Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/GaugeInfoService.java @ 4210:e47559908acc
Cosmetics.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 22 Oct 2012 09:10:40 +0200 |
parents | 5e7da178daa6 |
children |
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package de.intevation.flys.artifacts.services; import java.util.ArrayList; import java.util.List; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.apache.log4j.Logger; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.GlobalContext; import de.intevation.flys.model.Gauge; import de.intevation.flys.model.Range; import de.intevation.flys.model.River; import de.intevation.flys.artifacts.model.RiverFactory; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class GaugeInfoService extends FLYSService { interface Filter { boolean apply(Gauge gauge); } private static final class ReferenceNumberFilter implements Filter { private long refNr; public ReferenceNumberFilter(long refNr) { this.refNr = refNr; } @Override public boolean apply(Gauge gauge) { if (logger.isDebugEnabled()) { logger.debug("Test gauge '" + gauge.getName() + "'"); } return gauge != null && gauge.getOfficialNumber() == refNr; } } // end of ReferenceNumberFilter class /** The logger that is used by this service.*/ private static Logger logger = Logger.getLogger(GaugeInfoService.class); public static final String XPATH_RIVERNAME = "/art:river/@name"; public static final String XPATH_REFERENCE_NR = "/art:river/art:filter/art:gauge/text()"; public GaugeInfoService() { } @Override public Document doProcess( Document data, GlobalContext context, CallMeta callMeta ) { logger.debug("GaugeInfoService.process"); if (logger.isDebugEnabled()) { logger.debug(XMLUtils.toString(data)); } River river = getRiverFromRequest(data); List<Filter> filters = getFilters(data); List<Gauge> allGauges = river.getGauges(); List<Gauge> filtered = new ArrayList<Gauge>(); for (Gauge g: allGauges) { for (Filter f: filters) { if (f.apply(g)) { filtered.add(g); break; } } } return buildInfoDocument(filtered); } protected River getRiverFromRequest(Document data) { String rivername = XMLUtils.xpathString( data, XPATH_RIVERNAME, ArtifactNamespaceContext.INSTANCE); logger.debug("Return Gauge info for River '" + rivername + "'"); return rivername != null ? RiverFactory.getRiver(rivername) : null; } protected List<Filter> getFilters(Document data) { List<Filter> filters = new ArrayList<Filter>(); String refNr = XMLUtils.xpathString( data, XPATH_REFERENCE_NR, ArtifactNamespaceContext.INSTANCE); if (refNr != null && refNr.length() > 0) { try { filters.add( new ReferenceNumberFilter(Long.parseLong(refNr))); } catch (NumberFormatException nfe) { logger.warn(nfe, nfe); } } return filters; } protected Document buildInfoDocument(List<Gauge> gauges) { Document doc = XMLUtils.newDocument(); ElementCreator cr = new ElementCreator( doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); Element service = cr.create("service"); logger.debug("Append " + gauges.size() + " gauges to info doc."); for (Gauge g: gauges) { Range r = g.getRange(); Element el = cr.create("gauge"); cr.addAttr(el, "name", g.getName()); cr.addAttr(el, "lower", String.valueOf(r.getA().doubleValue())); cr.addAttr(el, "upper", String.valueOf(r.getB().doubleValue())); service.appendChild(el); } doc.appendChild(service); return doc; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :