view flys-artifacts/src/main/java/de/intevation/flys/artifacts/ManualPointsArtifact.java @ 4241:49cb65d5932d

Improved the historical discharge calculation. The calculation now creates new HistoricalWQKms (new subclass of WQKms). Those WQKms are used to create new facets from (new) type 'HistoricalDischargeCurveFacet'. The chart generator is improved to support those facets.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 24 Oct 2012 14:34:35 +0200
parents 066e2b4d69ca
children 6153c50f78cf
line wrap: on
line source
package de.intevation.flys.artifacts;

import java.awt.geom.Point2D;
import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.json.JSONArray;
import org.json.JSONException;
import org.w3c.dom.Document;

import de.intevation.artifactdatabase.state.Facet;
import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.ArtifactFactory;
import de.intevation.artifacts.CallMeta;
import de.intevation.flys.artifacts.geom.Lines;
import de.intevation.flys.artifacts.model.FacetTypes;
import de.intevation.flys.artifacts.states.DefaultState;
import de.intevation.flys.model.FastCrossSectionLine;


/**
 * Artifact to store user-added points and water lines.
 */
public class ManualPointsArtifact
extends      StaticFLYSArtifact
implements   FacetTypes, WaterLineArtifact
{
    private static final long serialVersionUID = 7096025125474986011L;

    /** The logger for this class. */
    private static Logger logger = Logger.getLogger(ManualPointsArtifact.class);

    /** The name of the artifact. */
    public static final String ARTIFACT_NAME = "manualpoints";


    public ManualPointsArtifact() {
        logger.debug("ManualPointsArtifact.ManualPointsArtifact()");
    }


    /**
     * Gets called from factory to set things up.
     */
    @Override
    public void setup(
            String          identifier,
            ArtifactFactory factory,
            Object          context,
            CallMeta        callMeta,
            Document        data)
    {
        logger.debug("ManualPointsArtifact.setup");
        super.setup(identifier, factory, context, callMeta, data);
        initialize(null, context, callMeta);
    }


    /** Return the name of this artifact. */
    @Override
    public String getName() {
        return ARTIFACT_NAME;
    }


    /** Access state data storing the jsonstring with points. */
    public String getPointsData(String facetName) {
        return getDataAsString(facetName + ".data");
    }


    /**
     * Access state data storing the jsonstring with lines.
     * @param facetName Name of facet or null if the so far
     *                  only known case should be picked.
     * @return (String) value of data element (expect json).
     */
    public String getLinesData(String facetName) {
        if (facetName == null)
            return getDataAsString("cross_section.manualpoints.lines");
        // TODO .lineS?
        return getDataAsString(facetName + ".line");
    }


    /** Setup state and facet. */
    @Override
    protected void initialize(Artifact artifact, Object context, CallMeta meta) {
        logger.debug("ManualPointsArtifact.initialize");
        List<Facet> fs = new ArrayList<Facet>();

        DefaultState state = (DefaultState) getCurrentState(context);
        state.computeInit(this, hash(), context, meta, fs);
        if (!fs.isEmpty()) {
            logger.debug("Facets to add in ManualPointsArtifact.initialize .");
            facets.put(getCurrentStateId(), fs);
        }
        else {
            logger.debug("No facets to add in ManualPointsArtifact.initialize ("
                    + state.getID() + ").");
        }
    }


    /**
     * Get value of line at index.
     * @param index index in json array defining lines.
     * @return water height of line at given index.
     */
    protected double getLine(int index) {
        try {
            JSONArray lines = new JSONArray(getLinesData(null));
            JSONArray array = lines.getJSONArray(index);

            return array.getDouble(0);
        }
        catch(JSONException e){
            logger.error("Could not decode json for line.");
            return 0d;
        }
    }


    /**
     * Get the water line "surface".
     * @param index index of facets data.
     * @param csl 'ground' against which to determine water surface.
     * @param a (ignored in this implementation).
     * @param b (ignored in this implementation).
     */
    @Override
    public Lines.LineData getWaterLines(
            int                  index,
            FastCrossSectionLine csl,
            double a, double b
            ) {
        List<Point2D> points = csl.getPoints();
        return Lines.createWaterLines(points, getLine(index));
    }
}
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