felix@1964: package de.intevation.flys.artifacts;
felix@1964: 
felix@1964: import java.util.ArrayList;
felix@1964: import java.util.List;
felix@1964: 
felix@1964: import org.apache.log4j.Logger;
felix@1964: 
felix@1964: import org.w3c.dom.Document;
felix@1964: 
felix@1964: import de.intevation.artifacts.Artifact;
felix@1964: import de.intevation.artifacts.ArtifactFactory;
felix@1964: import de.intevation.artifacts.CallMeta;
felix@1964: 
felix@1964: import de.intevation.flys.artifacts.model.CrossSectionFacet;
felix@1964: 
felix@1967: import de.intevation.flys.model.CrossSection;
felix@1967: import de.intevation.flys.model.CrossSectionLine;
felix@1967: import de.intevation.flys.artifacts.model.CrossSectionFactory;
felix@1964: import de.intevation.artifacts.common.ArtifactNamespaceContext;
felix@1964: import de.intevation.artifacts.common.utils.XMLUtils;
felix@1964: 
felix@1964: import de.intevation.flys.artifacts.states.StaticState;
felix@1964: 
felix@1964: import de.intevation.artifactdatabase.state.Facet;
felix@1964: import de.intevation.artifactdatabase.state.State;
felix@1964: 
felix@1964: 
felix@1964: 
felix@1964: public class CrossSectionArtifact extends StaticFLYSArtifact {
felix@1964: 
felix@1964:     /** Access ids of doc. */
felix@1964:     public static final String XPATH_IDS = "/art:action/art:ids/@value";
felix@1964: 
felix@1964:     /** Name of Artifact. */
felix@1964:     public static final String CS_ARTIFACT_NAME = "cross_section";
felix@1964: 
felix@1964:     /** Name of state. */
felix@1964:     public static final String STATIC_STATE_NAME = "state.cross_section";
felix@1964: 
felix@1967:     /** Name of data item keeping the position. */
felix@1967:     public static final String DATA_KM = "cross_section.km";
felix@1967: 
felix@1967:     /** Name of data item keeping the database id of this c.s.. */
felix@1967:     public static final String DATA_DBID = "cross_section.dbid";
felix@1967: 
felix@1967:     /** Name of data item keeping the database id of this c.s.. */
felix@1967:     public static final String DATA_IS_MASTER = "cross_section.master?";
felix@1967: 
felix@1964:     /** Own logger. */
felix@1964:     private static final Logger logger =
felix@1964:         Logger.getLogger(CrossSectionArtifact.class);
felix@1964: 
felix@1964: 
felix@1964:     /** Return given name. */
felix@1964:     @Override
felix@1964:     public String getName() {
felix@1964:         return CS_ARTIFACT_NAME;
felix@1964:     }
felix@1964: 
felix@1964: 
felix@1964:     /** Store ids, create a (broken) CrossSectionFacet. */
felix@1964:     @Override
felix@1964:     public void setup(
felix@1964:         String          identifier,
felix@1964:         ArtifactFactory factory,
felix@1964:         Object          context,
felix@1964:         CallMeta        callMeta,
felix@1964:         Document        data)
felix@1964:     {
felix@1964:         logger.info("CrossSectionArtifact.setup");
felix@1964: 
felix@1964:         super.setup(identifier, factory, context, callMeta, data);
felix@1964: 
felix@1964:         String ids = XMLUtils.xpathString(
felix@1964:             data, XPATH_IDS, ArtifactNamespaceContext.INSTANCE);
felix@1964: 
felix@1964:         if (ids != null && ids.length() > 0) {
felix@1967:             addStringData(DATA_DBID, ids);
felix@1967:             logger.debug("CrossSectionArtifacts db-id: " + ids);
felix@1964:         }
felix@1964:         else {
felix@1964:             throw new IllegalArgumentException("No attribute 'ids' found!");
felix@1964:         }
felix@1964: 
felix@1967:         // Assume we start at km 0.
felix@1967:         addStringData(DATA_KM, "0");
felix@1967:         addStringData(DATA_IS_MASTER, "0");
felix@1967: 
felix@1964:         List<Facet> fs = new ArrayList<Facet>();
felix@1971:         CrossSection cs = CrossSectionFactory.getCrossSection(Integer.valueOf(ids));
felix@1971:         fs.add(new CrossSectionFacet(0, cs.getDescription()));
felix@1964: 
felix@1964:         StaticState state = (StaticState) getCurrentState(context);
felix@1964: 
felix@1964:         if (!fs.isEmpty()) {
felix@1964:             facets.put(getCurrentStateId(), fs);
felix@1964:         }
felix@1964:     }
felix@1964: 
felix@1964: 
felix@1964:     /** Do not copy data from daddyfact. */
felix@1964:     @Override
felix@1964:     protected void initialize(
felix@1964:         Artifact artifact,
felix@1964:         Object   context,
felix@1964:         CallMeta callMeta)
felix@1964:     {
felix@1964:         // do nothing
felix@1964:     }
felix@1964: 
felix@1964: 
felix@1964:     /**
felix@1964:      * Create and return a new StaticState with charting output.
