static final String LOWER_FIELD  = "diff_from";
+    public static final String UPPER_FIELD  = "diff_to";
+    public static final String DIFF_FIELD   = "diff_diff";
+
+    public static final double DEFAULT_STEP = 0d;
+
+
+    private static Logger logger =
+        Logger.getLogger(WaterlevelGroundDifferences.class);
+
+
+
+    @Override
+    protected String getLowerField() {
+        return LOWER_FIELD;
+    }
+
+
+    @Override
+    protected String getUpperField() {
+        return UPPER_FIELD;
+    }
+
+
+    @Override
+    protected String getStepField() {
+        return DIFF_FIELD;
+    }
+
+
+    @Override
+    protected double[] getMinMax(Artifact artifact) {
+        return new double[] { -Double.MAX_VALUE, Double.MAX_VALUE };
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "waterlevel_ground_panel";
+    }
+
+
+    protected double getDefaultStep() {
+        return DEFAULT_STEP;
+    }
+
+
+    @Override
+    protected Element[] createItems(
+        XMLUtils.ElementCreator cr,
+        Artifact    artifact,
+        String      name,
+        CallContext context)
+    {
+        double[] minmax = getMinMax(artifact);
+
+        double minVal = Double.MIN_VALUE;
+        double maxVal = Double.MAX_VALUE;
+
+        if (minmax != null) {
+            minVal = minmax[0];
+            maxVal = minmax[1];
+        }
+        else {
+            logger.warn("Could not read min/max distance values!");
+        }
+
+        if (name.equals(LOWER_FIELD)) {
+            Element min = createItem(
+                cr,
+                new String[] {"min", new Double(minVal).toString()});
+
+            return new Element[] { min };
+        }
+        else if (name.equals(UPPER_FIELD)) {
+            Element max = createItem(
+                cr,
+                new String[] {"max", new Double(maxVal).toString()});
+
+            return new Element[] { max };
+        }
+        else {
+            Element step = createItem(
+                cr,
+                new String[] {"step", String.valueOf(getDefaultStep())});
+            return new Element[] { step };
+        }
+    }
+
+
+    protected Element createItem(XMLUtils.ElementCreator cr, Object obj) {
+        Element item  = ProtocolUtils.createArtNode(cr, "item", null, null);
+        Element label = ProtocolUtils.createArtNode(cr, "label", null, null);
+        Element value = ProtocolUtils.createArtNode(cr, "value", null, null);
+
+        String[] arr = (String[]) obj;
+
+        label.setTextContent(arr[0]);
+        value.setTextContent(arr[1]);
+
+        item.appendChild(label);
+        item.appendChild(value);
+
+        return item;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WaterlevelPairSelectState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,47 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+
+
+public class WaterlevelPairSelectState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static Logger logger = Logger.getLogger(WaterlevelPairSelectState.class);
+
+    public WaterlevelPairSelectState() {
+    }
+
+
+    /** Specify to display a datacage_twin_panel. */
+    @Override
+    protected String getUIProvider() {
+        return "datacage_twin_panel";
+    }
+
+
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        //Get data and do stuff, do not calculate
+        //JSONObject jsonObject = new JSONObject().accumulate("string", 2.0f);
+        return "";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WaterlevelSelectState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,185 @@
+package de.intevation.flys.artifacts.states;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.data.DefaultStateData;
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.resources.Resources;
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WaterlevelSelectState extends DefaultState {
+
+    private static final Logger logger =
+        Logger.getLogger(WaterlevelSelectState.class);
+
+    public static final String SPLIT_CHAR = ";";
+
+    public static final String WINFO_WSP_STATE_ID = "state.winfo.waterlevel";
+
+    public static final String I18N_STATIC_KEY = "wsp.selected.string";
+
+
+    @Override
+    protected String getUIProvider() {
+        return "wsp_datacage_panel";
+    }
+
+
+    @Override
+    public StateData transform(
+        FLYSArtifact flys,
+        CallContext  cc,
+        String       name,
+        String       val
+    ) {
+        if (!isValueValid(val)) {
+            logger.error("The given input string is not valid: '" + val + "'");
+            return null;
+        }
+
+        return new DefaultStateData(name, null, null, strip(val));
+    }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData data = flys.getData("wsp");
+
+        if (data == null) {
+            throw new IllegalArgumentException("WSP is empty");
+        }
+
+        return true;
+    }
+
+
+    @Override
+    protected Element createStaticData(
+        ElementCreator creator,
+        CallContext    cc,
+        String         name,
+        String         value,
+        String         type
+    ) {
+        Element dataElement = creator.create("data");
+        creator.addAttr(dataElement, "name", name, true);
+        creator.addAttr(dataElement, "type", type, true);
+
+        Element itemElement = creator.create("item");
+        creator.addAttr(itemElement, "value", value, true);
+
+        String[] labels = getLabels(cc, value);
+        Object[] obj    = new Object[] { labels[0] };
+
+        String attrValue = Resources.getMsg(
+            cc.getMeta(), I18N_STATIC_KEY, I18N_STATIC_KEY, obj);
+
+        creator.addAttr(itemElement, "label", attrValue, true);
+        dataElement.appendChild(itemElement);
+
+        return dataElement;
+    }
+
+
+    public static String[] getLabels(CallContext cc, String value) {
+        String[] parts = value.split(SPLIT_CHAR);
+
+        FLYSArtifact artifact = FLYSUtils.getArtifact(parts[0], cc);
+
+        CalculationResult rawData = (CalculationResult) artifact.compute(
+            cc,
+            null,
+            WINFO_WSP_STATE_ID,
+            ComputeType.ADVANCE,
+            false);
+
+        WQKms[] wqkms = (WQKms[]) rawData.getData();
+
+        int idx = -1;
+        try {
+            idx = Integer.parseInt(parts[2]);
+        }
+        catch (NumberFormatException nfe) { /* do nothing */ }
+
+        return new String[] { wqkms[idx].getName() };
+    }
+
+
+    public static String strip(String value) {
+        int start = value.indexOf("[");
+        int end   = value.indexOf("]");
+
+        if (start < 0 || end < 0) {
+            return value;
+        }
+
+        value = value.substring(start+1, end);
+
+        return value;
+    }
+
+
+    /**
+     * Validates the given String. A valid string for this state requires the
+     * format: "UUID;FACETNAME;FACETINDEX".
+     *
+     * @param value The string value requires validation.
+     *
+     * @return true, if the string applies the specified format, otherwise
+     * false.
+     */
+    public static boolean isValueValid(String value) {
+        logger.debug("Validate string: '" + value + "'");
+
+        value = strip(value);
+
+        logger.debug("Validate substring: '" + value + "'");
+
+        if (value == null || value.length() == 0) {
+            return false;
+        }
+
+        String[] parts = value.split(SPLIT_CHAR);
+
+        if (parts == null || parts.length < 3) {
+            return false;
+        }
+
+        if (parts[0] == null || parts[0].length() == 0) {
+            return false;
+        }
+
+        if (parts[1] == null || parts[1].length() == 0) {
+            return false;
+        }
+
+        try {
+            Integer.parseInt(parts[2]);
+        }
+        catch (NumberFormatException nfe) {
+            logger.error("Index is not a valid integer!", nfe);
+        }
+
+        return true;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WaterlevelState.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,133 @@
+package de.intevation.flys.artifacts.states;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.ReportFacet;
+import de.intevation.flys.artifacts.model.WaterlevelFacet;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.artifacts.model.DataFacet;
+import de.intevation.flys.artifacts.model.CrossSectionFacet;
+import de.intevation.flys.artifacts.model.CrossSectionWaterLineFacet;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+
+public class WaterlevelState
+extends      DefaultState
+implements   FacetTypes
+{
+    /** The logger that is used in this state. */
+    private static Logger logger = Logger.getLogger(WaterlevelState.class);
+
+
+    @Override
+    protected String getUIProvider() {
+        return "continue";
+    }
+
+
+    protected Object compute(
+        WINFOArtifact winfo,
+        String        hash,
+        List<Facet>   facets,
+        Object        old
+    ) {
+        String id = getID();
+
+        CalculationResult res = old instanceof CalculationResult
+            ? (CalculationResult)old
+            : winfo.getWaterlevelData();
+
+        if (facets == null) {
+            return res;
+        }
+
+        WQKms [] wqkms = (WQKms [])res.getData();
+
+        for (int i = 0; i < wqkms.length; i++) {
+            String nameW = null;
+            String nameQ = null;
+
+            if (winfo.isQ()) {
+                nameQ = wqkms[i].getName();
+                nameW = "W(" + nameQ + ")";
+            }
+            else {
+                nameW = wqkms[i].getName();
+                nameQ = "Q(" + nameQ + ")";
+            }
+
+            logger.debug("Create facet: " + nameW);
+            logger.debug("Create facet: " + nameQ);
+
+            Facet w = new WaterlevelFacet(
+                i, LONGITUDINAL_W, nameW, ComputeType.ADVANCE, id, hash);
+            Facet q = new WaterlevelFacet(
+                i, LONGITUDINAL_Q, nameQ, ComputeType.ADVANCE, id, hash);
+
+            facets.add(w);
+            facets.add(q);
+        }
+
+        if (wqkms.length > 0) {
+            Facet wst = new DataFacet(
+                WST, "WST data", ComputeType.ADVANCE, hash, id);
+            Facet csv = new DataFacet(
+                CSV, "CSV data", ComputeType.ADVANCE, hash, id);
+
+            facets.add(wst);
+            facets.add(csv);
+        }
+
+        if (res.getReport().hasProblems()) {
+            facets.add(new ReportFacet(ComputeType.ADVANCE, hash, id));
+        }
+
+        // Also register the CrossSectionFacet (added to respective out).
+        facets.add(new CrossSectionFacet(winfo.getCrossSectionName()));
+        // Assume to be in wq_single mode.
+        facets.add(new CrossSectionWaterLineFacet("Q=" + winfo.getDataAsString("wq_single")));
+        return res;
+    }
+
+
+    /**
+     * @param context Ignored.
+     */
+    @Override
+    public Object computeFeed(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        return compute((WINFOArtifact) artifact, hash, facets, old);
+
+    }
+
+
+    /**
+     * @param context Ignored.
+     */
+    @Override
+    public Object computeAdvance(
+        FLYSArtifact artifact,
+        String       hash,
+        CallContext  context,
+        List<Facet>  facets,
+        Object       old
+    ) {
+        return compute((WINFOArtifact) artifact, hash, facets, old);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/DefaultTransition.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,104 @@
+package de.intevation.flys.artifacts.transitions;
+
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.State;
+import de.intevation.artifactdatabase.transition.Transition;
+
+
+/**
+ * The default implementation of a <code>Transition</code>.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DefaultTransition implements Transition {
+
+    /** The ID of the current state */
+    protected String from;
+
+    /** The ID of the target state */
+    protected String to;
+
+
+    /**
+     * The default constructor.
+     */
+    public DefaultTransition() {
+    }
+
+
+    /**
+     * The default constructor.
+     *
+     * @param from The current state.
+     * @param to The target state.
+     */
+    public DefaultTransition(String from, String to) {
+        this.from = from;
+        this.to   = to;
+    }
+
+
+    public void init(Node config) {
+        // nothing to do in the default transition
+    }
+
+
+    /**
+     * Returns the current state ID.
+     *
+     * @return the current state ID.
+     */
+    public String getFrom() {
+        return from;
+    }
+
+
+    /**
+     * Returns the target state ID.
+     *
+     * @return the target state ID.
+     */
+    public String getTo() {
+        return to;
+    }
+
+
+    /**
+     * Set the current state ID.
+     *
+     * @param to the current state ID.
+     */
+    public void setFrom(String from) {
+        this.from = from;
+    }
+
+
+    /**
+     * Set the target state ID.
+     *
+     * @param to the target state ID.
+     */
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+
+    /**
+     * Determines if its valid to step from state <i>a</i> of an artifact
+     * <i>artifact</i> to state <i>b</i>. This method always returns true - no
+     * validation takes place.
+     *
+     * @param artifact The owner artifact of state a and b.
+     * @param a The current state.
+     * @param b The target state.
+     *
+     * @return true, if it is valid to step from a to b, otherwise false.
+     */
+    public boolean isValid(Artifact artifact, State a, State b) {
+        return true;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/TransitionFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,71 @@
+package de.intevation.flys.artifacts.transitions;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Node;
+
+import de.intevation.artifactdatabase.transition.Transition;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class TransitionFactory {
+
+    /** The logger used in this class */
+    private static Logger logger = Logger.getLogger(TransitionFactory.class);
+
+    /** The XPath to the classname of the transition */
+    public static final String XPATH_TRANSITION = "@transition";
+
+    /** The XPath to the current state ID */
+    public static final String XPATH_CURRENT_STATE = "from/@state";
+
+    /** The XPath to the target state ID */
+    public static final String XPATH_TARGET_STATE = "to/@state";
+
+
+    /**
+     * Creates a new Transition based on the configured class provided by
+     * <code>transitionConf</code>.
+     *
+     * @param transitionConf The configuration of the transition.
+     *
+     * @return a Transition.
+     */
+    public static Transition createTransition(Node transitionConf) {
+        String clazz = (String) XMLUtils.xpath(
+            transitionConf, XPATH_TRANSITION, XPathConstants.STRING);
+
+        Transition transition = null;
+
+        try {
+            transition = (Transition) Class.forName(clazz).newInstance();
+
+            String from = (String) XMLUtils.xpath(
+                transitionConf, XPATH_CURRENT_STATE, XPathConstants.STRING);
+            String to = (String) XMLUtils.xpath(
+                transitionConf, XPATH_TARGET_STATE, XPathConstants.STRING);
+
+            transition.init(transitionConf);
+            transition.setFrom(from);
+            transition.setTo(to);
+        }
+        catch (InstantiationException ie) {
+            logger.error(ie, ie);
+        }
+        catch (IllegalAccessException iae) {
+            logger.error(iae, iae);
+        }
+        catch (ClassNotFoundException cnfe) {
+            logger.error(cnfe, cnfe);
+        }
+
+        return transition;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/ValueCompareTransition.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,118 @@
+package de.intevation.flys.artifacts.transitions;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.data.StateData;
+import de.intevation.artifactdatabase.state.State;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+
+/**
+ * This transition compares data objects with a <i>equal</i> or <i>notequal</i>
+ * operator.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ValueCompareTransition extends DefaultTransition {
+
+    /** The logger that is used in this transition.*/
+    private static Logger log = Logger.getLogger(ValueCompareTransition.class);
+
+
+    /** XPath that points to the condition's operator.*/
+    public static final String XPATH_OPERATOR = "condition/@operator";
+
+    /** XPath that points to the condition's value.*/
+    public static final String XPATH_VALUE    = "condition/@value";
+
+    /** XPath that points  to the condition's dataname.*/
+    public static final String XPATH_DATANAME = "condition/@data";
+
+    /** The value of the 'equal' operator.*/
+    public static final String OPERATOR_EQUAL = "equal";
+
+    /** The value of the 'not equal' operator.*/
+    public static final String OPERATOR_NOTEQUAL = "notequal";
+
+
+    /** The operator.*/
+    protected String operator;
+
+    /** The value used for comparison.*/
+    protected String value;
+
+    /** The name of the data used for the comparison.*/
+    protected String dataname;
+
+
+
+    public ValueCompareTransition() {
+    }
+
+
+    public ValueCompareTransition(String from, String to) {
+        super(from, to);
+    }
+
+
+    @Override
+    public void init(Node config) {
+        log.debug("ValueCompareTransition.init");
+
+        String tmp = (String) XMLUtils.xpath(
+            config,
+            XPATH_OPERATOR,
+            XPathConstants.STRING);
+        operator = tmp.trim().toLowerCase();
+
+        value = (String) XMLUtils.xpath(
+            config,
+            XPATH_VALUE,
+            XPathConstants.STRING);
+
+        dataname = (String) XMLUtils.xpath(
+            config,
+            XPATH_DATANAME,
+            XPathConstants.STRING);
+    }
+
+
+    @Override
+    public boolean isValid(Artifact artifact, State a, State b) {
+        log.debug("ValueCompareTransition.isValid");
+
+        FLYSArtifact flysArtifact = (FLYSArtifact) artifact;
+
+        StateData dataObj = flysArtifact.getData(dataname);
+        String    dataVal = dataObj != null ? (String) dataObj.getValue() : "";
+
+        if (log.isDebugEnabled()) {
+            log.debug("Compare settings:");
+            log.debug("-- dataname: " + dataname);
+            log.debug("-- operator: " + operator);
+            log.debug("-- compare value: " + value);
+            log.debug("-- state value: " + dataVal);
+        }
+
+        if (operator.equals(OPERATOR_EQUAL)) {
+            return value.equals(dataVal);
+        }
+        else if (operator.equals(OPERATOR_NOTEQUAL)) {
+            return !(value.equals(dataVal));
+        }
+
+        log.error("Wrong operator set! No comparison takes place.");
+
+        return false;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeParser.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,113 @@
+package de.intevation.flys.collections;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+
+import de.intevation.artifactdatabase.state.DefaultOutput;
+import de.intevation.artifactdatabase.state.Output;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.model.ManagedFacet;
+import de.intevation.flys.artifacts.model.ManagedDomFacet;
+
+
+public class AttributeParser {
+
+    /** Constant XPath that points to the outputmodes of an artifact.*/
+    public static final String XPATH_ARTIFACT_OUTPUTMODES =
+        "/art:attribute/art:outputs/art:output";
+
+
+    private static Logger logger = Logger.getLogger(AttributeParser.class);
+
+
+    protected Map<String, Output> outs;
+
+
+    public AttributeParser() {
+        this.outs = new HashMap<String, Output>();
+    }
+
+
+    public void parse(Document doc) {
+        logger.debug("AttributeParser.parse");
+
+        NodeList outs = (NodeList) XMLUtils.xpath(
+            doc,
+            XPATH_ARTIFACT_OUTPUTMODES,
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        int num = outs != null ? outs.getLength() : 0;
+
+        logger.debug("Attribute has " + num + " outputs.");
+
+        for (int i = 0; i < num; i++) {
+            Node out = outs.item(i);
+
+            parseOutput(out);
+        }
+    }
+
+
+    public Map<String, Output> getOuts() {
+        return outs;
+    }
+
+
+    protected void addItem(String out, ManagedFacet item) {
+        Output o = outs.get(out);
+
+        if (o != null) {
+            o.addFacet(item);
+        }
+    }
+
+
+    protected void parseOutput(Node out) {
+        String name = XMLUtils.xpathString(
+            out, "@name", ArtifactNamespaceContext.INSTANCE);
+
+        if (outs.get(name) == null) {
+            logger.debug("Create new output: " + name);
+
+            Output o = new DefaultOutput(name, null, null);
+            outs.put(name, o);
+        }
+
+        parseItems(out, name);
+    }
+
+
+    protected void parseItems(Node out, String outname) {
+        NodeList themes = (NodeList) XMLUtils.xpath(
+            out, "art:facet",
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        int num = themes != null ? themes.getLength() : 0;
+
+        logger.debug("Output has " + num + " themes.");
+
+        String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+        for (int i = 0; i < num; i++) {
+            Element theme = (Element) themes.item(i);
+
+            addItem(outname, new ManagedDomFacet(theme));
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,149 @@
+package de.intevation.flys.collections;
+
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.flys.artifacts.model.ManagedFacet;
+
+
+public class AttributeWriter {
+
+    protected Map<String, Output> oldAttr;
+    protected Map<String, Output> newAttr;
+
+    private static Logger logger = Logger.getLogger(AttributeWriter.class);
+
+
+    public AttributeWriter(
+        Map<String, Output> oldAttr,
+        Map<String, Output> newAttr)
+    {
+        this.oldAttr = oldAttr;
+        this.newAttr = newAttr;
+    }
+
+
+    protected Document write() {
+        Document doc = XMLUtils.newDocument();
+
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element attribute = cr.create("attribute");
+        Element outs      = cr.create("outputs");
+
+        attribute.appendChild(outs);
+        doc.appendChild(attribute);
+
+        for (String outName: newAttr.keySet()) {
+
+            Output a = newAttr.get(outName);
+            Output b = oldAttr.get(outName);
+
+            writeOutput(doc, outs, cr, a, b);
+        }
+
+        return doc;
+    }
+
+
+    protected void writeOutput(
+        Document       doc,
+        Node           outs,
+        ElementCreator cr,
+        Output         a, /* new output */
+        Output         b) /* old output */
+    {
+        Element output = cr.create("output");
+        cr.addAttr(output, "name", a.getName());
+
+        outs.appendChild(output);
+
+        List<Facet> facetsA = a.getFacets();
+        List<Facet> facetsB = null;
+
+        if (b != null) {
+            facetsB = b.getFacets();
+        }
+
+        writeFacets(doc, cr, output, facetsA, facetsB);
+    }
+
+
+    protected void writeFacets(
+        Document       doc,
+        ElementCreator cr,
+        Element        output,
+        List<Facet>    a, /* new facets */
+        List<Facet>    b) /* old facets */
+    {
+        int num = a.size();
+
+        for (int i = 0; i < num; i++) {
+            ManagedFacet fA = (ManagedFacet) a.get(i);
+
+            if (!mergeFacets(doc, cr, output, fA, b)) {
+                Node n = fA.toXML(doc);
+
+                if (n != null) {
+                    output.appendChild(n);
+                }
+            }
+        }
+    }
+
+
+    protected boolean mergeFacets(
+        Document       doc,
+        ElementCreator cr,
+        Element        output,
+        ManagedFacet   a,    /* new facets */
+        List<Facet>    list) /* old facets */
+    {
+        String nameA = a.getName() + a.getIndex();
+
+        if (list == null) {
+            logger.debug("No old facets found.");
+            return false;
+        }
+
+        for (Facet facet: list) {
+            String nameB = facet.getName() + facet.getIndex();
+
+            if (nameA.equals(nameB)) {
+                ManagedFacet b = (ManagedFacet) facet;
+
+                if (!b.getArtifact().equals(a.getArtifact())) {
+                    continue;
+                }
+
+                Node n = facet.toXML(doc);
+
+                if (n != null) {
+                    output.appendChild(n);
+                }
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/collections/FLYSArtifactCollection.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,828 @@
+package de.intevation.flys.collections;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifacts.common.utils.ClientProtocolUtils;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.Backend;
+import de.intevation.artifactdatabase.Backend.PersistentArtifact;
+import de.intevation.artifactdatabase.DefaultArtifactCollection;
+
+import de.intevation.flys.artifacts.context.FLYSContext;
+import de.intevation.flys.artifacts.model.ManagedFacet;
+import de.intevation.flys.exports.OutGenerator;
+import de.intevation.flys.themes.Theme;
+import de.intevation.flys.themes.ThemeFactory;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class FLYSArtifactCollection extends DefaultArtifactCollection {
+
+    /** The logger used in this class. */
+    private static Logger log = Logger.getLogger(FLYSArtifactCollection.class);
+
+
+    /** Constant XPath that points to the outputmodes of an artifact. */
+    public static final String XPATH_ARTIFACT_OUTPUTMODES =
+        "/art:result/art:outputmodes";
+
+    public static final String XPATH_COLLECTION_ITEMS =
+        "/art:result/art:artifact-collection/art:collection-item";
+
+    public static final String XPATH_OUT_NAME = "/art:action/@art:name";
+
+    public static final String XPATH_OUT_TYPE = "/art:action/@art:type";
+
+    public static final String XPATH_LOADED_RECOMMENDATIONS =
+        "/art:attribute/art:loaded-recommendations";
+
+
+
+    @Override
+    public Document describe(CallContext context) {
+        log.debug("FLYSArtifactCollection.describe: " + identifier);
+
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Date creationTime = getCreationTime();
+        String creation   = creationTime != null
+            ? Long.toString(creationTime.getTime())
+            : "";
+
+        Element collection = ec.create("artifact-collection");
+        Element artifacts  = ec.create("artifacts");
+
+        ec.addAttr(collection, "name", getName(), true);
+        ec.addAttr(collection, "uuid", identifier(), true);
+        ec.addAttr(collection, "creation", creation,  true);
+        ec.addAttr(collection, "ttl", String.valueOf(getTTL()), true);
+
+        collection.appendChild(artifacts);
+        doc.appendChild(collection);
+
+        ArtifactDatabase db = context.getDatabase();
+        Document oldAttrs   = getAttribute();
+
+        try {
+            String[] aUUIDs = getArtifactUUIDs(context);
+            Node newAttr    = mergeAttributes(db, context, oldAttrs, aUUIDs);
+
+            collection.appendChild(doc.importNode(newAttr, true));
+
+            if (aUUIDs != null) {
+                for (String uuid: aUUIDs) {
+                    try {
+                        artifacts.appendChild(
+                            buildArtifactNode(db, uuid, context, ec));
+                    }
+                    catch (ArtifactDatabaseException dbe) {
+                        log.warn(dbe, dbe);
+                    }
+                }
+            }
+        }
+        catch (ArtifactDatabaseException ade) {
+            log.error(ade, ade);
+
+            collection.appendChild(
+                doc.importNode(oldAttrs.getFirstChild(), true));
+        }
+
+        return doc;
+    }
+
+
+    /**
+     * Merge the current art:outputs nodes with the the outputs provided by the
+     * artifacts in the Collection.
+     */
+    protected Node mergeAttributes(
+        ArtifactDatabase db,
+        CallContext      context,
+        Document         oldAttrs,
+        String[]         uuids)
+    {
+        Document doc = buildOutAttributes(db, context, oldAttrs, uuids);
+        Node newAttr = doc.getFirstChild();
+
+        newAttr = mergeLoadedRecommendations(oldAttrs, newAttr);
+
+        try {
+            // Save the merged document into database.
+            db.setCollectionAttribute(identifier(), context.getMeta(), doc);
+        }
+        catch (ArtifactDatabaseException adb) {
+            log.error(adb, adb);
+        }
+
+        return newAttr;
+    }
+
+
+    /**
+     * Merge the recommendations which have already been loaded from the old
+     * attribute document into the new attribute document. This is necessary,
+     * because mergeAttributes() only merges the art:outputs nodes - all
+     * other nodes are skiped.
+     */
+    protected Node mergeLoadedRecommendations(Document oldAttrs, Node newAttrs){
+        Element loadedRecoms = (Element) XMLUtils.xpath(
+            oldAttrs,
+            XPATH_LOADED_RECOMMENDATIONS,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (loadedRecoms != null) {
+            Document doc = newAttrs.getOwnerDocument();
+            newAttrs.appendChild(doc.importNode(loadedRecoms, true));
+        }
+
+        return newAttrs;
+    }
+
+
+    @Override
+    public void out(
+        String       type,
+        Document     format,
+        OutputStream out,
+        CallContext  context)
+    throws IOException
+    {
+        log.info("FLYSArtifactCollection.out");
+
+        String name = XMLUtils.xpathString(
+            format, XPATH_OUT_NAME, ArtifactNamespaceContext.INSTANCE);
+
+        String subtype = XMLUtils.xpathString(
+            format, XPATH_OUT_TYPE, ArtifactNamespaceContext.INSTANCE);
+
+        log.info("-> Output name = " + name);
+        log.info("-> Output type = " + type);
+        log.info("-> Output subtype = " + subtype);
+
+        OutGenerator generator = null;
+        if (type != null && type.length() > 0) {
+            if (type.indexOf("chartinfo") > 0) {
+                generator = getOutGenerator(context, type, subtype);
+            }
+            else {
+                generator = getOutGenerator(context, name, subtype);
+            }
+        }
+        else {
+            generator = getOutGenerator(context, name, subtype);
+        }
+
+        if (generator == null) {
+            log.error("There is no generator specified for output: " + name);
+            // TODO Throw an exception.
+
+            return;
+        }
+
+        generator.init(format, out, context);
+
+        // TODO Determine the correct master artifact here!
+
+        try {
+            Document attr = getAttribute(context, name);
+            doOut(generator, name, subtype, attr, context);
+        }
+        catch (ArtifactDatabaseException adbe) {
+            log.error(adbe, adbe);
+        }
+    }
+
+
+    /**
+     * Creates the concrete output.
+     *
+     * @param generator The OutGenerator that creates the output.
+     * @param outputName The name of the requested output.
+     * @param attributes The collection's attributes for this concrete output
+     * type.
+     * @param context The context object.
+     */
+    protected void doOut(
+        OutGenerator generator,
+        String       outName,
+        String       facet,
+        Document     attributes,
+        CallContext  context)
+    throws IOException
+    {
+        log.info("FLYSArtifactCollection.doOut: " + outName);
+
+        ThemeList themeList = new ThemeList(attributes);
+
+        int size = themeList.size();
+        log.debug("Output will contain " + size + " elements.");
+
+        try {
+            for (int i = 0; i < size; i++) {
+                ManagedFacet theme = themeList.get(i);
+
+                if (theme == null) {
+                    log.debug("Theme is empty - no output is generated.");
+                    continue;
+                }
+
+                String art = theme.getArtifact();
+
+                if (log.isDebugEnabled()) {
+                    log.debug("Do output for...");
+                    log.debug("... artifact: " + art);
+                    log.debug("... facet: " + theme.getName());
+                }
+
+                String facetName = theme.getName();
+
+                if (outName.equals("export") && !facetName.equals(facet)) {
+                    continue;
+                }
+
+                Artifact artifact = getArtifact(art, context);
+                if (i == 0) {
+                    generator.setMasterArtifact(artifact);
+                }
+
+                if (theme.getActive() == 0) {
+                    continue;
+                }
+
+                generator.doOut(
+                    artifact,
+                    theme,
+                    getFacetThemeFromAttribute(
+                        art,
+                        outName,
+                        facetName,
+                        context));
+            }
+        }
+        catch (ArtifactDatabaseException ade) {
+            log.error(ade, ade);
+        }
+
+        generator.generate();
+    }
+
+
+    protected Document buildOutAttributes(
+        ArtifactDatabase db,
+        CallContext      context,
+        Document         oldAttr,
+        String[]         items)
+    {
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        AttributeParser aParser = new AttributeParser();
+        OutputParser    oParser = new OutputParser(db, context);
+
+        if (items != null) {
+            for (String uuid: items) {
+                try {
+                    oParser.parse(uuid);
+                }
+                catch (ArtifactDatabaseException ade) {
+                    log.warn(ade, ade);
+                }
+            }
+        }
+
+        aParser.parse(oldAttr);
+
+        return new AttributeWriter(aParser.getOuts(), oParser.getOuts()).write();
+    }
+
+
+    /**
+     * Returns the attribute for a specific output type.
+     *
+     * @param output The name of the desired output type.
+     *
+     * @return the attribute for the desired output type.
+     */
+    protected Document getAttribute(CallContext context, String output)
+    throws    ArtifactDatabaseException
+    {
+        Document attr = buildOutAttributes(
+            context.getDatabase(),
+            context,
+            getAttribute(),
+            getArtifactUUIDs(context));
+
+        Node out = (Node) XMLUtils.xpath(
+            attr,
+            "art:attribute/art:outputs/art:output[@name='" + output + "']",
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+
+        if (out != null) {
+            Document o = XMLUtils.newDocument();
+
+            o.appendChild(o.importNode(out, true));
+
+            return o;
+        }
+
+        return null;
+    }
+
+
+    /**
+     * This method returns the list of artifact UUIDs that this collections
+     * contains.
