001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/portal/standard/wms/control/HighlightingListener.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.wms.control;
037
038 import java.io.FileOutputStream;
039 import java.io.IOException;
040 import java.io.OutputStreamWriter;
041 import java.net.URL;
042 import java.util.Map;
043
044 import javax.servlet.http.HttpServletRequest;
045 import javax.servlet.http.HttpSession;
046
047 import org.deegree.enterprise.control.FormEvent;
048 import org.deegree.enterprise.control.RPCMember;
049 import org.deegree.enterprise.control.RPCMethodCall;
050 import org.deegree.enterprise.control.RPCParameter;
051 import org.deegree.enterprise.control.RPCStruct;
052 import org.deegree.enterprise.control.RPCWebEvent;
053 import org.deegree.framework.log.ILogger;
054 import org.deegree.framework.log.LoggerFactory;
055 import org.deegree.framework.util.KVP2Map;
056 import org.deegree.framework.util.StringTools;
057 import org.deegree.model.spatialschema.Envelope;
058 import org.deegree.model.spatialschema.GeometryFactory;
059 import org.deegree.model.spatialschema.Position;
060 import org.deegree.ogcwebservices.OGCWebServiceException;
061 import org.deegree.ogcwebservices.OWSUtils;
062 import org.deegree.ogcwebservices.wfs.capabilities.WFSCapabilities;
063 import org.deegree.ogcwebservices.wfs.operation.GetFeature;
064 import org.deegree.ogcwebservices.wms.operation.GetMap;
065 import org.deegree.portal.context.GeneralExtension;
066 import org.deegree.portal.context.IOSettings;
067 import org.deegree.portal.context.LayerExtension;
068 import org.deegree.portal.context.ViewContext;
069
070 /**
071 * This class is for highlighting polygons via a RPC request event from the client. A new WMS request will be created
072 * with SLD. The SLD xml file will be created and saved. The WMS request for highlighting will be set.
073 *
074 * <p>
075 * ------------------------------------------------------------------------
076 * </p>
077 *
078 * @author <a href="mailto:k.lupp@web.de>Katharina Lupp</a>
079 * @author last edited by: $Author: mays$
080 *
081 * @version $Revision: 24806 $, $Date: 27.05.2008 17:13:56$
082 */
083 public class HighlightingListener extends AbstractMapListener {
084
085 private static final ILogger LOG = LoggerFactory.getLogger( HighlightingListener.class );
086
087 // private String sldUserStyle = "highlightingSLDUserStyle.xml";
088 private String sldUserStyle = System.currentTimeMillis() + ".xml";
089
090 /**
091 * This method will be called by the <tt>MapListener</tt> if a highlighting action/event occurs.
092 */
093 @Override
094 public void actionPerformed( FormEvent event ) {
095
096 // default actions
097 super.actionPerformed( event );
098 RPCWebEvent rpc = (RPCWebEvent) event;
099 RPCMethodCall mc = rpc.getRPCMethodCall();
100 RPCParameter[] para = mc.getParameters();
101 RPCStruct struct = (RPCStruct) para[0].getValue();
102
103 HttpSession session = ( (HttpServletRequest) this.getRequest() ).getSession( true );
104 ViewContext vc = (ViewContext) session.getAttribute( "DefaultMapContext" );
105
106 try {
107 GetMap wmsRequest = createRequest( para, vc );
108 Position[] coords = getCoordinates( struct );
109 String queryLayer = getQueryLayer( struct );
110 Envelope env = wmsRequest.getBoundingBox();
111 StringBuffer sld = createSLD( coords, env, queryLayer, vc );
112 saveSLD( sld, vc );
113 highlight( queryLayer, wmsRequest, vc );
114 } catch ( Exception ex ) {
115 LOG.logError( "Highlighting was not successful: ", ex );
116 }
117
118 }
119
120 /**
121 * creates the modified WMS Request including the URL for the SLD.
