# HG changeset patch
# User Raimund Renkert <rrenkert@intevation.de>
# Date 1412251377 -7200
# Node ID cac60032aa7dc2e7f8e027fa4270c5d601027eb8
# Parent  676687c3d8f074f9fa8618a762cd25ed66f06e68# Parent  6e9c01a6e90ebfcccf0e51edaeb962819e62448f
merged.

diff -r 676687c3d8f0 -r cac60032aa7d artifacts/doc/conf/generators/discharge-diagrams.xml
--- a/artifacts/doc/conf/generators/discharge-diagrams.xml	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/doc/conf/generators/discharge-diagrams.xml	Thu Oct 02 14:02:57 2014 +0200
@@ -62,7 +62,7 @@
 
   <output-generator names="sq_relation_a,sq_relation_a_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_a.title" default=""/>
     &sqrelation-defaults;
@@ -70,7 +70,7 @@
 
   <output-generator names="sq_relation_b,sq_relation_b_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_b.title" default=""/>
     &sqrelation-defaults;
@@ -78,7 +78,7 @@
 
   <output-generator names="sq_relation_c,sq_relation_c_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_c.title" default=""/>
     &sqrelation-defaults;
@@ -86,7 +86,7 @@
 
   <output-generator names="sq_relation_d,sq_relation_d_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_d.title" default=""/>
     &sqrelation-defaults;
@@ -94,7 +94,7 @@
 
   <output-generator names="sq_relation_e,sq_relation_e_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_e.title" default=""/>
     &sqrelation-defaults;
@@ -102,21 +102,21 @@
 
   <output-generator names="sq_relation_f,sq_relation_f_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_f.title" default=""/>
     &sqrelation-defaults;
   </output-generator>
   <output-generator names="sq_relation_g,sq_relation_g_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_f.title" default=""/>
     &sqrelation-defaults;
   </output-generator>
   <output-generator names="sq_overview,sq_overview_chartinfo"
       class="org.dive4elements.river.exports.DischargeGenerator"
-      injectors="org.dive4elements.river.exports.injector.PNPInjector"
+      injectors="org.dive4elements.river.exports.injector.KmFromLocationInjector,org.dive4elements.river.exports.injector.PNPInjector"
       converter="org.dive4elements.river.exports.DiagramAttributes">
     <title key="chart.sq_relation_f.title" default=""/>
     &sqrelation-defaults;
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/artifacts/D4EArtifact.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/D4EArtifact.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/D4EArtifact.java	Thu Oct 02 14:02:57 2014 +0200
@@ -1235,7 +1235,6 @@
      */
     public List<Output> getOutputs(Object context) {
         if (log.isDebugEnabled()) {
-            log.debug("##### Get Outputs for: " + identifier() + " #####");
             dumpArtifact();
         }
 
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/artifacts/states/minfo/SedimentLoadSQTiSelect.java
--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/states/minfo/SedimentLoadSQTiSelect.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/minfo/SedimentLoadSQTiSelect.java	Thu Oct 02 14:02:57 2014 +0200
@@ -8,18 +8,12 @@
 
 package org.dive4elements.river.artifacts.states.minfo;
 
-import org.apache.log4j.Logger;
-
 import org.dive4elements.river.artifacts.states.DefaultState;
 
 
 public class SedimentLoadSQTiSelect
 extends DefaultState
 {
-    /** The logger used in this class. */
-    private static Logger logger = Logger.getLogger(SedimentLoadSQTiSelect.class);
-
-
     /**
      * The default constructor that initializes an empty State object.
      */
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNameInjector.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNameInjector.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNameInjector.java	Thu Oct 02 14:02:57 2014 +0200
@@ -25,6 +25,10 @@
 
