Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.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> |
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date | Wed, 14 Nov 2012 11:11:04 +0100 |
parents | 9136fc8f35f0 |
children |
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package de.intevation.flys.artifacts.services; import java.util.Iterator; 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.model.FastAnnotations; import de.intevation.flys.artifacts.model.LocationProvider; /** * This service provides information about distances of a specified river. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class DistanceInfoService extends FLYSService { /** The logger used in this service. */ private static Logger logger = Logger.getLogger(DistanceInfoService.class); public static final String RIVER_XPATH = "/art:river/text()"; public static final String FILTER_XPATH = "/art:river/art:filter/text()"; /** * The default constructor. */ public DistanceInfoService() { } @Override public Document doProcess( Document data, GlobalContext globalContext, CallMeta callMeta ) { logger.debug("DistanceInfoService.process"); String river = XMLUtils.xpathString( data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); String filterName = XMLUtils.xpathString( data, FILTER_XPATH, ArtifactNamespaceContext.INSTANCE); if (river == null || (river = river.trim()).length() == 0) { logger.warn("No river specified. Cannot return distance info!"); return XMLUtils.newDocument(); } logger.debug("Search distances for river: " + river); FastAnnotations fas = LocationProvider.getAnnotations(river); FastAnnotations.Filter filter = selectFilter(filterName); return buildDocument(fas.filter(filter)); } protected Document buildDocument( Iterator<FastAnnotations.Annotation> iter ) { Document result = XMLUtils.newDocument(); Element all = result.createElement("distances"); while (iter.hasNext()) { all.appendChild(buildNode(result, iter.next())); } result.appendChild(all); return result; } protected static FastAnnotations.Filter selectFilter(String name) { if (name != null) { if ("locations".equals(name)) return FastAnnotations.IS_POINT; if ("distances".equals(name)) return FastAnnotations.IS_RANGE; if ("measuringpoint".equals(name)) return new FastAnnotations.NameFilter("Messstelle"); } return FastAnnotations.ALL; } /** * Builds an Element for a distance info. * * @param an The Annotation that provides information about the distance. * * @return an Element that contains information about a distance. */ protected static Element buildNode( Document document, FastAnnotations.Annotation an ) { Element distance = document.createElement("distance"); distance.setAttribute("description", an.getPosition()); String riverSide = an.getAttribute(); if (riverSide != null && riverSide.length() > 0) { distance.setAttribute("riverside", riverSide); } distance.setAttribute("from", String.valueOf(an.getA())); double b = an.getB(); double bottom = an.getBottom(); double top = an.getTop(); if (!Double.isNaN(b)) { distance.setAttribute("to", String.valueOf(b)); } if (!Double.isNaN(bottom)) { distance.setAttribute("bottom", String.valueOf(bottom)); } if (!Double.isNaN(top)) { distance.setAttribute("top", String.valueOf(top)); } return distance; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :