001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_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.NetWorker;
057 import org.deegree.framework.util.StringTools;
058 import org.deegree.model.spatialschema.Envelope;
059 import org.deegree.model.spatialschema.GeometryFactory;
060 import org.deegree.model.spatialschema.Position;
061 import org.deegree.ogcwebservices.OGCWebServiceException;
062 import org.deegree.ogcwebservices.OWSUtils;
063 import org.deegree.ogcwebservices.wfs.capabilities.WFSCapabilities;
064 import org.deegree.ogcwebservices.wfs.operation.GetFeature;
065 import org.deegree.ogcwebservices.wms.operation.GetMap;
066 import org.deegree.portal.context.GeneralExtension;
067 import org.deegree.portal.context.IOSettings;
068 import org.deegree.portal.context.LayerExtension;
069 import org.deegree.portal.context.ViewContext;
070
071 /**
072 * This class is for highlighting polygons via a RPC request event from the client. A new WMS request will be created
073 * with SLD. The SLD xml file will be created and saved. The WMS request for highlighting will be set.
074 *
075 * <p>
076 * ------------------------------------------------------------------------
077 * </p>
078 *
079 * @author <a href="mailto:k.lupp@web.de>Katharina Lupp</a>
080 * @author last edited by: $Author: mays$
081 *
082 * @version $Revision: 18195 $, $Date: 27.05.2008 17:13:56$
083 */
084 public class HighlightingListener extends AbstractMapListener {
085
086 private static final ILogger LOG = LoggerFactory.getLogger( HighlightingListener.class );
087
088 // private String sldUserStyle = "highlightingSLDUserStyle.xml";
089 private String sldUserStyle = System.currentTimeMillis() + ".xml";
090
091 /**
092 * This method will be called by the <tt>MapListener</tt> if a highlighting action/event occurs.
093 */
094 @Override
095 public void actionPerformed( FormEvent event ) {
096
097 // default actions
098 super.actionPerformed( event );
099 RPCWebEvent rpc = (RPCWebEvent) event;
100 RPCMethodCall mc = rpc.getRPCMethodCall();
101 RPCParameter[] para = mc.getParameters();
102 RPCStruct struct = (RPCStruct) para[0].getValue();
103
104 HttpSession session = ( (HttpServletRequest) this.getRequest() ).getSession( true );
105 ViewContext vc = (ViewContext) session.getAttribute( "DefaultMapContext" );
106
107 try {
108 GetMap wmsRequest = createRequest( para, vc );
109 Position[] coords = getCoordinates( struct );
110 String queryLayer = getQueryLayer( struct );
111 Envelope env = wmsRequest.getBoundingBox();
112 StringBuffer sld = createSLD( coords, env, queryLayer, vc );
113 saveSLD( sld, vc );
114 highlight( queryLayer, wmsRequest, vc );
115 } catch ( Exception ex ) {
116 LOG.logError( "Highlighting was not successful: ", ex );
117 }
118
119 }
120
121 /**
122 * creates the modified WMS Request including the URL for the SLD.
123 */
124 private GetMap createRequest( RPCParameter[] para, ViewContext vc ) {
125
126 GeneralExtension ge = vc.getGeneral().getExtension();
127 IOSettings ios = ge.getIOSettings();
128 URL onlineResource = ios.getSLDDirectory().getOnlineResource();
129
130 RPCStruct struct = (RPCStruct) para[1].getValue();
131 RPCMember[] member = struct.getMembers();
132 String request = (String) member[0].getValue();
133 Map<String, String> getMR = KVP2Map.toMap( request );
134 getMR.put( "ID", "id" );
135 getMR.put( "FORMAT", "image/gif" );
136 getMR.put( "TRANSPARENT", "true" );
137 getMR.put( "SLD", NetWorker.url2String( onlineResource ) + "/" + sldUserStyle );
138 GetMap modifiedRequest = null;
139 try {
140 modifiedRequest = GetMap.create( getMR );
141 } catch ( Exception e ) {
142 e.printStackTrace();
143 }
144 return modifiedRequest;
145 }
146
147 /**
148 * calculates the coordinates of the click event.
149 */
150 private Position[] getCoordinates( RPCStruct struct ) {
151
152 String x = (String) struct.getMember( "X" ).getValue();
153 String y = (String) struct.getMember( "Y" ).getValue();
154 String[] tmpX = StringTools.toArray( x, ",", false );
155 String[] tmpY = StringTools.toArray( y, ",", false );
156
157 Position[] pos = new Position[tmpX.length];
158 for ( int i = 0; i < tmpX.length; i++ ) {
159 double xtmp = Double.parseDouble( tmpX[i] );
160 double ytmp = Double.parseDouble( tmpY[i] );
161 pos[i] = GeometryFactory.createPosition( xtmp, ytmp );
162 }
163
164 return pos;
165 }
166
167 /**
168 * gets the layer to be highlighted.
169 */
170 private String getQueryLayer( RPCStruct struct ) {
171 RPCMember queryLayers = struct.getMember( "queryLayers" );
172 String queryLay = (String) queryLayers.getValue();
173 int index = queryLay.indexOf( "|" );
174 queryLay = queryLay.substring( 0, index );
175
176 return queryLay;
177 }
178
179 /**
180 * sets the request for highlighting.
