001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcwebservices/wms/GetMapServiceInvokerForUL.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.ogcwebservices.wms;
037
038 import static java.lang.Boolean.FALSE;
039
040 import java.io.ByteArrayOutputStream;
041 import java.io.InputStreamReader;
042 import java.io.StringReader;
043 import java.net.URI;
044 import java.net.URL;
045 import java.util.Arrays;
046 import java.util.Iterator;
047 import java.util.List;
048 import java.util.Map;
049 import java.util.concurrent.Callable;
050
051 import org.deegree.datatypes.QualifiedName;
052 import org.deegree.framework.log.ILogger;
053 import org.deegree.framework.log.LoggerFactory;
054 import org.deegree.framework.util.CharsetUtils;
055 import org.deegree.framework.util.IDGenerator;
056 import org.deegree.framework.util.NetWorker;
057 import org.deegree.framework.xml.XMLFragment;
058 import org.deegree.graphics.MapFactory;
059 import org.deegree.graphics.sld.AbstractStyle;
060 import org.deegree.graphics.sld.FeatureTypeConstraint;
061 import org.deegree.graphics.sld.LayerFeatureConstraints;
062 import org.deegree.graphics.sld.RemoteOWS;
063 import org.deegree.graphics.sld.StyleUtils;
064 import org.deegree.graphics.sld.UserLayer;
065 import org.deegree.graphics.sld.UserStyle;
066 import org.deegree.model.feature.FeatureCollection;
067 import org.deegree.model.feature.GMLFeatureCollectionDocument;
068 import org.deegree.model.filterencoding.Filter;
069 import org.deegree.ogcbase.PropertyPath;
070 import org.deegree.ogcwebservices.OGCWebService;
071 import org.deegree.ogcwebservices.OGCWebServiceException;
072 import org.deegree.ogcwebservices.wfs.operation.FeatureResult;
073 import org.deegree.ogcwebservices.wfs.operation.GetFeature;
074 import org.w3c.dom.Element;
075
076 /**
077 * class for accessing the data of one user layer and creating <tt>DisplayElement</tt>s and a <tt>Thrme</tt> from it.
078 * The class extends <tt>Thread</tt> and implements the run method, so that a parallel data accessing from several
079 * layers is possible.
080 *
081 * @version $Revision: 18195 $
082 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
083 * @author last edited by: $Author: mschneider $
084 *
085 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
086 *
087 * @since 2.0
088 */
089 class GetMapServiceInvokerForUL extends GetMapServiceInvoker implements Callable<Object> {
090
091 private static final ILogger LOG = LoggerFactory.getLogger( GetMapServiceInvokerForUL.class );
092
093 private UserLayer layer = null;
094
095 private UserStyle[] styles = null;
096
097 /**
098 *
099 * @param handler
100 * @param layer
101 * @param scale
102 * current mapscale denominator
103 */
104 GetMapServiceInvokerForUL( DefaultGetMapHandler handler, UserLayer layer, double scale ) {
105 super( handler, scale );
106
107 this.layer = layer;
108 AbstractStyle[] tmp = layer.getStyles();
109 styles = new UserStyle[tmp.length];
110 for ( int i = 0; i < tmp.length; i++ ) {
111 styles[i] = (UserStyle) tmp[i];
112 }
113
114 }
115
116 public Object call() {
117
118 try {
119 if ( layer.getRemoteOWS() == null || layer.getRemoteOWS().getService().equals( RemoteOWS.WFS ) ) {
120 return handleWFS();
121 } else if ( layer.getRemoteOWS().getService().equals( RemoteOWS.WCS ) ) {
122 return handleWCS();
123 }
124
125 } catch ( OGCWebServiceException e ) {
126 return e;
127 } catch ( Exception e ) {
128 LOG.logError( e.getMessage(), e );
129 OGCWebServiceException exce = new OGCWebServiceException( "ServiceInvokerForUL: " + layer.getName(),
130 "Couldn't perform query!" );
131 return exce;
132 }
133
134 return null;
135 }
136
137 /**
138 * handles requests against a WFS
139 */
140 private Object handleWFS()
141 throws Exception {
142
143 FeatureCollection fc = null;
144 String request = createGetFeatureRequest();
145 LOG.logDebug( request );
146 if ( layer.getRemoteOWS() != null ) {
147 // handle request against a remote WFS
148 RemoteOWS remoteOWS = layer.getRemoteOWS();
149 URL url = remoteOWS.getOnlineResource();
150
151 NetWorker nw = new NetWorker( CharsetUtils.getSystemCharset(), url, request );
152 InputStreamReader isr = new InputStreamReader( nw.getInputStream(), CharsetUtils.getSystemCharset() );
153 GMLFeatureCollectionDocument doc = new GMLFeatureCollectionDocument();
154 doc.load( isr, url.toString() );
