001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/ogcwebservices/wpvs/WFSInvoker.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstraße 19
030 53177 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042 ---------------------------------------------------------------------------*/
043
044 package org.deegree.ogcwebservices.wpvs;
045
046 import java.io.StringReader;
047 import java.util.ArrayList;
048
049 import org.deegree.datatypes.QualifiedName;
050 import org.deegree.datatypes.Types;
051 import org.deegree.framework.log.ILogger;
052 import org.deegree.framework.log.LoggerFactory;
053 import org.deegree.framework.util.CharsetUtils;
054 import org.deegree.framework.util.IDGenerator;
055 import org.deegree.framework.xml.XMLFragment;
056 import org.deegree.framework.xml.XMLTools;
057 import org.deegree.model.feature.Feature;
058 import org.deegree.model.feature.FeatureCollection;
059 import org.deegree.model.feature.FeatureProperty;
060 import org.deegree.model.feature.schema.FeatureType;
061 import org.deegree.model.feature.schema.PropertyType;
062 import org.deegree.model.filterencoding.ComplexFilter;
063 import org.deegree.model.filterencoding.FeatureFilter;
064 import org.deegree.model.filterencoding.FeatureId;
065 import org.deegree.model.filterencoding.Filter;
066 import org.deegree.model.spatialschema.GMLGeometryAdapter;
067 import org.deegree.model.spatialschema.GeometryException;
068 import org.deegree.ogcbase.PropertyPath;
069 import org.deegree.ogcwebservices.OGCWebService;
070 import org.deegree.ogcwebservices.OGCWebServiceException;
071 import org.deegree.ogcwebservices.wfs.operation.FeatureResult;
072 import org.deegree.ogcwebservices.wfs.operation.GetFeature;
073 import org.deegree.ogcwebservices.wpvs.configuration.AbstractDataSource;
074 import org.deegree.ogcwebservices.wpvs.configuration.LocalWFSDataSource;
075 import org.deegree.ogcwebservices.wpvs.j3d.DefaultSurface;
076 import org.deegree.ogcwebservices.wpvs.j3d.Object3DFactory;
077 import org.deegree.ogcwebservices.wpvs.j3d.PointsToPointListFactory;
078 import org.deegree.ogcwebservices.wpvs.utils.ResolutionStripe;
079 import org.w3c.dom.Document;
080
081 /**
082 * Invoker for a Web Feature Service.
083 *
084 * @author <a href="mailto:taddei@lat-lon.de">Ugo Taddei</a>
085 * @author last edited by: $Author: rbezema $
086 *
087 * $Revision: 12293 $, $Date: 2008-06-11 10:28:37 +0200 (Mi, 11 Jun 2008) $
088 *
089 */
090 public class WFSInvoker extends GetViewServiceInvoker {
091
092 private static final ILogger LOG = LoggerFactory.getLogger( WFSInvoker.class );
093
094 /* whether the returned data is a 3D object or data for the elevation model */
095 private final boolean isElevationModelRequest;
096
097 private int id;
098
099 /**
100 * Creates a new instance of this class.