     @Override
     public void injectContext(CallContext ctx, Artifact artifact, Document doc) {
+        if (ctx.getContextValue(CURRENT_KM) instanceof Number) {
+            return;
+        }
+
         D4EArtifact d4e = (D4EArtifact)artifact;
         RangeAccess access = new RangeAccess(d4e);
         String name = d4e.getDataAsString("gauge_name");
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNumberInjector.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNumberInjector.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromGaugeNumberInjector.java	Thu Oct 02 14:02:57 2014 +0200
@@ -29,6 +29,10 @@
         Artifact artifact,
         Document request
     ) {
+        if (ctx.getContextValue(CURRENT_KM) instanceof Number) {
+            return;
+        }
+
         HistoricalDischargeAccess access =
             new HistoricalDischargeAccess((D4EArtifact)artifact);
         Long gaugeNumber = access.getOfficialGaugeNumber();
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromLocationInjector.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromLocationInjector.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromLocationInjector.java	Thu Oct 02 14:02:57 2014 +0200
@@ -27,6 +27,10 @@
         Artifact artifact,
         Document doc
     ) {
+        if (ctx.getContextValue(CURRENT_KM) instanceof Number) {
+            return;
+        }
+
         RangeAccess access = new RangeAccess((D4EArtifact)artifact);
         if (access.getLocations() != null &&
             access.getLocations().length > 0) {
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/injector/KmFromRequestInjector.java	Thu Oct 02 14:02:57 2014 +0200
@@ -19,7 +19,6 @@
 {
     private static final Logger log = Logger.getLogger(KmFromRequestInjector.class);
 
-    public static final Double INVALID_KM = Double.valueOf(-1d);
     public static final String XPATH_CHART_CURRENTKM =
         "/art:action/art:attributes/art:currentKm/@art:km";
     @Override
@@ -31,7 +30,12 @@
     public void injectContext(
         CallContext ctx,
         Artifact artifact,
-        Document request) {
+        Document request
+    ) {
+        if (ctx.getContextValue(CURRENT_KM) instanceof Number) {
+            return;
+        }
+
         Double km = getCurrentKmFromRequest(request);
         if (Double.isNaN(km)) {
             RangeAccess access = new RangeAccess((D4EArtifact)artifact);
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/process/FixWQProcessor.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/process/FixWQProcessor.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/FixWQProcessor.java	Thu Oct 02 14:02:57 2014 +0200
@@ -22,7 +22,6 @@
 import org.dive4elements.river.artifacts.resources.Resources;
 import org.dive4elements.river.exports.DiagramGenerator;
 import org.dive4elements.river.exports.StyledSeriesBuilder;
-import org.dive4elements.river.exports.fixings.FixChartGenerator;
 import org.dive4elements.river.exports.fixings.FixWQCurveGenerator;
 import org.dive4elements.river.java2d.ShapeUtils;
 import org.dive4elements.river.jfree.CollisionFreeXYTextAnnotation;
@@ -39,13 +38,14 @@
 import org.jfree.ui.RectangleInsets;
 import org.jfree.ui.TextAnchor;
 
+import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM;
 
 public class FixWQProcessor
 extends DefaultProcessor
 implements FacetTypes
 {
 
-    private static Logger logger = Logger.getLogger(FixWQProcessor.class);
+    private static Logger log = Logger.getLogger(FixWQProcessor.class);
 
     private String I18N_AXIS_LABEL = "chart.discharge.curve.yaxis.label";
 
@@ -62,10 +62,10 @@
         ThemeDocument theme,
         boolean visible
     ) {
-        // TODO: Simplyfy this processor and move general facets/data to 
+        // TODO: Simplify this processor and move general facets/data to
         // MiscDischargeProcessor or something...
         String facetType = bundle.getFacetName();
-        logger.debug("facet: " + facetType + " name: " + bundle.getFacetDescription());
+        log.debug("facet: " + facetType + " name: " + bundle.getFacetDescription());
         if(facetType.startsWith(FIX_SECTOR_AVERAGE_WQ)) {
             doSectorAverageOut(generator, bundle, theme, visible);
         }
@@ -106,7 +106,7 @@
         ThemeDocument theme,
         boolean visible
     ) {
-        logger.debug("doSectorAverageOut");
+        log.debug("doSectorAverageOut");
         QWDDateRange qwdd = (QWDDateRange)bundle.getData(generator.getCallContext());
         QWD qwd = qwdd != null ? qwdd.getQWD() : null;
 
