Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/services/MapInfoService.java @ 6061:e9a76ffa0f9a
Use maxOverlap to get the correct gauge for the MainValues
Previously just the first matching gauge was taken even if it's
range ended with the minimum value. This code is clearly intended
to get one gauge for one range so the best match should be taken.
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Wed, 22 May 2013 18:10:48 +0200 |
parents | af13ceeba52a |
children | e4606eae8ea5 |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.services; import com.vividsolutions.jts.geom.Envelope; import org.dive4elements.artifactdatabase.XMLService; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifacts.GlobalContext; import org.dive4elements.artifacts.common.ArtifactNamespaceContext; import org.dive4elements.artifacts.common.utils.Config; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator; import org.dive4elements.river.utils.GeometryUtils; import java.util.HashMap; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; /** * 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_MAPTYPE = "/mapinfo/maptype/text()"; private static final String XPATH_RIVER_PROJECTION = "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/srid/@value"; private static final String XPATH_RIVER_BACKGROUND = "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/background-wms"; private static final String XPATH_RIVER_WMS = "/artifact-database/*[local-name()=$maptype]/river[@name=$river]/river-wms"; /** 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; } String mapType = extractMaptype(data); if (mapType == null || !(mapType.equals("floodmap") || mapType.equals("rivermap"))) { mapType = "floodmap"; } 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); if (logger.isDebugEnabled()) { 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("maptype", mapType); 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); } if (logger.isDebugEnabled()) { logger.debug("processXML: " + XMLUtils.toString(root)); } root.appendChild( createWMSElement("background-wms", XPATH_RIVER_BACKGROUND, vars, cr)); root.appendChild( createWMSElement("river-wms", XPATH_RIVER_WMS, vars, cr)); return result; } protected Element createWMSElement( String elementName, String xpath, Map<String, String> vars, ElementCreator cr) { logger.debug("createWMSElement()"); Element el = cr.create(elementName); Element wms = (Element)getNodeXPath(xpath, vars); if (wms != null) { cr.addAttr(el, "url", wms.getAttribute("url")); cr.addAttr(el, "layers", wms.getAttribute("layers")); logger.debug("createWMSElement: " + XMLUtils.toString(el)); } else { logger.debug("createWMSElement: wms == null"); } return el; } private static String extractRiver(Document data) { return XMLUtils.xpathString( data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); } private static String extractMaptype(Document data) { return XMLUtils.xpathString( data, XPATH_MAPTYPE, ArtifactNamespaceContext.INSTANCE); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :