view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/RiverInfoService.java @ 4496:d8992459b408

Add method to return the facets of an artifact This methos should be used to get the facets of an artifact instead of accessing the facets member variable directly.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 14 Nov 2012 11:11:04 +0100
parents 5da024c2af62
children
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package de.intevation.flys.artifacts.services;

import java.math.BigDecimal;

import org.apache.log4j.Logger;

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

import de.intevation.artifacts.CallMeta;
import de.intevation.artifacts.GlobalContext;
import de.intevation.artifacts.common.ArtifactNamespaceContext;
import de.intevation.artifacts.common.utils.XMLUtils;

import de.intevation.flys.artifacts.model.RiverFactory;
import de.intevation.flys.model.River;

/**
 * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
 */
public class RiverInfoService extends FLYSService {

    private static final Logger logger = Logger.getLogger(
            RiverInfoService.class);

    protected static final String RIVER_XPATH = "/art:river/text()";

    protected XMLUtils.ElementCreator ec;
    protected River river;
    protected Element riverele;

    protected Document doProcess(
        Document      data,
        GlobalContext globalContext,
        CallMeta      callMeta
    ) {
        String rivername = XMLUtils.xpathString(
            data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE);

        river = RiverFactory.getRiver(rivername);

        Document result = XMLUtils.newDocument();

        if (river == null) {
            logger.warn("No river with name " + rivername + " found.");
            return null;
        }

        ec = new XMLUtils.ElementCreator(
            result,
            ArtifactNamespaceContext.NAMESPACE_URI,
            ArtifactNamespaceContext.NAMESPACE_PREFIX);

        riverele = ec.create("river-info");

        double[] minmax  = river.determineMinMaxDistance();
        double[] minmaxq = river.determineMinMaxQ();

        Element r = ec.create("river");
        ec.addAttr(r, "name", river.getName(), true);
        ec.addAttr(r, "start", Double.toString(minmax[0]), true);
        ec.addAttr(r, "end", Double.toString(minmax[1]), true);
        ec.addAttr(r, "wstunit", river.getWstUnit().getName(), true);
        ec.addAttr(r, "kmup", Boolean.toString(river.getKmUp()), true);
        ec.addAttr(r, "minq", Double.toString(minmaxq[0]), true);
        ec.addAttr(r, "maxq", Double.toString(minmaxq[1]), true);
        ec.addAttr(r, "official", Long.toString(river.getOfficialNumber()),
                    true);

        riverele.appendChild(r);
        result.appendChild(riverele);

        return result;
    }

    /**
     * Returns a Double as String from a BigDecimal value.
     *
     * If value is null an empty String is returned.
     */
    protected static String getStringValue(BigDecimal value) {
        return value != null
            ? Double.toString(value.doubleValue()) : "";
    }
}

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