view flys-artifacts/src/main/java/de/intevation/flys/artifacts/CollectionMonitor.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 58bdf95df5e4
children 06c10ad39280
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package de.intevation.flys.artifacts;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.xml.xpath.XPathConstants;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import de.intevation.artifacts.Artifact;
import de.intevation.artifacts.ArtifactNamespaceContext;
import de.intevation.artifacts.CallContext;
import de.intevation.artifacts.Hook;

import de.intevation.artifacts.common.utils.XMLUtils;
import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;

import de.intevation.artifactdatabase.state.Output;

import de.intevation.flys.artifacts.datacage.Recommendations;

public class CollectionMonitor implements Hook {

    public static final String XPATH_RESULT = "/art:result";

    @Override
    public void setup(Node cfg) {
    }


    @Override
    public void execute(Artifact artifact, CallContext context, Document doc) {
        FLYSArtifact flys = (FLYSArtifact) artifact;

        Element result = (Element) XMLUtils.xpath(
            doc,
            XPATH_RESULT,
            XPathConstants.NODE,
            ArtifactNamespaceContext.INSTANCE);

        ElementCreator creator = new ElementCreator(
            doc,
            ArtifactNamespaceContext.NAMESPACE_URI,
            ArtifactNamespaceContext.NAMESPACE_PREFIX);

        Element recommended = creator.create("recommended-artifacts");
        result.appendChild(recommended);

        String[] outs              = extractOutputNames(flys, context);
        Map<String, Object> params = getNoneUserSpecificParameters(flys, context);

        Recommendations rec = Recommendations.getInstance();

        // TODO For newer official-lines recommendations we actually
        // need user-id (null here).
        rec.recommend(flys, null, outs, params, recommended);
    }


    /**
     * Get outputnames from current state (only the ones for which
     * facets exist).
     */
    public static String[] extractOutputNames(
        FLYSArtifact flys,
        CallContext  context)
    {
        if (flys instanceof ChartArtifact) {
            return new String[0];
        }

        List<Output>  outs = flys.getCurrentOutputs(context);

        int num = outs == null ? 0 : outs.size();

        String[] names = new String[num];

        for (int i = 0; i < num; i++) {
            names[i] = outs.get(i).getName();
        }

        return names;
    }


    protected Map<String, Object> getNoneUserSpecificParameters(
        FLYSArtifact flys,
        CallContext  context)
    {
        Map<String, Object> params = new HashMap<String, Object>(1);
        params.put("recommended", "true");

        return params;
    }
}
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