@@ -118,7 +118,6 @@
             DateFormat dateFormat = DateFormat.getDateInstance(
                 DateFormat.SHORT);
 
-            //TODO: W in cm at Gauge!!!
             series.add(qwd.getQ(), qwd.getW(), false);
 
             XYTextAnnotation anno = new CollisionFreeXYTextAnnotation(
@@ -137,7 +136,7 @@
             }
         }
         else {
-            logger.debug("doSectorAverageOut: qwd == null");
+            log.debug("doSectorAverageOut: qwd == null");
         }
     }
 
@@ -149,21 +148,14 @@
         ThemeDocument    theme,
         boolean          visible
     ) {
-        logger.debug("doAnalysisEventsOut");
+        log.debug("doAnalysisEventsOut");
 
         QWD qwd = (QWD)bundle.getData(generator.getCallContext());
 
         if (qwd == null) {
-            logger.debug("doAnalysisEventsOut: qwd == null");
+            log.debug("doAnalysisEventsOut: qwd == null");
             return;
         }
-// TODO: W in cm at Gauge!!!
-        //double gaugeDatum = getCurrentGaugeDatum();
-        //boolean atGauge = gaugeDatum != 0d;
-
-        //double factor = atGauge ? 100d : 1d;
-
-        //double w = factor*(qwd.getW()-gaugeDatum);
 
         // Force empty symbol.
         if (qwd.getInterpolated()) {
@@ -206,11 +198,11 @@
         ArtifactAndFacet bundle,
         ThemeDocument theme,
         boolean visible) {
-        logger.debug("doReferenceEventsOut");
+        log.debug("doReferenceEventsOut");
 
         QWI qwd = (QWI)bundle.getData(generator.getCallContext());
         if (qwd == null) {
-            logger.debug("doReferenceEventsOut: qwds == null in " + bundle.getFacetDescription());
+            log.debug("doReferenceEventsOut: qwds == null in " + bundle.getFacetDescription());
             return;
         }
 
@@ -227,13 +219,6 @@
                 ? ShapeUtils.INTERPOLATED_SHAPE
                 : ShapeUtils.MEASURED_SHAPE);
 
-// TODO: W in cm at gauge!!!
-        //double gaugeDatum = getCurrentGaugeDatum();
-        //boolean atGauge = gaugeDatum != 0d;
-
-        //double factor = atGauge ? 100d : 1d;
-        //double w = factor*(qwd.getW()-gaugeDatum);
-
         series.add(qwd.getQ(), qwd.getW(), false);
 
         if (visible && theme.parseShowPointLabel()) {
@@ -261,14 +246,14 @@
         ThemeDocument theme,
         boolean visible
     ) {
-        logger.debug("doWQCurveOut");
+        log.debug("doWQCurveOut");
 
         FixWQCurveFacet facet = (FixWQCurveFacet)bundle.getFacet();
         FixFunction func = (FixFunction)facet.getData(
                 bundle.getArtifact(), generator.getCallContext());
 
         if (func == null) {
-            logger.warn("doWQCurveOut: Facet does not contain FixFunction");
+            log.warn("doWQCurveOut: Facet does not contain FixFunction");
             return;
         }
 