felix@1964:      */
felix@1964:     @Override
felix@1964:     public State getCurrentState(Object cc) {
felix@1971:         final List<Facet> fs = facets.get(getCurrentStateId());
felix@1964: 
felix@1971:         StaticState state = new StaticState(STATIC_STATE_NAME) {
felix@1982:             @Override
felix@1971:             public Object staticCompute(List<Facet> facets) {
felix@1971:                 if (facets != null) {
felix@1971:                     facets.addAll(fs);
felix@1971:                 }
felix@1971:                 return null;
felix@1971:             }
felix@1971:         };
felix@1964: 
felix@1967:         state.addDefaultChartOutput("cross_section", fs);
felix@1964: 
felix@1964:         return state;
felix@1964:     }
felix@1964: 
felix@1964: 
felix@1964:     /**
felix@1964:      * Get a list containing the one and only State.
felix@1964:      * @param  context ignored.
felix@1964:      * @return list with one and only state.
felix@1964:      */
felix@1964:     @Override
felix@1964:     protected List<State> getStates(Object context) {
felix@1964:         ArrayList<State> states = new ArrayList<State>();
felix@1964:         states.add(getCurrentState(context));
felix@1964: 
felix@1964:         return states;
felix@1964:     }
felix@1967: 
felix@1967:     // TODO all data access needs proper caching.
felix@1967: 
felix@1967:     /**
felix@1967:      * Get a DataItem casted to int (0 if fails).
felix@1967:      */
felix@1967:     public int getDataAsIntNull(String dataName) {
felix@1967:         String val = getDataAsString(dataName);
felix@1967:         try {
felix@1967:             return Integer.valueOf(val);
felix@1967:         }
felix@1967:         catch (NumberFormatException e) {
felix@1967:             logger.warn("Could not get data " + dataName + " as int", e);
felix@1967:             return 0;
felix@1967:         }
felix@1967:     }
felix@1967: 
felix@1967: 
felix@1967:     /** Returns database-id of cross-section (from data). */
felix@1967:     protected int getDBID() {
felix@1967:         return getDataAsIntNull(DATA_DBID);
felix@1967:     }
felix@1967: 
felix@1967: 
felix@1967:     /**
felix@1967:      * Return position (km) from data, 0 if not found.
felix@1967:      */
felix@1967:     protected double getKm() {
felix@1967:         String val = getDataAsString(DATA_KM);
felix@1967:         try {
felix@1967:             return Double.valueOf(val);
felix@1967:         }
felix@1967:         catch (NumberFormatException e) {
felix@1967:             logger.warn("Could not get data " + DATA_KM + " as double", e);
felix@1967:             return 0;
felix@1967:         }
felix@1967:     }
felix@1967: 
felix@1967: 
felix@1967:     /** Returns true if artifact is set to be a "master" (other facets will
felix@1967:      * refer to this). */
felix@1967:     public boolean isMaster() {
felix@1967:         return !getDataAsString(DATA_IS_MASTER).equals("0");
felix@1967:     }
felix@1967: 
felix@1967: 
felix@1967:     /**
felix@1967:      * Get points of Profile of cross section at given kilometer.
felix@1967:      *
felix@1967:      * @return an array holding coordinates of points of profile (
felix@1967:      *         in the form {{x1, x2} {y1, y2}} ).
felix@1967:      */
felix@1967:     public double [][] getCrossSectionData() {
felix@1967:         logger.info("getCrossSectionData() for cross_section.km "
felix@1967:             + getDataAsString(DATA_KM));
felix@1967:         CrossSectionLine line = searchCrossSectionLine();
felix@1967: 
felix@1967:         return line != null
felix@1967:                ? line.fetchCrossSectionProfile()
felix@1967:                : null;
felix@1967:     }
felix@1967: 
felix@1967: 
felix@1967:     /**
felix@1967:      * Get CrossSectionLine spatially closest to what is specified in the data
felix@1967:      * "cross_section.km".
felix@1967:      *
felix@1967:      * @return CrossSectionLine closest to "cross_section.km".
felix@1967:      */
felix@1967:     public CrossSectionLine searchCrossSectionLine() {
felix@1967:         double wishKM = getKm();
felix@1967: 
felix@1967:         CrossSection crossSection = CrossSectionFactory.getCrossSection(getDBID());
felix@1967:         logger.debug("dbid " + getDBID() + " : " + crossSection);
felix@1967:         List<CrossSectionLine> crossSectionLines =
felix@1967:             crossSection.getLines();
felix@1967:             
felix@1967:         // Get the cross section closest to requested km.
felix@1967:         // Naive, linear approach.
felix@1967:         CrossSectionLine oldLine = crossSectionLines.get(0);
felix@1967:         double oldDiff = Math.abs(wishKM - oldLine.getKm().doubleValue());
felix@1967:         for (CrossSectionLine line: crossSectionLines) {
felix@1967:             double diff = Math.abs(wishKM - line.getKm().doubleValue());
felix@1967:             if (diff > oldDiff) {
felix@1967:                 break;
felix@1967:             }
felix@1967:             oldDiff = diff;
felix@1967:             oldLine = line;
felix@1967:         }
felix@1967:         return oldLine;
felix@1967:     }
felix@1964: }
felix@1964: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :