Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 2199:7bac5afb9892
Skip 'inactive' points in output generation.
flys-artifacts/trunk@3815 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 30 Jan 2012 08:37:01 +0000 |
parents | e92bc9b0ca1d |
children | df4d6b286af8 |
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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; } 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 :