101 *
102 * @param owner
103 * the ResolutionStripe that calls this invoker
104 * @param id
105 * @param isElevationModelRequest
106 */
107 public WFSInvoker( ResolutionStripe owner, int id, boolean isElevationModelRequest ) {
108 super( owner );
109 this.id = id;
110 this.isElevationModelRequest = isElevationModelRequest;
111 }
112
113 @Override
114 public void invokeService( AbstractDataSource dataSource ) {
115 if ( !( dataSource instanceof LocalWFSDataSource ) ) {
116 LOG.logError( "The given AbstractDataSource is no WFSDataSource instance. It is needed for a WFSInvoker" );
117 throw new RuntimeException( "DataSource should be a WFS-instance for a WFSInvoker" );
118 }
119 OGCWebService service = null;
120 try {
121 service = dataSource.getOGCWebService();
122 } catch ( OGCWebServiceException ogcwe ) {
123 LOG.logError( ogcwe.getMessage() );
124 }
125 Object response = null;
126 try {
127 GetFeature getFeature = createGetFeatureRequest( (LocalWFSDataSource) dataSource );
128 if ( service != null ) {
129 response = service.doService( getFeature );
130 } else {
131 LOG.logError( "The (WFS) service was null, therefore no response was given" );
132 }
133 } catch ( OGCWebServiceException ogcwse ) {
134 if ( !Thread.currentThread().isInterrupted() ) {
135 LOG.logError( "Exception while performing WFS-GetFeature: ", ogcwse );
136 }
137 return;
138 }
139
140 if ( response != null && response instanceof FeatureResult ) {
141 FeatureCollection result = (FeatureCollection) ( (FeatureResult) response ).getResponse();
142 if ( result != null ) {
143 if ( isElevationModelRequest ) {
144 PointsToPointListFactory ptpFac = new PointsToPointListFactory();
145 resolutionStripe.setElevationModelFromMeassurePoints( ptpFac.createFromFeatureCollection( result ) );
146 } else {
147 Object3DFactory o3DFactory = new Object3DFactory();
148 for ( int i = 0; i < result.size(); ++i ) {
149 Feature feature = result.getFeature( i );
150 createSurfaces( o3DFactory, feature );
151 }
152 }
153 }
154 } else {
155 LOG.logError( "ERROR while invoking wfs-datasource: " + dataSource.getName()
156 + " the result was no WFS-response or no FeatureResult instance" );
157 }
158
159 }
160
161 /**
162 * This method recursively constructs all the surfaces contained in the given feature. If the
163 * Feature contains a PropertyType of {@link Types#FEATURE} this Feature will also be traversed,
164 * if it contains a {@link Types#GEOMETRY} a {@link DefaultSurface} will be created.
165 *
166 * @param o3DFactory
167 * the Factory to create the defaultservice
168 * @param feature
169 * the feature to traverse.
170 */
171 private void createSurfaces( Object3DFactory o3DFactory, Feature feature ) {
172
173 FeatureType ft = feature.getFeatureType();
174 PropertyType[] propertyTypes = ft.getProperties();
175 for ( PropertyType pt : propertyTypes ) {
176 if ( pt.getType() == Types.FEATURE ) {
177 FeatureProperty[] fp = feature.getProperties( pt.getName() );
178 if ( fp != null ) {
179 for ( int i = 0; i < fp.length; i++ ) {
180 createSurfaces( o3DFactory, (Feature) fp[i].getValue() );
181 }
182 }
183 } else if ( pt.getType() == Types.GEOMETRY ) {
184 DefaultSurface ds = o3DFactory.createSurface( feature );
185 if ( ds != null ) {
186 resolutionStripe.addFeature( id + "_" + ds.getDefaultSurfaceID(), ds );
187 }
188 }
189 }
190 }
191
192 /**
193 * Creates a new <code>GetFeature</code> object from an "XML-String" not nice.
194 *
195 * @param ds
196 * the datasource containig service data
197 * @param id
198 * the request id
199 * @return a new GetFeature request
200 * @throws GeometryException
201 * @throws OGCWebServiceException
202 * @throws Exception
203 */
204 private GetFeature createGetFeatureRequest( LocalWFSDataSource dataSource /*
205 * String id,
206 * Surface[] boxes
207 */)
208 throws OGCWebServiceException {
209
210 QualifiedName qn = dataSource.getName();
211
212 StringBuilder sb = new StringBuilder( 5000 );
213 sb.append( "<?xml version='1.0' encoding='" + CharsetUtils.getSystemCharset() + "'?>" );
214 sb.append( "<wfs:GetFeature xmlns:wfs='http://www.opengis.net/wfs' " );
215 sb.append( "xmlns:ogc='http://www.opengis.net/ogc' " );
216 sb.append( "xmlns:gml='http://www.opengis.net/gml' " );
217 sb.append( "xmlns:" ).append( qn.getPrefix() ).append( '=' );
218 sb.append( "'" ).append( qn.getNamespace() ).append( "' " );
219 if ( dataSource.getMaxFeatures() > 0 ) {
220 sb.append( "maxFeatures='" ).append( dataSource.getMaxFeatures() ).append( "' " );
221 }
222
223 if ( dataSource.getServiceType() == AbstractDataSource.LOCAL_WFS ) {
224 sb.append( "outputFormat='FEATURECOLLECTION'>" );
225 } else {
226 sb.append( "outputFormat='text/xml; subtype=gml/3.1.1'>" );
227 }
228
229 /**
230 * To make things a little clearer compare with this SQL-Statement: SELECT ( !texture )?