+     *
+     * @param context The CallContext that is necessary to get information about
+     * the ArtifactDatabase.
+     *
+     * @return a list of uuids.
+     */
+    protected String[] getArtifactUUIDs(CallContext context)
+    throws    ArtifactDatabaseException
+    {
+        log.debug("FLYSArtifactCollection.getArtifactUUIDs");
+
+        ArtifactDatabase db = context.getDatabase();
+        CallMeta meta       = context.getMeta();
+
+        Document itemList = db.listCollectionArtifacts(identifier(), meta);
+        NodeList items    = (NodeList) XMLUtils.xpath(
+            itemList,
+            XPATH_COLLECTION_ITEMS,
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (items == null || items.getLength() == 0) {
+            log.debug("No artifacts found in this collection.");
+            return null;
+        }
+
+        int num = items.getLength();
+
+        List<String> uuids = new ArrayList<String>(num);
+
+        for (int i = 0; i < num; i++) {
+            String uuid = XMLUtils.xpathString(
+                items.item(i),
+                "@art:uuid",
+                ArtifactNamespaceContext.INSTANCE);
+
+            if (uuid != null && uuid.trim().length() != 0) {
+                uuids.add(uuid);
+            }
+        }
+
+        return (String[]) uuids.toArray(new String[uuids.size()]);
+    }
+
+
+    /**
+     * Returns a concrete Artifact of this collection specified by its uuid.
+     *
+     * @param uuid The Artifact's uuid.
+     * @param context The CallContext.
+     *
+     * @return an Artifact.
+     */
+    protected Artifact getArtifact(String uuid, CallContext context)
+    throws    ArtifactDatabaseException
+    {
+        log.debug("FLYSArtifactCollection.getArtifact");
+
+        Backend backend               = Backend.getInstance();
+        PersistentArtifact persistent = backend.getArtifact(uuid);
+
+        return persistent != null ? persistent.getArtifact() : null;
+    }
+
+
+    /**
+     * Returns the attribute that belongs to an artifact stored in this
+     * collection.
+     *
+     * @param uuid The Artifact's uuid.
+     * @param outname The name of the requested output.
+     * @param facet The name of the requested facet.
+     * @param context The CallContext.
+     *
+     * @return an attribute in form of a document.
+     */
+    protected Document getFacetThemeFromAttribute(
+        String      uuid,
+        String      outName,
+        String      facet,
+        CallContext context)
+    throws    ArtifactDatabaseException
+    {
+        log.debug("FLYSArtifactCollection.getFacetThemeFromAttribute");
+
+        ArtifactDatabase db = context.getDatabase();
+        CallMeta       meta = context.getMeta();
+
+        FLYSContext flysContext = context instanceof FLYSContext
+            ? (FLYSContext) context
+            : (FLYSContext) context.globalContext();
+
+        Map<String, String> mappings = (Map<String, String>)
+            flysContext.get(FLYSContext.THEME_MAPPING);
+
+        String themeName = mappings.get(facet);
+
+        Document attr = db.getCollectionItemAttribute(identifier(), uuid, meta);
+
+        if (attr == null) {
+            attr = initItemAttribute(uuid, facet, context);
+
+            if (attr == null) {
+                return null;
+            }
+        }
+
+        log.debug("Search attribute of collection item: " + uuid);
+
+        Node tmp = (Node) XMLUtils.xpath(
+            attr,
+            "/art:attribute",
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (tmp == null) {
+            log.warn("No attribute found. Operation failed.");
+            return null;
+        }
+
+        log.debug("Search theme '" + themeName + "' in attribute.");
+
+        Node theme = (Node) XMLUtils.xpath(
+            tmp,
+            "art:themes/theme[@name='" + themeName + "']",
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (theme == null) {
+            log.warn("Could not find the theme in attribute of: " + uuid);
+
+            Theme t = getThemeForFacet(uuid, facet, context);
+
+            if (t == null) {
+                log.warn("No theme found for facet: " + facet);
+                return null;
+            }
+
+            addThemeToAttribute(uuid, attr, t, context);
+            theme   = t.toXML().getFirstChild();
+        }
+
+        Document doc = XMLUtils.newDocument();
+        doc.appendChild(doc.importNode(theme, true));
+
+        return doc;
+    }
+
+
+    /**
+     * Adds the theme of a facet to a CollectionItem's attribute.
+     *
+     * @param uuid The uuid of the artifact.
+     * @param attr The current attribute of an artifact.
+     * @param t The theme to add.
+     * @param context The CallContext.
+     */
+    protected void addThemeToAttribute(
+        String      uuid,
+        Document    attr,
+        Theme       t,
+        CallContext context)
+    {
+        log.debug("FLYSArtifactCollection.addThemeToAttribute: " + uuid);
+
+        if (t == null) {
+            log.warn("Theme is empty - cancel adding it to attribute!");
+            return;
+        }
+
+        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
+            attr,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Node tmp = (Node) XMLUtils.xpath(
+            attr,
+            "/art:attribute",
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (tmp == null) {
+            tmp = ec.create("attribute");
+            attr.appendChild(tmp);
+        }
+
+        Node themes = (Node) XMLUtils.xpath(
+            tmp,
+            "art:themes",
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (themes == null) {
+            themes = ec.create("themes");
+            tmp.appendChild(themes);
+        }
+
+        themes.appendChild(attr.importNode(t.toXML().getFirstChild(), true));
+
+        try {
+            setCollectionItemAttribute(uuid, attr, context);
+
+            log.debug("Successfully added theme to item attribute.");
+        }
+        catch (ArtifactDatabaseException e) {
+            // do nothing
+            log.warn("Cannot set attribute of item: " + uuid);
+        }
+    }
+
+
+    /**
+     * Initializes the attribute of an collection item with the theme of a
+     * specific facet.
+     *
+     * @param uuid The uuid of an artifact.
+     * @param facet The name of a facet.
+     * @param context The CallContext.
+     *
+     * @param the new attribute.
+     */
+    protected Document initItemAttribute(
+        String      uuid,
+        String      facet,
+        CallContext context)
+    {
+        log.info("FLYSArtifactCollection.initItemAttribute");
+
+        Theme t = getThemeForFacet(uuid, facet, context);
+
+        if (t == null) {
+            log.info("Could not find theme for facet. Cancel initialization.");
+            return null;
+        }
+
+        Document attr = XMLUtils.newDocument();
+
+        addThemeToAttribute(uuid, attr, t, context);
+
+        return attr;
+    }
+
+
+    /**
+     * Sets the attribute of a CollectionItem specified by <i>uuid</i> to a new
+     * value <i>attr</i>.
+     *
+     * @param uuid The uuid of the CollectionItem.
+     * @param attr The new attribute for the CollectionItem.
+     * @param context The CallContext.
+     */
+    public void setCollectionItemAttribute(
+        String      uuid,
+        Document    attr,
+        CallContext context)
+    throws ArtifactDatabaseException
+    {
+        Document doc = ClientProtocolUtils.newSetItemAttributeDocument(
+            uuid,
+            attr);
+
+        if (doc == null) {
+            log.warn("Cannot set item attribute: No attribute found.");
+            return;
+        }
+
+        ArtifactDatabase db = context.getDatabase();
+        CallMeta       meta = context.getMeta();
+
+        db.setCollectionItemAttribute(identifier(), uuid, doc, meta);
+    }
+
+
+    /**
+     * Returns the theme of a specific facet.
+     *
+     * @param uuid The uuid of an artifact.
+     * @param facet The name of the facet.
+     * @param context The CallContext object.
+     *
+     * @return the desired theme.
+     */
+    protected Theme getThemeForFacet(
+        String uuid,
+        String facet,
+        CallContext context)
+    {
+        log.info("FLYSArtifactCollection.getThemeForFacet: " + facet);
+
+        FLYSContext flysContext = context instanceof FLYSContext
+            ? (FLYSContext) context
+            : (FLYSContext) context.globalContext();
+
+        return ThemeFactory.getTheme(flysContext, facet);
+    }
+
+
+    /**
+     * Returns the OutGenerator for a specified <i>type</i>.
+     *
+     * @param name The name of the output type.
+     * @param type Defines the type of the desired OutGenerator.
+     *
+     * @return Instance of an OutGenerator for specified <i>type</i>.
+     */
+    protected OutGenerator getOutGenerator(
+        CallContext context,
+        String      name,
+        String      type)
+    {
+        FLYSContext flysContext = context instanceof FLYSContext
+            ? (FLYSContext) context
+            : (FLYSContext) context.globalContext();
+
+        Map<String, Class> generators = (Map<String, Class>)
+            flysContext.get(FLYSContext.OUTGENERATORS_KEY);
+
+        if (generators == null) {
+            log.error("No output generators found in the running application!");
+            return null;
+        }
+
+        Class clazz = generators.get(name);
+
+        try {
+            return clazz != null ? (OutGenerator) clazz.newInstance() : null;
+        }
+        catch (InstantiationException ie) {
+            log.error(ie, ie);
+        }
+        catch (IllegalAccessException iae) {
+            log.error(iae, iae);
+        }
+
+        return null;
+    }
+
+
+    protected Element buildArtifactNode(
+        ArtifactDatabase        database,
+        String                  uuid,
+        CallContext             context,
+        XMLUtils.ElementCreator ec)
+    throws ArtifactDatabaseException
+    {
+        log.debug("Append artifact '" + uuid + "' to collection description");
+
+        // TODO
+        String hash = "MYHASH";
+
+        Element ci   = ec.create("artifact");
+        ec.addAttr(ci, "uuid", uuid, true);
+        ec.addAttr(ci, "hash", hash, true);
+
+        // XXX I am not sure if it works well every time with an empty document
+        // in the describe operation of an artifact.
+        Document description = database.describe(uuid, null, context.getMeta());
+
+        Node outputModes = (Node) XMLUtils.xpath(
+            description,
+            XPATH_ARTIFACT_OUTPUTMODES,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (outputModes != null) {
+            Document doc = ci.getOwnerDocument();
+            ci.appendChild(doc.importNode(outputModes, true));
+        }
+
+        return ci;
+    }
+
+
+    /**
+     * Inner class to structure/order the themes of a chart.
+     */
+    private class ThemeList {
+        private Logger logger = Logger.getLogger(ThemeList.class);
+        protected Map<Integer, ManagedFacet> themes;
+
+        public ThemeList(Document output) {
+            themes = new HashMap<Integer, ManagedFacet>();
+            parse(output);
+        }
+
+        protected void parse(Document output) {
+            NodeList themes = (NodeList) XMLUtils.xpath(
+                output,
+                "art:output/art:facet",
+                XPathConstants.NODESET,
+                ArtifactNamespaceContext.INSTANCE);
+
+            int num = themes != null ? themes.getLength() : 0;
+
+            logger.debug("Output has " +  num + " elements.");
+
+            if (num == 0) {
+                return;
+            }
+
+            String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+            for (int i = 0; i < num; i++) {
+                Element theme = (Element) themes.item(i);
+
+                String name   = theme.getAttributeNS(uri, "facet");
+                String uuid   = theme.getAttributeNS(uri, "artifact");
+                String pos    = theme.getAttributeNS(uri, "pos");
+                String active = theme.getAttributeNS(uri, "active");
+                String idx    = theme.getAttributeNS(uri, "index");
+                String desc   = theme.getAttributeNS(uri, "description");
+
+                addTheme(uuid, name, idx, pos, active, desc);
+            }
+        }
+
+        protected void addTheme(
+            String uuid,
+            String name,
+            String index,
+            String position,
+            String active,
+            String description)
+        {
+            if (logger.isDebugEnabled()) {
+                logger.debug("Add theme: ");
+                logger.debug(".. name: " + name);
+                logger.debug(".. uuid: " + uuid);
+                logger.debug(".. position: " + position);
+                logger.debug(".. active: " + active);
+            }
+
+            try {
+                int pos = Integer.parseInt(position);
+                int act = Integer.parseInt(active);
+                int idx = Integer.parseInt(index);
+
+                themes.put(
+                    new Integer(pos-1),
+                    new ManagedFacet(name, idx, description, uuid, pos, act));
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn(nfe, nfe);
+            }
+        }
+
+        public ManagedFacet get(int idx) {
+            return themes.get(new Integer(idx));
+        }
+
+        public int size() {
+            return themes.size();
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/collections/OutputParser.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,101 @@
+package de.intevation.flys.collections;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.CallMeta;
+
+import de.intevation.artifactdatabase.state.DefaultOutput;
+import de.intevation.artifactdatabase.state.Facet;
+import de.intevation.artifactdatabase.state.Output;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.ManagedFacetAdapter;
+
+
+public class OutputParser {
+
+    /** Constant XPath that points to the outputmodes of an artifact.*/
+    public static final String XPATH_ARTIFACT_OUTPUTMODES =
+        "/art:result/art:outputmodes/art:output";
+
+
+    private static Logger logger = Logger.getLogger(OutputParser.class);
+
+    protected ArtifactDatabase db;
+    protected CallMeta         meta;
+    protected CallContext      context;
+
+    protected Map<String, Output> outs;
+
+
+    public OutputParser(ArtifactDatabase db, CallContext context) {
+        this.db      = db;
+        this.meta    = context.getMeta();
+        this.context = context;
+        this.outs    = new HashMap<String, Output>();
+    }
+
+
+    public void parse(String uuid)
+    throws ArtifactDatabaseException
+    {
+        logger.debug("OutputParser.parse: " + uuid);
+
+        FLYSArtifact flys = (FLYSArtifact) db.getRawArtifact(uuid);
+
+        List<Output> outList = flys.getOutputs(context);
+
+        for (Output out: outList) {
+            String name = out.getName();
+
+            Output o = outs.get(name);
+            int  pos = 1;
+
+            if (o == null) {
+                o = new DefaultOutput(
+                    out.getName(),
+                    out.getDescription(),
+                    out.getMimeType(),
+                    new ArrayList<Facet>(),
+                    out.getType());
+
+                outs.put(name, o);
+            }
+            else {
+                pos = o.getFacets().size() + 1;
+            }
+
+            List<Facet> facets = facet2ManagedFacet(uuid, out.getFacets(), pos);
+            o.addFacets(facets);
+        }
+    }
+
+
+    public Map<String, Output> getOuts() {
+        return outs;
+    }
+
+
+    protected List<Facet> facet2ManagedFacet(
+        String      uuid,
+        List<Facet> old,
+        int         pos)
+    {
+        List<Facet> newFacets = new ArrayList<Facet>(old.size());
+
+        for (Facet f: old) {
+            newFacets.add(new ManagedFacetAdapter(f, uuid, pos++, 1));
+        }
+
+        return newFacets;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ATExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,78 @@
+package de.intevation.flys.exports;
+
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.IOException;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.model.WQ;
+
+public class ATExporter
+implements   OutGenerator
+{
+    private static Logger logger = Logger.getLogger(ATExporter.class);
+
+    public static final String DEFAULT_ENCODING = "UTF-8";
+
+    protected WQ           data;
+    protected CallContext  context;
+    protected OutputStream out;
+
+    public ATExporter() {
+    }
+
+    @Override
+    public void init(Document request, OutputStream out, CallContext context) {
+        this.context = context;
+        this.out     = out;
+    }
+
+    @Override
+    public void setMasterArtifact(Artifact master) {
+        // not needed
+    }
+
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+
+        FLYSArtifact flys = (FLYSArtifact)artifact;
+
+        if ((facet = flys.getNativeFacet(facet)) == null) {
+            logger.debug("native facet not found.");
+            return;
+        }
+
+        data = (WQ)facet.getData(flys, context);
+    }
+
+    @Override
+    public void generate() throws IOException {
+
+        if (data == null) {
+            logger.debug("no W/Q data");
+            return;
+        }
+
+        ATWriter at;
+        try {
+            at = new ATWriter(data);
+        }
+        catch (IllegalArgumentException iae) {
+            logger.error("creating ATWriter failed", iae);
+            throw new IOException(iae);
+        }
+
+        at.write(new OutputStreamWriter(out, DEFAULT_ENCODING));
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ATWriter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,143 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.io.PrintWriter;
+
+import java.util.Locale;
+
+import de.intevation.flys.artifacts.model.WQ;
+
+import org.apache.commons.math.analysis.UnivariateRealFunction;
+
+import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
+import org.apache.commons.math.analysis.interpolation.LinearInterpolator;
+
+import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
+
+import org.apache.commons.math.FunctionEvaluationException;
+
+import org.apache.log4j.Logger;
+
+public class ATWriter
+{
+    private static Logger logger = Logger.getLogger(ATWriter.class);
+
+    public static final int COLUMNS = 10;
+
+    public static final String EMPTY = "         ";
+
+    protected double minW;
+    protected double maxW;
+    protected double minQ;
+    protected double maxQ;
+
+    protected UnivariateRealFunction qFunc;
+
+    public ATWriter() {
+    }
+
+    public ATWriter(WQ wq) throws IllegalArgumentException {
+
+        int [] bounds = wq.longestIncreasingWRangeIndices();
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("exporting w between indices " +
+                bounds[0] + " and " + bounds[1] + " (" +
+                wq.getW(bounds[0]) + ", " + wq.getW(bounds[1]));
+        }
+
+        if (bounds[1]-bounds[0] < 1) { // Only first w can be written out.
+            minW = maxW = wq.getW(bounds[0]);
+            minQ = maxQ = wq.getQ(bounds[0]);
+            // constant function
+            qFunc = new PolynomialFunction(new double [] { minQ });
+            return;
+        }
+
+        double [] ws = new double[bounds[1]-bounds[0]];
+        double [] qs = new double[ws.length];
+
+        for (int i = 0; i < ws.length; ++i) {
+            int idx = bounds[0]+i;
+            ws[i] = wq.getW(idx);
+            qs[i] = wq.getQ(idx);
+        }
+
+        qFunc = ws.length < 3
+            ? new LinearInterpolator().interpolate(ws, qs)
+            : new SplineInterpolator().interpolate(ws, qs);
+
+        minW = wq.getW(bounds[0]);
+        maxW = wq.getW(bounds[1]);
+        minQ = wq.getQ(bounds[0]);
+        maxQ = wq.getQ(bounds[1]);
+    }
+
+    public double getQ(double w) {
+
+        try {
+            return qFunc.value(w);
+        }
+        catch (FunctionEvaluationException aode) {
+            // should not happen
+            logger.warn("spline interpolation failed", aode);
+            return w <= minW ? minQ : maxQ;
+        }
+    }
+
+    protected static void printQ(PrintWriter out, double q) {
+        String format;
+             if (q <   1d) format = " % 8.3f";
+        else if (q <  10d) format = " % 8.2f";
+        else if (q < 100d) format = " % 8.1f";
+        else {
+            format = " % 8.0f";
+            if (q > 1000d) q = Math.rint(q/10d)*10d;
+        }
+        out.printf(Locale.US, format, q);
+    }
+
+    public void write(Writer writer) throws IOException {
+
+        PrintWriter out = new PrintWriter(writer);
+
+        double rest = Math.abs(minW % COLUMNS);
+
+        double startW = Math.round(minW*10.0)/10.0;
+        if (rest >= 1d) {
+            startW -= 0.1;
+            out.printf(Locale.US, "%8d", (int)Math.round(startW*100.0));
+            int columns = (int)Math.floor(rest);
+            for (int i = columns; i < COLUMNS; ++i) {
+                out.print(EMPTY);
+            }
+            for (int i = COLUMNS-columns; i < COLUMNS; ++i) {
+                printQ(out, getQ(startW + i*0.01));
+            }
+            out.println();
+            startW += 0.1;
+        }
+
+        int col = 0;
+        for (double w = startW; w <= maxW; w += 0.01) {
+            if (col == 0) {
+                out.printf(Locale.US, "%8d", (int)Math.round(w*100.0));
+            }
+
+            printQ(out, getQ(w));
+
+            if (++col >= COLUMNS) {
+                out.println();
+                col = 0;
+            }
+        }
+
+        if (col > 0) {
+            out.println();
+        }
+
+        out.flush();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/AbstractExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,227 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+
+/**
+ * An abstract exporter that implements some basic methods for exporting data of
+ * artifacts.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class AbstractExporter implements OutGenerator {
+
+    /** The logger used in this exporter.*/
+    private static Logger logger = Logger.getLogger(AbstractExporter.class);
+
+
+    /** The name of the CSV facet which triggers the CSV creation. */
+    public static final String FACET_CSV = "csv";
+
+    /** The default charset for the CSV export. */
+    public static final String DEFAULT_CSV_CHARSET = "UTF-8";
+
+    /** The default separator for the CSV export. */
+    public static final char DEFAULT_CSV_SEPARATOR = ',';
+
+    /** XPath that points to the desired export facet. */
+    public static final String XPATH_FACET = "/art:action/@art:type";
+
+
+    /** The document of the incoming out() request. */
+    protected Document request;
+
+    /** The output stream where the data should be written to. */
+    protected OutputStream out;
+
+    /** The CallContext object. */
+    protected CallContext context;
+
+    /** The selected facet. */
+    protected String facet;
+
+    /** The master artifact. */
+    protected Artifact master;
+
+
+    /**
+     * Concrete subclasses need to use this method to write their special data
+     * objects into the CSV document.
+     *
+     * @param writer The CSVWriter.
+     */
+    protected abstract void writeCSVData(CSVWriter writer);
+
+
+    /**
+     * This method enables concrete subclasses to collected its own special
+     * data.
+     *
+     * @param artifacts The artifact that stores the data that has to be
+     * exported.
+     */
+    protected abstract void addData(Object data);
+
+    @Override
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("AbstractExporter.init");
+
+        this.request = request;
+        this.out     = out;
+        this.context = context;
+    }
+
+
+    @Override
+    public void setMasterArtifact(Artifact master) {
+        this.master = master;
+    }
+
+
+    /**
+     * This doOut() just collects the data of multiple artifacts. Therefore, it
+     * makes use of the addData() method which enables concrete subclasses to
+     * store its data on its own. The real output creation takes place in the
+     * concrete generate() methods.
+     *
+     * @param artifact The artifact.
+     * @param facet The facet to add - NOTE: the facet needs to fit to the first
+     * facet inserted into this exporter. Otherwise this artifact/facet is
+     * skipped.
+     * @param attr The attr document.
+     */
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = facet.getName();
+
+        logger.debug("AbstractExporter.doOut: " + name);
+
+        if (!isFacetValid(name)) {
+            logger.warn("Facet '" + name + "' not valid. No output created!");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact)artifact;
+
+        Facet nativeFacet = flys.getNativeFacet(facet);
+
+        if (nativeFacet != null) {
+            addData(nativeFacet.getData(flys, context));
+        }
+    }
+
+
+    /**
+     * Generates an export based on a specified facet.
+     */
+    @Override
+    public void generate()
+    throws IOException
+    {
+        logger.debug("AbstractExporter.generate");
+
+        if (facet != null && facet.equals(FACET_CSV)) {
+            generateCSV();
+        }
+        else {
+            throw new IOException("invalid facet for exporter.");
+        }
+    }
+
+
+    /**
+     * Determines if the desired facet is valid for this exporter. If no facet
+     * is currently set, <i>facet</i> is set.
+     *
+     * @param facet The desired facet.
+     *
+     * @return true, if <i>facet</i> is valid, otherwise false.
+     */
+    protected boolean isFacetValid(String facet) {
+        logger.debug("AbstractExporter.isFacetValid");
+
+        String thisFacet = getFacet();
+
+        if (thisFacet == null || thisFacet.length() == 0) {
+            return false;
+        }
+        else if (facet == null || facet.length() == 0) {
+            return false;
+        }
+        else {
+            return thisFacet.equals(facet);
+        }
+    }
+
+
+    /**
+     * Returns the name of the desired facet.
+     *
+     * @return the name of the desired facet.
+     */
+    protected String getFacet() {
+        if (facet == null) {
+            facet = getFacetFromRequest();
+        }
+
+        return facet;
+    }
+
+
+    /**
+     * Extracts the name of the requested facet from request document.
+     *
+     * @return the name of the requested facet.
+     */
+    protected String getFacetFromRequest() {
+        return XMLUtils.xpathString(
+            request, XPATH_FACET, ArtifactNamespaceContext.INSTANCE);
+    }
+
+
+    protected String msg(String key, String def) {
+        return Resources.getMsg(context.getMeta(), key, def);
+    }
+
+
+    /**
+     * This method starts CSV creation. It makes use of writeCSVData() which has
+     * to be implemented by concrete subclasses.
+     */
+    protected void generateCSV()
+    throws    IOException
+    {
+        logger.info("AbstractExporter.generateCSV");
+
+        CSVWriter writer = new CSVWriter(
+            new OutputStreamWriter(
+                out,
+                DEFAULT_CSV_CHARSET),
+            DEFAULT_CSV_SEPARATOR);
+
+        writeCSVData(writer);
+
+        writer.close();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartExportHelper.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,308 @@
+/*
+ * Copyright (c) 2011 by Intevation GmbH
+ *
+ * This program is free software under the LGPL (>=v2.1)
+ * Read the file LGPL.txt coming with the software for details
+ * or visit http://www.gnu.org/licenses/ if it does not exist.
+ */
+package de.intevation.flys.exports;
+
+import com.lowagie.text.Document;
+import com.lowagie.text.DocumentException;
+import com.lowagie.text.PageSize;
+import com.lowagie.text.Rectangle;
+
+import com.lowagie.text.pdf.PdfContentByte;
+import com.lowagie.text.pdf.PdfTemplate;
+import com.lowagie.text.pdf.PdfWriter;
+
+import java.awt.Graphics2D;
+import java.awt.Transparency;
+
+import java.awt.geom.Rectangle2D.Double;
+
+import java.awt.geom.Rectangle2D;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.UnsupportedEncodingException;
+import org.jfree.chart.ChartRenderingInfo;
+
+import javax.imageio.ImageIO;
+
+import org.apache.batik.svggen.SVGGraphics2D;
+import org.apache.batik.svggen.SVGGraphics2DIOException;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+/**
+ * This class is a helper class which supports some methods to export charts
+ * into specific formats.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ChartExportHelper {
+
+    /**
+     * Constant field to define A4 as default page size.
+     */
+    private static final String  DEFAULT_PAGE_SIZE = "A4";
+
+    /**
+     * Constant field to define UTF-8 as default encoding.
+     */
+    private static final String  DEFAULT_ENCODING  = "UTF-8";
+
+    /**
+     * Logger used for logging with log4j.
+     */
+    private static Logger log = Logger.getLogger(ChartExportHelper.class);
+
+
+    /**
+     * A method to export a <code>JFreeChart</code> as image to an
+     * <code>OutputStream</code> with a given format, width and height.
+     *
+     * @param out OutputStream
+     * @param chart JFreeChart object to be exported.
+     * @param format Format (e.g. png, gif, jpg)
+     * @param width Width, the image used to be
+     * @param height Height, the image used to be
+     *
+     * @throws IOException if writing image to OutputStream failed.
+     */
+    public static void exportImage(
+        OutputStream out,
+        JFreeChart chart,
+        String format,
+        int width,
+        int height
+    )
+    throws IOException
+    {
+        log.info("export chart as png");
+
+        ChartRenderingInfo info = new ChartRenderingInfo();
+
+        ImageIO.write(
+            chart.createBufferedImage(
+                width, height, Transparency.BITMASK, info
+            ),
+            format,
+            out
+        );
+    }
+
+
+    /**
+     * A method to export a <code>JFreeChart</code> as SVG to an
+     * <code>OutputStream</code>.
+     *
+     * @param out OutputStream
+     * @param chart JFreeChart to be exported
+     * @param encoding Encoding, defaults to {@link #DEFAULT_ENCODING} if null
+     * @param width Width the svg used to be
+     * @param height Height the svg used to be
+     */
+    public static void exportSVG(
+        OutputStream out,
+        JFreeChart   chart,
+        String       encoding,
+        int          width,
+        int          height
+    ) {
+        log.info("export chart as svg");
+
+        if (encoding == null)
+            encoding = DEFAULT_ENCODING;
+
+        org.w3c.dom.Document document = XMLUtils.newDocument();
+        SVGGraphics2D        graphics = new SVGGraphics2D(document);
+
+        chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,width,height));
+
+        try {
+            graphics.stream(new OutputStreamWriter(out, encoding));
+        }
+        catch (SVGGraphics2DIOException svge) {
+            log.error("Error while writing svg export to output stream.", svge);
+        }
+        catch (UnsupportedEncodingException uee) {
+            log.error("Unsupported encoding: " + encoding, uee);
+        }
+    }
+
+
+    /**
+     * A method to export a <code>JFreeChart</code> as PDF to an
+     * <code>OutputStream</code>.
+     *
+     * @param out OutputStream
+     * @param chart JFreeChart
+     * @param pageFormat String to specify a page format, {@link
+     * #DEFAULT_PAGE_SIZE} is used if no pageFormat is given
+     * @param landscape If this is true, the pdf is delivered in landscape
+     * format
+     * @param marginLeft Space to left border
+     * @param marginRight Space to right border
+     * @param marginTop Space to upper border
+     * @param marginBottom Space to lower border
+     */
+    public static void exportPDF(
+        OutputStream out,
+        JFreeChart   chart,
+        String       pageFormat,
+        float        marginLeft,
+        float        marginRight,
+        float        marginTop,
+        float        marginBottom,
+        CallContext  context
+    ) {
+        log.info("export chart as pdf.");
+
+        if (pageFormat == null)
+            pageFormat = DEFAULT_PAGE_SIZE;
+
+        // max size of the chart
+        Rectangle page = PageSize.getRectangle(pageFormat);
+        float pageWidth  = page.getWidth();
+        float pageHeight = page.getHeight();
+
+        // the chart width
+        int chartWidth  = (Integer) context.getContextValue("chart.width");
+        int chartHeight = (Integer) context.getContextValue("chart.height");
+
+        boolean landscape = chartWidth > chartHeight;
+
+        float width  = 0;
+        float height = 0;
+        if (landscape) {
+            width  = pageHeight;
+            height = pageWidth;
+        }
+        else {
+            width  = pageWidth;
+            height = pageHeight;
+        }
+
+        float spaceX = width  - marginLeft - marginRight;
+        if (chartWidth > spaceX) {
+            log.warn("Width of the chart is too big for pdf -> resize it now.");
+            double ratio = ((double)spaceX) / chartWidth;
+            chartWidth  *= ratio;
+            chartHeight *= ratio;
+            log.debug("Resized chart to " + chartWidth + "x" + chartHeight);
+        }
+
+        float spaceY = height - marginTop  - marginBottom;
+        if (chartHeight > spaceY) {
+            log.warn("Height of the chart is too big for pdf -> resize it now.");
+            double ratio = ((double)spaceY) / chartHeight;
+            chartWidth  *= ratio;
+            chartHeight *= ratio;
+            log.debug("Resized chart to " + chartWidth + "x" + chartHeight);
+        }
+
+        Document document = null;
+        if (landscape) {
+            document = new Document(page.rotate());
+            log.debug("Create landscape pdf.");
+        }
+        else
+            document = new Document(page);
+
+        try {
+            PdfWriter writer = PdfWriter.getInstance(document, out);
+
+            document.addSubject(chart.getTitle().getText());
+            document.addCreationDate();
+            document.open();
+
+            PdfContentByte content  = writer.getDirectContent();
+
+            PdfTemplate template = content.createTemplate(width, height);
+            Graphics2D  graphics = template.createGraphics(width, height);
+
+            double[] origin = getCenteredAnchor(
+                marginLeft, marginRight, marginBottom, marginTop,
+                width, height,
+                chartWidth, chartHeight);
+
+            Rectangle2D area = new Rectangle2D.Double(
+                origin[0], origin[1], chartWidth, chartHeight);
+
+            chart.draw(graphics, area);
+            graphics.dispose();
+            content.addTemplate(template, 0f, 0f);
+        }
+        catch (DocumentException de) {
+            log.error("Error while exporting chart to pdf.", de);
+        }
+        finally {
+            document.close();
+        }
+    }
+
+
+    /**
+     * This method returns the anchor of the chart so that the chart is centered
+     * according to the given parameters.