@@ -282,32 +267,9 @@
                     500,   // number of samples
                     0.0 ,  // start
                     maxQ); // end
-
-            //TODO: W in cm at gauge!!!
-//            double gaugeDatum = getCurrentGaugeDatum();
-
-//            if (gaugeDatum == 0d) {
-                generator.addAxisSeries(series, axisName, visible);
-//            }
-/*            else {
-                StyledXYSeries series2 = JFreeUtil.sampleFunction2D(
-                        func.getFunction(),
-                        doc,
-                        aaf.getFacetDescription(),
-                        500,   // number of samples
-                        0.0 ,  // start
-                        maxQ); // end
-                addAxisSeries(series2, YAXIS.W.idx, false);
-                // Use second axis at cm if at gauge.
-                for (int i = 0, N = series.getItemCount(); i < N; i++) {
-                    series.updateByIndex(
-                        i, new Double(100d*(series.getY(i).doubleValue()-gaugeDatum)));
-                }
-                addAxisSeries(series, YAXIS.WCm.idx, visible);
-            }*/
         }
         else {
-            logger.warn("doWQCurveOut: maxQ <= 0");
+            log.warn("doWQCurveOut: maxQ <= 0");
         }
     }
 
@@ -317,7 +279,7 @@
         ThemeDocument theme,
         boolean visible
     ) {
-        logger.debug("doOutlierOut");
+        log.debug("doOutlierOut");
 
         QWI[] qws = (QWI[])bundle.getData(generator.getCallContext());
         if(qws != null) {
@@ -329,7 +291,7 @@
                 DateFormat.SHORT);
 
             List<XYTextAnnotation> annos = new ArrayList<XYTextAnnotation>();
-            //TODO: W in cm at Gauge!!!
+
             for (QWI qw: qws) {
                 series.add(qw.getQ(), qw.getW(), false);
 
@@ -349,7 +311,7 @@
             }
         }
         else {
-            logger.debug("doOutlierOut: qwd == null");
+            log.debug("doOutlierOut: qwd == null");
         }
     }
 
@@ -360,20 +322,20 @@
         ThemeDocument theme,
         boolean visible
     ) {
-        logger.debug("doQSectorOut");
+        log.debug("doQSectorOut");
         if (!visible) {
             return;
         }
 
         Object qsectorsObj = bundle.getData(generator.getCallContext());
         if (qsectorsObj == null || !(qsectorsObj instanceof List)) {
-            logger.warn("No QSectors coming from data.");
+            log.warn("No QSectors coming from data.");
             return;
         }
 
         List<?> qsectorsList = (List<?>) qsectorsObj;
         if (qsectorsList.size() == 0 || !(qsectorsList.get(0) instanceof NamedDouble)) {
-            logger.warn("No QSectors coming from data.");
+            log.warn("No QSectors coming from data.");
             return;
         }
 
@@ -433,7 +395,7 @@
         Object data = bundle.getData(generator.getCallContext());
         List<StickyAxisAnnotation> xy = new ArrayList<StickyAxisAnnotation>();
         if (data instanceof double[][]) {
-            logger.debug("Got double[][]");
+            log.debug("Got double[][]");
             double [][] values = (double [][]) data;
             for (int i = 0; i< values[0].length; i++) {
                 xy.add(new StickyAxisAnnotation(bundle.getFacetDescription(),
@@ -448,7 +410,7 @@
         }
         else {
             // Assume its WKms.
-            logger.debug("Got WKms");
+            log.debug("Got WKms");
             /* TODO
             WKms wkms = (WKms) data;
 
@@ -476,24 +438,21 @@
         ThemeDocument    theme,
         boolean          visible
     ) {
-        logger.debug("FixWQCurveGenerator: doWQOut");
         Object data = bundle.getData(generator.getCallContext());
         if (data instanceof WQKms) {
             WQKms wqkms = (WQKms)data;
             // TODO As in doEventsOut, the value-searching should
-            // be delivered by the facet already (instead of in the Generator).
-            logger.debug("FixWQCurveGenerator: doWQOut: WQKms");
+            // be delivered by the facet already
             XYSeries series = new StyledXYSeries(bundle.getFacetDescription(), theme);
-            // TODO: Remove dependency to FixChartGenerator. 
-            Double ckm = (Double) generator.getCallContext().getContextValue(FixChartGenerator.CURRENT_KM);
+            Double ckm = (Double) generator.getCallContext()
+                .getContextValue(CURRENT_KM);
+
             if (wqkms == null || wqkms.getKms().length == 0 || ckm == null) {
-                logger.info("addPointFromWQKms: No event data to show.");
+                log.info("addPointFromWQKms: No event data to show.");
                 return;
             }
+
             double[] kms = wqkms.getKms();
-            // TODO W in cm at gauge!!!
-            //double gaugeDatum = getCurrentGaugeDatum();
-            //double factor = (gaugeDatum == 0d) ? 1d : 100d;
             for (int i = 0 ; i< kms.length; i++) {
                 // TODO: Remove dependency to FixWQCurveGenerator.
                 if (Math.abs(kms[i] - ckm) <= FixWQCurveGenerator.EPSILON) {
@@ -515,7 +474,7 @@
             }
         }
         else {
-            logger.debug("FixWQCurveGenerator: doWQOut: double[][]");
+            log.debug("FixWQCurveGenerator: doWQOut: double[][]");
             double [][] values = (double [][]) data;
 