231 * geoProperty : * FROM qn.getLocalName() WHERE geoPoperty intersects with
232 * resolutionStripe.getSurface() AND FilterConditions.
233 */
234 PropertyPath geoProperty = dataSource.getGeometryProperty();
235
236 // FROM
237 sb.append( "<wfs:Query typeName='" ).append( qn.getPrefix() ).append( ":" );
238 sb.append( qn.getLocalName() ).append( "'>" );
239
240 // SELECT
241 /*
242 * if ( !isElevationModelRequest ) { sb.append( "<wfs:PropertyName>" ); sb.append(
243 * geoProperty.getAsString() ); sb.append( "</wfs:PropertyName>" ); }
244 */
245
246 StringBuffer sbArea = GMLGeometryAdapter.exportAsEnvelope( resolutionStripe.getSurface().getEnvelope() );
247
248 // WHERE
249 sb.append( "<ogc:Filter>" );
250
251 // AND
252 Filter filter = dataSource.getFilter();
253 if ( filter != null ) {
254 if ( filter instanceof ComplexFilter ) {
255 sb.append( "<ogc:And>" );
256 sb.append( "<ogc:Intersects>" );
257 sb.append( "<wfs:PropertyName>" );
258 sb.append( geoProperty.getAsString() );
259 sb.append( "</wfs:PropertyName>" );
260 sb.append( sbArea );
261 sb.append( "</ogc:Intersects>" );
262 // add filter as defined in the layers datasource description
263 // to the filter expression
264 org.deegree.model.filterencoding.Operation op = ( (ComplexFilter) filter ).getOperation();
265 sb.append( op.toXML() ).append( "</ogc:And>" );
266 } else {
267 if ( filter instanceof FeatureFilter ) {
268 ArrayList<FeatureId> featureIds = ( (FeatureFilter) filter ).getFeatureIds();
269 if ( featureIds.size() != 0 )
270 sb.append( "<ogc:And>" );
271 for ( FeatureId fid : featureIds ) {
272 sb.append( fid.toXML() );
273 }
274 if ( featureIds.size() != 0 )
275 sb.append( "</ogc:And>" );
276 }
277 }
278 } else {
279 sb.append( "<ogc:Intersects>" );
280 sb.append( "<wfs:PropertyName>" );
281 sb.append( geoProperty.getAsString() );
282 sb.append( "</wfs:PropertyName>" );
283 sb.append( sbArea );
284 sb.append( "</ogc:Intersects>" );
285 }
286
287 sb.append( "</ogc:Filter></wfs:Query></wfs:GetFeature>" );
288
289 Document doc;
290 try {
291 doc = XMLTools.parse( new StringReader( sb.toString() ) );
292 } catch ( Exception e ) {
293 LOG.logError( e.getMessage(), e );
294 throw new OGCWebServiceException( e.getMessage() );
295 }
296
297 if ( LOG.getLevel() == ILogger.LOG_DEBUG ) {
298 XMLFragment d = new XMLFragment( doc.getDocumentElement() );
299 LOG.logDebug( d.getAsPrettyString() );
300 }
301
302 IDGenerator idg = IDGenerator.getInstance();
303 return GetFeature.create( String.valueOf( idg.generateUniqueID() ), doc.getDocumentElement() );
304 }
305
306 }