+     *
+     * @param mLeft Left margin
+     * @param mRight Right margin
+     * @param mBottom Bottom margin
+     * @param mTop Top margin
+     * @param width The complete width of the drawing area.
+     * @param height The complete height of the drawing area.
+     * @param chartWidth The width of the chart.
+     * @param chartHeight The height of the chart.
+     *
+     * @return an array that contains the anchor for a chart with the given
+     * parameters. The first value is the x point, the second value is the y
+     * point.
+     */
+    public static double[] getCenteredAnchor(
+        double mLeft,      double mRight,      double mBottom, double mTop,
+        double width,      double height,
+        double chartWidth, double chartHeight
+    ) {
+        if (log.isDebugEnabled()) {
+            log.debug("Calculate centered origin...");
+            log.debug("-> PDF width    : " + width);
+            log.debug("-> PDF height   : " + height);
+            log.debug("-> Chart width  : " + chartWidth);
+            log.debug("-> Chart height : " + chartHeight);
+            log.debug("-> margin left  : " + mLeft);
+            log.debug("-> margin right : " + mRight);
+            log.debug("-> margin bottom: " + mBottom);
+            log.debug("-> margin top   : " + mTop);
+        }
+
+        double[] origin = new double[2];
+
+        double centerX = width  / 2;
+        double centerY = height / 2;
+
+        origin[0] = centerX - chartWidth / 2;
+        origin[1] = centerY - chartHeight / 2;
+
+        origin[0] = origin[0] >= mLeft ? origin[0] : mLeft;
+        origin[1] = origin[1] >= mTop ? origin[1] : mTop;
+
+        if (log.isDebugEnabled()) {
+            log.debug("==> centered left origin: " + origin[0]);
+            log.debug("==> centered top  origin: " + origin[1]);
+        }
+
+        return origin;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,251 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.jfree.data.Range;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.River;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.resources.Resources;
+import de.intevation.flys.utils.FLYSUtils;
+
+
+/**
+ * The base class for chart creation. It should provide some basic things that
+ * equal in all chart types.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class ChartGenerator implements OutGenerator {
+
+    private static Logger logger = Logger.getLogger(ChartGenerator.class);
+
+
+    /** The default chart width, if no other width is set. */
+    public static final int DEFAULT_CHART_WIDTH  = 600;
+
+    /** The default chart height, if no other height is set.*/
+    public static final int DEFAULT_CHART_HEIGHT = 400;
+
+    /** The XPath that points to the chart size of the incoming request
+     * document.*/
+    public static final String XPATH_CHART_SIZE =
+        "/art:action/art:attributes/art:size";
+
+    public static final String XPATH_CHART_X_RANGE =
+        "/art:action/art:attributes/art:xrange";
+
+    public static final String XPATH_CHART_Y_RANGE =
+        "/art:action/art:attributes/art:yrange";
+
+
+    /** The document of the incoming out() request.*/
+    protected Document request;
+
+    /** The output stream where the data should be written to.*/
+    protected OutputStream out;
+
+    /** The CallContext object.*/
+    protected CallContext context;
+
+    /** The artifact that is used to decorate the chart with meta information.*/
+    protected Artifact master;
+
+
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("ChartGenerator.init");
+
+        this.request = request;
+        this.out     = out;
+        this.context = context;
+    }
+
+
+    public void setMasterArtifact(Artifact master) {
+        this.master = master;
+    }
+
+
+    protected String msg(String key, String def) {
+        return Resources.getMsg(context.getMeta(), key, def);
+    }
+
+
+    protected String msg(String key, String def, Object[] args) {
+        return Resources.getMsg(context.getMeta(), key, def, args);
+    }
+
+
+    protected String getRiverName() {
+        WINFOArtifact flys = (WINFOArtifact) master;
+
+        River river = FLYSUtils.getRiver(flys);
+        return (river != null) ? river.getName() : "";
+    }
+
+
+    protected double[] getRange() {
+        WINFOArtifact flys = (WINFOArtifact) master;
+
+        return FLYSUtils.getKmRange(flys);
+    }
+
+
+    /**
+     * Returns the size of a chart export as array which has been specified by
+     * the incoming request document.
+     *
+     * @return the size of a chart as [width, height] or the result of
+     * getDefaultSize() if no width or height are given in the request document.
+     */
+    protected int[] getSize() {
+        int[] size = new int[2];
+
+        Element sizeEl = (Element)XMLUtils.xpath(
+            request,
+            XPATH_CHART_SIZE,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (sizeEl != null) {
+            String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+            String w = sizeEl.getAttributeNS(uri, "width");
+            String h = sizeEl.getAttributeNS(uri, "height");
+
+            if (w.length() > 0 && h.length() > 0) {
+                try {
+                    size[0] = Integer.parseInt(w);
+                    size[1] = Integer.parseInt(h);
+                }
+                catch (NumberFormatException nfe) {
+                    logger.warn("Wrong values for chart width/height.");
+                }
+            }
+        }
+
+        return size[0] > 0 && size[1] > 0 ? size : getDefaultSize();
+    }
+
+
+    protected Range getDomainAxisRange() {
+        Element xrange = (Element)XMLUtils.xpath(
+            request,
+            XPATH_CHART_X_RANGE,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (xrange == null) {
+            return null;
+        }
+
+        String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+        String lower = xrange.getAttributeNS(uri, "from");
+        String upper = xrange.getAttributeNS(uri, "to");
+
+        logger.debug("FOUND X RANGE: " + lower + " -> " + upper);
+
+        if (lower.length() > 0 && upper.length() > 0) {
+            try {
+                double from = Double.parseDouble(lower);
+                double to   = Double.parseDouble(upper);
+
+                if (from == 0 && to == 0) {
+                    logger.debug("No range specified. Lower and upper X == 0");
+                    return null;
+                }
+
+                if (from > to) {
+                    double tmp = to;
+                    to         = from;
+                    from       = tmp;
+                }
+
+                return new Range(from, to);
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn("Wrong values for domain axis range.");
+            }
+        }
+
+        return null;
+    }
+
+
+    protected Range getValueAxisRange() {
+        Element yrange = (Element)XMLUtils.xpath(
+            request,
+            XPATH_CHART_Y_RANGE,
+            XPathConstants.NODE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (yrange == null) {
+            return null;
+        }
+
+        String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+        String lower = yrange.getAttributeNS(uri, "from");
+        String upper = yrange.getAttributeNS(uri, "to");
+
+        if (lower.length() > 0 && upper.length() > 0) {
+            try {
+                double from = Double.parseDouble(lower);
+                double to   = Double.parseDouble(upper);
+
+                if (from == 0 && to == 0) {
+                    logger.debug("No range specified. Lower and upper Y == 0");
+                    return null;
+                }
+
+                if (from > to) {
+                    double tmp = to;
+                    to         = from;
+                    from       = tmp;
+                }
+
+                return new Range(from, to);
+            }
+            catch (NumberFormatException nfe) {
+                logger.warn("Wrong values for value axis range.");
+            }
+        }
+
+        return null;
+    }
+
+
+    /**
+     * Returns the default size of a chart export as array.
+     *
+     * @return the default size of a chart as [width, height].
+     */
+    protected int[] getDefaultSize() {
+        return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT };
+    }
+
+
+    public abstract void doOut(Artifact artifact, Facet facet, Document attr);
+
+    public abstract void generate() throws IOException;
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,112 @@
+package de.intevation.flys.exports;
+
+import java.awt.Transparency;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.ChartRenderingInfo;
+import org.jfree.chart.JFreeChart;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+/**
+ * An OutGenerator that generates meta information for charts. A concrete
+ * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
+ * the methods to that instance. The only thing this ChartInfoGenerator needs
+ * to, is to overrite the generate() method which doesn't write the chart image
+ * to the OutputStream but a Document that contains some meta information of the
+ * created chart.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class ChartInfoGenerator implements OutGenerator {
+
+    /** The logger used in this generator.*/
+    private static Logger logger =
+        Logger.getLogger(ChartInfoGenerator.class);
+
+
+    /** The OutGenerator that creates the charts.*/
+    protected XYChartGenerator generator;
+
+    protected OutputStream out;
+
+
+
+    public ChartInfoGenerator(XYChartGenerator generator) {
+        this.generator = generator;
+    }
+
+
+    /**
+     * Dispatches the operation to the instantiated generator.
+     *
+     * @param request
+     * @param out
+     * @param context
+     */
+    public void init(Document request, OutputStream out, CallContext context) {
+        this.out = out;
+
+        generator.init(request, out, context);
+    }
+
+
+    /**
+     * Dispatches the operation to the instantiated generator.
+     *
+     * @param master
+     */
+    public void setMasterArtifact(Artifact master) {
+        generator.setMasterArtifact(master);
+    }
+
+
+    /**
+     * Dispatches the operation to the instantiated generator.
+     *
+     * @param artifacts
+     * @param facet
+     * @param attr
+     */
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        generator.doOut(artifact, facet, attr);
+    }
+
+
+    /**
+     * This method generates the chart using a concrete ChartGenerator but
+     * doesn't write the chart itself to the OutputStream but a Document that
+     * contains meta information of the created chart.
+     */
+    @Override
+    public void generate()
+    throws IOException
+    {
+        logger.debug("ChartInfoGenerator.generate");
+
+        JFreeChart chart = generator.generateChart();
+
+        int[] size = generator.getSize();
+
+        ChartRenderingInfo info = new ChartRenderingInfo();
+
+        chart.createBufferedImage(size[0], size[1], Transparency.BITMASK, info);
+
+        InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
+        Document doc = helper.createInfoDocument(chart, info);
+
+        XMLUtils.toStream(doc, out);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ComputedDischargeCurveExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,120 @@
+package de.intevation.flys.exports;
+
+import java.io.OutputStream;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.utils.Formatter;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputedDischargeCurveExporter extends AbstractExporter {
+
+    /** The logger used in this exporter.*/
+    private static Logger logger =
+        Logger.getLogger(ComputedDischargeCurveExporter.class);
+
+
+    public static final String CSV_W_HEADER =
+        "export.computed.discharge.curve.csv.header.w";
+
+    public static final String CSV_Q_HEADER =
+        "export.computed.discharge.curve.csv.header.q";
+
+    public static final String DEFAULT_CSV_W_HEADER  = "W [NN + m]";
+    public static final String DEFAULT_CSV_Q_HEADER  = "Q [m\u00b3/s]";
+
+
+    protected List<WQKms> data;
+
+
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("ComputedDischargeCurveExporter.init");
+
+        super.init(request, out, context);
+
+        this.data = new ArrayList<WQKms>();
+    }
+
+
+    @Override
+    protected void addData(Object d) {
+        if (d instanceof CalculationResult) {
+            d = ((CalculationResult)d).getData();
+            if (d instanceof WQKms []) {
+                data.addAll(Arrays.asList((WQKms [])d));
+            }
+        }
+    }
+
+
+    protected void writeCSVData(CSVWriter writer) {
+        logger.info("ComputedDischargeCurveExporter.writeData");
+
+        writeCSVHeader(writer);
+
+        NumberFormat wf  = getWFormatter();
+        NumberFormat qf  = getQFormatter();
+
+        double[] res = new double[3];
+
+        for (WQKms wqkms: data) {
+            int size = wqkms.size();
+
+            for (int i = 0; i < size; i++) {
+                res = wqkms.get(i, res);
+
+                writer.writeNext(new String[] {
+                    wf.format(res[0]),
+                    qf.format(res[1])
+                });
+            }
+        }
+    }
+
+
+    protected void writeCSVHeader(CSVWriter writer) {
+        logger.debug("ComputedDischargeCurveExporter.writeCSVHeader");
+
+        writer.writeNext(new String[] {
+            msg(CSV_W_HEADER, DEFAULT_CSV_W_HEADER),
+            msg(CSV_Q_HEADER, DEFAULT_CSV_Q_HEADER)
+        });
+    }
+
+
+    /**
+     * Returns the number formatter for W values.
+     *
+     * @return the number formatter for W values.
+     */
+    protected NumberFormat getWFormatter() {
+        return Formatter.getComputedDischargeW(context);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values.
+     *
+     * @return the number formatter for Q values.
+     */
+    protected NumberFormat getQFormatter() {
+        return Formatter.getComputedDischargeQ(context);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ComputedDischargeCurveGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,258 @@
+package de.intevation.flys.exports;
+import org.apache.log4j.Logger;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import java.awt.Color;
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.annotations.XYAnnotation;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.data.xy.XYSeries;
+import org.jfree.data.xy.XYSeriesCollection;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.NamedDouble;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.jfree.StickyAxisAnnotation;
+
+import de.intevation.flys.utils.ThemeUtil;
+
+
+/**
+ * An OutGenerator that generates discharge curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputedDischargeCurveGenerator
+extends      DischargeCurveGenerator
+implements   FacetTypes
+{
+    /** The logger used in this generator. */
+    private static Logger logger =
+        Logger.getLogger(ComputedDischargeCurveGenerator.class);
+
+
+    public static final String I18N_CHART_TITLE =
+        "chart.computed.discharge.curve.title";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.computed.discharge.curve.subtitle";
+
+    public static final String I18N_YAXIS_LABEL =
+        "chart.computed.discharge.curve.yaxis.label";
+
+    public static final String I18N_CHART_TITLE_DEFAULT = "Abflusskurve";
+    public static final String I18N_YAXIS_LABEL_DEFAULT = "W [NN + m]";
+    public static final String I18N_MAINVALUES_Q_LABEL = "Q (Haupt- und Extremwerte)";
+    public static final String I18N_MAINVALUES_W_LABEL = "W (Haupt- und Extremwerte)";
+
+    /** List of Annotations (specifically, Main Values). */
+    protected List<XYAnnotation> annotations;
+
+    /** Pseudo-Dataseries to have a legend for annotations. */
+    protected XYSeriesCollection pseudoAnnotationData = null;
+
+
+    /** Trivial Constructor. */
+    public ComputedDischargeCurveGenerator () {
+        super();
+        annotations = new ArrayList<XYAnnotation>();
+    }
+
+
+    @Override
+    protected String getChartTitle() {
+        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT);
+    }
+
+
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+        double[] dist = getRange();
+
+        Object[] args = new Object[] {
+            getRiverName(),
+            dist[0]
+        };
+
+        String subtitle = msg(I18N_CHART_SUBTITLE, "", args);
+        chart.addSubtitle(new TextTitle(subtitle));
+    }
+
+
+    @Override
+    protected String getYAxisLabel() {
+        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
+    }
+
+
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = (facet != null) ? facet.getName() : null;
+
+        logger.debug("ComputedDischargeCurveGenerator.doOut: " + name);
+
+        if (name == null) {
+            logger.warn("Broken facet in computed discharge out generation.");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (name.equals(COMPUTED_DISCHARGE_Q)) {
+            doQOut((WQKms) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(COMPUTED_DISCHARGE_MAINVALUES_Q)) {
+            doMainValueQAnnotations(f.getData(artifact, context), attr);
+        }
+        else if (name.equals(COMPUTED_DISCHARGE_MAINVALUES_W)) {
+            doMainValueWAnnotations(f.getData(artifact, context), attr);
+        }
+        else {
+            logger.warn("Unknown facet type for computed discharge: " + name);
+            return;
+        }
+    }
+
+
+    /**
+     * Store W MainValues as annotations for later plotting.
+     */
+    protected void doMainValueWAnnotations(Object o, Document theme) {
+        logger.debug("ComputedDischargeCurveGenerator set W MainValues.");
+        if (pseudoAnnotationData == null) {
+            pseudoAnnotationData = new XYSeriesCollection();
+        }
+
+        Color color = ThemeUtil.parseLineColorField(theme);
+        if (color == null) {
+            color = Color.black;
+        }
+
+        List<NamedDouble> mainValuesW = (List<NamedDouble>) o;
+        for (NamedDouble mv: mainValuesW) {
+            float pos = (float) mv.getValue();
+            String text = mv.getName();
+            StickyAxisAnnotation ta = new StickyAxisAnnotation(text, pos,
+                    StickyAxisAnnotation.SimpleAxis.Y_AXIS);
+            ta.setPaint(color);
+            this.annotations.add(ta);
+        }
+        String label = msg(I18N_MAINVALUES_W_LABEL, I18N_MAINVALUES_W_LABEL, null);
+        pseudoAnnotationData.addSeries(new StyledXYSeries(label, theme));
+    }
+
+    
+    /**
+     * Store Q MainValues as annotations for later plotting.
+     */
+    protected void doMainValueQAnnotations(Object o, Document theme) {
+        logger.debug("ComputedDischargeCurveGenerator set Q MainValues.");
+
+        Color color = ThemeUtil.parseLineColorField(theme);
+        if (color == null) {
+            color = Color.black;
+        }
+
+        if (pseudoAnnotationData == null) {
+            pseudoAnnotationData = new XYSeriesCollection();
+        }
+
+        List<NamedDouble> mainValuesQ = (List<NamedDouble>) o;
+        for (NamedDouble mv: mainValuesQ) {
+            float pos = (float) mv.getValue();
+            String text = mv.getName();
+            StickyAxisAnnotation ta = new StickyAxisAnnotation(text, pos);
+            ta.setPaint(color);
+            this.annotations.add(ta);
+        }
+        String label = msg(I18N_MAINVALUES_Q_LABEL, I18N_MAINVALUES_Q_LABEL, null);
+        pseudoAnnotationData.addSeries(new StyledXYSeries(label, theme));
+    }
+
+
+    /** Generate Chart with annotations. */
+    @Override
+    public JFreeChart generateChart() {
+        JFreeChart c = super.generateChart();
+        XYPlot p = (XYPlot) c.getPlot();
+        redoAnnotations(p);
+        return c;
+    }
+
+
+    /**
+     * Recalculate some annotation positions and add them to plot.
+     * Annotations represent MainValues.
+     * @param plot      Plot to add annotations to.
+     */
+    protected void redoAnnotations(XYPlot plot) {
+        plot.clearAnnotations();
+
+        for (XYAnnotation a: annotations) {
+            plot.addAnnotation(a, false);
+        }
+    }
+
+
+    /**
+     * Add Q-Series to plot.
+     * @param wqkms actual data
+     * @param theme theme to use.
+     */
+    protected void doQOut(WQKms wqkms, Document theme) {
+        int size = wqkms.size();
+
+        double[]   res  = new double[3];
+
+        XYSeries series = new StyledXYSeries(getSeriesName(wqkms), theme);
+        for (int i = 0; i < size; i++) {
+            res = wqkms.get(i, res);
+            series.add(res[1], res[0]);
+        }
+
+        addFirstAxisSeries(series);
+    }
+
+
+    /**
+     * Add datasets to plot.
+     * @param plot plot to add datasets to.
+     * @todo merge with LongitudinalSectionGenerator/superclass.
+     */
+    @Override
+    protected void addDatasets(XYPlot plot) {
+        super.addDatasets(plot);
+        if (pseudoAnnotationData != null) {
+            plot.setDataset(2, pseudoAnnotationData);
+        }
+    }
+
+
+    /**
+     * Get the series name to display in legend.
+     */
+    protected String getSeriesName(WQKms wqkms) {
+        Object[] args = new Object[] {
+            getRiverName(),
+            wqkms.getName()
+        };
+
+        return msg(
+            "chart.computed.discharge.curve.curve.label",
+            "",
+            args);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ComputedDischargeCurveInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,16 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific computed
+ * discharge curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ComputedDischargeCurveInfoGenerator extends ChartInfoGenerator {
+
+    public ComputedDischargeCurveInfoGenerator() {
+        super(new ComputedDischargeCurveGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,215 @@
+package de.intevation.flys.exports;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYSeries;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+
+
+/**
+ * An OutGenerator that generates cross section graphs.
+ */
+public class CrossSectionGenerator
+extends      XYChartGenerator
+implements   FacetTypes
+{
+    /** The logger that is used in this generator. */
+    private static Logger logger =
+        Logger.getLogger(CrossSectionGenerator.class);
+
+    public static final String I18N_CHART_TITLE =
+        "chart.cross_section.title";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.cross_section.subtitle";
+
+    public static final String I18N_XAXIS_LABEL =
+        "chart.cross_section.xaxis.label";
+
+    public static final String I18N_YAXIS_LABEL =
+        "chart.cross_section.yaxis.label";
+
+    public static final String I18N_CHART_TITLE_DEFAULT = "Querprofildiagramm";
+    public static final String I18N_XAXIS_LABEL_DEFAULT = "Abstand [m]";
+    public static final String I18N_YAXIS_LABEL_DEFAULT = "W [NN + m]";
+
+
+    /** Trivial Constructor. */
+    public CrossSectionGenerator() {
+        super();
+    }
+
+
+    /**
+     * Get localized chart title.
+     */
+    protected String getChartTitle() {
+        // TODO get river etc for localized heading
+        Object[] i18n_msg_args = new Object[] {
+            getRiverName()
+        };
+        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT, i18n_msg_args);
+    }
+
+
+    /**
+     * Add localized subtitle to chart.
+     */
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+        double[] dist = getRange();
+
+        Object[] args = new Object[] {
+            getRiverName(),
+            getKm()
+        };
+
+        String subtitle = msg(I18N_CHART_SUBTITLE, "", args);
+        chart.addSubtitle(new TextTitle(subtitle));
+    }
+
+
+    /**
+     * Get localized X Axis label.
+     */
+    protected String getXAxisLabel() {
+        return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL_DEFAULT);
+    }
+
+
+    /**
+     * Get cross_section.km data from artifact.
+     */
+    protected Double getKm() {
+        try {
+            WINFOArtifact winfo = (WINFOArtifact) master;
+            return winfo.getCrossSectionSnapKm();
+        }
+        catch (Exception e) {
+            logger.error("Cannot convert cross_section.km to double");
+            return 0.0d;
+        }
+    }
+
+
+    /**
+     * Get localized Y Axis label.
+     */
+    protected String getYAxisLabel() {
+        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
+    }
+
+
+    protected void adjustAxes(XYPlot plot) {
+        super.adjustAxes(plot);
+
+        NumberAxis qAxis = new NumberAxis(
+            msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT));
+
+        plot.setRangeAxis(1, qAxis);
+    }
+
+
+    /**
+     * Overrides XYChartGenerators.zoomY() to include the 0 value on the Q axis.
+     */
+    @Override
+    protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        if (plot.getRangeAxisIndex(axis) == 1) {
+            // we want the Q axis to start at 0 if no zooming has been done
+            range = new Range(0d, range.getUpperBound());
+        }
+
+        return super.zoomY(plot, axis, range, x);
+    }
+
+
+    /**
+     * Let one facet do its job.
+     */
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = facet.getName();
+
+        logger.debug("CrossSectionGenerator.doOut: " + name);
+
+        if (name == null) {
+            logger.error("No facet name for doOut(). No output generated!");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (f == null) {
+            return;
+        }
+
+        if (name.equals(CROSS_SECTION)) {
+            doCrossSectionOut(f.getData(artifact, context), f.getDescription(), attr);
+        }
+        else if (name.equals(CROSS_SECTION_WATER_LINE)) {
+            doCrossSectionWaterLineOut(f.getData(artifact, context), f.getDescription(), attr);
+        }
+        else {
+            logger.warn("CrossSection.doOut: Unknown facet name: " + name);
+            return;
+        }
+    }
+
+
+    /**
+     * Do cross sections waterline out.
+     *
+     * @param seriesName name of the data (line) to display in legend.
+     * @param theme Theme for the data series.
+     */
+    protected void doCrossSectionWaterLineOut(Object o, String seriesName, Document theme) {
+        logger.debug("CrossSectionGenerator.doCrossSectionWaterLineOut");
+
+        XYSeries series = new StyledXYSeries(seriesName, theme);
+
+        double[][] a = (double [][]) o;
+        double [] pxs = a[0];
+        for (int i = 0; i < pxs.length; i++) {
+            series.add (a[0][i], a[1][i]);
+        }
+        addFirstAxisSeries(series);
+    }
+
+
+    /**
+     * Do cross sections out.
+     *
+     * @param seriesName name of the data (line) to display in legend.
+     * @param theme Theme for the data series.
+     */
+    protected void doCrossSectionOut(Object o, String seriesName, Document theme) {
+        logger.debug("CrossSectionGenerator.doCrossSectionOut");
+
+        XYSeries series = new StyledXYSeries(seriesName, theme);
+
+        double[][] a = (double [][]) o;
+        double [] pxs = a[0];
+        for (int i = 0; i < pxs.length; i++) {
+            series.add (a[0][i], a[1][i]);
+        }
+        addFirstAxisSeries(series);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/CrossSectionInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,14 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific cross
+ * sections.
+ */
+public class CrossSectionInfoGenerator extends ChartInfoGenerator {
+
+    public CrossSectionInfoGenerator() {
+        super(new CrossSectionGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,187 @@
+package de.intevation.flys.exports;
+
+import java.util.Date;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYSeries;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.model.DischargeTable;
+import de.intevation.flys.model.Gauge;
+import de.intevation.flys.model.River;
+import de.intevation.flys.model.TimeInterval;
+
+import de.intevation.flys.artifacts.WINFOArtifact;
+
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.utils.FLYSUtils;
+
+/**
+ * An OutGenerator that generates discharge curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DischargeCurveGenerator extends XYChartGenerator {
+
+    /** The logger used in this generator. */
+    private static Logger logger =
+        Logger.getLogger(DischargeCurveGenerator.class);
+
+
+    public static final String I18N_CHART_TITLE =
+        "chart.discharge.curve.title";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.discharge.curve.subtitle";
+
+    public static final String I18N_XAXIS_LABEL =
+        "chart.discharge.curve.xaxis.label";
+
+    public static final String I18N_YAXIS_LABEL =
+        "chart.discharge.curve.yaxis.label";
+
+    public static final String I18N_CHART_TITLE_DEFAULT  = "Abflusskurven";
+    public static final String I18N_XAXIS_LABEL_DEFAULT  = "Q [m\u00b3/s]";
+    public static final String I18N_YAXIS_LABEL_DEFAULT  = "W [cm]";
+
+
+
+    public DischargeCurveGenerator() {
+        super();
+    }
+
+
+    protected String getChartTitle() {
+        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT);
+    }
+
+
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+
+    }
+
+
+    protected String getXAxisLabel() {
+        return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL_DEFAULT);
+    }
+
+
+    protected String getYAxisLabel() {
+        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
+    }
+
+
+    @Override
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        boolean zoomin = super.zoom(plot, axis, range, x);
+
+        if (!zoomin) {
+            axis.setLowerBound(0d);
+        }
+
+        return zoomin;
+    }
+
+
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        logger.debug("DischargeCurveGenerator.doOut: " + facet.getName());
+
+        if (!(artifact instanceof WINFOArtifact)) {
+            logger.debug("Artifact is no instance of WINFOArtifact.");
+            return;
+        }
+
+        WINFOArtifact flysArtifact = (WINFOArtifact) artifact;
+
+        facet = flysArtifact.getNativeFacet(facet);
+
+        if (facet == null) {
+            logger.debug("no facet found");
+            return;
+        }
+
+        WQKms wqkms = (WQKms)facet.getData(flysArtifact, context);
+
+        String gaugeName = wqkms.getName();
+
+        River river = FLYSUtils.getRiver(flysArtifact);
+
+        if (river == null) {
+            logger.debug("no river found");
+            return;
+        }
+
+        Gauge gauge = river.determineGaugeByName(gaugeName);
+
+        if (gauge == null) {
+            logger.debug("no gauge found");
+            return;
+        }
+
+        String seriesName = getSeriesName(gauge);
+
+        double [][] values = new double [][] {
+            wqkms.getQs(), wqkms.getWs() };
+
+        int size = values != null ? values[0].length : 0;
+
+        XYSeries series = new StyledXYSeries(seriesName, attr);
+
+        for (int i = 0; i < size; i++) {
+            series.add(values[0][i], values[1][i]);
+        }
+
+        addFirstAxisSeries(series);
+    }
+
+
+    protected String getSeriesName(Gauge gauge) {
+        // XXX The following code stops the artifact server accepting new HTTP
+        // requests. It needs more analysis! Is loading the discharge table a
+        // memory problem? Or is the time interval the problem?
