001 // $HeadURL: /cvsroot/deegree/src/org/deegree/ogcwebservices/wms/WMService.java,v
002 // 1.3 2004/07/12 06:12:11 ap Exp $
003 /*---------------- FILE HEADER ------------------------------------------
004
005 This file is part of deegree.
006 Copyright (C) 2001-2006 by:
007 EXSE, Department of Geography, University of Bonn
008 http://www.giub.uni-bonn.de/deegree/
009 lat/lon GmbH
010 http://www.lat-lon.de
011
012 This library is free software; you can redistribute it and/or
013 modify it under the terms of the GNU Lesser General Public
014 License as published by the Free Software Foundation; either
015 version 2.1 of the License, or (at your option) any later version.
016
017 This library is distributed in the hope that it will be useful,
018 but WITHOUT ANY WARRANTY; without even the implied warranty of
019 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
020 Lesser General Public License for more details.
021
022 You should have received a copy of the GNU Lesser General Public
023 License along with this library; if not, write to the Free Software
024 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
025
026 Contact:
027
028 Andreas Poth
029 lat/lon GmbH
030 Aennchenstr. 19
031 53115 Bonn
032 Germany
033 E-Mail: poth@lat-lon.de
034
035 Prof. Dr. Klaus Greve
036 Department of Geography
037 University of Bonn
038 Meckenheimer Allee 166
039 53115 Bonn
040 Germany
041 E-Mail: greve@giub.uni-bonn.de
042
043
044 ---------------------------------------------------------------------------*/
045 package org.deegree.ogcwebservices.wms;
046
047 import java.lang.reflect.Constructor;
048 import java.lang.reflect.InvocationTargetException;
049
050 import org.deegree.enterprise.Proxy;
051 import org.deegree.framework.log.ILogger;
052 import org.deegree.framework.log.LoggerFactory;
053 import org.deegree.framework.trigger.TriggerProvider;
054 import org.deegree.ogcwebservices.CurrentUpdateSequenceException;
055 import org.deegree.ogcwebservices.InvalidUpdateSequenceException;
056 import org.deegree.ogcwebservices.OGCWebService;
057 import org.deegree.ogcwebservices.OGCWebServiceException;
058 import org.deegree.ogcwebservices.OGCWebServiceRequest;
059 import org.deegree.ogcwebservices.OGCWebServiceResponse;
060 import org.deegree.ogcwebservices.getcapabilities.OGCCapabilities;
061 import org.deegree.ogcwebservices.wms.configuration.WMSConfigurationType;
062 import org.deegree.ogcwebservices.wms.operation.DescribeLayer;
063 import org.deegree.ogcwebservices.wms.operation.GetFeatureInfo;
064 import org.deegree.ogcwebservices.wms.operation.GetLegendGraphic;
065 import org.deegree.ogcwebservices.wms.operation.GetLegendGraphicResult;
066 import org.deegree.ogcwebservices.wms.operation.GetMap;
067 import org.deegree.ogcwebservices.wms.operation.GetStyles;
068 import org.deegree.ogcwebservices.wms.operation.GetStylesResult;
069 import org.deegree.ogcwebservices.wms.operation.PutStyles;
070 import org.deegree.ogcwebservices.wms.operation.WMSGetCapabilities;
071 import org.deegree.ogcwebservices.wms.operation.WMSGetCapabilitiesResult;
072 import org.deegree.ogcwebservices.wms.operation.WMSProtocolFactory;
073
074 /**
075 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
076 * @author last edited by: $Author: aschmitz $
077 *
078 * @version 1.0. $Revision: 6891 $, $Date: 2007-05-08 14:02:55 +0200 (Di, 08 Mai 2007) $
079 *
080 * @since 1.1
081 *
082 */
083
084 public class WMService implements OGCWebService {
085
086 private static final ILogger LOG = LoggerFactory.getLogger( WMService.class );
087 private static final TriggerProvider TP = TriggerProvider.create( WMService.class );
088
089 private WMSConfigurationType configuration = null;
090
091 /**
092 * Creates a new WMService object.
093 *
094 * @param configuration
095 */
096 public WMService( WMSConfigurationType configuration ) {
097 this.configuration = configuration;
098 Proxy proxy = configuration.getDeegreeParams().getProxy();
099 if ( proxy != null ) {
100 proxy.setProxy( true );
101 }
102 }
103
104 /**
105 *
106 */
107 public OGCCapabilities getCapabilities() {
108 // should a class implement the WMSConfigurationType and not be an instance
109 // of OGCCapabilities, here's where it'll fail ;-)
110 return (OGCCapabilities) configuration;
111 }
112
113 /**
114 * the method performs the handling of the passed OGCWebServiceEvent
115 * directly and returns the result to the calling class/method
116 *
117 * @param request request to perform
118 *
119 * @throws OGCWebServiceException
120 */
121 public Object doService( OGCWebServiceRequest request )
122 throws OGCWebServiceException {
123
124 request = (OGCWebServiceRequest)TP.doPreTrigger( this, request )[0];
125
126 Object result = null;
127 if ( request instanceof GetMap ) {
128 GetMapHandler gmh = (GetMapHandler) createHandler( request, GetMap.class,
129 HandlerMapping.getString( "WMService.GETMAP" ) );
130 result = gmh.performGetMap();
131 } else if ( request instanceof GetFeatureInfo ) {
132 GetFeatureInfoHandler gmh = (GetFeatureInfoHandler) createHandler( request,
133 GetFeatureInfo.class,
134 HandlerMapping.getString( "WMService.GETFEATUREINFO" ) );
135 result = gmh.performGetFeatureInfo();
136 } else if ( request instanceof WMSGetCapabilities ) {
137 result = handleGetCapabilities( (WMSGetCapabilities) request );
138 } else if ( request instanceof GetStyles ) {
139 handleGetStyles( (GetStyles) request );
140 } else if ( request instanceof PutStyles ) {
141 handlePutStyles( (PutStyles) request );
142 } else if ( request instanceof DescribeLayer ) {
143 handleDescribeLayer( (DescribeLayer) request );
144 } else if ( request instanceof GetLegendGraphic ) {
145 result = handleGetLegendGraphic( (GetLegendGraphic) request );
146 }
147
148 return TP.doPostTrigger( this, result )[0];
149 }
150
151 /**
152 * creates a handler class for performing the incomming request. The
153 * instance that will be created depends on the responsible class the for
154 * the submitted request in the WMS capabilities/configuration.
