001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcwebservices/wmps/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.wmps;
037    
038    import java.io.ByteArrayOutputStream;
039    import java.io.InputStreamReader;
040    import java.io.StringReader;
041    import java.net.URL;
042    
043    import org.deegree.framework.log.ILogger;
044    import org.deegree.framework.log.LoggerFactory;
045    import org.deegree.framework.util.CharsetUtils;
046    import org.deegree.framework.util.IDGenerator;
047    import org.deegree.framework.util.NetWorker;
048    import org.deegree.framework.util.StringTools;
049    import org.deegree.framework.xml.XMLFragment;
050    import org.deegree.graphics.MapFactory;
051    import org.deegree.graphics.sld.AbstractStyle;
052    import org.deegree.graphics.sld.FeatureTypeConstraint;
053    import org.deegree.graphics.sld.LayerFeatureConstraints;
054    import org.deegree.graphics.sld.RemoteOWS;
055    import org.deegree.graphics.sld.UserLayer;
056    import org.deegree.graphics.sld.UserStyle;
057    import org.deegree.model.feature.FeatureCollection;
058    import org.deegree.model.feature.GMLFeatureCollectionDocument;
059    import org.deegree.model.filterencoding.Filter;
060    import org.deegree.ogcwebservices.OGCWebServiceException;
061    import org.deegree.ogcwebservices.wfs.WFService;
062    import org.deegree.ogcwebservices.wfs.operation.FeatureResult;
063    import org.deegree.ogcwebservices.wfs.operation.GetFeature;
064    import org.deegree.ogcwebservices.wms.capabilities.Layer;
065    import org.deegree.ogcwebservices.wms.configuration.AbstractDataSource;
066    import org.w3c.dom.Element;
067    
068    /**
069     * This a copy of the WMS package.
070     *
071     * class for accessing the data of one user layer and creating <tt>DisplayElement</tt>s and a
072     * <tt>Thrme</tt> from it. The class extends <tt>Thread</tt> and implements the run method, so
073     * that a parallel data accessing from several layers is possible.
074     *
075     * @version $Revision: 22069 $
076     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
077     * @author last edited by: $Author: apoth $
078     *
079     * @version 1.0. $Revision: 22069 $, $Date: 2010-01-21 09:36:26 +0100 (Do, 21 Jan 2010) $
080     *
081     * @since 2.0
082     */
083    class GetMapServiceInvokerForUL extends Thread {
084    
085        private static final ILogger LOG = LoggerFactory.getLogger( GetMapServiceInvokerForUL.class );
086    
087        private final DefaultGetMapHandler handler;
088    
089        private UserLayer layer = null;
090    
091        private UserStyle[] styles = null;
092    
093        private int index = 0;
094    
095        GetMapServiceInvokerForUL( DefaultGetMapHandler handler, UserLayer layer, int index ) {
096            this.layer = layer;
097            this.handler = handler;
098            AbstractStyle[] tmp = layer.getStyles();
099            this.styles = new UserStyle[tmp.length];
100            for ( int i = 0; i < tmp.length; i++ ) {
101                this.styles[i] = (UserStyle) tmp[i];
102            }
103    
104            this.index = index;
105        }
106    
107        /**
108         * overrides/implements the run-method of <tt>Thread</tt>
109         */
110        @Override
111        public void run() {
112    
113            try {
114                if ( this.layer.getRemoteOWS() == null || this.layer.getRemoteOWS().getService().equals( RemoteOWS.WFS ) ) {
115                    handleWFS();
116                } else if ( this.layer.getRemoteOWS().getService().equals( RemoteOWS.WCS ) ) {
117                    handleWCS();
118                }
119            } catch ( Exception e ) {
120                LOG.logError( "", e );
121                OGCWebServiceException exce = new OGCWebServiceException(
122                                                                          "ServiceInvokerForUL: " + this.layer.getName(),
123                                                                          "Couldn't perform query!"
124                                                                                                  + StringTools.stackTraceToString( e ) );
125                this.handler.putTheme( this.index, exce );
126                this.handler.increaseCounter();
127    
128                return;
129            }
130    
131        }
132    
133        /**
134         * handles requests against a WFS
135         *
136         * @throws Exception
137         */
138        private void handleWFS()
139                                throws Exception {
140    
141            FeatureCollection fc = null;
142            String request = createGetFeatureRequest();
143    
144            if ( this.layer.getRemoteOWS() != null ) {
145                // handle request against a remote WFS
146                RemoteOWS remoteOWS = this.layer.getRemoteOWS();
147                URL url = remoteOWS.getOnlineResource();
148                NetWorker nw = new NetWorker( CharsetUtils.getSystemCharset(), url, request );
149                InputStreamReader isr = new InputStreamReader( nw.getInputStream(), CharsetUtils.getSystemCharset() );
150                GMLFeatureCollectionDocument doc = new GMLFeatureCollectionDocument();
151                doc.load( isr, url.toString() );
152                Element root = doc.getRootElement();
153    
154                if ( root.getNodeName().indexOf( "Exception" ) > -1 ) {
155                    ByteArrayOutputStream bos = new ByteArrayOutputStream( 1000 );
156                    doc.write( bos );
157                    throw new Exception( new String( bos.toByteArray() ) );
158                }
159                fc = doc.parse();
160            } else {
161                // handle request agaist a local WFS; this is bit problematic
162                // because deegree WMS is able to handle more than one
163                // local WFS. At the moment the WFS will be used that will
164                // returned by the WFServiceFactory as default
165                XMLFragment xml = new XMLFragment( new StringReader( request ), XMLFragment.DEFAULT_URL );
166                Element root = xml.getRootElement();
167                // create OGCWebServiceEvent object
168                IDGenerator idg = IDGenerator.getInstance();
169                GetFeature gfr = GetFeature.create( "" + idg.generateUniqueID(), root );
170    
171                // returns the WFS responsible for handling current feature type
172                WFService wfs = getResponsibleService();
173                FeatureResult fr = (FeatureResult) wfs.doService( gfr );
174                fc = (FeatureCollection) fr.getResponse();
175            }
176            org.deegree.graphics.Layer fl = MapFactory.createFeatureLayer( this.layer.getName(), this.handler.reqCRS, fc );
177            this.handler.putTheme( this.index, MapFactory.createTheme( this.layer.getName(), fl, this.styles ) );
178            this.handler.increaseCounter();
179    
180        }
181    
182        /**
183         * Returns the responsible service.