+
+        //List<DischargeTable> dts = gauge.getDischargeTables();
+
+        //for (DischargeTable dt: dts) {
+        //    if (dt.getKind() == 0) {
+        //        TimeInterval ti = dt.getTimeInterval();
+
+        //        Date start = ti.getStartTime();
+        //        Date end   = ti.getStopTime();
+
+        //        String name  = gauge.getName();
+
+        //        if (end == null) {
+        //            Object[] args = new Object[] { name, start };
+        //            return msg(
+        //                "chart.discharge.curve.curve.valid.from",
+        //                "",
+        //                args);
+        //        }
+        //        else {
+        //            Object[] args = new Object[] { name, start, end };
+        //            return msg(
+        //                "chart.discharge.curve.curve.valid.range",
+        //                "",
+        //                args);
+        //        }
+        //    }
+        //}
+
+        return gauge.getName();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeCurveInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,16 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific discharge
+ * curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DischargeCurveInfoGenerator extends ChartInfoGenerator {
+
+    public DischargeCurveInfoGenerator() {
+        super(new DischargeCurveGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,121 @@
+package de.intevation.flys.exports;
+
+import java.text.NumberFormat;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.flys.artifacts.model.WQCKms;
+import de.intevation.flys.artifacts.model.WQKms;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DischargeLongitudinalSectionExporter extends WaterlevelExporter {
+
+    /** The logger used in this exporter.*/
+    private static Logger logger =
+        Logger.getLogger(DischargeLongitudinalSectionExporter.class);
+
+
+    public static final String CSV_KM_HEADER =
+        "export.discharge.longitudinal.section.csv.header.km";
+
+    public static final String CSV_W_HEADER =
+        "export.discharge.longitudinal.section.csv.header.w";
+
+    public static final String CSV_CW_HEADER =
+        "export.discharge.longitudinal.section.csv.header.cw";
+
+    public static final String CSV_Q_HEADER =
+        "export.discharge.longitudinal.section.csv.header.q";
+
+    public static final String DEFAULT_CSV_KM_HEADER = "Fluss-Km";
+    public static final String DEFAULT_CSV_W_HEADER  = "W [NN + m]";
+    public static final String DEFAULT_CSV_CW_HEADER = "W korr.";
+    public static final String DEFAULT_CSV_Q_HEADER  = "Q [m\u00b3/s]";
+
+
+    @Override
+    protected void addData(Object d) {
+        if (d instanceof CalculationResult) {
+            d = ((CalculationResult)d).getData();
+            if (d instanceof WQKms []) {
+                data.add((WQKms [])d);
+            }
+        }
+    }
+
+
+    @Override
+    protected void writeCSVHeader(CSVWriter writer) {
+        logger.info("WaterlevelExporter.writeCSVHeader");
+
+        writer.writeNext(new String[] {
+            msg(CSV_KM_HEADER, DEFAULT_CSV_KM_HEADER),
+            msg(CSV_W_HEADER, DEFAULT_CSV_W_HEADER),
+            msg(CSV_CW_HEADER, DEFAULT_CSV_CW_HEADER),
+            msg(CSV_Q_HEADER, DEFAULT_CSV_Q_HEADER)
+        });
+    }
+
+    @Override
+    protected void wQKms2CSV(CSVWriter writer, WQKms wqkms) {
+        logger.debug("WaterlevelExporter.wQKms2CSV");
+
+        int      size   = wqkms.size();
+        double[] result = new double[4];
+
+        NumberFormat kmf = getKmFormatter();
+        NumberFormat wf  = getWFormatter();
+        NumberFormat qf  = getQFormatter();
+
+        for (int i = 0; i < size; i ++) {
+            result = wqkms.get(i, result);
+
+            String wc = "";
+            if (wqkms instanceof WQCKms) {
+                wc = wf.format(result[3]);
+            }
+
+            writer.writeNext(new String[] {
+                kmf.format(result[2]),
+                wf.format(result[0]),
+                wc,
+                qf.format(result[1])
+            });
+        }
+    }
+
+
+    @Override
+    protected void addWSTColumn(WstWriter writer, WQKms wqkms) {
+        String name = wqkms.getName();
+
+        // is it a W or a Q mode?
+        int wIdx = name.indexOf("W");
+        int qIdx = name.indexOf("Q");
+
+        String wq = null;
+        if (wIdx >= 0) {
+            wq = "W";
+        }
+        else if (qIdx >= 0) {
+            wq = "Q";
+        }
+
+        // we just want to display the first W or Q value in the WST
+        int start = name.indexOf("(");
+        int end   = name.indexOf(")");
+
+        String   tmp    = name.substring(start+1, end);
+        String[] values = tmp.split(";");
+
+        String column = wq + "=" + values[0];
+
+        writer.addColumn(column);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,111 @@
+package de.intevation.flys.exports;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.data.xy.XYSeries;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.WQCKms;
+import de.intevation.flys.artifacts.model.WQKms;
+
+
+/**
+ * An OutGenerator that generates discharge longitudinal section curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DischargeLongitudinalSectionGenerator
+extends      LongitudinalSectionGenerator
+{
+    private static Logger logger =
+        Logger.getLogger(DischargeLongitudinalSectionGenerator.class);
+
+
+
+    public DischargeLongitudinalSectionGenerator() {
+        super();
+    }
+
+
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        logger.debug("DischargeLongitudinalSectionGenerator.doOut");
+
+        if (facet == null) {
+            return;
+        }
+
+        String name = facet.getName();
+
+        if (name == null) {
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (name.equals(DISCHARGE_LONGITUDINAL_W)) {
+            doWOut((WQKms) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(DISCHARGE_LONGITUDINAL_Q)) {
+            doQOut((WQKms) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(DISCHARGE_LONGITUDINAL_C)) {
+            doCorrectedWOut((WQCKms) f.getData(artifact, context), attr);
+        }
+        else {
+            logger.warn("Unknown facet name: " + name);
+        }
+    }
+
+
+    /**
+     * Adds a new series for the corrected W curve.
+     *
+     * @param wqckms The object that contains the corrected W values.
+     * @param theme The theme that contains styling information.
+     */
+    protected void doCorrectedWOut(WQCKms wqckms, Document theme) {
+        logger.debug("DischargeLongitudinalSectionGenerator.doCorrectedWOut");
+
+        int size = wqckms.size();
+
+        if (size > 0) {
+            XYSeries series = new StyledXYSeries(
+                getSeriesNameForCorrected(wqckms, "W"),
+                theme);
+
+            for (int i = 0; i < size; i++) {
+                series.add(wqckms.getKm(i), wqckms.getC(i));
+            }
+
+            addFirstAxisSeries(series);
+        }
+
+        if (wqckms.guessWaterIncreasing()) {
+            setInverted(true);
+        }
+    }
+
+
+    protected String getSeriesNameForCorrected(WQKms wqkms, String mode) {
+        String name = wqkms.getName();
+
+        name = name.replace(
+            "benutzerdefiniert",
+            "benutzerdefiniert [korrigiert]");
+
+        String prefix = name.indexOf(mode) >= 0 ? null : mode;
+
+        return prefix != null && prefix.length() > 0
+            ? prefix + "(" + name + ")"
+            : name;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeLongitudinalSectionInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,17 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific discharge
+ * longitudinal section curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DischargeLongitudinalSectionInfoGenerator
+extends      ChartInfoGenerator
+{
+    public DischargeLongitudinalSectionInfoGenerator() {
+        super(new DischargeLongitudinalSectionGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DurationCurveExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,138 @@
+package de.intevation.flys.exports;
+
+import java.io.OutputStream;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.WQDay;
+import de.intevation.flys.artifacts.model.CalculationResult;
+
+import de.intevation.flys.utils.Formatter;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DurationCurveExporter extends AbstractExporter {
+
+    /** The logger used in this exporter. */
+    private static Logger logger = Logger.getLogger(WaterlevelExporter.class);
+
+
+    public static final String CSV_DURATION_HEADER =
+        "export.duration.curve.csv.header.duration";
+
+    public static final String CSV_W_HEADER =
+        "export.duration.curve.csv.header.w";
+
+    public static final String CSV_Q_HEADER =
+        "export.duration.curve.csv.header.q";
+
+    public static final String DEFAULT_CSV_DURATION_HEADER = "D [Tagen]";
+    public static final String DEFAULT_CSV_W_HEADER  = "W [NN + m]";
+    public static final String DEFAULT_CSV_Q_HEADER  = "Q [m\u00b3/s]";
+
+
+    /** The storage that contains all WQKms objects for the different facets. */
+    protected List<WQDay> data;
+
+
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("DurationCurveExporter.init");
+
+        super.init(request, out, context);
+
+        this.data = new ArrayList<WQDay>();
+    }
+
+
+    @Override
+    protected void addData(Object d) {
+        if (d instanceof CalculationResult) {
+            d = ((CalculationResult)d).getData();
+            if (d instanceof WQDay) {
+                data.add((WQDay)d);
+            }
+        }
+    }
+
+
+    protected void writeCSVData(CSVWriter writer) {
+        logger.info("DurationCurveExporter.writeData");
+
+        writeCSVHeader(writer);
+
+        for (WQDay wqday: data) {
+            wQDay2CSV(writer, wqday);
+        }
+    }
+
+
+    protected void writeCSVHeader(CSVWriter writer) {
+        logger.info("DurationCurveExporter.writeCSVHeader");
+
+        writer.writeNext(new String[] {
+            msg(CSV_W_HEADER, DEFAULT_CSV_W_HEADER),
+            msg(CSV_Q_HEADER, DEFAULT_CSV_Q_HEADER),
+            msg(CSV_DURATION_HEADER, DEFAULT_CSV_DURATION_HEADER)
+        });
+    }
+
+
+    protected void wQDay2CSV(CSVWriter writer, WQDay wqday) {
+        logger.debug("DurationCurveExporter.wQDay2CSV");
+
+        int size = wqday.size();
+
+        NumberFormat wf  = getWFormatter();
+        NumberFormat qf  = getQFormatter();
+        NumberFormat df  = getDFormatter();
+
+        for (int i = 0; i < size; i ++) {
+            writer.writeNext(new String[] {
+                wf.format(wqday.getW(i)),
+                qf.format(wqday.getQ(i)),
+                df.format(wqday.getDay(i))
+            });
+        }
+    }
+
+
+    /**
+     * Returns the number formatter for W values.
+     *
+     * @return the number formatter for W values.
+     */
+    protected NumberFormat getWFormatter() {
+        return Formatter.getDurationW(context);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values.
+     *
+     * @return the number formatter for Q values.
+     */
+    protected NumberFormat getQFormatter() {
+        return Formatter.getDurationQ(context);
+    }
+
+
+    /**
+     * Returns the number formatter for duration values.
+     *
+     * @return the number formatter for duration values.
+     */
+    protected NumberFormat getDFormatter() {
+        return Formatter.getDurationD(context);
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,224 @@
+package de.intevation.flys.exports;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYSeries;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WQDay;
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+/**
+ * An OutGenerator that generates duration curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DurationCurveGenerator
+extends      XYChartGenerator
+implements   FacetTypes
+{
+    private static Logger logger =
+        Logger.getLogger(DurationCurveGenerator.class);
+
+
+    public static final String I18N_DURATION_W =
+        "chart.duration.curve.curve.w";
+
+    public static final String I18N_DURATION_Q =
+        "chart.duration.curve.curve.q";
+
+    public static final String I18N_CHART_TITLE =
+        "chart.duration.curve.title";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.duration.curve.subtitle";
+
+    public static final String I18N_XAXIS_LABEL =
+        "chart.duration.curve.xaxis.label";
+
+    public static final String I18N_YAXIS_LABEL =
+        "chart.duration.curve.yaxis.label";
+
+    public static final String I18N_CHART_TITLE_DEFAULT  =
+        "Dauerlinie";
+
+    public static final String I18N_XAXIS_LABEL_DEFAULT  =
+        "Unterschreitungsdauer [Tage]";
+
+    public static final String I18N_YAXIS_LABEL_DEFAULT  =
+        "W [NN + m]";
+
+
+    public DurationCurveGenerator() {
+        super();
+    }
+
+
+    protected String getChartTitle() {
+        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT);
+    }
+
+
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+        double[] dist  = getRange();
+
+        Object[] args = new Object[] {
+            getRiverName(),
+            dist[0]
+        };
+
+        String subtitle = msg(I18N_CHART_SUBTITLE, "", args);
+        chart.addSubtitle(new TextTitle(subtitle));
+    }
+
+
+    protected String getXAxisLabel() {
+        return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL_DEFAULT);
+    }
+
+
+    protected String getYAxisLabel() {
+        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
+    }
+
+
+    @Override
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        boolean zoomin = super.zoom(plot, axis, range, x);
+
+        if (!zoomin) {
+            axis.setLowerBound(0d);
+        }
+
+        return zoomin;
+    }
+
+
+    protected void adjustAxes(XYPlot plot) {
+        super.adjustAxes(plot);
+
+        NumberAxis qAxis = new NumberAxis("Q [m\u00b3/s]");
+
+        plot.setRangeAxis(1, qAxis);
+    }
+
+
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = facet != null ? facet.getName() : null;
+
+        logger.debug("DurationCurveGenerator.doOut: " + name);
+
+        if (name == null || name.length() == 0) {
+            logger.error("No facet given. Cannot create dataset.");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (name.equals(DURATION_W)) {
+            doWOut((WQDay) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(DURATION_Q)) {
+            doQOut((WQDay) f.getData(artifact, context), attr);
+        }
+        else {
+            logger.warn("Unknown facet name: " + name);
+            return;
+        }
+    }
+
+
+    /**
+     * Creates the series for a duration curve's W facet.
+     *
+     * @param wqdays The WQDay store that contains the Ws.
+     * @param theme
+     */
+    protected void doWOut(WQDay wqdays, Document theme) {
+        logger.debug("DurationCurveGenerator.doWOut");
+
+        // TODO find the correct series name
+        XYSeries series = new StyledXYSeries(
+            getSeriesName(getRiverName(), DURATION_W), theme);
+
+        int size = wqdays.size();
+        for (int i = 0; i < size; i++) {
+            int  day = wqdays.getDay(i);
+            double w = wqdays.getW(i);
+
+            series.add((double) day, w);
+        }
+
+        addFirstAxisSeries(series);
+    }
+
+
+    /**
+     * Creates the series for a duration curve's Q facet.
+     *
+     * @param wqdays The WQDay store that contains the Qs.
+     * @param theme
+     */
+    protected void doQOut(WQDay wqdays, Document theme) {
+        logger.debug("DurationCurveGenerator.doQOut");
+
+        // TODO find the correct series name
+        XYSeries series = new StyledXYSeries(
+            getSeriesName(getRiverName(), DURATION_Q), theme);
+
+        int size = wqdays.size();
+        for (int i = 0; i < size; i++) {
+            int  day = wqdays.getDay(i);
+            double q = wqdays.getQ(i);
+
+            series.add((double) day, q);
+        }
+
+        addSecondAxisSeries(series);
+    }
+
+
+    protected String getSeriesName(String river, String type) {
+        Object[] args = new Object[] { river };
+
+        if (type == null || type.length() == 0) {
+            logger.warn("No duration curve type given.");
+            return "n/a";
+        }
+        else if (type.equals(DURATION_W)) {
+            return Resources.getMsg(
+                context.getMeta(),
+                I18N_DURATION_W,
+                "W",
+                args);
+        }
+        else if (type.equals(DURATION_Q)) {
+            return Resources.getMsg(
+                context.getMeta(),
+                I18N_DURATION_Q,
+                "W",
+                args);
+        }
+
+        logger.warn("Could not determine chart curve type: " + type);
+        return type;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DurationCurveInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,17 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific duration
+ * curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DurationCurveInfoGenerator
+extends      ChartInfoGenerator
+{
+    public DurationCurveInfoGenerator() {
+        super(new DurationCurveGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,315 @@
+package de.intevation.flys.exports;
+
+import java.awt.geom.AffineTransform;
+import java.awt.geom.NoninvertibleTransformException;
+import java.awt.geom.Rectangle2D;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.ChartRenderingInfo;
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYDataset;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+
+/**
+ * This class helps generating chart info documents.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class InfoGeneratorHelper {
+
+    private static final Logger logger =
+        Logger.getLogger(InfoGeneratorHelper.class);
+
+
+    protected XYChartGenerator generator;
+
+
+    public InfoGeneratorHelper(XYChartGenerator generator) {
+        this.generator = generator;
+    }
+
+
+    /**
+     * Triggers the creation of the chart info document.
+     *
+     * @param chart The JFreeChart chart.
+     * @param info An info object that has been created while chart creation.
+     *
+     * @return the info document.
+     */
+    public Document createInfoDocument(
+        JFreeChart         chart,
+        ChartRenderingInfo info)
+    {
+        logger.debug("InfoGeneratorHelper.createInfoDocument");
+
+        Document doc = XMLUtils.newDocument();
+
+        ElementCreator cr = new ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element chartinfo = cr.create("chartinfo");
+
+        chartinfo.appendChild(createAxesElements(cr, chart));
+        chartinfo.appendChild(createTransformationElements(cr, chart, info));
+
+        doc.appendChild(chartinfo);
+
+        return doc;
+    }
+
+
+    /**
+     * This method create a axes element that contains all domain and range
+     * axes of the given chart.
+     *
+     * @param cr The ElementCreator.
+     * @param chart The chart that provides range information of its axes.
+     *
+     * @return an element with axes information.
+     */
+    protected Element createAxesElements(
+        ElementCreator     cr,
+        JFreeChart         chart)
+    {
+        logger.debug("InfoGeneratorHelper.createRangeElements");
+
+        Element axes = cr.create("axes");
+
+        XYPlot plot = (XYPlot) chart.getPlot();
+
+        int dAxisCount = plot.getDomainAxisCount();
+        for (int i = 0; i < dAxisCount; i++) {
+            ValueAxis axis = plot.getDomainAxis(i);
+            XYDataset data = plot.getDataset(i);
+
+            if (axis != null) {
+                Element e = createAxisElement(cr, axis, data, "domain", i);
+                axes.appendChild(e);
+            }
+        }
+
+        int rAxisCount = plot.getRangeAxisCount();
+        for (int i = 0; i < rAxisCount; i++) {
+            ValueAxis axis = plot.getRangeAxis(i);
+            XYDataset data = plot.getDataset(i);
+
+            if (axis == null || data == null) {
+                logger.warn("Axis or dataset is empty at pos: " + i);
+                continue;
+            }
+
+            Element e = createAxisElement(cr, axis, data, "range", i);
+            axes.appendChild(e);
+        }
+
+        return axes;
+    }
+
+
+    /**
+     * This method create a axis element for a given <i>axis</i> and
+     * <i>type</i>. Type can be one of 'domain' or 'range'.
+     *
+     * @param cr The ElementCreator
+     * @param axis The axis that provides range information.
+     * @param dataset The dataset for min/max determination.
+     * @param type The axis type ('domain' or 'range').
+     * @param pos The position in the chart.
+     *
+     * @return An element that contains range information of a given axis.
+     */
+    protected Element createAxisElement(
+        ElementCreator cr,
+        ValueAxis      axis,
+        XYDataset      dataset,
+        String         type,
+        int            pos)
+    {
+        Range range = axis.getRange();
+
+        Element e = cr.create(type);
+        cr.addAttr(e, "pos", String.valueOf(pos), true);
+        cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
+        cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
+
+        Range[] rs = generator.getRangesForDataset(dataset);
+        Range   r  = null;
+
+        if (type.equals("range")) {
+            r = rs[1];
+        }
+        else {
+            r = rs[0];
+        }
+
+        cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
+        cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
+
+        return e;
+    }
+
+
+    /**
+     * This method appends the values of a transformation matrix to transform
+     * image pixel coordinates into chart coordinates.
+     *
+     * @param cr The ElementCreator.
+     * @param chart The chart object.
+     * @param info The ChartRenderingInfo that is filled while chart creation.
+     *
+     * @return an element that contains one or more transformation matrix.
+     */
+    protected Element createTransformationElements(
+        ElementCreator     cr,
+        JFreeChart         chart,
+        ChartRenderingInfo info)
+    {
+        logger.debug("InfoGeneratorHelper.createTransformationElements");
+
+        Element tf = cr.create("transformation-matrix");
+
+        Rectangle2D dataArea = info.getPlotInfo().getDataArea();
+
+        XYPlot    plot  = (XYPlot) chart.getPlot();
+        ValueAxis xAxis = plot.getDomainAxis();
+
+        if (xAxis == null) {
+            logger.error("There is no x axis in the chart!");
+            return null;
+        }
+
+        for (int i  = 0, num = plot.getRangeAxisCount(); i < num; i++) {
+            ValueAxis yAxis = plot.getRangeAxis(i);
+
+            if (yAxis == null) {
+                logger.warn("No y axis at pos " + i + " existing.");
+                continue;
+            }
+
+            Element matrix = createTransformationElement(
+                cr, xAxis, yAxis, dataArea, i);
+
+            tf.appendChild(matrix);
+        }
+
+        return tf;
+    }
+
+
+    /**
+     * Creates an element that contains values used to transform coordinates
+     * of a coordinate system A into a coordinate system B.
+     *
+     * @param cr The ElementCreator.
+     * @param xAxis The x axis of the target coordinate system.
+     * @param yAxis The y axis of the target coordinate system.
+     * @param dataArea The pixel coordinates of the chart image.
+     * @param pos The dataset position.
+     *
+     * @return an element that contains transformation matrix values.
+     */
+    protected Element createTransformationElement(
+        ElementCreator cr,
+        ValueAxis      xAxis,
+        ValueAxis      yAxis,
+        Rectangle2D    dataArea,
+        int            pos)
+    {
+        double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
+
+        Element matrix = cr.create("matrix");
+
+        cr.addAttr(matrix, "pos", String.valueOf(pos), true);
+        cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
+        cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
+        cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
+        cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
+
+        return matrix;
+    }
+
+
+    /**
+     * This method determines a transformation matrix to transform pixel
+     * coordinates of the chart image into chart coordinates.
+     *
+     * @param dataArea The rectangle that contains the data points of the chart.
+     * @param xRange The x axis range.
+     * @param yRange The y axis range.
+     *
+     * @return a double array as follows: [sx, sy, tx, ty].
+     */
+    protected static double[] createTransformationMatrix(
+        Rectangle2D dataArea,
+        ValueAxis   xAxis,
+        ValueAxis   yAxis)
+    {
+        logger.debug("InfoGeneratorHelper.createTransformationMatrix");
+
+        double offsetX = dataArea.getX();
+        double width   = dataArea.getWidth();
+        double offsetY = dataArea.getY();
+        double height  = dataArea.getHeight();
+
+        Range xRange = xAxis.getRange();
+        Range yRange = yAxis.getRange();
+
+        double lowerX  = xRange.getLowerBound();
+        double upperX  = xRange.getUpperBound();
+        double lowerY  = yRange.getLowerBound();
+        double upperY  = yRange.getUpperBound();
+
+        if (xAxis.isInverted()) {
+            logger.info("X-Axis is inverted!");
+
+            double tmp = upperX;
+            upperX = lowerX;
+            lowerX = tmp;
+        }
+
+        double dMoveX = upperX - lowerX;
+        double fMoveX = width * lowerX;
+        double dMoveY = lowerY - upperY;
+        double fMoveY = height * upperY;
+
+        AffineTransform t1 = AffineTransform.getTranslateInstance(
+                offsetX - ( fMoveX / dMoveX ),
+                offsetY - ( fMoveY / dMoveY ) );
+
+        AffineTransform t2 = AffineTransform.getScaleInstance(
+                width / (upperX - lowerX),
+                height / (lowerY - upperY));
+
+        t1.concatenate(t2);
+
+        try {
+            t1.invert();
+
+            double[] c = new double[6];
+            t1.getMatrix(c);
+
+            return new double[] { c[0], c[3], c[4], c[5] };
+        }
+        catch (NoninvertibleTransformException e) {
+            // do nothing
+            logger.warn("Matrix is not invertible.");
+        }
+
+        return new double[] { 1d, 1d, 0d, 0d };
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,358 @@
+package de.intevation.flys.exports;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYSeries;
+import org.jfree.data.xy.XYSeriesCollection;
+import org.jfree.ui.TextAnchor;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.model.Annotation;
+import de.intevation.flys.jfree.StickyAxisAnnotation;
+
+
+/**
+ * An OutGenerator that generates discharge curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class LongitudinalSectionGenerator
+extends      XYChartGenerator
+implements   FacetTypes
+{
+    /** The logger that is used in this generator. */
+    private static Logger logger =
+        Logger.getLogger(LongitudinalSectionGenerator.class);
+
+    public static final String I18N_CHART_TITLE =
+        "chart.longitudinal.section.title";
+
+    public static final String I18N_ANNOTATIONS_LABEL =
+        "chart.longitudinal.annotations.label";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.longitudinal.section.subtitle";
+
+    public static final String I18N_XAXIS_LABEL =
+        "chart.longitudinal.section.xaxis.label";
+
+    public static final String I18N_YAXIS_LABEL =
+        "chart.longitudinal.section.yaxis.label";
+
+    public static final String I18N_2YAXIS_LABEL =
+        "chart.longitudinal.section.yaxis.second.label";
+
+    public static final String I18N_CHART_TITLE_DEFAULT  = "W-L\u00e4ngsschnitt";
+    public static final String I18N_XAXIS_LABEL_DEFAULT  = "km";
+    public static final String I18N_YAXIS_LABEL_DEFAULT  = "W [NN + m]";
+    public static final String I18N_2YAXIS_LABEL_DEFAULT = "Q [m\u00b3/s]";
+
+
+    protected boolean inverted;
+
+    /** List of annotations to insert in plot. */
+    protected List<Annotation> annotations;
+
+    /** Pseudo-Dataseries to have a legend for the annotations. */
+    protected XYSeriesCollection pseudoAnnotationData = null;
+
+
+    public LongitudinalSectionGenerator() {
+        super();
+        annotations = new ArrayList<Annotation>();
+    }
+
+
+    protected String getChartTitle() {
+        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT);
+    }
+
+    public boolean isInverted() {
+        return inverted;
+    }
+
+    public void setInverted(boolean inverted) {
+        this.inverted = inverted;
+    }
+
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+        double[] dist  = getRange();
+
+        Object[] args = new Object[] {
+            getRiverName(),
+            dist[0],
+            dist[1]
+        };
+
+        String subtitle = msg(I18N_CHART_SUBTITLE, "", args);
+        chart.addSubtitle(new TextTitle(subtitle));
+    }
+
+    @Override
+    public JFreeChart generateChart() {
+        JFreeChart c = super.generateChart();
+        XYPlot p = (XYPlot) c.getPlot();
+
+        redoAnnotations(p, p.getDomainAxis());
+
+        return c;
+    }
+
+
+    protected String getXAxisLabel() {
+        return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL_DEFAULT);
+    }
+
+
+    protected String getYAxisLabel() {
+        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
+    }
+
+
+    protected void adjustAxes(XYPlot plot) {
+        super.adjustAxes(plot);
+
+        NumberAxis qAxis = new NumberAxis(
+            msg(I18N_2YAXIS_LABEL, I18N_2YAXIS_LABEL_DEFAULT));
+
+        plot.setRangeAxis(1, qAxis);
+
+        invertXAxis(plot.getDomainAxis());
+    }
+
+
+    /**
+     * Remove all annotations from plot and re-insert them at an approximately
+     * okay position. The followed approach is naive but side-effect free.
+     *
+     * @param plot the plot.
+     * @param axis the value axis.
+     */
+    protected void redoAnnotations(XYPlot plot, ValueAxis axis) {
+        plot.clearAnnotations();
+        // TODO Position calculation could/should be done in
+        // the StickyAxisAnnotation-Implementation itself.
+        ValueAxis yAxis = plot.getRangeAxis();
+        float posY = 140.f;
+        if (yAxis != null) {
+            posY = (float) yAxis.getRange().getLowerBound();
+            // Add some (2%) space between Text and axis.
+            posY += 0.02f * (yAxis.getRange().getUpperBound()
+                    - yAxis.getRange().getLowerBound());
+        }
+
+        // Add all annotations.
+        for (Annotation a: annotations) {
+            float posX = (float) a.getRange().getA().doubleValue();
+            String text = a.getPosition().getValue();
+
+            StickyAxisAnnotation ta = new StickyAxisAnnotation(text, posX, posY);
+            double rotation = 270.0f * (Math.PI / 180.0f);
+            ta.setRotationAngle(rotation);
+            ta.setRotationAnchor(TextAnchor.CENTER_LEFT);
+            ta.setTextAnchor(TextAnchor.CENTER_LEFT);
+            plot.getRenderer().addAnnotation(ta);
+        }
+    }
+
+
+    /**
+     * This method overrides the XYChartGenerators zoomY method to include the 0
+     * value on the Q axis.
+     */
+    @Override
+    protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        if (plot.getRangeAxisIndex(axis) == 1) {
+            // we want the Q axis to start at 0 if no zooming has been done
+            range = new Range(0d, range.getUpperBound());
+        }
+
+        return super.zoomY(plot, axis, range, x);
+    }
+
+
+    /**
+     * This method inverts the x-axis based on the kilometer information of the
+     * selected river. If the head of the river is at kilometer 0, the axis is
+     * not inverted, otherwise it is.
+     *
+     * @param xaxis The domain axis.
+     */
+    protected void invertXAxis(ValueAxis xaxis) {
+
+        if (inverted) {
+            logger.debug("Invert X-Axis.");
+            xaxis.setInverted(true);
+        }
+    }
+
+
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = facet.getName();
+
+        logger.debug("LongitudinalSectionGenerator.doOut: " + name);
+
+        if (name == null) {
+            logger.error("No facet name for doOut(). No output generated!");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (f == null) {
+            return;
+        }
+
+        if (name.equals(LONGITUDINAL_W)) {
+            doWOut((WQKms) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(LONGITUDINAL_Q)) {
+            doQOut((WQKms) f.getData(artifact, context), attr);
+        }
+        else if (name.equals(LONGITUDINAL_ANNOTATION)) {
+            doAnnotationsOut(f.getData(artifact, context), attr);
+        }
+        else {
+            logger.warn("Unknown facet name: " + name);
+            return;
+        }
+    }
+
+
+    /**
+     * Register annotations available for the diagram.
+     *
+     * @param o     list of annotations (data of facet).
+     * @param theme yet ignored.
+     */
+    protected void doAnnotationsOut(Object o, Document theme) {
+        logger.debug("LongitudinalSectionGenerator.doAnnotationsOut");
+        this.annotations = (List<Annotation>) o;
+
+        // Add (empty) pseudo series to have legend entry for annotations.
+        if (pseudoAnnotationData == null) {
+            pseudoAnnotationData = new XYSeriesCollection();
+        }
+        // Localized legend.
+        Object[] args = new Object[] {getRiverName()};
+        String label = msg(I18N_ANNOTATIONS_LABEL, "", args);
+        pseudoAnnotationData.addSeries(new StyledXYSeries(label, theme));
+    }
+
+
+    /**
+     * Process the output for W facets in a longitudinal section curve.
+     *
+     * @param wqkms An array of WQKms values.
+     * @param theme The theme that contains styling information.
+     */
+    protected void doWOut(WQKms wqkms, Document theme) {
+        logger.debug("LongitudinalSectionGenerator.doWOut");
+
+        XYSeries series = new StyledXYSeries(getSeriesName(wqkms, "W"), theme);
+
+        int size = wqkms.size();
+
+        if (logger.isDebugEnabled()) {
+            if (wqkms.size() > 0) {
+                logger.debug("Generate series: " + series.getKey());
+                logger.debug("Start km: " + wqkms.getKm(0));
+                logger.debug("End   km: " + wqkms.getKm(size-1));
+                logger.debug("Values  : " + size);
+            }
+        }
+
+        for (int i = 0; i < size; i++) {
+            series.add(wqkms.getKm(i), wqkms.getW(i));
+        }
+
+        addFirstAxisSeries(series);
+
+        if (wqkms.guessWaterIncreasing()) {
+            setInverted(true);
+        }
+    }
+
+
+    /**
+     * Process the output for Q facets in a longitudinal section curve.
+     *
+     * @param wqkms An array of WQKms values.
+     * @param theme The theme that contains styling information.
+     */
+    protected void doQOut(WQKms wqkms, Document theme) {
+        logger.debug("LongitudinalSectionGenerator.doQOut");
+
+        XYSeries series = new StyledXYSeries(getSeriesName(wqkms, "Q"), theme);
+
+        int size = wqkms.size();
+
+        if (logger.isDebugEnabled()) {
+            if (wqkms.size() > 0) {
+                logger.debug("Generate series: " + series.getKey());
+                logger.debug("Start km: " + wqkms.getKm(0));
+                logger.debug("End   km: " + wqkms.getKm(size-1));
+                logger.debug("Values  : " + size);
+            }
+        }
+
+        for (int i = 0; i < size; i++) {
+            series.add(wqkms.getKm(i), wqkms.getQ(i));
+        }
+
+        addSecondAxisSeries(series);
+
+        if (wqkms.guessWaterIncreasing()) {
+            setInverted(true);
+        }
+    }
+
+
+    /**
+     * Add datasets to plot.
