view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFacet.java @ 4655:cd44d28d0fbc

Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +0100
parents e1fd2dfdcb80
children
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package de.intevation.flys.artifacts.model;

import de.intevation.artifactdatabase.state.Facet;
import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.CallContext;
import de.intevation.artifacts.DataProvider;
import de.intevation.flys.artifacts.HYKArtifact;
import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
import de.intevation.flys.model.FastCrossSectionLine;

import java.util.List;

import org.apache.log4j.Logger;


/**
 * Trival Facet for HYKs
 */
public class HYKFacet
extends      DataFacet
implements   FacetTypes {

    /** House logger. */
    private static Logger logger = Logger.getLogger(HYKFacet.class);

    /** Trivial constructor, set (maybe localized) description. */
    public HYKFacet(int idx, String description) {
        super(idx, HYK, description, ComputeType.FEED, null, null);
    }


    /**
     * Set km from cross section- master to HYKArtifact, then fire up
     * computation.
     *
     * @param art artifact to get data from.
     * @param context ignored
     */
     @Override
    public Object getData(Artifact art, CallContext context) {
        logger.debug("HYKFacet.getData");

        String dataKey = CrossSectionFacet.BLACKBOARD_CS_MASTER_DATA;

        List<DataProvider> providers = context.getDataProvider(dataKey);
        if (providers.size() < 1) {
            logger.warn("Could not find Cross-Section data provider to get master cs km.");
            return null;
        }

        FastCrossSectionLine crossSection = (FastCrossSectionLine) providers.get(0)
            .provideData(dataKey, null, context);

        if(crossSection == null) {
            logger.debug("getData: crossSection is null");
            return null;
        }

        double km = crossSection.getKm();
        logger.debug("HYKFacet.getData: Master Cross Section is at km: " + km);

        // Set this km at hyk artifact to be evaluated.
        HYKArtifact hyk = (HYKArtifact) art;
        hyk.setKm(km);

        return hyk.compute(context, hash, stateId, type, false);
    }


    /** Do a deep copy. */
    @Override
    public Facet deepCopy() {
        HYKFacet copy = new HYKFacet(this.index, this.description);
        copy.set(this);
        return copy;
    }
}
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