155 *
156 * @param request
157 * request to be performed
158 * @param requestClass
159 * of the request (GetStyles, WMSFeatureInfoRequest etc.)
160 * @param operationType
161 * type of the operation to perform by the handler
162 */
163 private Object createHandler( OGCWebServiceRequest request, Class<?> requestClass, String className )
164 throws OGCWebServiceException {
165 LOG.entering();
166
167 // describes the signature of the required constructor
168 Class[] cl = new Class[2];
169 cl[0] = WMSConfigurationType.class;
170 cl[1] = requestClass;
171
172 // set parameter to submitt to the constructor
173 Object[] o = new Object[2];
174 o[0] = configuration;
175 o[1] = request;
176
177 Object handler = null;
178
179 try {
180 // get constructor
181 Class<?> creator = Class.forName( className );
182 Constructor<?> con = creator.getConstructor( cl );
183
184 // call constructor and instantiate a new DataStore
185 handler = con.newInstance( o );
186 } catch ( ClassNotFoundException cce ) {
187 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n"
188 + cce.toString() );
189 } catch ( NoSuchMethodException nsme ) {
190 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n"
191 + nsme.toString() );
192 } catch ( InstantiationException ie ) {
193 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n"
194 + ie.toString() );
195 } catch ( IllegalAccessException iae ) {
196 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n"
197 + iae.toString() );
198 } catch ( InvocationTargetException ite ) {
199 // Seems that this does not actually work. Thrown exceptions just get lost.
200 throw (OGCWebServiceException) ite.getCause();
201 } catch ( Exception e ) {
202 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n"
203 + e.toString() );
204 }
205
206 LOG.exiting();
207
208 return handler;
209 }
210
211 /**
212 * reads/creates the capabilities of the WMS.
213 *
214 * @param request
215 * capabilities request
216 */
217 private WMSGetCapabilitiesResult handleGetCapabilities( WMSGetCapabilities request )
218 throws OGCWebServiceException {
219 LOG.entering();
220
221 String rUp = request.getUpdateSequence();
222 String cUp = configuration.getUpdateSequence();
223
224 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) == 0 ) ) {
225 throw new CurrentUpdateSequenceException( "request update sequence (" + rUp
226 + ") is equal to capabilities"
227 + " update sequence " + cUp );
228 }
229
230 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) > 0 ) ) {
231 throw new InvalidUpdateSequenceException( "request update sequence: " + rUp
232 + " is higher than the "
233 + "capabilities update sequence " + cUp );
234 }
235
236 WMSGetCapabilitiesResult res = null;
237 res = WMSProtocolFactory.createGetCapabilitiesResponse( request, null, configuration );
238
239 LOG.exiting();
240 return res;
241 }
242
243 /**
244 * @param request
245 * get styles request (WMS 1.1.1 - SLD)
246 */
247 private GetStylesResult handleGetStyles( GetStyles request ) {
248 throw new UnsupportedOperationException( "handleGetStyles(GetStyles) not implemented" );
249 }
250
251 /**
252 * @param request
253 * put styles request (WMS 1.1.1 - SLD)
254 */
255 private void handlePutStyles( PutStyles request ) {
256 throw new UnsupportedOperationException( "handlePutStyles(GetStyles) not implemented" );
257 }
258
259 /**
260 * @param request
261 * describe layer request (WMS 1.1.1 - SLD)
262 */
263 private void handleDescribeLayer( DescribeLayer request ) {
264 throw new UnsupportedOperationException( "handleDescribeLayer(GetStyles) not implemented" );
265 }
266
267 /**
268 * @param request
269 *
270 * @return the response
271 * @throws WebServiceException
272 */
273 private OGCWebServiceResponse handleGetLegendGraphic( GetLegendGraphic request )
274 throws OGCWebServiceException {
275
276 LOG.entering();
277
278 OGCWebServiceResponse result = null;
279
280 if ( result == null ) {
281 GetLegendGraphicHandler glgh = (GetLegendGraphicHandler) createHandler(
282 request,
283 GetLegendGraphic.class,
284 HandlerMapping.getString( "WMService.GETLEGENDGRAPHIC" ) );
285 result = glgh.performGetLegendGraphic();
286 if ( ( (GetLegendGraphicResult) result ).getLegendGraphic() != null ) {
287 //cache.push(request, ((GetLegendGraphicResult) result).getLegendGraphic());
288 }
289 }
290
291 LOG.exiting();
292 return result;
293 }
294
295
296
297 }