+     * @param plot plot to add datasets to.
+     */
+    @Override
+    protected void addDatasets(XYPlot plot) {
+        super.addDatasets(plot);
+        if (pseudoAnnotationData != null) {
+            plot.setDataset(2, pseudoAnnotationData);
+        }
+    }
+
+
+    /**
+     * Get name of series (displayed in legend).
+     * @return name of the series.
+     */
+    protected String getSeriesName(WQKms wqkms, String mode) {
+        String name   = wqkms.getName();
+        String prefix = name != null && name.indexOf(mode) >= 0 ? null : mode;
+
+        return prefix != null && prefix.length() > 0
+            ? prefix + "(" + name +")"
+            : name;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,17 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific
+ * longitudinal section curves.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class LongitudinalSectionInfoGenerator
+extends      ChartInfoGenerator
+{
+    public LongitudinalSectionInfoGenerator() {
+        super(new LongitudinalSectionGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/OutGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,58 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+
+/**
+ * An OutGenerator is used to create a collected outputs of a list of Artifacts.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public interface OutGenerator {
+
+    /**
+     * Initializes the OutGenerator with meta information which are necessary
+     * for the output generation.
+     *
+     * @param request The incomding request document.
+     * @param out     The output stream.
+     * @param context The CallContext that provides further information and
+     * objects used for the output generation.
+     */
+    void init(Document request, OutputStream out, CallContext context);
+
+    /**
+     * This method is used to tell the OutGenerator which artifact is the master
+     * artifact which is used for special operations.
+     *
+     * @param master The master artifact.
+     */
+    void setMasterArtifact(Artifact master);
+
+    /**
+     * Creates the output of an Artifact and appends that single output to the
+     * total output.
+     *
+     * @param artifact The artifact that provides information and data for the
+     * single output.
+     * @param attr A document that might contain some attributes used while
+     * producing the output.
+     */
+    void doOut(Artifact artifact, Facet facet, Document attr);
+
+    /**
+     * Writes the collected output of all artifacts specified in the
+     * <i>request</i> (see init()) document to the OutputStream <i>out</i> (see
+     * init()).
+     */
+    void generate() throws IOException;
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ReportGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,62 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.model.Calculation;
+
+import org.w3c.dom.Document;
+
+public class ReportGenerator
+implements   OutGenerator
+{
+    private static Logger logger = Logger.getLogger(ReportGenerator.class);
+
+    protected Document     result;
+    protected OutputStream out;
+    protected CallContext  context;
+
+    public ReportGenerator() {
+    }
+
+    @Override
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("init");
+        this.out     = out;
+        this.context = context;
+        result = XMLUtils.newDocument();
+    }
+
+    @Override
+    public void setMasterArtifact(Artifact master) {
+        // not needed
+    }
+
+    @Override
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        logger.debug("doOut");
+        facet = ((FLYSArtifact)artifact).getNativeFacet(facet);
+        if (facet != null) {
+            Calculation report = (Calculation)facet.getData(artifact, context);
+            report.toXML(result, context.getMeta());
+        }
+    }
+
+    @Override
+    public void generate() throws IOException {
+        logger.debug("generate");
+        XMLUtils.toStream(result, out);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/StyledXYSeries.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,91 @@
+package de.intevation.flys.exports;
+
+import java.awt.BasicStroke;
+import java.awt.Color;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+
+import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
+import org.jfree.data.xy.XYSeries;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+public class StyledXYSeries extends XYSeries {
+
+    public static final String XPATH_LINE_COLOR =
+        "/theme/field[@name='linecolor']/@default";
+
+    public static final String XPATH_LINE_SIZE =
+        "/theme/field[@name='linesize']/@default";
+
+
+    protected Document theme;
+
+
+    private static final Logger logger = Logger.getLogger(StyledXYSeries.class);
+
+
+
+    public StyledXYSeries(String key, Document theme) {
+        super(key);
+        this.theme = theme;
+    }
+
+
+    public XYLineAndShapeRenderer applyTheme(XYLineAndShapeRenderer r, int idx){
+        applyLineColor(r, idx);
+        applyLineSize(r, idx);
+
+        r.setSeriesLinesVisible(idx, true);
+        r.setSeriesShapesVisible(idx, false);
+
+        return r;
+    }
+
+
+    protected void applyLineColor(XYLineAndShapeRenderer r, int idx) {
+        String color = XMLUtils.xpathString(theme, XPATH_LINE_COLOR, null);
+
+        if (color == null || color.length() == 0) {
+            return;
+        }
+
+        String[] rgb = color.split(",");
+
+        try {
+            Color c = new Color(
+                Integer.valueOf(rgb[0].trim()),
+                Integer.valueOf(rgb[1].trim()),
+                Integer.valueOf(rgb[2].trim()));
+
+            logger.debug("Set series paint color: " + c.toString());
+
+            r.setSeriesPaint(idx, c);
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn("Unable to set color from string: '" + color + "'");
+        }
+    }
+
+
+    protected void applyLineSize(XYLineAndShapeRenderer r, int idx) {
+        String size = XMLUtils.xpathString(theme, XPATH_LINE_SIZE, null);
+
+        if (size == null || size.length() == 0) {
+            return;
+        }
+
+        try {
+            r.setSeriesStroke(
+                idx,
+                new BasicStroke(Integer.valueOf(size)));
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn("Unable to set line size from string: '" + size + "'");
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,151 @@
+package de.intevation.flys.exports;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.data.xy.XYSeries;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.state.Facet;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.WKms;
+
+import de.intevation.flys.utils.DataUtil;
+
+
+/**
+ * An OutGenerator that generates w differences curves.
+ */
+public class WDifferencesCurveGenerator
+extends      LongitudinalSectionGenerator
+implements   FacetTypes
+{
+    /** The logger that is used in this generator. */
+    private static Logger logger =
+        Logger.getLogger(WDifferencesCurveGenerator.class);
+
+    public static final String I18N_CHART_TITLE =
+        "chart.w_differences.title";
+
+    public static final String I18N_CHART_SUBTITLE =
+        "chart.w_differences.subtitle";
+
+    public static final String I18N_2YAXIS_LABEL =
+        "chart.w_differences.yaxis.second.label";
+
+    // TODO proper i18n.
+    public static final String I18N_CHART_TITLE_DEFAULT  = "W-Differenzen";
+    public static final String I18N_XAXIS_LABEL_DEFAULT  = "km";
+    public static final String I18N_YAXIS_LABEL_DEFAULT  = "W [NN + m]";
+
+
+    /**
+     * Add a subtitle to Chart.
+     * @param chart Chart to add subtitle to.
+     */
+    @Override
+    protected void addSubtitles(JFreeChart chart) {
+        String subtitle = msg(I18N_CHART_SUBTITLE, "");
+        chart.addSubtitle(new TextTitle(subtitle));
+    }
+
+
+    /**
+     * Add (themed) data for chart generation.
+     */
+    public void doOut(Artifact artifact, Facet facet, Document attr) {
+        String name = facet.getName();
+
+        logger.debug("WDifferencesCurveGenerator.doOut: " + name);
+
+        if (name == null) {
+            logger.error("No facet name for doOut(). No output generated!");
+            return;
+        }
+
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+        Facet        f    = flys.getNativeFacet(facet);
+
+        if (f == null) {
+            return;
+        }
+
+        if (name.equals(W_DIFFERENCES)) {
+            doWDifferencesOut((WKms) f.getData(artifact, context), f.getDescription(), attr);
+        }
+        else {
+            logger.warn("Unknown facet name: " + name);
+            return;
+        }
+    }
+
+
+    /**
+     * Add items to dataseries which describes the differences.
+     */
+    protected void doWDifferencesOut(WKms wkms, String seriesName, Document theme) {
+        logger.debug("WDifferencesCurveGenerator.doWDifferencesOut");
+        if (wkms == null) {
+            logger.warn("No data to add to WDifferencesChart.");
+            return;
+         }
+
+        int size = wkms.size();
+        XYSeries series = new StyledXYSeries(seriesName, theme);
+
+        if (logger.isDebugEnabled()) {
+            if (wkms.size() > 0) {
+                logger.debug("Generate series: " + series.getKey());
+                logger.debug("Start km: " + wkms.getKm(0));
+                logger.debug("End   km: " + wkms.getKm(size-1));
+                logger.debug("Values  : " + size);
+            }
+        }
+
+        for (int i = 0; i < size; i++) {
+            series.add(wkms.getKm(i), wkms.getW(i));
+        }
+
+        addFirstAxisSeries(series);
+        if (DataUtil.guessWaterIncreasing(wkms)) {
+            setInverted(true);
+        }
+    }
+
+
+    /**
+     * 
+     */
+    @Override
+    public JFreeChart generateChart() {
+        JFreeChart chart = super.generateChart();
+        if (chart != null && chart.getPlot() != null) {
+            XYPlot plot = (XYPlot) chart.getPlot();
+            plot.setRangeZeroBaselineVisible(true);
+        }
+        return chart;
+    }
+
+    /**
+     * Get name of series (displayed in legend).
+     * @return name of the series.
+     */
+    protected String getSeriesName(WKms wqkms, String mode) {
+        String name   = wqkms.getName();
+        String prefix = (name != null && name.indexOf(mode) >= 0)
+                      ? null
+                      : mode;
+
+        return (prefix != null && prefix.length() > 0)
+                ? prefix + "(" + name +")"
+                : name;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveInfoGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,15 @@
+package de.intevation.flys.exports;
+
+
+/**
+ * A ChartInfoGenerator that generates meta information for specific
+ * w differences.
+ */
+public class WDifferencesCurveInfoGenerator
+extends      ChartInfoGenerator
+{
+    public WDifferencesCurveInfoGenerator() {
+        super(new WDifferencesCurveGenerator());
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,161 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.WKms;
+
+import de.intevation.flys.utils.Formatter;
+
+/**
+ * (CSV)Exporter for WDifferences.
+ */
+public class WDifferencesExporter extends AbstractExporter {
+
+    /** The logger used in this exporter. */
+    private static Logger logger = Logger.getLogger(WDifferencesExporter.class);
+
+
+    public static final String CSV_KM_HEADER =
+        "export.w_differences.csv.header.km";
+
+    public static final String CSV_W_HEADER =
+        "export.w_differences.csv.header.w";
+
+    public static final String DEFAULT_CSV_KM_HEADER = "Fluss-Km";
+    public static final String DEFAULT_CSV_W_HEADER  = "W [NN + m]";
+
+
+    /** The storage that contains all WKms objects for the different facets. */
+    protected List<WKms[]> data;
+
+
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("WDifferencesExporter.init");
+
+        super.init(request, out, context);
+
+        this.data = new ArrayList<WKms[]>();
+    }
+
+
+    /**
+     * Genereate data in csv format.
+     */
+    @Override
+    public void generate()
+    throws IOException
+    {
+        logger.debug("WDifferencesExporter.generate");
+
+        if (facet == null) {
+            throw new IOException("invalid (null) facet for exporter");
+        }
+        else if (facet.equals(AbstractExporter.FACET_CSV)) {
+            generateCSV();
+        }
+        else {
+            throw new IOException("invalid facet (" + facet + ") for exporter");
+        }
+    }
+
+
+    /**
+     * Adds given data.
+     * @param d either a WKms or a CalculationResult to add to data.
+     */
+    @Override
+    protected void addData(Object d) {
+        if (d instanceof CalculationResult) {
+            d = ((CalculationResult)d).getData();
+            if (d instanceof WKms []) {
+                data.add((WKms [])d);
+            }
+        }
+        else if (d instanceof WKms) {
+            data.add(new WKms[] { (WKms) d });
+        }
+    }
+
+
+    /**
+     * Lets writer write all data (including header).
+     * @param writer Writer to write data with.
+     */
+    @Override
+    protected void writeCSVData(CSVWriter writer) {
+        logger.info("WDifferencesExporter.writeData");
+
+        writeCSVHeader(writer);
+
+        for (WKms[] tmp: data) {
+            for (WKms wkms: tmp) {
+                wKms2CSV(writer, wkms);
+            }
+        }
+    }
+
+
+    /**
+     * Lets csvwriter write the header (first line in file).
+     * @param write Writer to write header with.
+     */
+    protected void writeCSVHeader(CSVWriter writer) {
+        logger.info("WDifferencesExporter.writeCSVHeader");
+
+        writer.writeNext(new String[] {
+            msg(CSV_KM_HEADER, DEFAULT_CSV_KM_HEADER),
+            msg(CSV_W_HEADER, DEFAULT_CSV_W_HEADER)
+        });
+    }
+
+
+    protected void wKms2CSV(CSVWriter writer, WKms wkms) {
+        logger.debug("WDifferencesExporter.wQKms2CSV");
+
+        NumberFormat kmf  = getKmFormatter();
+        NumberFormat wf   = getWFormatter();
+        int          size = wkms.size();
+
+        for (int i = 0; i < size; i ++) {
+
+            writer.writeNext(new String[] {
+                kmf.format(wkms.getKm(i)),
+                wf.format(wkms.getW(i))
+            });
+        }
+    }
+
+
+    /**
+     * Returns the number formatter for kilometer values.
+     *
+     * @return the number formatter for kilometer values.
+     */
+    protected NumberFormat getKmFormatter() {
+        return Formatter.getWaterlevelKM(context);
+    }
+
+
+    /**
+     * Returns the number formatter for W values.
+     *
+     * @return the number formatter for W values.
+     */
+    protected NumberFormat getWFormatter() {
+        return Formatter.getWaterlevelW(context);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WaterlevelExporter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,221 @@
+package de.intevation.flys.exports;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Document;
+
+import org.apache.log4j.Logger;
+
+import au.com.bytecode.opencsv.CSVWriter;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.CalculationResult;
+import de.intevation.flys.artifacts.model.WQCKms;
+import de.intevation.flys.artifacts.model.WQKms;
+
+import de.intevation.flys.utils.Formatter;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WaterlevelExporter extends AbstractExporter {
+
+    /** The logger used in this exporter.*/
+    private static Logger logger = Logger.getLogger(WaterlevelExporter.class);
+
+
+    public static final String FACET_WST = "wst";
+
+
+    public static final String CSV_KM_HEADER =
+        "export.waterlevel.csv.header.km";
+
+    public static final String CSV_W_HEADER =
+        "export.waterlevel.csv.header.w";
+
+    public static final String CSV_Q_HEADER =
+        "export.waterlevel.csv.header.q";
+
+    public static final String DEFAULT_CSV_KM_HEADER = "Fluss-Km";
+    public static final String DEFAULT_CSV_W_HEADER  = "W [NN + m]";
+    public static final String DEFAULT_CSV_Q_HEADER  = "Q [m\u00b3/s]";
+
+
+    /** The storage that contains all WQKms objects for the different facets.*/
+    protected List<WQKms[]> data;
+
+
+    public void init(Document request, OutputStream out, CallContext context) {
+        logger.debug("WaterlevelExporter.init");
+
+        super.init(request, out, context);
+
+        this.data = new ArrayList<WQKms[]>();
+    }
+
+
+    @Override
+    public void generate()
+    throws IOException
+    {
+        logger.debug("WaterlevelExporter.generate");
+
+        if (facet != null && facet.equals(AbstractExporter.FACET_CSV)) {
+            generateCSV();
+        }
+        else if (facet != null && facet.equals(FACET_WST)) {
+            generateWST();
+        }
+        else {
+            throw new IOException("invalid facet for exporter");
+        }
+    }
+
+
+    @Override
+    protected void addData(Object d) {
+        if (d instanceof CalculationResult) {
+            d = ((CalculationResult)d).getData();
+            if (d instanceof WQKms []) {
+                data.add((WQKms [])d);
+            }
+        }
+    }
+
+
+    @Override
+    protected void writeCSVData(CSVWriter writer) {
+        logger.info("WaterlevelExporter.writeData");
+
+        writeCSVHeader(writer);
+
+        for (WQKms[] tmp: data) {
+            for (WQKms wqkms: tmp) {
+                wQKms2CSV(writer, wqkms);
+            }
+        }
+    }
+
+
+    protected void writeCSVHeader(CSVWriter writer) {
+        logger.info("WaterlevelExporter.writeCSVHeader");
+
+        writer.writeNext(new String[] {
+            msg(CSV_KM_HEADER, DEFAULT_CSV_KM_HEADER),
+            msg(CSV_W_HEADER, DEFAULT_CSV_W_HEADER),
+            msg(CSV_Q_HEADER, DEFAULT_CSV_Q_HEADER)
+        });
+    }
+
+
+    protected void wQKms2CSV(CSVWriter writer, WQKms wqkms) {
+        logger.debug("WaterlevelExporter.wQKms2CSV");
+
+        NumberFormat kmf = getKmFormatter();
+        NumberFormat wf  = getWFormatter();
+        NumberFormat qf  = getQFormatter();
+
+        int      size   = wqkms.size();
+        double[] result = new double[3];
+
+        for (int i = 0; i < size; i ++) {
+            result = wqkms.get(i, result);
+
+            writer.writeNext(new String[] {
+                kmf.format(result[2]),
+                wf.format(result[0]),
+                qf.format(result[1])
+            });
+        }
+    }
+
+
+    /**
+     * Generates the output in WST format.
+     */
+    protected void generateWST()
+    throws    IOException
+    {
+        logger.info("WaterlevelExporter.generateWST");
+
+        int cols = data.get(0).length;
+        WstWriter writer = new WstWriter(cols);
+
+        writeWSTData(writer);
+
+        writer.write(out);
+    }
+
+
+    protected void writeWSTData(WstWriter writer) {
+        logger.debug("WaterlevelExporter.writeWSTData");
+
+        double[] result = new double[4];
+
+        for (WQKms[] tmp: data) {
+            for (WQKms wqkms: tmp) {
+                int size = wqkms != null ? wqkms.size() : 0;
+
+                addWSTColumn(writer, wqkms);
+
+                for (int i = 0; i < size; i++) {
+                    result = wqkms.get(i, result);
+
+                    writer.add(result);
+                }
+
+                if (wqkms instanceof WQCKms) {
+                    addWSTColumn(writer, wqkms);
+
+                    for (int c = 0; c < size; c++) {
+                        result = wqkms.get(c, result);
+
+                        writer.addCorrected(result);
+                    }
+                }
+            }
+        }
+    }
+
+
+    protected void addWSTColumn(WstWriter writer, WQKms wqkms) {
+        writer.addColumn(wqkms.getName());
+    }
+
+
+    /**
+     * Returns the number formatter for kilometer values.
+     *
+     * @return the number formatter for kilometer values.
+     */
+    protected NumberFormat getKmFormatter() {
+        return Formatter.getWaterlevelKM(context);
+    }
+
+
+    /**
+     * Returns the number formatter for W values.
+     *
+     * @return the number formatter for W values.
+     */
+    protected NumberFormat getWFormatter() {
+        return Formatter.getWaterlevelW(context);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values.
+     *
+     * @return the number formatter for Q values.
+     */
+    protected NumberFormat getQFormatter() {
+        return Formatter.getWaterlevelQ(context);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WstWriter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,237 @@
+package de.intevation.flys.exports;
+
+import java.io.BufferedWriter;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.WstLine;
+
+
+/**
+ * A writer that creates WSTs.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WstWriter {
+
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(WstWriter.class);
+
+
+    /** The default unit that is written into the header of the WST.*/
+    public static final String DEFAULT_UNIT = "Wassserstand [NN + m]";
+
+
+    /** The lines that need to be included for the export.*/
+    protected Map<Double, WstLine> lines;
+
+    /** The column names.*/
+    protected List<String> columnNames;
+
+    /** The locale used to format the values.*/
+    protected Locale locale;
+
+    /** The number of discharge columns.*/
+    protected int cols;
+
+    /** The last Q values.*/
+    protected double[] qs;
+
+
+
+    /**
+     * This constructor creates a new WstWriter with an OutputStream and a
+     * number of Q columns.
+     *
+     * @param out The output stream where the WST is written to.
+     * @param cols The number of columns of the resulting WST.
+     */
+    public WstWriter(int cols) {
+        this.columnNames = new ArrayList<String>(cols);
+        this.lines       = new HashMap<Double, WstLine>();
+        this.qs          = new double[cols];
+        this.locale      = Locale.US;
+    }
+
+
+    /**
+     * This method is used to create the WST from the data that has been
+     * inserted using add(double[]) before.
+     */
+    public void write(OutputStream out) {
+        logger.info("WstWriter.write");
+
+        PrintWriter writer = new PrintWriter(
+            new BufferedWriter(
+                new OutputStreamWriter(out)));
+
+        this.qs = new double[cols];
+
+        writeHeader(writer);
+
+        Collection<WstLine> collection = new TreeMap(lines).values();
+
+        for (WstLine line: collection) {
+            writeWLine(writer, line);
+        }
+
+        writer.flush();
+        writer.close();
+    }
+
+
+    /**
+     * This method is used to add a new line to the WST.
+     *
+     * @param wqkms A 3dim double array with [W,Q, KM].
+     */
+    public void add(double[] wqkms) {
+        Double km = wqkms[2];
+
+        WstLine line = lines.get(km);
+
+        if (line == null) {
+            line = new WstLine(km.doubleValue());
+            lines.put(km, line);
+        }
+
+        line.add(wqkms[0], wqkms[1]);
+    }
+
+
+    public void addCorrected(double[] wqckms) {
+        Double km = wqckms[2];
+
+        WstLine line = lines.get(km);
+
+        if (line == null) {
+            line = new WstLine(km.doubleValue());
+            lines.put(km, line);
+        }
+
+        line.add(wqckms[3], wqckms[1]);
+    }
+
+
+    /**
+     * Adds a further column name.
+     *
+     * @param name The name of the new column.
+     */
+    public void addColumn(String name) {
+        if (name != null) {
+            cols++;
+
+            String basename = name;
+
+            int i = 0;
+            while (columnNames.contains(name)) {
+                name = basename + "_" + i++;
+
+                if (name.length() > 9) {
+                    name = name.substring(name.length() - 9);
+                }
+            }
+
+            columnNames.add(name);
+        }
+    }
+
+
+    /**
+     * This method writes the header of the WST.
+     *
+     * @param writer The PrintWriter that creates the output.
+     */
+    protected void writeHeader(PrintWriter writer) {
+        logger.debug("WstWriter.writeHeader");
+
+        writer.println(cols);
+        writer.print("        ");
+
+        for (String columnName: columnNames) {
+            writer.printf(locale, "%9s", columnName);
+        }
+
+        writer.println();
+
+        writer.write("*   KM     ");
+        writer.write(DEFAULT_UNIT);
+        writer.println();
+    }
+
+
+    /**
+     * This method writes a line with W values and a certain kilometer.
+     *
+     * @param writer The PrintWriter that is used to create the output.
+     * @param line The WstLine that should be written to the output.
+     */
+    protected void writeWLine(PrintWriter writer, WstLine line) {
+        double   km  = line.getKm();
+        double[] qs  = line.getQs();
+        int      num = line.getSize();
+
+        if (dischargesChanged(qs)) {
+            writeQLine(writer, qs);
+        }
+
+        writer.printf(locale, "%8.3f", km);
+
+        for (int i = 0; i < num; i++) {
+            writer.printf(locale, "%9.2f", line.getW(i));
+        }
+
+        writer.println();
+    }
+
+
+    /**
+     * Writes a discharge line (Q values) into a WST.
+     *
+     * @param qs the Q values for the next range.
+     */
+    protected void writeQLine(PrintWriter writer, double[] qs) {
+        writer.write("*\u001f      ");
+
+        for (int i = 0; i < qs.length; i++) {
+            this.qs[i] = qs[i];
+
+            writer.printf(locale, "%9.2f", qs[i]);
+        }
+
+        writer.println();
+    }
+
+
+    /**
+     * This method determines if a Q has changed from the last line to the
+     * current one.
+     *
+     * @param newQs The Q values of the next line.
+     *
+     * @return true, if a Q value have changed, otherwise false.
+     */
+    protected boolean dischargesChanged(double[] newQs) {
+        // XXX maybe there is a way to do this faster
+        for (int i = 0; i < cols; i++) {
+            if (Math.abs(newQs[i] - qs[i]) >= 0.001) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,389 @@
+package de.intevation.flys.exports;
+
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Stroke;
+
+import java.io.IOException;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.ChartFactory;
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.plot.PlotOrientation;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
+import org.jfree.data.Range;
+import org.jfree.data.xy.XYDataset;
+import org.jfree.data.xy.XYSeries;
+import org.jfree.data.xy.XYSeriesCollection;
+
+import org.jfree.ui.RectangleInsets;
+
+import de.intevation.flys.exports.ChartExportHelper;
+
+
+/**
+ * An abstract base class for creating XY charts.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public abstract class XYChartGenerator extends ChartGenerator {
+
+    /** The logger that is used in this generator. */
+    private static Logger logger = Logger.getLogger(XYChartGenerator.class);
+
+
+    /** SeriesCollection used for the first axis. */
+    protected XYSeriesCollection first;
+
+    /** SeriesCollection used for the second axis. */
+    protected XYSeriesCollection second;
+
+    public static final Color DEFAULT_GRID_COLOR      = Color.GRAY;
+    public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f;
+
+
+    /**
+     * Returns the title of a chart.
+     *
+     * @return the title of a chart.
+     */
+    protected abstract String getChartTitle();
+
+    /**
+     * Returns the X-Axis label of a chart.
+     *
+     * @return the X-Axis label of a chart.
+     */
+    protected abstract String getXAxisLabel();
+
+    /**
+     * Returns the Y-Axis label of a chart.
+     *
+     * @return the Y-Axis label of a chart.
+     */
+    protected abstract String getYAxisLabel();
+
+
+    public void generate()
+    throws IOException
+    {
+        logger.debug("XYChartGenerator.generate");
+
+        JFreeChart chart = generateChart();
+
+        int[] size = getSize();
+
+        ChartExportHelper.exportImage(
+            out,
+            chart,
+            "png",
+            size[0], size[1]);
+    }
+
+
+    public JFreeChart generateChart() {
+        logger.debug("XYChartGenerator.generateChart");
+
+        JFreeChart chart = ChartFactory.createXYLineChart(
+            getChartTitle(),
+            getXAxisLabel(),
+            getYAxisLabel(),
+            null,
+            PlotOrientation.VERTICAL,
+            true,
+            false,
+            false);
+
+        chart.setBackgroundPaint(Color.WHITE);
+        chart.getPlot().setBackgroundPaint(Color.WHITE);
+
+        XYPlot plot = (XYPlot) chart.getPlot();
+
+        addDatasets(plot);
+        addSubtitles(chart);
+        adjustPlot(plot);
+        adjustAxes(plot);
+
+        removeEmptyRangeAxes(plot);
+
+        autoZoom(plot);
+
+        applyThemes(plot);
+
+        return chart;
+    }
+
+
+    protected void addDatasets(XYPlot plot) {
+        if (first != null) {
+            logger.debug("Set the first axis dataset.");
+            plot.setDataset(0, first);
+        }
+        if (second != null) {
+            logger.debug("Set the second axis dataset.");
+            plot.setDataset(1, second);
+        }
+    }
+
+
+    public void addFirstAxisSeries(XYSeries series) {
+        if (first == null) {
+            first = new XYSeriesCollection();
+        }
+
+        if (series != null) {
+            first.addSeries(series);
+        }
+    }
+
+
+    public void addSecondAxisSeries(XYSeries series) {
+        if (second == null) {
+            second = new XYSeriesCollection();
+        }
+
+        if (series != null) {
+            second.addSeries(series);
+        }
+    }
+
+
+    private void removeEmptyRangeAxes(XYPlot plot) {
+        if (first == null) {
+            plot.setRangeAxis(0, null);
+        }
+
+        if (second == null) {
+            plot.setRangeAxis(1, null);
+        }
+    }
+
+
+    /**
+     * This method zooms the plot to the specified ranges in the attribute
+     * document or to the ranges specified by the min/max values in the
+     * datasets. <b>Note:</b> We determine the range manually if no zoom ranges
+     * are given, because JFreeCharts auto-zoom adds a margin to the left and
+     * right of the data area.
+     *
+     * @param plot The XYPlot.
+     */
+    protected void autoZoom(XYPlot plot) {
+        logger.debug("Zoom to specified ranges.");
+
+        Range xrange = getDomainAxisRange();
+        Range yrange = getValueAxisRange();
+
+        for (int i = 0, num = plot.getDatasetCount(); i < num; i++) {
+            XYDataset dataset = plot.getDataset(i);
+
+            if (dataset == null) {
+                continue;
+            }
+
+            Range[]   ranges  = getRangesForDataset(dataset);
+
+            if (i == 0) {
+                ValueAxis xaxis = plot.getDomainAxis();
+                zoomX(plot, xaxis, ranges[0], xrange);
+            }
+
+            ValueAxis yaxis = plot.getRangeAxis(i);
+
+            if (yaxis == null) {
+                continue;
+            }
+
+            zoomY(plot, yaxis, ranges[1], yrange);
+        }
+    }
+
+
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        return zoom(plot, axis, range, x);
+    }
+
+
+    protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        return zoom(plot, axis, range, x);
+    }
+
+
+    /**
+     * Zooms the x axis to the range specified in the attribute document.
+     *
+     * @param plot The XYPlot.
+     * @param axis The axis the shoud be modified.
+     * @param range The whole range specified by a dataset.
+     * @param x A user defined range (null permitted).
+     *
+     * @return true, if a zoom range was specified, otherwise false.
+     */
+    protected boolean zoom(XYPlot plot, ValueAxis axis, Range range, Range x) {
+        if (x != null) {
+            double min  = range.getLowerBound();
+            double max  = range.getUpperBound();
+            double diff = max > min ? max - min : min - max;
+
+            Range computed = new Range(
+                min + x.getLowerBound() * diff,
+                min + x.getUpperBound() * diff);
+
+            axis.setRangeWithMargins(computed);
+
+            logger.debug("Zoom axis to: " + computed);
+
+            return true;
+        }
+
+        axis.setRangeWithMargins(range);
+        return false;
+    }
+
+
+    /**
+     * This method extracts the minimum and maximum values for x and y axes.
+     *
+     * @param dataset The dataset that should be observed.
+     *
+     * @return a Range[] as follows: [x-Range, y-Range].
+     */
+    public static Range[] getRangesForDataset(XYDataset dataset) {
+        double[] xr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
+        double[] yr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
+
+        int sCount = dataset.getSeriesCount();
+
+        for (int i = 0; i < sCount; i++) {
+            int iCount = dataset.getItemCount(i);
+
+            for (int j = 0; j < iCount; j++) {
+                double x = dataset.getX(i, j).doubleValue();
+                double y = dataset.getY(i, j).doubleValue();
+
+                if (!Double.isNaN(x)) {
+                    xr[0] = xr[0] < x ? xr[0] : x;
+                    xr[1] = xr[1] > x ? xr[1] : x;
+                }
+
+                if (!Double.isNaN(y)) {
+                    yr[0] = yr[0] < y ? yr[0] : y;
+                    yr[1] = yr[1] > y ? yr[1] : y;
+                }
+            }
+        }
+
+        // this is only required, if there are no items in the dataset.
