/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3) 
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details. 
 */

package org.dive4elements.river.artifacts.model;

import org.apache.log4j.Logger;

import org.dive4elements.artifacts.Artifact;
import org.dive4elements.artifacts.CallContext;

import org.dive4elements.river.artifacts.D4EArtifact;
import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;


/**
 * Difference of historical discharge curve to ...
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class HistoricalDischargeDifferenceFacet
extends      HistoricalDischargeFacet
{
    private static final Logger logger =
        Logger.getLogger(HistoricalDischargeDifferenceFacet.class);


    public HistoricalDischargeDifferenceFacet(
        int    index,
        String name,
        String desc
    ) {
        super(index, name, desc, ComputeType.ADVANCE, null, null);
    }


    public HistoricalDischargeDifferenceFacet(
        int         index,
        String      name,
        String      description,
        ComputeType type,
        String      stateID,
        String      hash

    ) {
        super(index, name, description, type, hash, stateID);
    }


    @Override
    public Object getData(Artifact artifact, CallContext context) {
        if (logger.isDebugEnabled()) {
            logger.debug("Get data for historical discharge difference curves" +
                " at index: " + index + " / stateId: " + stateId);
        }

        D4EArtifact flys = (D4EArtifact) artifact;

        CalculationResult res = (CalculationResult)
            flys.compute(context, hash, stateId, type,  false);

        HistoricalDischargeData data = (HistoricalDischargeData) res.getData();
        WQTimerange[] wqts = (WQTimerange[]) data.getWQTimeranges();

        return wqts[index];
    }
}
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