155 Element root = doc.getRootElement();
156
157 if ( root.getNodeName().indexOf( "Exception" ) > -1 ) {
158 ByteArrayOutputStream bos = new ByteArrayOutputStream( 1000 );
159 doc.write( bos );
160 throw new Exception( new String( bos.toByteArray() ) );
161 }
162 fc = doc.parse();
163 } else {
164 // handle request agaist a local WFS; this is bit problematic
165 // because deegree WMS is able to handle more than one
166 // local WFS. At the moment the WFS will be used that will
167 // returned by the WFServiceFactory as default
168 XMLFragment xml = new XMLFragment( new StringReader( request ), XMLFragment.DEFAULT_URL );
169 Element root = xml.getRootElement();
170 // create OGCWebServiceEvent object
171 IDGenerator idg = IDGenerator.getInstance();
172 GetFeature gfr = GetFeature.create( "" + idg.generateUniqueID(), root );
173
174 // returns the WFS responsible for handling current feature type
175 OGCWebService wfs = getResponsibleService( layer );
176 FeatureResult fr = (FeatureResult) wfs.doService( gfr );
177 fc = (FeatureCollection) fr.getResponse();
178 }
179 org.deegree.graphics.Layer fl = MapFactory.createFeatureLayer( layer.getName(), this.handler.getRequestCRS(),
180 fc );
181 return MapFactory.createTheme( layer.getName(), fl, styles );
182 }
183
184 /**
185 * creates a GetFeature request related to the UserLayer encapsulated in this object
186 */
187 private String createGetFeatureRequest()
188 throws Exception {
189
190 LayerFeatureConstraints lfc = layer.getLayerFeatureConstraints();
191 FeatureTypeConstraint[] ftc = lfc.getFeatureTypeConstraint();
192
193 List<UserStyle> styleList = Arrays.asList( styles );
194 List<PropertyPath> pp = StyleUtils.extractRequiredProperties( styleList, scaleDen );
195 LOG.logDebug( "required properties: ", pp );
196 pp = findGeoProperties( layer, ftc, pp );
197 Map<String, URI> namesp = extractNameSpaceDef( pp );
198 for ( int i = 0; i < ftc.length; i++ ) {
199 QualifiedName qn = ftc[i].getFeatureTypeName();
200 namesp.put( qn.getPrefix(), qn.getNamespace() );
201 }
202
203 StringBuffer sb = new StringBuffer( 5000 );
204 sb.append( "<?xml version='1.0' encoding='" + CharsetUtils.getSystemCharset() + "'?>" );
205 sb.append( "<GetFeature xmlns='http://www.opengis.net/wfs' " );
206 sb.append( "xmlns:ogc='http://www.opengis.net/ogc' " );
207 sb.append( "xmlns:gml='http://www.opengis.net/gml' " );
208
209 Iterator<String> iter = namesp.keySet().iterator();
210 while ( iter.hasNext() ) {
211 String pre = iter.next();
212 URI nsp = namesp.get( pre );
213 if ( !pre.equals( "xmlns" ) ) {
214 sb.append( "xmlns:" ).append( pre ).append( "='" );
215 sb.append( nsp.toASCIIString() ).append( "' " );
216 }
217 }
218
219 sb.append( "service='WFS' version='1.1.0' " );
220 sb.append( "outputFormat='text/xml; subtype=gml/3.1.1'>" );
221 for ( int i = 0; i < ftc.length; i++ ) {
222 QualifiedName qn = ftc[i].getFeatureTypeName();
223 sb.append( "<Query typeName='" ).append( qn.getPrefixedName() ).append( "'>" );
224
225 for ( int j = 0; j < pp.size(); j++ ) {
226 if ( !pp.get( j ).getAsString().endsWith( "$SCALE" ) ) {
227 // $SCALE is a dynamicly created property of each feature
228 // and can not be requested
229 sb.append( "<PropertyName>" ).append( pp.get( j ).getAsString() );
230 sb.append( "</PropertyName>" );
231 }
232 }
233
234 Filter filter = ftc[i].getFilter();
235 if ( filter != null ) {
236 sb.append( filter.to110XML() );
237 }
238 sb.append( "</Query>" );
239 }
240 sb.append( "</GetFeature>" );
241
242 LOG.logDebug( sb.toString() );
243
244 return sb.toString();
245 }
246
247 /**
248 * handles requests against a WCS
249 */
250 private Object handleWCS()
251 throws Exception {
252 return FALSE;
253 /*
254 * TODO RemoteOWS remoteOWS = layer.getRemoteOWS(); URL url = remoteOWS.getOnlineResource();
255 *
256 * NetWorker nw = new NetWorker( url ); MemoryCacheSeekableStream mcss = new MemoryCacheSeekableStream(
257 * nw.getInputStream() );
258 *
259 * RenderedOp rop = JAI.create("stream", mcss);
260 *
261 * GC_GridCoverage gc = new ImageGridCoverage(rop.getAsBufferedImage(), request.getBoundingBox(), reqCRS,
262 * false); mcss.close();
263 *
264 * org.deegree.graphics.Layer rl = MapFactory.createRasterLayer(layer.getName(), gc);
265 *
266 * putTheme(index, MapFactory.createTheme(layer.getName(), rl)); mcss.close(); increaseCounter();
267 */
268
269 }
270
271 }