+        xr[0] = xr[0] < xr[1] ? xr[0] : xr[1];
+        xr[1] = xr[1] > xr[0] ? xr[1] : xr[0];
+        yr[0] = yr[0] < yr[1] ? yr[0] : yr[1];
+        yr[1] = yr[1] > yr[0] ? yr[1] : yr[0];
+
+        return new Range[] {new Range(xr[0], xr[1]), new Range(yr[0], yr[1])};
+    }
+
+
+    /**
+     * Adjusts the axes of a plot.
+     *
+     * @param plot The XYPlot of the chart.
+     */
+    protected void adjustAxes(XYPlot plot) {
+        NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
+
+        yAxis.setAutoRangeIncludesZero(false);
+    }
+
+
+    protected void adjustPlot(XYPlot plot) {
+        Stroke gridStroke = new BasicStroke(
+            DEFAULT_GRID_LINE_WIDTH,
+            BasicStroke.CAP_BUTT,
+            BasicStroke.JOIN_MITER,
+            3.0f,
+            new float[] { 3.0f },
+            0.0f);
+
+        plot.setDomainGridlineStroke(gridStroke);
+        plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR);
+        plot.setDomainGridlinesVisible(true);
+
+        plot.setRangeGridlineStroke(gridStroke);
+        plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR);
+        plot.setRangeGridlinesVisible(true);
+
+        plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d));
+
+        if (plot.getDataset(0) != null) {
+            plot.mapDatasetToRangeAxis(0, 0);
+        }
+
+        if (plot.getDataset(1) != null) {
+            plot.mapDatasetToRangeAxis(1, 1);
+        }
+    }
+
+
+    protected void addSubtitles(JFreeChart chart) {
+        // override this method in subclasses that need subtitles
+    }
+
+
+    protected void applyThemes(XYPlot plot) {
+        if (first != null) {
+            applyThemes(plot, first, 0);
+        }
+
+        if (second != null) {
+            applyThemes(plot, second, 1);
+        }
+    }
+
+
+    protected void applyThemes(XYPlot plot, XYSeriesCollection dataset, int i) {
+        XYLineAndShapeRenderer r = getRenderer(plot, i);
+
+        for (int s = 0, num = dataset.getSeriesCount(); s < num; s++) {
+            XYSeries series = dataset.getSeries(s);
+
+            if (series instanceof StyledXYSeries) {
+                ((StyledXYSeries) series).applyTheme(r, s);
+            }
+        }
+
+        plot.setRenderer(i, r);
+    }
+
+
+    protected XYLineAndShapeRenderer getRenderer(XYPlot plot, int idx) {
+        XYLineAndShapeRenderer r =
+            (XYLineAndShapeRenderer) plot.getRenderer(idx);
+
+        if (r != null) {
+            return r;
+        }
+
+        if (idx == 0) {
+            logger.warn("No default renderer set!");
+            return new XYLineAndShapeRenderer();
+        }
+
+        r = (XYLineAndShapeRenderer) plot.getRenderer(0);
+
+        try {
+            return (XYLineAndShapeRenderer) r.clone();
+        }
+        catch (CloneNotSupportedException cnse) {
+            logger.warn(cnse, cnse);
+        }
+
+        logger.warn("No applicalable renderer found!");
+
+        return new XYLineAndShapeRenderer();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,322 @@
+package de.intevation.flys.jfree;
+
+import org.apache.log4j.Logger;
+
+import java.util.Iterator;
+
+import java.awt.Shape;
+import java.awt.geom.Rectangle2D;
+import java.awt.geom.Line2D;
+
+import org.jfree.chart.annotations.XYTextAnnotation;
+import org.jfree.chart.axis.ValueAxis;
+import org.jfree.chart.util.LineUtilities;
+import org.jfree.chart.plot.PlotOrientation;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.entity.XYAnnotationEntity;
+import org.jfree.chart.plot.PlotRenderingInfo;
+import org.jfree.chart.ChartRenderingInfo;
+import org.jfree.chart.plot.Plot;
+
+import org.jfree.data.Range;
+
+import org.jfree.text.TextUtilities;
+
+import org.jfree.ui.RectangleEdge;
+import org.jfree.ui.TextAnchor;
+
+
+/**
+ * Custom Annotations class that is drawn only if no collisions with other
+ * already drawn CustomAnnotations in current plot are found.
+ * Draws a given text and a line to it from either axis.
+ */
+public class StickyAxisAnnotation extends XYTextAnnotation {
+
+    /** Logger for this class. */    
+    private static Logger logger =
+        Logger.getLogger(StickyAxisAnnotation.class);
+
+    /** Simplified view on axes. */
+    public static enum SimpleAxis {
+        X_AXIS, /** Usually "horizontal". */
+        Y_AXIS  /** Usually "vertical". */
+    }
+
+    /** Which axis to stick to. */
+    protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
+
+    /** The 1-dimensional position of this annotation. */
+    protected float pos;
+
+
+    /**
+     * Trivial constructor.
+     *
+     * @param text Text to display.
+     * @param x    X-position in dataspace (typical horizontal, in km).
+     * @param y    Y-position in dataspace (typical vertical, in m).
+     * @deprecated
+     */
+    public StickyAxisAnnotation(String text, float x, float y) {
+        super(text, x, y);
+        setStickyAxis(SimpleAxis.X_AXIS);
+    }
+
+
+    /**
+     * Constructor with implicit sticky x-axis.
+     * @param text       the text to display.
+     * @param pos        the position at which to draw the text and mark.
+     */
+    public StickyAxisAnnotation(String text, float pos) {
+        this(text, pos, pos, SimpleAxis.X_AXIS);
+    }
+
+
+    /**
+     * Constructor with given explicit axis.
+     * @param text       the text to display.
+     * @param pos        the position at which to draw the text and mark.
+     * @param stickyAxis the axis at which to stick (and to which 'pos' is
+     *                   relative).
+     */
+    public StickyAxisAnnotation(String text, float pos, SimpleAxis stickAxis) {
+        super(text, pos, pos);
+        setStickyAxis(stickAxis);
+        this.pos = pos;
+    }
+
+    /**
+     * Legacy-Constructor.
+     * @deprecated
+     */
+    public StickyAxisAnnotation(String text, float x, float y,
+            SimpleAxis stickAxis) {
+        super(text, x, y);
+        setStickyAxis(stickAxis);
+        this.pos = x;
+    }
+
+
+    /**
+     * Sets the "sticky axis" (whether to draw annotations at the
+     * X- or the Y-Axis.
+     *
+     * @param stickyAxis axis to stick to.
+     */
+    public void setStickyAxis(SimpleAxis stickyAxis) {
+        this.stickyAxis = stickyAxis;
+        if (stickyAxis == SimpleAxis.X_AXIS) {
+            this.setRotationAngle(270f * (Math.PI / 180f));
+            this.setRotationAnchor(TextAnchor.CENTER_LEFT);
+            this.setTextAnchor(TextAnchor.CENTER_LEFT);
+        } else {
+            this.setRotationAngle(0f * (Math.PI / 180f));
+            this.setRotationAnchor(TextAnchor.CENTER_LEFT);
+            this.setTextAnchor(TextAnchor.CENTER_LEFT);
+        }
+    }
+
+
+    /**
+     * Draws a small line at axis where this annotation resides.
+     *
+     * @param g2          the graphics device.
+     * @param dataArea    the data area.
+     * @param domainAxis  the domain axis.
+     * @param rangeAxis   the range axis.
+     * @param domainEdge  the domain edge.
+     * @param rangeEdge   the range edge.
+     * @param orientation the plot orientation.
+     */
+    protected void drawAxisMark(
+            java.awt.Graphics2D g2,
+            java.awt.geom.Rectangle2D dataArea,
+            ValueAxis domainAxis,
+            ValueAxis rangeAxis,
+            RectangleEdge domainEdge,
+            RectangleEdge rangeEdge,
+            PlotOrientation orientation) {
+        float j2DX1 = 0.0f;
+        float j2DX2 = 0.0f;
+        float j2DY1 = 0.0f;
+        float j2DY2 = 0.0f;
+        float x = (float) getX();
+        float y = (float) getY();
+        /* When dependent on X/Y-Axis and orientation, following
+           can be used as a base:
+        if (orientation == PlotOrientation.VERTICAL) {
+            j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea,
+                        domainEdge);
+            j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea,
+                        rangeEdge);
+            j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea,
+                        domainEdge);
+            j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea,
+                        rangeEdge);
+            }
+        else if (orientation == PlotOrientation.HORIZONTAL) {
+            j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea,
+                    domainEdge);
+            j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea,
+                    rangeEdge);
+            j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea,
+                    domainEdge);
+            j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea,
+                    rangeEdge);
+        }
+
+        g2.setPaint(this.paint);
+        g2.setStroke(this.stroke);
+        */
+        if (this.stickyAxis == SimpleAxis.X_AXIS) {
+            j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge);
+            double rangeLow = rangeAxis.getRange().getLowerBound();
+            // Line ends at 1.5% of full distance.
+            j2DY2 = (float) rangeAxis.valueToJava2D(
+                      (1f - 0.015f) * rangeLow + 0.015f * 
+                      rangeAxis.getRange().getUpperBound(),
+                     dataArea, rangeEdge);
+            j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
+            j2DX2 = j2DX1;
+        } else {
+            j2DX1 = (float) RectangleEdge.coordinate(dataArea, rangeEdge);
+            Range domainRange = domainAxis.getRange();
+            double rangeLow = domainRange.getLowerBound();
+            // Line ends at 1.5% of full distance.
+            j2DX2 = (float) domainAxis.valueToJava2D(
+                      (1f - 0.015f) * rangeLow + 0.015f * 
+                      domainRange.getUpperBound(),
+                     dataArea, domainEdge);
+            j2DY1 = (float) rangeAxis.valueToJava2D(pos, dataArea, rangeEdge);
+            j2DY2 = j2DY1;
+        }
+
+        Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
+
+        // line is clipped to avoid JRE bug 6574155, for more info
+        // see JFreeChart bug 2221495
+        boolean visible = LineUtilities.clipLine(line, dataArea);
+        if (visible) {
+            g2.draw(line);
+        }
+    }
+
+
+    /**
+     * Draw the Annotiation if it does not collide with other already drawn
+     * Annotations.
+     *
+     * @param g2            the graphics device.
+     * @param plot          the plot.
+     * @param dataArea      the data area.
+     * @param domainAxis    the domain axis.
+     * @param rangeAxis     the range axis.
+     * @param rendererIndex the render index.
+     * @param info          state information, escpecially collects info about
+     *                      already drawn shapes (and thus annotations), used
+     *                      for collision detection.
+     */
+    @Override
+    public void draw(
+       java.awt.Graphics2D g2,
+       XYPlot plot,
+       java.awt.geom.Rectangle2D dataArea,
+       ValueAxis domainAxis,
+       ValueAxis rangeAxis,
+       int rendererIndex,
+       PlotRenderingInfo info) {
+
+        if (info == null)
+            return;
+
+        if (domainAxis == null || rangeAxis == null
+                || domainAxis.getRange()    == null
+                || rangeAxis.getRange()     == null
+                ) {
+            logger.error("Annotation cannot be drawn (missing axis).");
+            return;
+        }
+
+        // Calculate the bounding box.
+        ChartRenderingInfo chartInfo = info.getOwner();
+
+        PlotOrientation orientation = plot.getOrientation();
+        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
+            plot.getDomainAxisLocation(), orientation);
+        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
+            plot.getRangeAxisLocation(), orientation);
+        float anchorX = 0f;
+        float anchorY = 0.0f;
+        if (this.stickyAxis == SimpleAxis.X_AXIS) {
+            // Text starts at 1.5% of full distance.
+            float rangeLow = (float) rangeAxis.getRange().getLowerBound();
+            float y = rangeLow + 0.02f * ((float)
+                    rangeAxis.getRange().getUpperBound() - rangeLow);
+            setY(y);
+
+            anchorX = (float) domainAxis.valueToJava2D(
+                getX(), dataArea, domainEdge);
+            anchorY = (float) rangeAxis.valueToJava2D(
+                getY(), dataArea, rangeEdge);
+        } else {
+            float rangeLow = (float) domainAxis.getRange().getLowerBound();
+            float x = rangeLow + 0.02f * ((float)
+                    domainAxis.getRange().getUpperBound() - rangeLow);
+            setX(x);
+            anchorX = (float) domainAxis.valueToJava2D(
+                getX(), dataArea, domainEdge);
+            anchorY = (float) rangeAxis.valueToJava2D(
+                getY(), dataArea, rangeEdge);
+        }
+        if (orientation == PlotOrientation.HORIZONTAL) {
+            float tempAnchor = anchorX;
+            anchorX = anchorY;
+            anchorY = tempAnchor;
+        }
+
+        // Always draw the small line at axis.
+        drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge,
+                rangeEdge, orientation);
+
+        g2.setFont(getFont());
+        Shape hotspot = TextUtilities.calculateRotatedStringBounds(
+           getText(), g2, anchorX, anchorY, getTextAnchor(),
+           getRotationAngle(), getRotationAnchor());
+        Rectangle2D hotspotBox = hotspot.getBounds2D();
+        // Check for collisions with other XYAnnotations.
+        for (Iterator i = chartInfo.getEntityCollection().iterator();
+                i.hasNext(); ) {
+            Object next = i.next();
+            // Collision with other stuff than XYAnnotations are okay.
+            if (next instanceof XYAnnotationEntity) {
+                XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
+                if (drawnShape.getArea().intersects(hotspotBox)) {
+                    // Found collision, early stop.
+                    return;
+                }
+            }
+        }
+
+        // Actuall drawing.
+        if (getBackgroundPaint() != null) {
+        g2.setPaint(getBackgroundPaint());
+            g2.fill(hotspot);
+        }
+        g2.setPaint(getPaint());
+        TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
+                getTextAnchor(), getRotationAngle(), getRotationAnchor());
+        // Draw outline.
+        if (false) {
+            g2.setStroke(getOutlineStroke());
+            g2.setPaint(getOutlinePaint());
+            g2.draw(hotspot);
+        }
+
+        // Add info that we have drawn this Annotation.
+        addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL());
+    }
+}
+
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/themes/DefaultTheme.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,167 @@
+package de.intevation.flys.themes;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DefaultTheme implements Theme {
+
+    /** The name of the theme.*/
+    protected String name;
+
+    /** The description of the theme.*/
+    protected String description;
+
+
+    /** The map storing the fields of this theme.*/
+    protected Map<String, ThemeField> fields;
+
+    /** The map storing the attributes of this theme.*/
+    protected Map<String, String> attr;
+
+
+    /**
+     * Initializes the components of this Theme.
+     */
+    public DefaultTheme(String name, String description) {
+        this.name        = name;
+        this.description = description;
+        this.fields      = new HashMap<String, ThemeField>();
+        this.attr        = new HashMap<String, String>();
+    }
+
+
+    public void init(Node config) {
+    }
+
+
+    public String getName() {
+        return name;
+    }
+
+
+    public String getDescription() {
+        return description;
+    }
+
+
+    public void addAttribute(String name, String value) {
+        if (name != null && value != null) {
+            attr.put(name, value);
+        }
+    }
+
+
+    public String getAttribute(String name) {
+        return attr.get(name);
+    }
+
+
+    public void addField(String name, ThemeField field) {
+        if (name != null && field != null) {
+            fields.put(name, field);
+        }
+    }
+
+
+    public void setFieldValue(String name, Object value) {
+        if (name != null && value != null) {
+            ThemeField field = fields.get(name);
+
+            if (field != null) {
+                field.setValue(value);
+            }
+        }
+    }
+
+
+    public ThemeField getField(String name) {
+        return fields.get(name);
+    }
+
+
+    public String getFieldType(String name) {
+        ThemeField field = fields.get(name);
+
+        return field != null ? field.getType() : null;
+    }
+
+
+    public Object getFieldValue(String name) {
+        ThemeField field = fields.get(name);
+
+        return field != null ? field.getValue() : null;
+    }
+
+
+    public Document toXML() {
+        Document doc = XMLUtils.newDocument();
+
+        ElementCreator cr = new ElementCreator(doc, null, null);
+
+        Element theme = cr.create("theme");
+
+        appendAttributes(cr, theme);
+        appendFields(cr, theme);
+
+        doc.appendChild(theme);
+
+        return doc;
+    }
+
+
+    /**
+     * Appends the attributes configured for this theme.
+     *
+     * @param cr The ElementCreator.
+     * @param theme The document root element.
+     */
+    protected void appendAttributes(ElementCreator cr, Element theme) {
+        Iterator<String> iter = attr.keySet().iterator();
+
+        while (iter.hasNext()) {
+            String key = iter.next();
+            String val = getAttribute(key);
+
+            if (key == null || val == null) {
+                continue;
+            }
+
+            cr.addAttr(theme, key, val);
+        }
+    }
+
+
+    /**
+     * Appends the fields configured for this theme.
+     *
+     * @param cr The ElementCreator.
+     * @param theme The document root element.
+     */
+    protected void appendFields(ElementCreator cr, Element theme) {
+        Iterator<String> iter = fields.keySet().iterator();
+
+        while (iter.hasNext()) {
+            String name = iter.next();
+
+            ThemeField field = getField(name);
+
+            Document doc = field.toXML();
+            Node    root = doc.getFirstChild();
+
+            theme.appendChild(theme.getOwnerDocument().importNode(root, true));
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/themes/DefaultThemeField.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,85 @@
+package de.intevation.flys.themes;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DefaultThemeField implements ThemeField {
+
+    protected String name;
+
+    protected Map<String, Object> attr;
+
+
+    public DefaultThemeField(String name) {
+        this.name = name;
+        this.attr = new HashMap<String, Object>();
+    }
+
+
+    public String getName() {
+        return name;
+    }
+
+
+    public String getType() {
+        return (String) getAttribute("type");
+    }
+
+
+    public Object getValue() {
+        return getAttribute("value");
+    }
+
+
+    public void setValue(Object value) {
+        setAttribute("value", value);
+    }
+
+
+    public Object getAttribute(String name) {
+        return attr.get(name);
+    }
+
+
+    public void setAttribute(String name, Object value) {
+        if (name == null || value == null) {
+            return;
+        }
+
+        attr.put(name, value);
+    }
+
+
+    public Document toXML() {
+        Document doc = XMLUtils.newDocument();
+
+        ElementCreator cr = new ElementCreator(doc, null, null);
+
+        Element field = cr.create("field");
+
+        Iterator<String> iter = attr.keySet().iterator();
+
+        while (iter.hasNext()) {
+            String name  = iter.next();
+            String value = (String) getAttribute(name);
+
+            cr.addAttr(field, name, value);
+        }
+
+        doc.appendChild(field);
+
+        return doc;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/themes/Theme.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,110 @@
+package de.intevation.flys.themes;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public interface Theme {
+
+    /**
+     * Method to initialize the theme.
+     *
+     * @param config The configuration node.
+     */
+    void init(Node config);
+
+
+    /**
+     * Returns the name of the theme.
+     *
+     * @return the name of the theme.
+     */
+    String getName();
+
+
+    /**
+     * Returns the description of the theme.
+     *
+     * @return the description of the theme.
+     */
+    String getDescription();
+
+
+    /**
+     * Adds a new attribute.
+     *
+     * @param name The name of the attribute.
+     * @param value The value of the attribute.
+     */
+    void addAttribute(String name, String value);
+
+
+    /**
+     * Returns the value of a specific attribute.
+     *
+     * @param name the name of the attribute.
+     *
+     * @return the value of the attribute <i>name</i>.
+     */
+    String getAttribute(String name);
+
+
+    /**
+     * Adds a new field to the theme.
+     *
+     * @param name The name of the field.
+     * @param field The field.
+     */
+    void addField(String name, ThemeField field);
+
+
+    /**
+     * Sets the value of an field.
+     *
+     * @param name The name of the field.
+     * @param value The new value of the field.
+     */
+    void setFieldValue(String name, Object value);
+
+
+    /**
+     * Returns the field specified by name.
+     *
+     * @param name The name of the desired field.
+     *
+     * @return an field.
+     */
+    ThemeField getField(String name);
+
+
+    /**
+     * Returns the typename of a field.
+     *
+     * @param name the name of the field.
+     *
+     * @return the typename of a field.
+     */
+    String getFieldType(String name);
+
+
+    /**
+     * Returns the value of a field.
+     *
+     * @param name The name of the field.
+     *
+     * @return the value of a field.
+     */
+    Object getFieldValue(String name);
+
+
+    /**
+     * Dumps the theme to XML.
+     *
+     * @return a document.
+     */
+    Document toXML();
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,218 @@
+package de.intevation.flys.themes;
+
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.context.FLYSContext;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ThemeFactory {
+
+    private static Logger logger = Logger.getLogger(ThemeFactory.class);
+
+    private ThemeFactory() {
+    }
+
+
+    /**
+     * Creates a new theme from <i>config</i>.
+     *
+     * @param themeCfg The theme config document that is used to fetch parent
+     * themes.
+     * @param config The theme config node.
+     *
+     * @return a new theme.
+     */
+    public static Theme createTheme(Document themeCfg, Node config) {
+        String name = getName(config);
+        String desc = getDescription(config);
+
+        logger.debug("Create new theme: " + name);
+
+        Theme theme = new DefaultTheme(name, desc);
+
+        parseInherits(themeCfg, config, theme);
+        parseFields(config, theme);
+        parseAttrs(config, theme);
+
+        return theme;
+    }
+
+
+    /**
+     * Returns the theme for a specified output type and facet.
+     *
+     * @param c The FLYSContext that stores the mappings and themes.
+     * @param name The name of the mapping.
+     *
+     * @return a theme.
+     */
+    public static Theme getTheme(FLYSContext c, String name) {
+        if (c == null || name == null) {
+            logger.warn("Cannot search for theme.");
+            return null;
+        }
+
+        Map<String, String> map = (Map<String, String>)
+            c.get(FLYSContext.THEME_MAPPING);
+
+        Map<String, Theme> t = (Map<String, Theme>)
+            c.get(FLYSContext.THEMES);
+
+        if (map == null || map.size() == 0 || t == null || t.size() == 0) {
+            logger.warn("No mappings or themes found. Cannot retrieve theme!");
+            return null;
+        }
+
+        String themeName = map.get(name);
+
+        if (themeName == null) {
+            logger.warn("No theme found for mapping: " + name);
+        }
+
+        return t.get(themeName);
+    }
+
+
+    protected static String getName(Node config) {
+        return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
+    }
+
+
+    protected static String getDescription(Node config) {
+        return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
+    }
+
+
+    protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
+        logger.debug("ThemeFactory.parseInherits");
+
+        NodeList inherits = (NodeList) XMLUtils.xpath(
+            cfg, "inherits/inherit", XPathConstants.NODESET);
+
+        int num = inherits != null ? inherits.getLength() : 0;
+
+        if (num == 0) {
+            logger.debug("Theme does not inherit from other themes.");
+            return;
+        }
+
+        logger.debug("Theme inherits from " + num + " other themes.");
+
+        for (int i = 0; i < num; i++) {
+            Node inherit = inherits.item(i);
+            String from  = (String) XMLUtils.xpath(
+                inherit, "@from", XPathConstants.STRING);
+
+            Node tmp = getThemeNode(themeCfg, from);
+
+            parseInherits(themeCfg, tmp, t);
+            parseFields(tmp, t);
+        }
+    }
+
+
+    protected static Node getThemeNode(Document themeCfg, String name) {
+        if (name == null) {
+            logger.warn("Cannot search theme config without name!");
+            return null;
+        }
+
+        logger.debug("Search for theme: " + name);
+
+        String xpath = "/themes/theme[@name='" + name + "']";
+
+        return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
+    }
+
+
+    protected static void parseFields(Node config, Theme theme) {
+        if (config == null || theme == null) {
+            logger.warn("Parsing fields without node or theme is senseless!");
+            return;
+        }
+
+        NodeList fields = (NodeList) XMLUtils.xpath(
+            config, "fields/field", XPathConstants.NODESET);
+
+        int num = fields != null ? fields.getLength() : 0;
+
+        logger.debug("Found " + num + " own fields in this theme.");
+
+        if (num == 0) {
+            logger.debug("Theme has no own fields.");
+            return;
+        }
+
+        for (int i = 0; i < num; i++) {
+            Node field = fields.item(i);
+
+            addField(theme, field);
+        }
+    }
+
+
+    protected static void addField(Theme theme, Node field) {
+        String name = (String) XMLUtils.xpath(
+            field, "@name", XPathConstants.STRING);
+
+        logger.debug("Add field: " + name);
+
+        NamedNodeMap attrs = field.getAttributes();
+
+        int num = attrs != null ? attrs.getLength() : 0;
+
+        if (num == 0) {
+            logger.warn("This field has no attributes.");
+            return;
+        }
+
+        ThemeField theField = new DefaultThemeField(name);
+
+        for (int i = 0; i < num; i++) {
+            Node attr    = attrs.item(i);
+
+            String key   = attr.getNodeName();
+            String value = attr.getNodeValue();
+
+            theField.setAttribute(key, value);
+        }
+
+        theme.addField(name, theField);
+    }
+
+
+    protected static void parseAttrs(Node config, Theme theme) {
+        NamedNodeMap attrs = config.getAttributes();
+
+        int num = attrs != null ? attrs.getLength() : 0;
+
+        if (num == 0) {
+            logger.debug("Theme has no attributes set.");
+            return;
+        }
+
+        for (int i = 0; i < num; i++) {
+            Node attr = attrs.item(i);
+
+            String name  = attr.getNodeName();
+            String value = attr.getNodeValue();
+
+            theme.addAttribute(name, value);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeField.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,58 @@
+package de.intevation.flys.themes;
+
+import org.w3c.dom.Document;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public interface ThemeField {
+
+    /**
+     * Returns the name of this field.
+     *
+     * @return the name of this field.
+     */
+    String getName();
+
+    /**
+     * Returns the type of this field.
+     *
+     * @return the type of this field.
+     */
+    String getType();
+
+
+    /**
+     * Returns the value of this field.
+     *
+     * @return the value of this field.
+     */
+    Object getValue();
+
+
+    /**
+     * Changes the value of this field.
+     *
+     * @param value The new value.
+     */
+    void setValue(Object value);
+
+
+    /**
+     * Sets the value of an attribute.
+     *
+     * @param name The name of an attribute.
+     * @param value The value of an attribute.
+     */
+    void setAttribute(String name, Object value);
+
+
+    /**
+     * Dumps the field to XML.
+     *
+     * @return a document.
+     */
+    Document toXML();
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/DataUtil.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,36 @@
+package de.intevation.flys.utils;
+
+import java.util.Random;
+
+import de.intevation.flys.artifacts.model.WKms;
+
+public class DataUtil
+{
+    // TODO: resolve duplicate in WQKms
+    public static boolean guessWaterIncreasing(WKms wkms) {
+        return guessWaterIncreasing(wkms, 0.05f);
+    }
+
+    // TODO: resolve duplicate in WQKms
+    public static boolean guessWaterIncreasing(WKms wkms, float factor) {
+        int N = wkms.size();
+        if (N < 2) return false;
+    
+        int samples = (int)(factor*N) + 1;
+    
+        int up = 0;
+    
+        Random rand = new Random();
+    
+        for (int i = 0; i < samples; ++i) {
+            int    pos2 = rand.nextInt(N-1) + 1;
+            if (pos2 == 0) continue;
+            int    pos1 = rand.nextInt(pos2);
+            double w1   = wkms.getW(pos1);
+            double w2   = wkms.getW(pos2);
+            if (w2 > w1) ++up;
+        }
+    
+        return up > samples/2;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/DoubleUtil.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,48 @@
+package de.intevation.flys.utils;
+
+public class DoubleUtil
+{
+    public static final double DEFAULT_STEP_PRECISION = 1e6;
+
+    private DoubleUtil() {
+    }
+
+    public static final double [] explode(double from, double to, double step) {
+        return explode(from, to, step, DEFAULT_STEP_PRECISION);
+    }
+
+    public static final double round(double x, double precision) {
+        return Math.round(x * precision)/precision;
+    }
+
+    public static final double round(double x) {
+        return Math.round(x * DEFAULT_STEP_PRECISION)/DEFAULT_STEP_PRECISION;
+    }
+
+    public static final double [] explode(
+        double from,
+        double to,
+        double step,
+        double precision
+    ) {
+        double lower = from;
+
+        double diff = to - from;
+        double tmp  = diff / step;
+        int    num = (int)Math.abs(Math.ceil(tmp)) + 1;
+
+        double [] values = new double[num];
+
+        if (from > to) {
+            step = -step;
+        }
+
+        for (int idx = 0; idx < num; idx++) {
+            values[idx] = round(lower, precision);
+            lower      += step;
+        }
+
+        return values;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/FLYSUtils.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,227 @@
+package de.intevation.flys.utils;
+
+import org.apache.log4j.Logger;
+ 
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.w3c.dom.Document;
+
+import gnu.trove.TDoubleArrayList;
+
+import de.intevation.artifacts.Artifact;
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.artifacts.common.utils.Config;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+import de.intevation.flys.artifacts.model.RiverFactory;
+import de.intevation.flys.model.River;
+
+public class FLYSUtils {
+
+    /** The logger that is used in this utility. */
+    private static Logger logger = Logger.getLogger(FLYSUtils.class);
+
+    public static enum KM_MODE { RANGE, LOCATIONS, NONE };
+
+    public static final String XPATH_RIVER_PROJECTION =
+        "/artifact-database/floodmap/river[@name=$name]/srid/@value";
+
+    public static final String XPATH_SHAPEFILE_DIR =
+        "/artifact-database/floodmap/shapefile-path/@value";
+
+    public static final String XPATH_VELOCITY_LOGFILE =
+        "/artifact-database/floodmap/velocity/logfile/@path";
+
+    public static final String XPATH_MAPSERVER_URL =
+        "/artifact-database/floodmap/mapserver/server/@path";
+
+    public static final String XPATH_MAPFILE_PATH =
+        "/artifact-database/floodmap/mapserver/mapfile/@path";
+
+    public static final String XPATH_MAPFILE_TEMPLATE =
+        "/artifact-database/floodmap/mapserver/map-template/@path";
+
+    public static final String XPATH_MAPSERVER_TEMPLATE_PATH =
+        "/artifact-database/floodmap/mapserver/templates/@path";
+
+
+    private FLYSUtils() {
+    }
+
+
+    public static FLYSArtifact getArtifact(String uuid, CallContext context) {
+        try {
+            Artifact artifact = context.getDatabase().getRawArtifact(uuid);
+
+            if (artifact == null) {
+                logger.error("Artifact '" + uuid + "' does not exist.");
+                return null;
+            }
+
+            if (!(artifact instanceof FLYSArtifact)) {
+                logger.error("Artifact '" +uuid+ "' is no valid FLYSArtifact.");
+                return null;
+            }
+
+            return (FLYSArtifact) artifact;
+        }
+        // TODO: catch more selective
+        catch (Exception e) {
+            logger.error("Cannot get FLYSArtifact " + uuid + " from database (" + e.getMessage() + ").");
+            return null;
+        }
+    }
+
+
+    /**
+     * Convinience function to retrieve an XPath as string with replaced config
+     * directory.