184         *
185         * @return Exception
186         * @throws OGCWebServiceException
187         */
188        private WFService getResponsibleService()
189                                throws OGCWebServiceException {
190    
191            LayerFeatureConstraints lfc = this.layer.getLayerFeatureConstraints();
192            FeatureTypeConstraint[] ftc = lfc.getFeatureTypeConstraint();
193            Layer root = this.handler.getConfiguration().getLayer();
194            WFService wfs = findService( root, ftc[0].getFeatureTypeName().getPrefixedName() );
195            if ( wfs == null ) {
196                throw new OGCWebServiceException( this.getName(), "feature type: " + ftc[0].getFeatureTypeName()
197                                                                  + " is not serverd by this WMS/WFS" );
198            }
199            return wfs;
200    
201        }
202    
203        /**
204         * searches/findes the WFService that is resposible for handling the feature types of the
205         * current request. If no WFService instance can be found <code>null</code> will be returned
206         * to indicated that the current feature type is not served by the internal WFS of a WMS
207         *
208         * @param currentlayer
209         * @param featureType
210         * @return WFService
211         * @throws OGCWebServiceException
212         */
213        private WFService findService( Layer currentlayer, String featureType )
214                                throws OGCWebServiceException {
215            Layer[] layers = currentlayer.getLayer();
216            for ( int i = 0; i < layers.length; i++ ) {
217                AbstractDataSource[] ad = layers[i].getDataSource();
218                if ( ad != null ) {
219                    for ( int j = 0; j < ad.length; j++ ) {
220                        if ( ad[j].getName().getPrefixedName().equals( featureType ) ) {
221                            return (WFService) ad[j].getOGCWebService();
222                        }
223                    }
224                }
225                // recursion
226                WFService wfs = findService( layers[i], featureType );
227                if ( wfs != null ) {
228                    return wfs;
229                }
230            }
231    
232            return null;
233        }
234    
235        /**
236         * creates a GetFeature request related to the UserLayer encapsulated in this object
237         *
238         * @return String
239         * @throws Exception
240         */
241        private String createGetFeatureRequest()
242                                throws Exception {
243    
244            LayerFeatureConstraints lfc = this.layer.getLayerFeatureConstraints();
245            FeatureTypeConstraint[] ftc = lfc.getFeatureTypeConstraint();
246    
247            // no filter condition has been defined
248            StringBuffer sb = new StringBuffer( 5000 );
249            sb.append( "<?xml version='1.0' encoding='UTF-8'?>" );
250            sb.append( "<GetFeature xmlns='http://www.opengis.net/wfs' " );
251            sb.append( "xmlns:ogc='http://www.opengis.net/ogc' " );
252            sb.append( "xmlns:gml='http://www.opengis.net/gml' " );
253            sb.append( "xmlns:app=\"http://www.deegree.org/app\" " );
254            sb.append( "service='WFS' version='1.1.0' " );
255            sb.append( "outputFormat='text/xml; subtype=gml/3.1.1'>" );
256            for ( int i = 0; i < ftc.length; i++ ) {
257                sb.append( "<Query typeName='" + ftc[i].getFeatureTypeName() + "'>" );
258                Filter filter = ftc[i].getFilter();
259                if ( filter != null ) {
260                    sb.append( filter.to110XML() );
261                }
262                sb.append( "</Query>" );
263            }
264            sb.append( "</GetFeature>" );
265    
266            return sb.toString();
267        }
268    
269        /**
270         * handles requests against a WCS
271         *
272         * @throws Exception
273         */
274        private void handleWCS()
275                                throws Exception {
276            throw new UnsupportedOperationException( "The WCS support has not been implemented as of now. "
277                                                     + "Please bear with us." );
278            /*
279             * TODO RemoteOWS remoteOWS = layer.getRemoteOWS(); URL url = remoteOWS.getOnlineResource();
280             *
281             * NetWorker nw = new NetWorker( url ); MemoryCacheSeekableStream mcss = new
282             * MemoryCacheSeekableStream( nw.getInputStream() );
283             *
284             * RenderedOp rop = JAI.create("stream", mcss);
285             *
286             * GC_GridCoverage gc = new ImageGridCoverage(rop.getAsBufferedImage(),
287             * request.getBoundingBox(), reqCRS, false); mcss.close();
288             *
289             * org.deegree.graphics.Layer rl = MapFactory.createRasterLayer(layer.getName(), gc);
290             *
291             * putTheme(index, MapFactory.createTheme(layer.getName(), rl)); mcss.close();
292             * increaseCounter();
293             */
294    
295        }
296    }