122 */
123 private GetMap createRequest( RPCParameter[] para, ViewContext vc ) {
124
125 GeneralExtension ge = vc.getGeneral().getExtension();
126 IOSettings ios = ge.getIOSettings();
127 URL onlineResource = ios.getSLDDirectory().getOnlineResource();
128
129 RPCStruct struct = (RPCStruct) para[1].getValue();
130 RPCMember[] member = struct.getMembers();
131 String request = (String) member[0].getValue();
132 Map<String, String> getMR = KVP2Map.toMap( request );
133 getMR.put( "ID", "id" );
134 getMR.put( "FORMAT", "image/gif" );
135 getMR.put( "TRANSPARENT", "true" );
136 getMR.put( "SLD", onlineResource.toExternalForm() + "/" + sldUserStyle );
137 GetMap modifiedRequest = null;
138 try {
139 modifiedRequest = GetMap.create( getMR );
140 } catch ( Exception e ) {
141 e.printStackTrace();
142 }
143 return modifiedRequest;
144 }
145
146 /**
147 * calculates the coordinates of the click event.
148 */
149 private Position[] getCoordinates( RPCStruct struct ) {
150
151 String x = (String) struct.getMember( "X" ).getValue();
152 String y = (String) struct.getMember( "Y" ).getValue();
153 String[] tmpX = StringTools.toArray( x, ",", false );
154 String[] tmpY = StringTools.toArray( y, ",", false );
155
156 Position[] pos = new Position[tmpX.length];
157 for ( int i = 0; i < tmpX.length; i++ ) {
158 double xtmp = Double.parseDouble( tmpX[i] );
159 double ytmp = Double.parseDouble( tmpY[i] );
160 pos[i] = GeometryFactory.createPosition( xtmp, ytmp );
161 }
162
163 return pos;
164 }
165
166 /**
167 * gets the layer to be highlighted.
168 */
169 private String getQueryLayer( RPCStruct struct ) {
170 RPCMember queryLayers = struct.getMember( "queryLayers" );
171 String queryLay = (String) queryLayers.getValue();
172 int index = queryLay.indexOf( "|" );
173 queryLay = queryLay.substring( 0, index );
174
175 return queryLay;
176 }
177
178 /**
179 * sets the request for highlighting.
180 */
181 private void highlight( String queryLayer, GetMap gmr, ViewContext vc )
182 throws OGCWebServiceException {
183
184 URL wmsURL = vc.getLayerList().getLayer( queryLayer, null ).getServer().getOnlineResource();
185
186 String s = OWSUtils.validateHTTPGetBaseURL( wmsURL.toExternalForm() );
187 this.getRequest().setAttribute( "HighlightingRequest", s + gmr.getRequestParameter() );
188
189 }
190
191 /**
192 * creates the SLD xml file.