+     *
+     * @param xpath The XPath expression.
+     *
+     * @return a string with replaced config directory.
+     */
+    public static String getXPathString(String xpath) {
+        String tmp = Config.getStringXPath(xpath);
+        tmp        = Config.replaceConfigDir(tmp);
+
+        return tmp;
+    }
+
+
+    public static KM_MODE getKmRangeMode(FLYSArtifact flys) {
+        String mode = flys.getDataAsString("ld_mode");
+
+        if (mode == null || mode.length() == 0) {
+            return KM_MODE.NONE;
+        }
+        else if (mode.equals("distance"))  {
+            return KM_MODE.RANGE;
+        }
+        else if (mode.equals("locations")) {
+            return KM_MODE.LOCATIONS;
+        }
+        else {
+            return KM_MODE.NONE;
+        }
+    }
+
+
+    public static double[] getKmRange(FLYSArtifact flys) {
+        switch (getKmRangeMode(flys)) {
+            case RANGE: {
+                return getKmFromTo(flys);
+            }
+
+            case LOCATIONS: {
+                double[] locs = getLocations(flys);
+                return new double[] { locs[0], locs[locs.length-1] };
+            }
+
+            case NONE: {
+                double[] locs = getLocations(flys);
+                if (locs != null) {
+                    return new double[] { locs[0], locs[locs.length-1] };
+                }
+                else {
+                    return getKmFromTo(flys);
+                }
+            }
+        }
+
+        return new double[] { Double.NaN, Double.NaN };
+    }
+
+
+    public static double[] getKmFromTo(FLYSArtifact flys) {
+        String strFrom = flys.getDataAsString("ld_from");
+        String strTo   = flys.getDataAsString("ld_to");
+
+        if (strFrom == null || strTo == null) {
+            return null;
+        }
+
+        try {
+            return new double[] {
+                Double.parseDouble(strFrom),
+                Double.parseDouble(strTo) };
+        }
+        catch (NumberFormatException nfe) {
+            return null;
+        }
+    }
+
+
+    public static double[] getLocations(FLYSArtifact flys) {
+        String locationStr = flys.getDataAsString("ld_locations");
+
+        if (locationStr == null || locationStr.length() == 0) {
+            return null;
+        }
+
+        String[] tmp               = locationStr.split(" ");
+        TDoubleArrayList locations = new TDoubleArrayList();
+
+        for (String l: tmp) {
+            try {
+                locations.add(Double.parseDouble(l));
+            }
+            catch (NumberFormatException nfe) {
+            }
+        }
+
+        locations.sort();
+
+        return locations.toNativeArray();
+    }
+
+
+    /**
+     * Returns the selected River object based on the 'river' data that might
+     * have been inserted by the user.
+     *
+     * @return the selected River or null if no river has been chosen yet.
+     */
+    public static River getRiver(FLYSArtifact flys) {
+        String sRiver = flys.getDataAsString("river");
+
+        return (sRiver != null)
+            ? RiverFactory.getRiver(sRiver)
+            : null;
+    }
+
+
+    /**
+     * Extracts the SRID defined in the global configuration for the river
+     * specified in <i>artifact</i>.
+     *
+     * @param artifact The FLYSArtifact that stores the name of the river.
+     *
+     * @return the SRID as string (e.g. "31466").
+     */
+    public static String getRiverSrid(FLYSArtifact artifact) {
+        String river = artifact.getDataAsString("river");
+
+        if (river == null || river.length() == 0) {
+            return null;
+        }
+
+        Map<String, String> variables = new HashMap<String, String>(1);
+        variables.put("name", river);
+
+        Document cfg = Config.getConfig();
+
+        return (String) XMLUtils.xpath(
+            cfg,
+            XPATH_RIVER_PROJECTION,
+            XPathConstants.STRING,
+            null,
+            variables);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/Formatter.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,154 @@
+package de.intevation.flys.utils;
+
+import java.text.NumberFormat;
+import java.util.Locale;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.resources.Resources;
+
+
+public final class Formatter {
+
+    // WATERLEVEL FORMATTER CONSTANTS
+    public static final int WATERLEVEL_KM_MIN_DIGITS = 3;
+    public static final int WATERLEVEL_KM_MAX_DIGITS = 3;
+    public static final int WATERLEVEL_W_MIN_DIGITS  = 0;
+    public static final int WATERLEVEL_W_MAX_DIGITS  = 2;
+    public static final int WATERLEVEL_Q_MIN_DIGITS  = 0;
+    public static final int WATERLEVEL_Q_MAX_DIGITS  = 2;
+
+
+    // COMPUTED DISCHARGE CURVE FORMATTER CONSTANTS
+    public static final int COMPUTED_DISCHARGE_W_MIN_DIGITS  = 2;
+    public static final int COMPUTED_DISCHARGE_W_MAX_DIGITS  = 2;
+    public static final int COMPUTED_DISCHARGE_Q_MIN_DIGITS  = 0;
+    public static final int COMPUTED_DISCHARGE_Q_MAX_DIGITS  = 0;
+
+
+    // DURATION CURVE FORMATTER CONSTANTS
+    public static final int DURATION_W_MIN_DIGITS = 0;
+    public static final int DURATION_W_MAX_DIGITS = 2;
+    public static final int DURATION_Q_MIN_DIGITS = 0;
+    public static final int DURATION_Q_MAX_DIGITS = 1;
+    public static final int DURATION_D_MIN_DIGITS = 0;
+    public static final int DURATION_D_MAX_DIGITS = 0;
+
+
+    public static NumberFormat getFormatter(CallContext c, int min, int max){
+        Locale       locale = Resources.getLocale(c.getMeta());
+        NumberFormat nf     = NumberFormat.getInstance(locale);
+
+        nf.setMaximumFractionDigits(max);
+        nf.setMinimumFractionDigits(min);
+
+        return nf;
+    }
+
+
+    /**
+     * Returns the number formatter for kilometer values in waterlevel exports.
+     *
+     * @return the number formatter for kilometer values.
+     */
+    public static NumberFormat getWaterlevelKM(CallContext context) {
+        return getFormatter(
+            context,
+            WATERLEVEL_KM_MIN_DIGITS,
+            WATERLEVEL_KM_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for W values in waterlevel exports.
+     *
+     * @return the number formatter for W values.
+     */
+    public static NumberFormat getWaterlevelW(CallContext context) {
+        return getFormatter(
+            context,
+            WATERLEVEL_W_MIN_DIGITS,
+            WATERLEVEL_W_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values in waterlevel exports.
+     *
+     * @return the number formatter for Q values.
+     */
+    public static NumberFormat getWaterlevelQ(CallContext context) {
+        return getFormatter(
+            context,
+            WATERLEVEL_Q_MIN_DIGITS,
+            WATERLEVEL_Q_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for W values in exports of computed
+     * discharge curves.
+     *
+     * @return the number formatter for W values.
+     */
+    public static NumberFormat getComputedDischargeW(CallContext context) {
+        return getFormatter(
+            context,
+            COMPUTED_DISCHARGE_W_MIN_DIGITS,
+            COMPUTED_DISCHARGE_W_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values in exports of computed
+     * discharge curves.
+     *
+     * @return the number formatter for Q values.
+     */
+    public static NumberFormat getComputedDischargeQ(CallContext context) {
+        return getFormatter(
+            context,
+            COMPUTED_DISCHARGE_Q_MIN_DIGITS,
+            COMPUTED_DISCHARGE_Q_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for W values in duration curve exports.
+     *
+     * @return the number formatter for W values.
+     */
+    public static NumberFormat getDurationW(CallContext context) {
+        return getFormatter(
+            context,
+            DURATION_W_MIN_DIGITS,
+            DURATION_W_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for Q values in duration curve exports.
+     *
+     * @return the number formatter for W values.
+     */
+    public static NumberFormat getDurationQ(CallContext context) {
+        return getFormatter(
+            context,
+            DURATION_Q_MIN_DIGITS,
+            DURATION_Q_MAX_DIGITS);
+    }
+
+
+    /**
+     * Returns the number formatter for D values in duration curve exports.
+     *
+     * @return the number formatter for W values.
+     */
+    public static NumberFormat getDurationD(CallContext context) {
+        return getFormatter(
+            context,
+            DURATION_D_MIN_DIGITS,
+            DURATION_D_MAX_DIGITS);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,213 @@
+package de.intevation.flys.utils;
+
+import java.io.IOException;
+import java.io.File;
+import java.io.Serializable;
+import java.net.MalformedURLException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import com.vividsolutions.jts.geom.Coordinate;
+import com.vividsolutions.jts.geom.Geometry;
+
+import org.opengis.feature.simple.SimpleFeature;
+import org.opengis.feature.simple.SimpleFeatureType;
+import org.opengis.referencing.FactoryException;
+import org.opengis.referencing.NoSuchAuthorityCodeException;
+import org.opengis.referencing.crs.CoordinateReferenceSystem;
+
+import org.geotools.data.DataStoreFactorySpi;
+import org.geotools.data.FeatureStore;
+import org.geotools.data.DefaultTransaction;
+import org.geotools.data.Transaction;
+import org.geotools.data.shapefile.ShapefileDataStore;
+import org.geotools.data.shapefile.ShapefileDataStoreFactory;
+import org.geotools.feature.FeatureIterator;
+import org.geotools.feature.FeatureCollection;
+import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
+import org.geotools.geojson.feature.FeatureJSON;
+import org.geotools.referencing.CRS;
+
+import de.intevation.flys.model.RiverAxis;
+
+
+public class GeometryUtils {
+
+    private static final Logger logger = Logger.getLogger(GeometryUtils.class);
+
+
+    private GeometryUtils() {
+    }
+
+
+    public static String getRiverBounds(String rivername) {
+        RiverAxis axis = RiverAxis.getRiverAxis(rivername);
+        if (axis != null) {
+            // TODO Take the correct EPSG into account. Maybe, we need to
+            // reproject the geometry.
+            Geometry geom   = axis.getGeom().getBoundary();
+            return jtsBoundsToOLBounds(geom);
+        }
+
+        return null;
+    }
+
+
+    /**
+     * Returns the boundary of Geometry <i>geom</i> in OpenLayers
+     * representation.
+     *
+     * @param geom The geometry.
+     *
+     * @return the OpenLayers boundary of <i>geom</i>.
+     */
+    public static String jtsBoundsToOLBounds(Geometry geom) {
+        Coordinate[] c = geom != null ? geom.getCoordinates() : null;
+
+        if (c == null || c.length < 2) {
+            return null;
+        }
+
+        return "" + c[0].x + " " + c[1].y + " " + c[1].x + " " + c[0].y;
+    }
+
+
+    public static SimpleFeatureType buildFeatureType(
+        String name, String srs, Class geometryType)
+    {
+        return buildFeatureType(name, srs, geometryType, null);
+    }
+
+
+    /**
+     * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder.
+     *
+     * @param name The name of the FeatureType.
+     * @param srs The SRS (e.g. "EPSG:31466").
+     * @param geometryType The geometry type's class (e.g. Polygon.class).
+     * @param attrs Optional. An object with attribute-name/attribute-class
+     * pairs where index 0 specifies the name as string and index 1 the type
+     * as class.
+     *
+     * @return a new SimpleFeatureType.
+     */
+    public static SimpleFeatureType buildFeatureType(
+        String name, String srs, Class geometryType, Object[][] attrs)
+    {
+        try {
+            SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
+            CoordinateReferenceSystem crs    = CRS.decode(srs);
+
+            builder.setName("flys");
+            builder.setNamespaceURI("http://www.intevation.de/");
+            builder.setCRS(crs);
+            builder.setSRS(srs);
+
+            builder.add("geometry", geometryType, crs);
+
+            if (attrs != null) {
+                for (Object[] attr: attrs) {
+                    builder.add((String) attr[0], (Class) attr[1]);
+                }
+            }
+
+            return builder.buildFeatureType();
+        }
+        catch (NoSuchAuthorityCodeException nsae) {
+        }
+        catch (FactoryException fe) {
+        }
+
+        return null;
+    }
+
+
+    public static List<SimpleFeature> parseGeoJSON(
+        String geojson, SimpleFeatureType ft
+    ) {
+        List<SimpleFeature> collection = new ArrayList<SimpleFeature>();
+
+        try {
+            FeatureJSON fjson = new FeatureJSON();
+            fjson.setFeatureType(ft);
+
+            FeatureIterator<SimpleFeature> iterator =
+                fjson.streamFeatureCollection(geojson);
+
+            while (iterator.hasNext()) {
+                collection.add(iterator.next());
+            }
+        }
+        catch (IOException ioe) {
+            // TODO handle exception
+        }
+
+        return collection;
+    }
+
+
+    public static boolean writeShapefile(
+        File              shape,
+        SimpleFeatureType featureType,
+        FeatureCollection collection
+    ) {
+        if (collection.isEmpty()) {
+            logger.warn("Shapefile is not written - no features given!");
+            return false;
+        }
+
+        Transaction transaction = null;
+
+        try {
+            Map<String, Serializable> params =
+                new HashMap<String, Serializable>();
+
+            params.put("url", shape.toURI().toURL());
+            params.put("create spatial index", Boolean.TRUE);
+
+            DataStoreFactorySpi dataStoreFactory =
+                new ShapefileDataStoreFactory();
+
+            ShapefileDataStore newDataStore =
+                (ShapefileDataStore)dataStoreFactory.createNewDataStore(params);
+            newDataStore.createSchema(featureType);
+
+            transaction = new DefaultTransaction("create");
+
+            String typeName = newDataStore.getTypeNames()[0];
+
+            FeatureStore<SimpleFeatureType, SimpleFeature> featureStore =
+                (FeatureStore<SimpleFeatureType, SimpleFeature>)
+                    newDataStore.getFeatureSource(typeName);
+
+            featureStore.setTransaction(transaction);
+
+            featureStore.addFeatures(collection);
+            transaction.commit();
+
+            return true;
+        }
+        catch (MalformedURLException mue) {
+            logger.error("Unable to prepare shapefile: " + mue.getMessage());
+        }
+        catch (IOException ioe) {
+            logger.error("Unable to write shapefile: " + ioe.getMessage());
+        }
+        finally {
+            if (transaction != null) {
+                try {
+                    logger.debug("XXX CLOSE TRANSACTION!");
+                    transaction.close();
+                }
+                catch (IOException ioe) { /* do nothing */ }
+            }
+        }
+
+        return false;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/MapfileGenerator.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,462 @@
+package de.intevation.flys.utils;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.apache.velocity.Template;
+import org.apache.velocity.VelocityContext;
+import org.apache.velocity.app.VelocityEngine;
+
+import de.intevation.flys.artifacts.model.LayerInfo;
+
+/**
+ * This class iterates over a bunch of directories, searches for meta
+ * information coresponding to shapefiles and creates a mapfile which is used by
+ * a <i>MapServer</i>.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class MapfileGenerator
+extends Thread
+{
+    public static final String WSPLGEN_RESULT_SHAPE   = "wsplgen.shp";
+    public static final String WSPLGEN_LINES_SHAPE    = "barrier_lines.shp";
+    public static final String WSPLGEN_POLYGONS_SHAPE = "barrier_polygons.shp";
+
+    public static final String MS_WSPLGEN_POSTFIX  = "-wsplgen";
+    public static final String MS_BARRIERS_POSTFIX = "-barriers";
+    public static final String MS_LINE_POSTFIX     = "-lines";
+    public static final String MS_POLYGONS_POSTFIX = "-polygons";
+
+    protected static final long SLEEPTIME = 10 * 1000L; // 10 seconds
+
+    private static Logger logger = Logger.getLogger(MapfileGenerator.class);
+
+    private static MapfileGenerator instance;
+
+    private File mapfile;
+    private File shapefileDirectory;
+
+    private String mapServerUrl;
+    private String templatePath;
+    private String velocityLogfile;
+
+    private VelocityEngine velocityEngine;
+    private boolean lock[];
+
+
+
+    private MapfileGenerator() {
+        lock = new boolean[1];
+    }
+
+
+    /**
+     * A main method which can be used to create a mapfile without a running
+     * artifact server.<br>
+     * <b>NOTE:</b> This method is not implemented yet!
+     *
+     * @param args Arguments.
+     */
+    public static void main(String[] args) {
+        throw new Error("MapfileGenerator.main() is CURRENTLY NOT IMPLEMENTED!");
+    }
+
+
+    /**
+     * Returns the instance of this generator.
+     *
+     * @return the instance.
+     */
+    public static synchronized MapfileGenerator getInstance() {
+        if (instance == null) {
+            instance = new MapfileGenerator();
+            instance.setDaemon(true);
+            instance.start();
+        }
+
+        return instance;
+    }
+
+
+    /**
+     * Triggers the mapfile generation process.
+     */
+    public void update() {
+        synchronized (lock) {
+            logger.debug("update");
+            lock[0] = true;
+            lock.notify();
+        }
+    }
+
+
+    /**
+     * Thread to generate a mapfile.
+     */
+    @Override
+    public void run() {
+        logger.debug("Start MapfileGenerator thread...");
+        try {
+            for (;;) {
+                synchronized (lock) {
+                    while (!lock[0]) {
+                        lock.wait(SLEEPTIME);
+                    }
+                    lock[0] = false;
+                }
+
+                logger.debug("Start sync process now...");
+                generate();
+            }
+        }
+        catch (InterruptedException ie) {
+            logger.debug("MapfileGenerator thread got an interrupt.");
+        }
+        catch (FileNotFoundException fnfe) {
+            logger.debug("Error while mapfile creation: " + fnfe.getMessage());
+        }
+        finally {
+            logger.debug("THREAD END");
+        }
+    }
+
+    /**
+     * Method to check the existance of a template file.
+     *
+     * @param templateID The name of a template.
+     * @return true, of the template exists - otherwise false.
+     */
+    public boolean templateExists(String templateID){
+        Template template = getTemplateByName(templateID);
+        return template != null;
+    }
+
+
+    /**
+     * Method which starts searching for meta information file and mapfile
+     * generation.
+     */
+    protected void generate()
+    throws    FileNotFoundException
+    {
+        File[]        userDirs = getUserDirs();
+        List<LayerInfo> layers = parseLayers(userDirs);
+
+        logger.info("Found " + layers.size() + " layers for user mapfile.");
+
+        writeMapfile(layers);
+    }
+
+
+    /**
+     * Returns the VelocityEngine used for the template mechanism.
+     *
+     * @return the velocity engine.
+     */
+    protected VelocityEngine getVelocityEngine() {
+        if (velocityEngine == null) {
+            velocityEngine = new VelocityEngine();
+            try {
+                setupVelocity(velocityEngine);
+            }
+            catch (Exception e) {
+                logger.error(e, e);
+                return null;
+            }
+        }
+        return velocityEngine;
+    }
+
+
+    /**
+     * Initialize velocity.
+     *
+     * @param engine Velocity engine.
+     * @throws Exception if an error occured while initializing velocity.
+     */
+    protected void setupVelocity(VelocityEngine engine)
+    throws Exception
+    {
+        engine.setProperty(
+            "input.encoding",
+            "UTF-8");
+
+        engine.setProperty(
+            VelocityEngine.RUNTIME_LOG,
+            FLYSUtils.getXPathString(FLYSUtils.XPATH_VELOCITY_LOGFILE));
+
+        engine.setProperty(
+            "resource.loader",
+            "file");
+
+        engine.setProperty(
+            "file.resource.loader.path",
+            FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPSERVER_TEMPLATE_PATH));
+
+        engine.init();
+    }
+
+
+    /**
+     * Returns a template specified by <i>model</i>.
+     *
+     * @param model The name of the template.
+     * @return a template.
+     */
+    protected Template getTemplateByName(String model) {
+        if (model.indexOf(".vm") < 0) {
+            model = model.concat(".vm");
+        }
+
+        try {
+            VelocityEngine engine = getVelocityEngine();
+            if (engine == null) {
+                logger.error("Error while fetching VelocityEngine.");
+                return null;
+            }
+
+            return engine.getTemplate(model);
+        }
+        catch (Exception e) {
+            logger.warn(e, e);
+        }
+
+        return null;
+    }
+
+
+    /**
+     * Returns the mapfile  template.
+     *
+     * @return the mapfile template.
+     * @throws Exception if an error occured while reading the configuration.
+     */
+    protected Template getMapfileTemplate()
+    throws Exception
+    {
+        String mapfileName = FLYSUtils.getXPathString(
+            FLYSUtils.XPATH_MAPFILE_TEMPLATE);
+
+        return getTemplateByName(mapfileName);
+    }
+
+
+    /**
+     * Returns the base directory storing the shapefiles.
+     *
+     * @return the shapefile base directory.
+     *
+     * @throws FileNotFoundException if no shapefile path is found or
+     * configured.
+     */
+    protected File getShapefileBaseDir()
+    throws    FileNotFoundException
+    {
+        if (shapefileDirectory == null) {
+            String path = FLYSUtils.getXPathString(
+                FLYSUtils.XPATH_SHAPEFILE_DIR);
+
+            if (path != null) {
+                shapefileDirectory = new File(path);
+            }
+
+            if (shapefileDirectory == null || !shapefileDirectory.exists()) {
+                throw new FileNotFoundException("No shapefile directory given");
+            }
+        }
+
+        return shapefileDirectory;
+    }
+
+
+    protected File[] getUserDirs()
+    throws    FileNotFoundException
+    {
+        File   baseDir      = getShapefileBaseDir();
+        File[] artifactDirs = baseDir.listFiles();
+
+        // TODO ONLY RETURN DIRECTORIES OF THE SPECIFIED USER
+
+        return artifactDirs;
+    }
+
+
+
+    protected List<LayerInfo> parseLayers(File[] dirs) {
+        List<LayerInfo> layers = new ArrayList<LayerInfo>();
+
+        for (File dir: dirs) {
+            LayerInfo layer = parseUeskLayer(dir);
+            if (layer != null && layer.getData() != null) {
+                logger.debug("   Add WSPLGEN layer.");
+                layers.add(layer);
+            }
+
+            List<LayerInfo> barriers = parseBarriersLayers(dir);
+            int num = barriers != null ? barriers.size() : 0;
+            if (num > 0) {
+                if (barriers.get(0).getData() != null) {
+                    logger.debug("   Add " + num + " BARRIERS layers.");
+                    layers.addAll(barriers);
+                }
+            }
+        }
+
+        return layers;
+    }
+
+
+    protected LayerInfo parseUeskLayer(File dir) {
+        File uesk = new File(dir, WSPLGEN_RESULT_SHAPE);
+
+        if (!uesk.exists() || !uesk.isFile()) {
+            return null;
+        }
+
+        return new LayerInfo(
+            dir.getName() + MS_WSPLGEN_POSTFIX,
+            "POLYGON",
+            dir.getName(),
+            WSPLGEN_RESULT_SHAPE,
+            "I18N_WSPLGEN_RESULT");
+    }
+
+
+    protected List<LayerInfo> parseBarriersLayers(File dir) {
+        List<LayerInfo> barriers = new ArrayList<LayerInfo>(2);
+
+        String group      = dir.getName() + MS_BARRIERS_POSTFIX;
+        String groupTitle = "I18N_BARRIERS_TITLE";
+
+        File lines    = new File(dir, WSPLGEN_LINES_SHAPE);
+        File polygons = new File(dir, WSPLGEN_POLYGONS_SHAPE);
+
+        if (lines.exists() || lines.isFile()) {
+            barriers.add(
+                new LayerInfo(
+                    dir.getName() + MS_LINE_POSTFIX,
+                    "LINE",
+                    dir.getName(),
+                    WSPLGEN_LINES_SHAPE,
+                    "I18N_LINE_SHAPE",
+                    group,
+                    groupTitle));
+        }
+
+        if (polygons.exists() || polygons.isFile()) {
+            barriers.add(
+                new LayerInfo(
+                    dir.getName() + MS_POLYGONS_POSTFIX,
+                    "POLYGON",
+                    dir.getName(),
+                    WSPLGEN_POLYGONS_SHAPE,
+                    "I18N_POLYGON_SHAPE",
+                    group,
+                    groupTitle));
+        }
+
+        return barriers;
+    }
+
+
+    /**
+     * Creates a mapfile with the layer information stored in <i>layers</i>.
+     *
+     * @param layers Layer information.
+     */
+    protected void writeMapfile(List<LayerInfo> layers) {
+        String tmpMapName = "mapfile" + new Date().getTime();
+
+        File mapfile = new File(
+            FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPFILE_PATH));
+
+        File   tmp     = null;
+        Writer writer  = null;
+
+        try {
+            tmp = new File(mapfile.getParent(), tmpMapName);
+            tmp.createNewFile();
+
+            writer = new FileWriter(tmp);
+
+            VelocityContext context = new VelocityContext();
+            context.put("MAPSERVERURL",
+                FLYSUtils.getXPathString(FLYSUtils.XPATH_MAPSERVER_URL));
+            context.put("SHAPEFILEPATH",
+                FLYSUtils.getXPathString(FLYSUtils.XPATH_SHAPEFILE_DIR));
+            context.put("LAYERS", fillLayerTemplates(layers));
+
+            Template mapTemplate = getMapfileTemplate();
+            if (mapTemplate == null) {
+                logger.warn("No mapfile template found.");
+                return;
+            }
+
+            mapTemplate.merge(context, writer);
+
+            // we need to create a temporary mapfile first und rename it into
+            // real mapfile because we don't run into race conditions on this
+            // way. (iw)
+            tmp.renameTo(mapfile);
+        }
+        catch (FileNotFoundException fnfe) {
+            logger.error(fnfe, fnfe);
+        }
+        catch (IOException ioe) {
+            logger.error(ioe, ioe);
+        }
+        catch (Exception e) {
+            logger.error(e, e);
+        }
+        finally {
+            try {
+                if (writer != null) {
+                    writer.close();
+                }
+
+                if (tmp.exists()) {
+                    tmp.delete();
+                }
+            }
+            catch (IOException ioe) {
+                logger.debug(ioe, ioe);
+            }
+        }
+    }
+
+
+    protected List<String> fillLayerTemplates(List<LayerInfo> layers) {
+        List<String> evaluated = new ArrayList<String>(layers.size());
+
+        for (LayerInfo layer: layers) {
+            StringWriter writer = new StringWriter();
+
+            VelocityContext context = new VelocityContext();
+            context.put("LAYER", layer);
+
+            Template t = getTemplateByName("layer.vm");
+            if (t == null) {
+                logger.warn("No 'layer.vm' template found.");
+                return evaluated;
+            }
+
+            t.merge(context, writer);
+
+            evaluated.add(writer.toString());
+        }
+
+        return evaluated;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/utils/ThemeUtil.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,48 @@
+package de.intevation.flys.utils;
+
+import java.awt.Color;
+
+import org.w3c.dom.Document;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+
+/**
+ * Utility to deal with themes and their representations.
+ */
+public class ThemeUtil {
+    public final static String XPATH_LINE_COLOR = "/theme/field[@name='linecolor']/@default";
+
+    /**
+     * Parse a string like "103, 100, 0" and return a corresping color.
+     * @param rgbtext Color as string representation, e.g. "255,0,20".
+     * @return Color, null in case of issues.
+     */
+    public static Color parseRGB(String rgbtext) {
+        if (rgbtext == null) {
+            return null;
+        }
+        String rgb[] = rgbtext.split(",");
+        Color c = null;
+        try {
+            c = new Color(
+                    Integer.valueOf(rgb[0].trim()),
+                    Integer.valueOf(rgb[1].trim()),
+                    Integer.valueOf(rgb[2].trim()));
+        }
+        catch (NumberFormatException nfe) {
+            c = null;
+        }
+        return c;
+    }
+
+    /**
+     * Gets color from color field.
+     * @param theme    the theme document.
+     * @return color.