181 */
182 private void highlight( String queryLayer, GetMap gmr, ViewContext vc )
183 throws OGCWebServiceException {
184
185 URL wmsURL = vc.getLayerList().getLayer( queryLayer, null ).getServer().getOnlineResource();
186
187 String s = OWSUtils.validateHTTPGetBaseURL( wmsURL.toExternalForm() );
188 this.getRequest().setAttribute( "HighlightingRequest", s + gmr.getRequestParameter() );
189
190 }
191
192 /**
193 * creates the SLD xml file.
194 */
195 private StringBuffer createSLD( Position[] coords, Envelope env, String queryLay, ViewContext vc ) {
196 GeneralExtension ge = vc.getGeneral().getExtension();
197 IOSettings ios = ge.getIOSettings();
198 URL onlineResource = ios.getSLDDirectory().getOnlineResource();
199 LayerExtension le = vc.getLayerList().getLayer( queryLay, null ).getExtension();
200
201 WFSCapabilities capa = (WFSCapabilities) le.getDataService().getServer().getCapabilities();
202 URL wfsurl = OWSUtils.getHTTPGetOperationURL( capa, GetFeature.class );
203
204 StringBuffer sb = new StringBuffer( 10000 );
205
206 sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" );
207 sb.append( "<StyledLayerDescriptor version=\"1.0.0\" xmlns=\"http://www.opengis.net/sld\" " );
208 sb.append( "xmlns:gml=\"http://www.opengis.net/gml\" xmlns:wfs=\"http://www.opengis.net/wfs\" " );
209 sb.append( "xmlns:ogc=\"http://www.opengis.net/ogc\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" " );
210 sb.append( "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">" );
211 sb.append( "<UserLayer><Name>MyLayer</Name><RemoteOWS>" );
212 sb.append( "<Service>WFS</Service>" );
213 sb.append( "<OnlineResource xmlns:xlink='http://www.w3.org/1999/xlink' xlink:type='simple' " );
214 sb.append( "xlink:href='" + wfsurl.toExternalForm() + "'/>" );
215 sb.append( "</RemoteOWS><LayerFeatureConstraints><FeatureTypeConstraint>" );
216 sb.append( "<FeatureTypeName>" + queryLay + "</FeatureTypeName>" );
217 sb.append( "<ogc:Filter><ogc:And>" );
218 if ( coords.length > 1 )
219 sb.append( "<ogc:Or>" );
220 for ( int k = 0; k < coords.length; k++ ) {
221 sb.append( "<ogc:Intersects><ogc:PropertyName>GEOM</ogc:PropertyName>" );
222 sb.append( "<gml:Point><gml:coordinates>" + coords[k].getX() + "," );
223 sb.append( coords[k].getY() + "</gml:coordinates></gml:Point>" );
224 sb.append( "</ogc:Intersects>" );
225 }
226 if ( coords.length > 1 )
227 sb.append( "</ogc:Or>" );
228 sb.append( "<ogc:BBOX><ogc:PropertyName>GEOM</ogc:PropertyName>" );
229 sb.append( "<gml:Box><gml:coord><gml:X>" + env.getMin().getX() );
230 sb.append( "</gml:X><gml:Y>" + env.getMin().getY() + "</gml:Y>" );
231 sb.append( "</gml:coord><gml:coord><gml:X>" + env.getMax().getX() );
232 sb.append( "</gml:X><gml:Y>" + env.getMax().getY() + "</gml:Y>" );
233 sb.append( "</gml:coord></gml:Box></ogc:BBOX></ogc:And>" );
234 sb.append( "</ogc:Filter></FeatureTypeConstraint></LayerFeatureConstraints> " );
235
236 sb.append( "<UserStyle><FeatureTypeStyle><Rule><MinScaleDenominator>0" );
237 sb.append( "</MinScaleDenominator><MaxScaleDenominator>999999999" );
238 sb.append( "</MaxScaleDenominator><PolygonSymbolizer><Fill><GraphicFill>" );
239 sb.append( "<Graphic><ExternalGraphic><OnlineResource xmlns:xlink=" );
240 sb.append( "'http://www.w3.org/1999/xlink' xlink:type='simple' xlink:href='" );
241 sb.append( NetWorker.url2String( onlineResource ) + "/pattern.gif' />" );
242 sb.append( "<Format>image/gif</Format></ExternalGraphic></Graphic></GraphicFill>" );
243 sb.append( "</Fill><Stroke><CssParameter name=\"stroke\">#FF0000</CssParameter>" );
244 sb.append( "<CssParameter name=\"stroke-opacity\">1.0</CssParameter>" );
245 sb.append( "<CssParameter name=\"stroke-width\">1.0</CssParameter>" );
246 sb.append( "<CssParameter name=\"stroke-dasharray\">1</CssParameter>" );
247 sb.append( "</Stroke></PolygonSymbolizer></Rule></FeatureTypeStyle>" );
248 sb.append( "</UserStyle></UserLayer></StyledLayerDescriptor>" );
249
250 return sb;
251 }
252
253 /**
254 * saves the created SLD file.
255 */
256 private void saveSLD( StringBuffer sld, ViewContext vc )
257 throws IOException {
258 GeneralExtension ge = vc.getGeneral().getExtension();
259 IOSettings ios = ge.getIOSettings();
260 String dir = ios.getSLDDirectory().getDirectoryName();
261 OutputStreamWriter writer = new OutputStreamWriter( new FileOutputStream( dir + "/" + sldUserStyle ), "UTF-8" );
262 writer.write( sld.toString() );
263 writer.close();
264 }
265
266 }