             XYSeries series = new StyledXYSeries(bundle.getFacetDescription(), false, true, theme);
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSM3AProcessor.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSM3AProcessor.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSM3AProcessor.java	Thu Oct 02 14:02:57 2014 +0200
@@ -7,15 +7,10 @@
  */
 package org.dive4elements.river.exports.process;
 
-import org.apache.log4j.Logger;
-
 import org.dive4elements.river.exports.DiagramGenerator;
 
 public class SedimentLoadLSM3AProcessor extends SedimentLoadLSProcessor {
 
-    private final static Logger logger =
-            Logger.getLogger(SedimentLoadM3AProcessor.class);
-
     public static final String I18N_YAXIS_LABEL =
         "chart.sedimentload.ls.yaxis.label.m3pera";
     public static final String I18N_YAXIS_LABEL_DEFAULT = "[m\u00b3/a]";
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSTAProcessor.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSTAProcessor.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadLSTAProcessor.java	Thu Oct 02 14:02:57 2014 +0200
@@ -8,15 +8,10 @@
 
 package org.dive4elements.river.exports.process;
 
-import org.apache.log4j.Logger;
-
 import org.dive4elements.river.exports.DiagramGenerator;
 
 public class SedimentLoadLSTAProcessor extends SedimentLoadLSProcessor{
 
-    private final static Logger logger =
-            Logger.getLogger(SedimentLoadTAProcessor.class);
-
     public static final String I18N_YAXIS_LABEL =
         "chart.sedimentload.ls.yaxis.label.tpera";
     public static final String I18N_YAXIS_LABEL_DEFAULT = "[t/a]";
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadM3AProcessor.java
--- a/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadM3AProcessor.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/SedimentLoadM3AProcessor.java	Thu Oct 02 14:02:57 2014 +0200
@@ -7,15 +7,10 @@
  */
 package org.dive4elements.river.exports.process;
 
-import org.apache.log4j.Logger;
-
 import org.dive4elements.river.exports.DiagramGenerator;
 
 public class SedimentLoadM3AProcessor extends SedimentLoadProcessor {
 
-    private final static Logger log =
-            Logger.getLogger(SedimentLoadM3AProcessor.class);
-
     public static final String I18N_YAXIS_LABEL =
         "chart.sedimentload.ls.yaxis.label.m3pera";
     public static final String I18N_YAXIS_LABEL_DEFAULT = "[m\u00b3/a]";
diff -r 676687c3d8f0 -r cac60032aa7d artifacts/src/main/java/org/dive4elements/river/jfree/AnnotationHelper.java
--- a/artifacts/src/main/java/org/dive4elements/river/jfree/AnnotationHelper.java	Thu Oct 02 14:01:13 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/jfree/AnnotationHelper.java	Thu Oct 02 14:02:57 2014 +0200
@@ -187,7 +187,7 @@
 
         int axisIndex = annotation.getAxisSymbol();
         XYItemRenderer renderer = null;
-        if (dataset.getDatasets().length > 0) {
+        if (dataset != null && dataset.getDatasets().length > 0) {
             renderer = plot.getRendererForDataset(dataset.getDatasets()[0]);
         }
         else {