+     */
+    public static Color parseLineColorField(Document theme) {
+        String color = XMLUtils.xpathString(theme, XPATH_LINE_COLOR, null);
+        return parseRGB(color);
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/wsplgen/JobExecutor.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,111 @@
+package de.intevation.flys.wsplgen;
+
+import java.io.IOException;
+import java.io.File;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.CallContext;
+
+import de.intevation.flys.artifacts.model.WSPLGENJob;
+
+import de.intevation.flys.utils.MapfileGenerator;
+
+
+public class JobExecutor {
+
+    public static final String WSPLGEN_PARAMETER_FILE =
+        "wsplgen.par";
+
+    public static final String WSPLGEN_BIN_PATH =
+        System.getProperty("wsplgen.bin.path");
+
+
+    private Logger logger = Logger.getLogger(JobExecutor.class);
+
+    private Process process;
+
+    protected WSPLGENJob job;
+
+    protected JobObserver     logObserver;
+    protected ProblemObserver errorObserver;
+
+
+    public JobExecutor(WSPLGENJob job) {
+        this.job           = job;
+        this.logObserver   = new JobObserver(job);
+        this.errorObserver = new ProblemObserver(job);
+    }
+
+
+    public void execute() {
+        File dir       = job.getWorkingDir();
+        File parameter = new File(dir, WSPLGEN_PARAMETER_FILE);
+
+        String[] args = new String[] {
+            WSPLGEN_BIN_PATH,
+            "-PAR=\"" + parameter.getAbsolutePath() + "\""
+        };
+
+        execute(args, dir);
+    }
+
+
+    protected void execute(String[] args, File dir) {
+        logger.info("Start JobExecutor for artifact: " + dir.getName());
+
+        String errorMsg = null;
+
+        try {
+            synchronized (this) {
+                process = Runtime.getRuntime().exec(args, null, dir);
+
+                logObserver.setInputStream(process.getInputStream());
+                errorObserver.setInputStream(process.getErrorStream());
+
+                logObserver.start();
+                errorObserver.start();
+
+                try {
+                    process.waitFor();
+                }
+                catch (InterruptedException ie) {
+                    logger.error("WSPLGEN job interrupted: " + ie.getMessage());
+                }
+
+                try {
+                    logObserver.join();
+                    errorObserver.join();
+                }
+                catch (InterruptedException iee) { /* do nothing */ }
+
+                job.getCallContext().afterBackground(CallContext.STORE);
+
+                logger.info("WSPLGEN exit value: " + process.exitValue());
+                logger.info(
+                    "WSPLGEN throw " +
+                    errorObserver.numErrors() + " errors.");
+                logger.info(
+                    "WSPLGEN throw " +
+                    errorObserver.numWarnings() + " warnings.");
+
+                MapfileGenerator.getInstance().update();
+
+                return;
+            }
+        }
+        catch (SecurityException se) {
+            logger.error(se);
+        }
+        catch (IOException ioe) {
+            logger.error(ioe);
+        }
+        catch (NullPointerException npe) {
+            logger.error(npe, npe);
+        }
+        catch (IndexOutOfBoundsException ioobe) {
+            logger.error(ioobe, ioobe);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/wsplgen/JobObserver.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,106 @@
+package de.intevation.flys.wsplgen;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.CalculationMessage;
+import de.intevation.flys.artifacts.model.WSPLGENJob;
+
+
+public class JobObserver extends Thread {
+
+    private static Logger logger = Logger.getLogger(JobObserver.class);
+
+
+    public static final String WSPLGEN_ENCODING =
+        "ISO-8859-1";
+
+    public static final String WSPLGEN_LOG_OUTPUT =
+        System.getProperty("wsplgen.log.output", "false");
+
+    public static final String[] STEPS = {
+        ".*<-Auswertung der Kommandozeilen-Parameter beendet.*",
+        ".*->Laden des DGM in Datei '.*' gestartet.*",
+        ".*->Triangulierung der Knoten gestartet.*",
+        ".*->Anpassung der Elemente an Dämme und Gräben gestartet.*",
+        ".*<-WSPLGEN Version .* beendet.*"
+    };
+
+
+    protected WSPLGENJob job;
+
+    protected InputStream in;
+
+    protected Pattern[] patterns;
+
+    protected int len;
+
+    protected boolean copy;
+
+
+    public JobObserver(WSPLGENJob job) {
+        this.job  = job;
+        this.len  = 0;
+        this.copy = Boolean.parseBoolean(WSPLGEN_LOG_OUTPUT);
+
+        patterns = new Pattern[STEPS.length];
+    }
+
+
+    protected void prepareRegexes() {
+        for (int num = STEPS.length, i = 0; i < num; i++) {
+            patterns[i] = Pattern.compile(STEPS[i], Pattern.DOTALL);
+        }
+    }
+
+
+    public void setInputStream(InputStream in) {
+        this.in = in;
+    }
+
+
+    public void run() {
+        logger.debug("Start observation...");
+        prepareRegexes();
+
+        try {
+            BufferedReader reader =
+                new BufferedReader(
+                    new InputStreamReader(in, WSPLGEN_ENCODING));
+
+            String line = null;
+
+            while ((line = reader.readLine()) != null) {
+                if (copy) {
+                    logger.debug(line);
+                }
+
+                update(line);
+            }
+        }
+        catch (IOException ioe) {
+            logger.warn("Observation canceled: " + ioe.getMessage());
+        }
+    }
+
+
+    protected void update(String log) {
+        for (int num = patterns.length, i = 0; i < num; i++) {
+            Matcher m = patterns[i].matcher(log);
+
+            if (m.matches()) {
+                job.getCallContext().addBackgroundMessage(
+                    new CalculationMessage(num, i+1, log));
+
+                logger.info("Finished step " + (i+1) + " / " + num);
+            }
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=5 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/wsplgen/ProblemObserver.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,104 @@
+package de.intevation.flys.wsplgen;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.WSPLGENCalculation;
+import de.intevation.flys.artifacts.model.WSPLGENJob;
+
+
+public class ProblemObserver extends JobObserver {
+
+    private static Logger logger = Logger.getLogger(ProblemObserver.class);
+
+
+    public static final Pattern WSPLGEN_ERROR_START = Pattern.compile(
+        ".*->Fehler\\s*\\((\\d+)\\).*",
+        Pattern.DOTALL);
+
+    public static final Pattern WSPLGEN_ERROR_END = Pattern.compile(
+        ".*<-Fehler .*",
+        Pattern.DOTALL);
+
+    public static final Pattern WSPLGEN_WARNING_START = Pattern.compile(
+        ".*->Warnung\\s*\\((\\d+)\\).*",
+        Pattern.DOTALL);
+
+    public static final Pattern WSPLGEN_WARNING_END = Pattern.compile(
+        ".*<-Warnung .*",
+        Pattern.DOTALL);
+
+
+    protected int error;
+    protected int warning;
+
+    protected WSPLGENCalculation calculation;
+
+
+    public ProblemObserver(WSPLGENJob job) {
+        super(job);
+        error       = -1;
+        warning     = -1;
+        calculation = job.getCalculation();
+    }
+
+
+    public void run() {
+        logger.debug("Start observation...");
+
+        super.run();
+    }
+
+
+    @Override
+    protected void prepareRegexes() {
+        // do nothing
+    }
+
+
+    @Override
+    protected void update(String log) {
+        Matcher startError = WSPLGEN_ERROR_START.matcher(log);
+        if (startError.matches()) {
+            error = Integer.parseInt(startError.group(1));
+            return;
+        }
+
+        Matcher endError = WSPLGEN_ERROR_END.matcher(log);
+        if (endError.matches()) {
+            error = -1;
+        }
+
+        if (error > 0) {
+            calculation.addError(new Integer(error), log);
+        }
+
+        Matcher startWarning = WSPLGEN_WARNING_START.matcher(log);
+        if (startWarning.matches()) {
+            warning = Integer.parseInt(startWarning.group(1));
+            return;
+        }
+
+        Matcher endWarning = WSPLGEN_WARNING_END.matcher(log);
+        if (endWarning.matches()) {
+            warning = -1;
+        }
+
+        if (warning > 0) {
+            calculation.addWarning(new Integer(warning), log);
+        }
+    }
+
+
+    public int numErrors() {
+        return calculation.numErrors();
+    }
+
+
+    public int numWarnings() {
+        return calculation.numWarnings();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=5 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/wsplgen/Scheduler.java	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,109 @@
+package de.intevation.flys.wsplgen;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.flys.artifacts.model.WSPLGENJob;
+
+
+public class Scheduler implements Runnable {
+
+    public static final int MAX_WSPLGEN_PROCESSES = 1;
+
+
+    protected List<WSPLGENJob> jobs;
+
+
+    private static Scheduler INSTANCE;
+
+    private static final Logger logger = Logger.getLogger(Scheduler.class);
+
+
+
+    private Scheduler() {
+        jobs = Collections.synchronizedList(new LinkedList<WSPLGENJob>());
+    }
+
+
+    public static Scheduler getInstance() {
+        if (INSTANCE == null) {
+            logger.info("Create new WSPLGEN Scheduler...");
+
+            INSTANCE = new Scheduler();
+            new Thread(INSTANCE).start();
+        }
+
+        return INSTANCE;
+    }
+
+
+    public void addJob(WSPLGENJob job) {
+        synchronized(jobs) {
+            jobs.add(job);
+
+            logger.info("New WSPLGEN job added.");
+
+            jobs.notifyAll();
+        }
+    }
+
+
+    public WSPLGENJob getJob() {
+        synchronized(jobs) {
+            if (!jobs.isEmpty()) {
+                return jobs.remove(0);
+            }
+
+            return null;
+        }
+    }
+
+
+    public void run() {
+        logger.info("WSPLGEN Scheduler started.");
+
+        for (;;) {
+            try {
+                doRun();
+            }
+            catch (InterruptedException ie) {
+                logger.warn("Interrupt in WSPLGEN Scheduler -> restart it!");
+            }
+        }
+    }
+
+
+    public void doRun()
+    throws InterruptedException
+    {
+        for (;;) {
+            final WSPLGENJob job = getJob();
+
+            if (job != null) {
+                logger.debug("Got new job to execute...");
+
+                Thread t = new Thread() {
+                    public void run() {
+                        JobExecutor executor = new JobExecutor(job);
+                        executor.execute();
+                    }
+                };
+
+                t.start();
+                t.join();
+            }
+            else {
+                logger.info("No more jobs in Scheduler -> go sleep!");
+                synchronized (jobs) {
+                    jobs.wait();
+                }
+
+                logger.info("New jobs in Scheduler -> wake up!");
+            }
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/datacage-sql/org-h2-driver.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,29 @@
+delete.all.users = DELETE FROM users
+delete.all.artifacts = DELETE FROM artifacts
+user.id.nextval = SELECT NEXTVAL('USERS_ID_SEQ')
+user.by.gid = SELECT id FROM users WHERE gid = ?
+insert.user = INSERT INTO users (id, gid) VALUES (?, ?)
+collection.by.gid = SELECT id FROM collections WHERE gid = ?
+collection.id.nextval = SELECT NEXTVAL('COLLECTIONS_ID_SEQ')
+insert.collection = INSERT INTO collections (id, gid, user_id, name, creation) VALUES (?, ?, ?, ?, ?)
+artifact.by.gid = SELECT id FROM artifacts WHERE gid = ?
+collection.item.id.nextval = SELECT NEXTVAL('COLLECTION_ITEMS_ID_SEQ')
+insert.collection.item = INSERT INTO collection_items (id, collection_id, artifact_id) VALUES (?, ?, ?)
+artifact.id.nextval = SELECT NEXTVAL('ARTIFACTS_ID_SEQ')
+insert.artifact = INSERT INTO artifacts (id, gid, state, creation) VALUES (?, ?, ?, ?)
+artifact.data.id.nextval = SELECT NEXTVAL('ARTIFACT_DATA_ID_SEQ')
+insert.artifact.data = INSERT INTO artifact_data (id, artifact_id, kind, k, v) VALUES (?, ?, ?, ?, ?)
+out.id.nextval = SELECT NEXTVAL('OUTS_ID_SEQ')
+insert.out = INSERT INTO outs (id, artifact_id, name, description, out_type) VALUES (?, ?, ?, ?, ?)
+facet.id.nextval = SELECT NEXTVAL('FACETS_ID_SEQ')
+insert.facet = INSERT INTO facets (id, out_id, name, num, state, description) VALUES (?, ?, ?, ?, ?, ?)
+
+update.collection.name = UPDATE collections SET name = ? WHERE gid = ?
+delete.artifact.from.collection = DELETE FROM collection_items WHERE collection_id = ? AND artifact_id = ?
+delete.collection.by.gid = DELETE FROM collections WHERE gid = ?
+delete.user.by.gid = DELETE FROM user WHERE gid = ?
+delete.artifact.data.by.artifact.id = DELETE FROM artifact_data WHERE artifact_id = ?
+delete.outs.by.artifact.id = DELETE FROM outs WHERE artifact_id = ?
+delete.facets.by.artifact.id = DELETE FROM facets WHERE out_id IN (SELECT id FROM outs WHERE artifact_id = ?)
+
+delete.artifact.by.gid = DELETE FROM artifacts WHERE gid = ?
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/datacage-sql/org-postgresql-driver.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,29 @@
+delete.all.users = DELETE FROM users
+delete.all.artifacts = DELETE FROM artifacts
+user.id.nextval = SELECT NEXTVAL('USERS_ID_SEQ')
+user.by.gid = SELECT id FROM users WHERE gid = ?::uuid
+insert.user = INSERT INTO users (id, gid) VALUES (?, ?::uuid)
+collection.by.gid = SELECT id FROM collections WHERE gid = ?::uuid
+collection.id.nextval = SELECT NEXTVAL('COLLECTIONS_ID_SEQ')
+insert.collection = INSERT INTO collections (id, gid, user_id, name, creation) VALUES (?, ?::uuid, ?, ?, ?)
+artifact.by.gid = SELECT id FROM artifacts WHERE gid = ?::uuid
+collection.item.id.nextval = SELECT NEXTVAL('COLLECTION_ITEMS_ID_SEQ')
+insert.collection.item = INSERT INTO collection_items (id, collection_id, artifact_id) VALUES (?, ?, ?)
+artifact.id.nextval = SELECT NEXTVAL('ARTIFACTS_ID_SEQ')
+insert.artifact = INSERT INTO artifacts (id, gid, state, creation) VALUES (?, ?::uuid, ?, ?)
+artifact.data.id.nextval = SELECT NEXTVAL('ARTIFACT_DATA_ID_SEQ')
+insert.artifact.data = INSERT INTO artifact_data (id, artifact_id, kind, k, v) VALUES (?, ?, ?, ?, ?)
+out.id.nextval = SELECT NEXTVAL('OUTS_ID_SEQ')
+insert.out = INSERT INTO outs (id, artifact_id, name, description, out_type) VALUES (?, ?, ?, ?, ?)
+facet.id.nextval = SELECT NEXTVAL('FACETS_ID_SEQ')
+insert.facet = INSERT INTO facets (id, out_id, name, num, state, description) VALUES (?, ?, ?, ?, ?, ?)
+
+update.collection.name = UPDATE collections SET name = ? WHERE gid = ?::uuid
+delete.artifact.from.collection = DELETE FROM collection_items WHERE collection_id = ? AND artifact_id = ?
+delete.collection.by.gid = DELETE FROM collections WHERE gid = ?::uuid
+delete.user.by.gid = DELETE FROM user WHERE gid = ?::uuid
+delete.artifact.data.by.artifact.id = DELETE FROM artifact_data WHERE artifact_id = ?
+delete.outs.by.artifact.id = DELETE FROM outs WHERE artifact_id = ?
+delete.facets.by.artifact.id = DELETE FROM facets WHERE out_id IN (SELECT id FROM outs WHERE artifact_id = ?)
+
+delete.artifact.by.gid = DELETE FROM artifacts WHERE gid = ?::uuid
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/messages.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,83 @@
+state.winfo.river = River
+state.winfo.calculation_mode = Calculation Mode
+state.winfo.location_distance = Location or distance selection
+state.winfo.wq = Input for W/Q data
+state.winfo.wq_adapted = Input for W/Q data
+state.winfo.location = Choose the location
+state.winfo.distance = Choose the range
+state.winfo.uesk.wsp = Choose the waterlevel
+state.winfo.uesk.dgm = Digital Terrain Model
+state.winfo.uesk.profiles = Interpolated Profiles
+state.winfo.uesk.floodplain = Lateral Boundary
+state.winfo.uesk.differences = Differenzen between waterlevel and terrain
+state.winfo.uesk.scenario = Flood Plain / Scenario
+
+calc.surface.curve = Water Level/Surface Curve
+calc.flood.map = Flood Plain
+calc.discharge.curve = State Discharge Curve/Stage Discharge Relation
+calc.duration.curve = Duration Curve
+calc.discharge.longitudinal.section = TODO (W bei...)
+calc.w.differences = Differenzen
+
+cross_section = Cross Section
+
+scenario.current = Current
+scenario.potentiel = Potentiel
+scenario.scenario = Scenario
+floodplain.option = Use Floodplain?
+
+river = River
+calculation_mode = Calculation Mode
+ld_locations = Location(s)
+
+chart.longitudinal.section.title = W-Longitudinal Section
+chart.longitudinal.section.subtitle = Range: {0}-km {1,number,#.###} - {2,number,#.###}
+chart.longitudinal.section.xaxis.label = km
+chart.longitudinal.section.yaxis.label = W [NN + m]
+chart.longitudinal.section.yaxis.second.label = Q [m\u00b3/s]
+chart.longitudinal.annotations.label = {0}.km
+
+chart.cross_section.title = Cross Section for river {0}
+chart.cross_section.subtitle = {0}-km: {1,number,#.###}
+chart.cross_section.xaxis.label = Distance [m]
+chart.cross_section.yaxis.label = W [NN + m]
+
+chart.discharge.curve.title = Discharge Curve
+chart.discharge.curve.xaxis.label = Q [m\u00b3/s]
+chart.discharge.curve.yaxis.label = W [cm]
+chart.discharge.curve.curve.valid.from = {0} (valid from {1,date,short})
+chart.discharge.curve.curve.valid.range = {0} (valid from {1,date,short} - {2,date,short})
+chart.computed.discharge.curve.title = Discharge Curve
+chart.computed.discharge.curve.subtitle = {0}-km: {1,number,#.###}
+chart.computed.discharge.curve.yaxis.label = W [NN + m]
+chart.computed.discharge.curve.curve.label = Discharge Curve {0} km {1}
+chart.duration.curve.title = Duration Curve
+chart.duration.curve.subtitle = {0}-km: {1,number,#.###}
+chart.duration.curve.xaxis.label = Duration of Non-Exceedence [Days]
+chart.duration.curve.yaxis.label = W [NN + m]
+chart.duration.curve.curve.w = Waterlevel duration curve for {0}
+chart.duration.curve.curve.q = Discharge duration curve for {0}
+facet.longitudinal_section.annotations = POIs
+facet.discharge_curves.mainvalues.q = Q (main values)
+facet.discharge_curves.mainvalues.w = W (main values)
+
+export.waterlevel.csv.header.km = River-Km
+export.waterlevel.csv.header.w = W [NN + m]
+export.waterlevel.csv.header.q = Q [m\u00b3/s]
+export.computed.discharge.curve.csv.header.w = W [NN + m]
+export.computed.discharge.curve.csv.header.q = Q [m\u00b3/s]
+export.duration.curve.csv.header.duration = D [Days]
+export.duration.curve.csv.header.w = W [NN + m]
+export.duration.curve.csv.header.q = Q [m\u00b3/s]
+export.discharge.longitudinal.section.csv.header.km = River-Km
+export.discharge.longitudinal.section.csv.header.w = W [NN + m]
+export.discharge.longitudinal.section.csv.header.cw = W corr.
+export.discharge.longitudinal.section.csv.header.q = Q [m\u00b3/s]
+
+floodmap.wmsbackground = Background Map
+floodmap.riveraxis = River Axis
+
+wsplgen.job.queued = WSPLGEN job in queue.
+wsplgen.job.error = An unexpected error while starting WSPLGEN occured.
+
+wsp.selected.string = {0}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/messages_de.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,84 @@
+state.winfo.river = Gew\u00e4sser
+state.winfo.calculation_mode = Berechnungsart
+state.winfo.location_distance = Wahl des Berechnungsortes/strecke
+state.winfo.wq = Eingabe f\u00fcr W/Q Daten
+state.winfo.wq_adapted = Eingabe f\u00fcr W/Q Daten
+state.winfo.location = Wahl des Berechnungsortes
+state.winfo.distance = Wahl der Berechnungsstrecke
+state.winfo.uesk.wsp = Wahl der Wasserspiegellage
+state.winfo.uesk.dgm = Digitales Gel\u00e4ndemodell
+state.winfo.uesk.profiles = Interpolierte Profile
+state.winfo.uesk.floodplain = Laterale Begrenzung
+state.winfo.uesk.differences = Differenzen zwischen Wasserspiegellage und Gel\u00e4nde
+state.winfo.uesk.scenario = \u00dcberschwemmungsfl\u00e4che / Szenario
+
+calc.surface.curve = Wasserstand/Wasserspiegellage
+calc.flood.map = \u00dcberschwemmungsfl\u00e4che
+calc.discharge.curve = Abflusskurve/abflusstafel
+calc.duration.curve = Dauerlinie
+calc.discharge.longitudinal.section = W bei ungleichwertigem Abflussl\u00e4ngsschnitt
+calc.w.differences = Differenzen
+
+cross_section = Querprofil
+
+scenario.current = Aktuell
+scenario.potentiel = Potentiell
+scenario.scenario = Szenario
+
+floodplain.option = Talaue verwenden?
+
+river = Fluss
+calculation_mode = Berechnungsart
+ld_locations = Ort(e)
+
+chart.cross_section.title = Querprofildiagram für Gew\u00e4sser {0}
+chart.cross_section.subtitle = {0}-km: {1,number,#.###}
+chart.cross_section.xaxis.label = Abstand [m]
+chart.cross_section.yaxis.label = W [NN + m]
+
+chart.longitudinal.section.title = W-L\u00e4ngsschnitt
+chart.longitudinal.section.subtitle = Bereich: {0}-km {1,number,#.###} - {2,number,#.###}
+chart.longitudinal.section.xaxis.label = km
+chart.longitudinal.section.yaxis.label = W [NN + m]
+chart.longitudinal.section.yaxis.second.label = Q [m\u00b3/s]
+chart.longitudinal.annotations.label = {0}.km
+chart.discharge.curve.title = Abflusskurve
+chart.discharge.curve.xaxis.label = Q [m\u00b3/s]
+chart.discharge.curve.yaxis.label = W [cm]
+chart.discharge.curve.curve.valid.from = {0} (g\u00fcltig ab {1,date,medium})
+chart.discharge.curve.curve.valid.range = {0} (g\u00fcltig ab {1,date,medium} - {2,date,medium})
+chart.computed.discharge.curve.title = Abflusskurve
+chart.computed.discharge.curve.subtitle = {0}-km: {1,number,#.###}
+chart.computed.discharge.curve.yaxis.label = W [NN + m]
+chart.computed.discharge.curve.curve.label = Abflusskurve {0} km {1}
+chart.duration.curve.title = Dauerlinie
+chart.duration.curve.subtitle = {0}-km: {1,number,#.###}
+chart.duration.curve.xaxis.label = Unterschreitungsdauer [Tage]
+chart.duration.curve.yaxis.label = W [NN + m]
+chart.duration.curve.curve.w = Wasserstandsdauerline f\u00fcr {0}
+chart.duration.curve.curve.q = Abflussdauerline f\u00fcr {0}
+
+facet.longitudinal_section.annotations = Streckenfavoriten
+facet.discharge_curves.mainvalues.q = Q (Haupt- und Extremwerte)
+facet.discharge_curves.mainvalues.w = W (Haupt- und Extremwerte)
+
+export.waterlevel.csv.header.km = Fluss-Km
+export.waterlevel.csv.header.w = W [NN + m]
+export.waterlevel.csv.header.q = Q [m\u00b3/s]
+export.computed.discharge.curve.csv.header.w = W [NN + m]
+export.computed.discharge.curve.csv.header.q = Q [m\u00b3/s]
+export.duration.curve.csv.header.duration = D [Tagen]
+export.duration.curve.csv.header.w = W [NN + m]
+export.duration.curve.csv.header.q = Q [m\u00b3/s]
+export.discharge.longitudinal.section.csv.header.km = Fluss-Km
+export.discharge.longitudinal.section.csv.header.w = W [NN + m]
+export.discharge.longitudinal.section.csv.header.cw = W korr.
+export.discharge.longitudinal.section.csv.header.q = Q [m\u00b3/s]
+
+floodmap.wmsbackground = Hintergrundkarte
+floodmap.riveraxis = Flussachse
+
+wsplgen.job.queued = WSPLGEN Berechnung befindet sich in Warteschlange.
+wsplgen.job.error = Ein unerwarteter Fehler beim Starten von WSPLGEN ist aufgetreten.
+
+wsp.selected.string = {0}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/messages_de_DE.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,83 @@
+state.winfo.river = Gew\u00e4sser
+state.winfo.calculation_mode = Berechnungsart
+state.winfo.location_distance = Wahl des Berechnungsortes/strecke
+state.winfo.wq = Eingabe f\u00fcr W/Q Daten
+state.winfo.wq_adapted = Eingabe f\u00fcr W/Q Daten
+state.winfo.location = Wahl des Berechnungsortes
+state.winfo.distance = Wahl der Berechnungsstrecke
+state.winfo.uesk.wsp = Wahl der Wasserspiegellage
+state.winfo.uesk.dgm = Digitales Gel\u00e4ndemodell
+state.winfo.uesk.profiles = Interpolierte Profile
+state.winfo.uesk.floodplain = Laterale Begrenzung
+state.winfo.uesk.differences = Differenzen zwischen Wasserspiegellage und Gel\u00e4nde
+state.winfo.uesk.scenario = \u00dcberschwemmungsfl\u00e4che / Szenario
+
+calc.surface.curve = Wasserstand/Wasserspiegellage
+calc.flood.map = \u00dcberschwemmungsfl\u00e4che
+calc.discharge.curve = Abflusskurve/Abflusstafel
+calc.duration.curve = Dauerlinie
+calc.discharge.longitudinal.section = W bei ungleichwertigem Abflussl\u00e4ngsschnitt
+calc.w.differences = Differenzen
+
+cross_section = Querprofil
+
+scenario.current = Aktuell
+scenario.potentiel = Potentiell
+scenario.scenario = Szenario
+
+floodplain.option = Talaue verwenden?
+
+river = Fluss
+calculation_mode = Berechnungsart
+ld_locations = Ort(e)
+
+chart.cross_section.title = Querprofildiagramm für Gew\u00e4sser {0}
+chart.cross_section.subtitle = {0}-km: {1,number,#.###}
+chart.cross_section.xaxis.label = Abstand [m]
+chart.cross_section.yaxis.label = W [NN + m]
+
+chart.longitudinal.section.title = W-L\u00e4ngsschnitt
+chart.longitudinal.section.subtitle = Bereich: {0}-km {1,number,#.###} - {2,number,#.###}
+chart.longitudinal.section.xaxis.label = km
+chart.longitudinal.section.yaxis.label = W [NN + m]
+chart.longitudinal.section.yaxis.second.label = Q [m\u00b3/s]
+chart.longitudinal.annotations.label = {0}.km
+chart.discharge.curve.title = Abflusskurve
+chart.discharge.curve.xaxis.label = Q [m\u00b3/s]
+chart.discharge.curve.yaxis.label = W [cm]
+chart.discharge.curve.curve.valid.from = {0} (g\u00fcltig ab {1,date,medium})
+chart.discharge.curve.curve.valid.range = {0} (g\u00fcltig ab {1,date,medium} - {2,date,medium})
+chart.computed.discharge.curve.title = Abflusskurve
+chart.computed.discharge.curve.subtitle = {0}-km: {1,number,#.###}
+chart.computed.discharge.curve.yaxis.label = W [NN + m]
+chart.computed.discharge.curve.curve.label = Abflusskurve {0} km {1}
+chart.duration.curve.title = Dauerlinie
+chart.duration.curve.subtitle = {0}-km: {1,number,#.###}
+chart.duration.curve.xaxis.label = Unterschreitungsdauer [Tage]
+chart.duration.curve.yaxis.label = W [NN + m]
+chart.duration.curve.curve.w = Wasserstandsdauerline f\u00fcr {0}
+chart.duration.curve.curve.q = Abflussdauerline f\u00fcr {0}
+facet.longitudinal_section.annotations = Streckenfavoriten
+facet.discharge_curves.mainvalues.q = Q (Haupt- und Extremwerte)
+facet.discharge_curves.mainvalues.w = W (Haupt- und Extremwerte)
+
+export.waterlevel.csv.header.km = Fluss-Km
+export.waterlevel.csv.header.w = W [NN + m]
+export.waterlevel.csv.header.q = Q [m\u00b3/s]
+export.computed.discharge.curve.csv.header.w = W [NN + m]
+export.computed.discharge.curve.csv.header.q = Q [m\u00b3/s]
+export.duration.curve.csv.header.duration = D [Tagen]
+export.duration.curve.csv.header.w = W [NN + m]
+export.duration.curve.csv.header.q = Q [m\u00b3/s]
+export.discharge.longitudinal.section.csv.header.km = Fluss-Km
+export.discharge.longitudinal.section.csv.header.w = W [NN + m]
+export.discharge.longitudinal.section.csv.header.cw = W korr.
+export.discharge.longitudinal.section.csv.header.q = Q [m\u00b3/s]
+
+floodmap.wmsbackground = Hintergrundkarte
+floodmap.riveraxis = Flussachse
+
+wsplgen.job.queued = WSPLGEN Berechnung befindet sich in Warteschlange.
+wsplgen.job.error = Ein unerwarteter Fehler beim Starten von WSPLGEN ist aufgetreten.
+
+wsp.selected.string = {0}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/resources/messages_en.properties	Fri Sep 28 12:14:17 2012 +0200
@@ -0,0 +1,81 @@
+state.winfo.river = River
+state.winfo.calculation_mode = Calculation Mode
+state.winfo.location_distance = Location or distance selection
+state.winfo.wq = Input for W/Q data
+state.winfo.wq_adapted = Input for W/Q data
+state.winfo.location = Choose the location
+state.winfo.distance = Choose the range
+state.winfo.uesk.wsp = Choose the waterlevel
+state.winfo.uesk.dgm = Digital Terrain Model
+state.winfo.uesk.profiles = Interpolated Profiles
+state.winfo.uesk.floodplain = Lateral Boundary
+state.winfo.uesk.differences = Differences between waterlevel and terrain
+state.winfo.uesk.scenario = Flood Plain / Scenario
+
+calc.surface.curve = Water Level/Surface Curve
+calc.flood.map = Flood Plain
+calc.discharge.curve = State Discharge Curve/Stage Discharge Relation
+calc.duration.curve = Duration Curve
+calc.discharge.longitudinal.section = TODO (W bei...)
+calc.w.differences = Differences
+
+cross_section = Cross Section
+
+scenario.current = Current
+scenario.potentiel = Potentiel
+scenario.scenario = Scenario
+
+floodplain.option = Use Floodplain?
+
+river = River
+calculation_mode = Calculation Mode
+ld_locations = Location(s)
+
+chart.cross_section.title = Cross Section for river {0}
+chart.cross_section.subtitle = {0}-km: {1,number,#.###}
+chart.cross_section.xaxis.label = Distance [m]
+chart.cross_section.yaxis.label = W [NN + m]
+
+chart.longitudinal.section.title = W-Longitudinal Section
+chart.longitudinal.section.subtitle = Range: {0}-km {1,number,#.###} - {2,number,#.###}
+chart.longitudinal.section.xaxis.label = km
+chart.longitudinal.section.yaxis.label = W [NN + m]
+chart.longitudinal.section.yaxis.second.label = Q [m\u00b3/s]
+chart.longitudinal.annotations.label = {0}.km
+chart.discharge.curve.title = Discharge Curve
+chart.discharge.curve.xaxis.label = Q [m\u00b3/s]
+chart.discharge.curve.yaxis.label = W [cm]
+chart.discharge.curve.curve.valid.from = {0} (valid from {1,date,short})
+chart.discharge.curve.curve.valid.range = {0} (valid from {1,date,short} - {2,date,short})
+chart.computed.discharge.curve.title = Discharge Curve
+chart.computed.discharge.curve.subtitle = {0}-km: {1,number,#.###}
+chart.computed.discharge.curve.yaxis.label = W [NN + m]
+chart.computed.discharge.curve.curve.label = Discharge Curve {0} km {1}
+chart.duration.curve.title = Duration Curve
+chart.duration.curve.subtitle = {0}-km: {1,number,#.###}
+chart.duration.curve.xaxis.label = Duration of Non-Exceedence [Days]
+chart.duration.curve.yaxis.label = W [NN + m]
+chart.duration.curve.curve.w = Waterlevel duration curve for {0}
+chart.duration.curve.curve.q = Discharge duration curve for {0}
+facet.longitudinal_section.annotations = POIs
+
+export.waterlevel.csv.header.km = River-Km
+export.waterlevel.csv.header.w = W [NN + m]
+export.waterlevel.csv.header.q = Q [m\u00b3/s]
+export.computed.discharge.curve.csv.header.w = W [NN + m]
+export.computed.discharge.curve.csv.header.q = Q [m\u00b3/s]
+export.duration.curve.csv.header.duration = D [Days]
+export.duration.curve.csv.header.w = W [NN + m]
+export.duration.curve.csv.header.q = Q [m\u00b3/s]
+export.discharge.longitudinal.section.csv.header.km = River-Km
+export.discharge.longitudinal.section.csv.header.w = W [NN + m]
+export.discharge.longitudinal.section.csv.header.cw = W corr.
+export.discharge.longitudinal.section.csv.header.q = Q [m\u00b3/s]
+
+floodmap.wmsbackground = Background Map
+floodmap.riveraxis = River Axis
+
+wsplgen.job.queued = WSPLGEN job in queue.
+wsplgen.job.error = An unexpected error while starting WSPLGEN occured.
+
+wsp.selected.string = {0}

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