001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/portal/standard/gazetteer/LoadBBOXListener.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 - Department of Geography, University of Bonn -
006 and
007 - lat/lon GmbH -
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.portal.standard.gazetteer;
037
038 import java.io.IOException;
039 import java.util.Map;
040
041 import org.deegree.crs.coordinatesystems.ProjectedCRS;
042 import org.deegree.datatypes.QualifiedName;
043 import org.deegree.enterprise.control.ajax.ResponseHandler;
044 import org.deegree.enterprise.control.ajax.WebEvent;
045 import org.deegree.framework.log.ILogger;
046 import org.deegree.framework.log.LoggerFactory;
047 import org.deegree.framework.util.Pair;
048 import org.deegree.framework.util.Parameter;
049 import org.deegree.model.crs.CoordinateSystem;
050 import org.deegree.model.crs.GeoTransformer;
051 import org.deegree.model.spatialschema.Envelope;
052 import org.deegree.model.spatialschema.Geometry;
053 import org.deegree.model.spatialschema.Point;
054 import org.deegree.portal.Constants;
055 import org.deegree.portal.context.Module;
056 import org.deegree.portal.context.ViewContext;
057
058 /**
059 * TODO add class documentation here
060 *
061 * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
062 * @author last edited by: $Author: apoth $
063 *
064 * @version $Revision: 25263 $, $Date: 2010-07-12 16:49:55 +0200 (Mo, 12. Jul 2010) $
065 */
066 public class LoadBBOXListener extends AbstractGazetteerListener {
067
068 private static final ILogger LOG = LoggerFactory.getLogger( LoadBBOXListener.class );
069
070 /*
071 * (non-Javadoc)
072 *
073 * @see
074 * org.deegree.enterprise.control.ajax.AbstractListener#actionPerformed(org.deegree.enterprise.control.ajax.WebEvent
075 * , org.deegree.enterprise.control.ajax.ResponseHandler)
076 */
077 @SuppressWarnings("unchecked")
078 public void actionPerformed( WebEvent event, ResponseHandler responseHandler )
079 throws IOException {
080 Map<String, Object> param = event.getParameter();
081 int index = ( (Number) param.get( "level" ) ).intValue();
082 int hierarchyIndex = Integer.parseInt( (String) param.get( "hierarchyIndex" ) );
083 String geographicIdentifier = (String) param.get( "geographicIdentifier" );
084
085 ViewContext vc = (ViewContext) event.getSession().getAttribute( Constants.CURRENTMAPCONTEXT );
086 Module[] modules = vc.getGeneral().getExtension().getFrontend().getModulesByName( "Gazetteer" );
087 Parameter[] parameters = modules[0].getParameter().getParameters();
088 // just one gazetteer module is allowed to be contained in an instance of iGeoPortal
089 Hierarchy hierarchy;
090 try {
091 hierarchy = loadHierarchy( (String) parameters[hierarchyIndex].getValue() );
092 } catch ( Exception e ) {
093 LOG.logError( e );
094 responseHandler.writeAndClose( "ERROR: can not load hierarchy list" );
095 return;
096 }
097
098 HierarchyNode node = hierarchy.getRoot();
099 int k = 0;
100 while ( node != null && k < index ) {
101 node = node.getChildNode();
102 k++;
103 }
104 QualifiedName ft = node.getFeatureType();
105 LoadBBOXCommand cmd = new LoadBBOXCommand( hierarchy.getGazetteerAddress(), ft, node.getProperties(),
106 geographicIdentifier );
107 Envelope env = null;
108 Pair<Geometry, Geometry> geometries = null;
109 try {
110 // first contains highlight geometry; second geographic extent
111 geometries = cmd.execute();
112 if ( geometries.first instanceof Point ) {
113 // heuristic to ensure a useful bounding box. This may fails with compound CRS
114 if ( geometries.second.getCoordinateSystem().getCRS() instanceof ProjectedCRS ) {
115 env = geometries.second.getBuffer( 50 ).getEnvelope();
116 } else {
117 env = geometries.second.getBuffer( 0.001 ).getEnvelope();
118 }
119 } else {
120 env = geometries.second.getEnvelope();
121 }
122 } catch ( Exception e ) {
123 LOG.logError( e );
124 responseHandler.writeAndClose( "ERROR: could not find/load envelope for geographicIdentifier: "
125 + geographicIdentifier );
126 return;
127 }
128
129 CoordinateSystem crs = vc.getGeneral().getBoundingBox()[0].getCoordinateSystem();
130 if ( !crs.equals( env.getCoordinateSystem() ) ) {
131 GeoTransformer gt = new GeoTransformer( crs );
132 try {
133 env = gt.transform( env, env.getCoordinateSystem() );
134 event.getSession().setAttribute( "TEMP_WMS_GEOMETRY", gt.transform( geometries.first ) );
135 } catch ( Exception e ) {
136 LOG.logError( e );
137 responseHandler.writeAndClose( "ERROR: can not transform geographic extent into map CRS" );
138 return;
139 }
140 } else {
141 event.getSession().setAttribute( "TEMP_WMS_GEOMETRY", geometries.first );
142 }
143 responseHandler.writeAndClose( env.getMin().getX() + "," + env.getMin().getY() + "," + env.getMax().getX()+ "," + env.getMax().getY() );
144 }
145
146 }