193 */
194 private StringBuffer createSLD( Position[] coords, Envelope env, String queryLay, ViewContext vc ) {
195 GeneralExtension ge = vc.getGeneral().getExtension();
196 IOSettings ios = ge.getIOSettings();
197 URL onlineResource = ios.getSLDDirectory().getOnlineResource();
198 LayerExtension le = vc.getLayerList().getLayer( queryLay, null ).getExtension();
199
200 WFSCapabilities capa = (WFSCapabilities) le.getDataService().getServer().getCapabilities();
201 URL wfsurl = OWSUtils.getHTTPGetOperationURL( capa, GetFeature.class );
202
203 StringBuffer sb = new StringBuffer( 10000 );
204
205 sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" );
206 sb.append( "<StyledLayerDescriptor version=\"1.0.0\" xmlns=\"http://www.opengis.net/sld\" " );
207 sb.append( "xmlns:gml=\"http://www.opengis.net/gml\" xmlns:wfs=\"http://www.opengis.net/wfs\" " );
208 sb.append( "xmlns:ogc=\"http://www.opengis.net/ogc\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" " );
209 sb.append( "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">" );
210 sb.append( "<UserLayer><Name>MyLayer</Name><RemoteOWS>" );
211 sb.append( "<Service>WFS</Service>" );
212 sb.append( "<OnlineResource xmlns:xlink='http://www.w3.org/1999/xlink' xlink:type='simple' " );
213 sb.append( "xlink:href='" + wfsurl.toExternalForm() + "'/>" );
214 sb.append( "</RemoteOWS><LayerFeatureConstraints><FeatureTypeConstraint>" );
215 sb.append( "<FeatureTypeName>" + queryLay + "</FeatureTypeName>" );
216 sb.append( "<ogc:Filter><ogc:And>" );
217 if ( coords.length > 1 )
218 sb.append( "<ogc:Or>" );
219 for ( int k = 0; k < coords.length; k++ ) {
220 sb.append( "<ogc:Intersects><ogc:PropertyName>GEOM</ogc:PropertyName>" );
221 sb.append( "<gml:Point><gml:coordinates>" + coords[k].getX() + "," );
222 sb.append( coords[k].getY() + "</gml:coordinates></gml:Point>" );
223 sb.append( "</ogc:Intersects>" );
224 }
225 if ( coords.length > 1 )
226 sb.append( "</ogc:Or>" );
227 sb.append( "<ogc:BBOX><ogc:PropertyName>GEOM</ogc:PropertyName>" );
228 sb.append( "<gml:Box><gml:coord><gml:X>" + env.getMin().getX() );
229 sb.append( "</gml:X><gml:Y>" + env.getMin().getY() + "</gml:Y>" );
230 sb.append( "</gml:coord><gml:coord><gml:X>" + env.getMax().getX() );
231 sb.append( "</gml:X><gml:Y>" + env.getMax().getY() + "</gml:Y>" );
232 sb.append( "</gml:coord></gml:Box></ogc:BBOX></ogc:And>" );
233 sb.append( "</ogc:Filter></FeatureTypeConstraint></LayerFeatureConstraints> " );
234
235 sb.append( "<UserStyle><FeatureTypeStyle><Rule><MinScaleDenominator>0" );
236 sb.append( "</MinScaleDenominator><MaxScaleDenominator>999999999" );
237 sb.append( "</MaxScaleDenominator><PolygonSymbolizer><Fill><GraphicFill>" );
238 sb.append( "<Graphic><ExternalGraphic><OnlineResource xmlns:xlink=" );
239 sb.append( "'http://www.w3.org/1999/xlink' xlink:type='simple' xlink:href='" );
240 sb.append( onlineResource.toExternalForm() + "/pattern.gif' />" );
241 sb.append( "<Format>image/gif</Format></ExternalGraphic></Graphic></GraphicFill>" );
242 sb.append( "</Fill><Stroke><CssParameter name=\"stroke\">#FF0000</CssParameter>" );
243 sb.append( "<CssParameter name=\"stroke-opacity\">1.0</CssParameter>" );
244 sb.append( "<CssParameter name=\"stroke-width\">1.0</CssParameter>" );
245 sb.append( "<CssParameter name=\"stroke-dasharray\">1</CssParameter>" );
246 sb.append( "</Stroke></PolygonSymbolizer></Rule></FeatureTypeStyle>" );
247 sb.append( "</UserStyle></UserLayer></StyledLayerDescriptor>" );
248
249 return sb;
250 }
251
252 /**
253 * saves the created SLD file.
254 */
255 private void saveSLD( StringBuffer sld, ViewContext vc )
256 throws IOException {
257 GeneralExtension ge = vc.getGeneral().getExtension();
258 IOSettings ios = ge.getIOSettings();
259 String dir = ios.getSLDDirectory().getDirectoryName();
260 OutputStreamWriter writer = new OutputStreamWriter( new FileOutputStream( dir + "/" + sldUserStyle ), "UTF-8" );
261 writer.write( sld.toString() );
262 writer.close();
263 }
264
265 }