Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 4173:7d4480c0e68e
Allow users to select the current relevant discharge table in historical discharge table calculattion.
In addition to this, the discharge tables in the helper panel displayed in the client is ordered in time.
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 18 Oct 2012 12:13:48 +0200 |
parents | 8e66293c5369 |
children | 6aa1b8abe2d3 |
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package de.intevation.flys.artifacts.services; import org.apache.log4j.Logger; import java.util.Map; import java.util.HashMap; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.Element; import javax.xml.xpath.XPathConstants; import com.vividsolutions.jts.geom.Envelope; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.GlobalContext; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.Config; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; import de.intevation.artifactdatabase.XMLService; import de.intevation.flys.utils.GeometryUtils; /** * This service provides information about the supported rivers by this * application. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class MapInfoService extends XMLService { /** XPath that points to the river.*/ public static final String XPATH_RIVER = "/mapinfo/river/text()"; public static final String XPATH_RIVER_PROJECTION = "/artifact-database/floodmap/river[@name=$river]/srid/@value"; public static final String XPATH_RIVER_BACKGROUND = "/artifact-database/floodmap/river[@name=$river]/background-wms"; public static final String XPATH_RIVER_WMS = "/artifact-database/floodmap/river[@name=$river]/river-wms/@url"; /** The logger used in this service.*/ private static Logger logger = Logger.getLogger(MapInfoService.class); /** * The default constructor. */ public MapInfoService() { } protected static String getStringXPath( String query, Map<String, String> variables ) { return (String)XMLUtils.xpath( Config.getConfig(), query, XPathConstants.STRING, null, variables); } protected static Node getNodeXPath( String query, Map<String, String> variables ) { return (Node)XMLUtils.xpath( Config.getConfig(), query, XPathConstants.NODE, null, variables); } @Override public Document processXML( Document data, GlobalContext globalContext, CallMeta callMeta ) { logger.debug("MapInfoService.process"); Document result = XMLUtils.newDocument(); ElementCreator cr = new ElementCreator(result, null, null); Element mapinfo = cr.create("mapinfo"); result.appendChild(mapinfo); String river = extractRiver(data); if (river == null || river.length() == 0) { logger.warn("Cannot generate information: river is empty!"); return result; } Element root = cr.create("river"); cr.addAttr(root, "name", river); mapinfo.appendChild(root); Envelope env = GeometryUtils.getRiverBoundary(river); if (env != null) { String bounds = GeometryUtils.jtsBoundsToOLBounds(env); logger.debug("River '" + river + "' bounds: " + bounds); Element bbox = cr.create("bbox"); cr.addAttr(bbox, "value", bounds); root.appendChild(bbox); } Map<String, String> vars = new HashMap<String, String>(); vars.put("river", river); String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars); if (sridStr != null && sridStr.length() > 0) { Element srid = cr.create("srid"); cr.addAttr(srid, "value", sridStr); root.appendChild(srid); } Element back = (Element)getNodeXPath(XPATH_RIVER_BACKGROUND, vars); if (back != null) { Element background = cr.create("background-wms"); cr.addAttr(background, "url", back.getAttribute("url")); cr.addAttr(background, "layers", back.getAttribute("layers")); root.appendChild(background); } String wmsStr = getStringXPath(XPATH_RIVER_WMS, vars); if (wmsStr != null && wmsStr.length() > 0) { Element wms = cr.create("river-wms"); cr.addAttr(wms, "url", wmsStr); root.appendChild(wms); } return result; } protected String extractRiver(Document data) { return XMLUtils.xpathString( data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :