001 // $HeadURL: /cvsroot/deegree/src/org/deegree/ogcwebservices/wms/WMService.java,v
002 // 1.3 2004/07/12 06:12:11 ap Exp $
003 /*----------------------------------------------------------------------------
004 This file is part of deegree, http://deegree.org/
005 Copyright (C) 2001-2009 by:
006 Department of Geography, University of Bonn
007 and
008 lat/lon GmbH
009
010 This library is free software; you can redistribute it and/or modify it under
011 the terms of the GNU Lesser General Public License as published by the Free
012 Software Foundation; either version 2.1 of the License, or (at your option)
013 any later version.
014 This library is distributed in the hope that it will be useful, but WITHOUT
015 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
016 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
017 details.
018 You should have received a copy of the GNU Lesser General Public License
019 along with this library; if not, write to the Free Software Foundation, Inc.,
020 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
021
022 Contact information:
023
024 lat/lon GmbH
025 Aennchenstr. 19, 53177 Bonn
026 Germany
027 http://lat-lon.de/
028
029 Department of Geography, University of Bonn
030 Prof. Dr. Klaus Greve
031 Postfach 1147, 53001 Bonn
032 Germany
033 http://www.geographie.uni-bonn.de/deegree/
034
035 e-mail: info@deegree.org
036 ----------------------------------------------------------------------------*/
037 package org.deegree.ogcwebservices.wms;
038
039 import java.lang.reflect.Constructor;
040 import java.lang.reflect.InvocationTargetException;
041
042 import org.deegree.enterprise.Proxy;
043 import org.deegree.framework.log.ILogger;
044 import org.deegree.framework.log.LoggerFactory;
045 import org.deegree.framework.trigger.TriggerProvider;
046 import org.deegree.ogcwebservices.CurrentUpdateSequenceException;
047 import org.deegree.ogcwebservices.InvalidUpdateSequenceException;
048 import org.deegree.ogcwebservices.OGCWebService;
049 import org.deegree.ogcwebservices.OGCWebServiceException;
050 import org.deegree.ogcwebservices.OGCWebServiceRequest;
051 import org.deegree.ogcwebservices.OGCWebServiceResponse;
052 import org.deegree.ogcwebservices.getcapabilities.OGCCapabilities;
053 import org.deegree.ogcwebservices.wms.configuration.WMSConfigurationType;
054 import org.deegree.ogcwebservices.wms.operation.DescribeLayer;
055 import org.deegree.ogcwebservices.wms.operation.GetFeatureInfo;
056 import org.deegree.ogcwebservices.wms.operation.GetLegendGraphic;
057 import org.deegree.ogcwebservices.wms.operation.GetLegendGraphicResult;
058 import org.deegree.ogcwebservices.wms.operation.GetMap;
059 import org.deegree.ogcwebservices.wms.operation.GetStyles;
060 import org.deegree.ogcwebservices.wms.operation.GetStylesResult;
061 import org.deegree.ogcwebservices.wms.operation.PutStyles;
062 import org.deegree.ogcwebservices.wms.operation.WMSGetCapabilities;
063 import org.deegree.ogcwebservices.wms.operation.WMSGetCapabilitiesResult;
064 import org.deegree.ogcwebservices.wms.operation.WMSProtocolFactory;
065
066 /**
067 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
068 * @author last edited by: $Author: mschneider $
069 *
070 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
071 *
072 * @since 1.1
073 *
074 */
075
076 public class WMService implements OGCWebService {
077
078 private static final ILogger LOG = LoggerFactory.getLogger( WMService.class );
079
080 private static final TriggerProvider TP = TriggerProvider.create( WMService.class );
081
082 private WMSConfigurationType configuration = null;
083
084 /**
085 * Creates a new WMService object.
086 *
087 * @param configuration
088 */
089 public WMService( WMSConfigurationType configuration ) {
090 this.configuration = configuration;
091 Proxy proxy = configuration.getDeegreeParams().getProxy();
092 if ( proxy != null ) {
093 proxy.setProxy( true );
094 }
095 }
096
097 /**
098 *
099 */
100 public OGCCapabilities getCapabilities() {
101 // should a class implement the WMSConfigurationType and not be an instance
102 // of OGCCapabilities, here's where it'll fail ;-)
103 return (OGCCapabilities) configuration;
104 }
105
106 /**
107 * the method performs the handling of the passed OGCWebServiceEvent directly and returns the result to the calling
108 * class/method
109 *
110 * @param request
111 * request to perform
112 *
113 * @throws OGCWebServiceException
114 */
115 public Object doService( OGCWebServiceRequest request )
116 throws OGCWebServiceException {
117
118 request = (OGCWebServiceRequest) TP.doPreTrigger( this, request )[0];
119
120 LOG.logDebug( "Handling WMS request with ID ", request.getId() );
121
122 Object result = null;
123 if ( request instanceof GetMap ) {
124 GetMapHandler gmh = (GetMapHandler) createHandler( request, GetMap.class,
125 HandlerMapping.getString( "WMService.GETMAP" ) );
126 result = gmh.performGetMap();
127 } else if ( request instanceof GetFeatureInfo ) {
128 GetFeatureInfoHandler gmh = (GetFeatureInfoHandler) createHandler(
129 request,
130 GetFeatureInfo.class,
131 HandlerMapping.getString( "WMService.GETFEATUREINFO" ) );
132 result = gmh.performGetFeatureInfo();
133 } else if ( request instanceof WMSGetCapabilities ) {
134 result = handleGetCapabilities( (WMSGetCapabilities) request );
135 } else if ( request instanceof GetStyles ) {
136 handleGetStyles( (GetStyles) request );
137 } else if ( request instanceof PutStyles ) {
138 handlePutStyles( (PutStyles) request );
139 } else if ( request instanceof DescribeLayer ) {
140 result = new DescribeLayerHandler().perform( (DescribeLayer) request, configuration );
141 } else if ( request instanceof GetLegendGraphic ) {
142 result = handleGetLegendGraphic( (GetLegendGraphic) request );
143 }
144
145 LOG.logDebug( "Handled WMS request with ID ", request.getId() );
146
147 return TP.doPostTrigger( this, result )[0];
148 }
149
150 /**
151 * creates a handler class for performing the incomming request. The instance that will be created depends on the
152 * responsible class the for the submitted request in the WMS capabilities/configuration.
153 *
154 * @param request
155 * request to be performed
156 * @param requestClass
157 * of the request (GetStyles, WMSFeatureInfoRequest etc.)
158 */
159 private Object createHandler( OGCWebServiceRequest request, Class<?> requestClass, String className )
160 throws OGCWebServiceException {
161 // describes the signature of the required constructor
162 Class<?>[] cl = new Class[2];
163 cl[0] = WMSConfigurationType.class;
164 cl[1] = requestClass;
165
166 // set parameter to submitt to the constructor
167 Object[] o = new Object[2];
168 o[0] = configuration;
169 o[1] = request;
170
171 Object handler = null;
172
173 try {
174 // get constructor
175 Class<?> creator = Class.forName( className );
176 Constructor<?> con = creator.getConstructor( cl );
177
178 // call constructor and instantiate a new DataStore
179 handler = con.newInstance( o );
180 } catch ( ClassNotFoundException cce ) {
181 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + cce.toString() );
182 } catch ( NoSuchMethodException nsme ) {
183 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + nsme.toString() );
184 } catch ( InstantiationException ie ) {
185 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + ie.toString() );
186 } catch ( IllegalAccessException iae ) {
187 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + iae.toString() );
188 } catch ( InvocationTargetException ite ) {
189 // causes need not be OGCWebService exceptions
190 Throwable cause = ite.getCause();
191 if ( cause instanceof OGCWebServiceException ) {
192 throw (OGCWebServiceException) cause;
193 }
194 LOG.logError( "Unknown error", cause );
195 throw new OGCWebServiceException( getClass().getName(), cause.getMessage() );
196 } catch ( Exception e ) {
197 throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + e.toString() );
198 }
199
200 return handler;
201 }
202
203 /**
204 * reads/creates the capabilities of the WMS.
205 *
206 * @param request
207 * capabilities request
208 */
209 private WMSGetCapabilitiesResult handleGetCapabilities( WMSGetCapabilities request )
210 throws OGCWebServiceException {
211
212 String rUp = request.getUpdateSequence();
213 String cUp = configuration.getUpdateSequence();
214
215 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) == 0 ) ) {
216 throw new CurrentUpdateSequenceException( "request update sequence (" + rUp + ") is equal to capabilities"
217 + " update sequence " + cUp );
218 }
219
220 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) > 0 ) ) {
221 throw new InvalidUpdateSequenceException( "request update sequence: " + rUp + " is higher than the "
222 + "capabilities update sequence " + cUp );
223 }
224
225 WMSGetCapabilitiesResult res = null;
226 res = WMSProtocolFactory.createGetCapabilitiesResponse( request, null, configuration );
227
228 return res;
229 }
230
231 /**
232 * @param request
233 * get styles request (WMS 1.1.1 - SLD)
234 */
235 private GetStylesResult handleGetStyles( GetStyles request ) {
236 throw new UnsupportedOperationException( "handleGetStyles(" + request.getClass().getSimpleName()
237 + ") not implemented" );
238 }
239
240 /**
241 * @param request
242 * put styles request (WMS 1.1.1 - SLD)
243 */
244 private void handlePutStyles( PutStyles request ) {
245 throw new UnsupportedOperationException( "handlePutStyles(" + request.getClass().getSimpleName()
246 + ") not implemented" );
247 }
248
249 /**
250 * @param request
251 *
252 * @return the response
253 * @throws OGCWebServiceException
254 */
255 private OGCWebServiceResponse handleGetLegendGraphic( GetLegendGraphic request )
256 throws OGCWebServiceException {
257 OGCWebServiceResponse result;
258
259 Object o = createHandler( request, GetLegendGraphic.class,
260 HandlerMapping.getString( "WMService.GETLEGENDGRAPHIC" ) );
261
262 GetLegendGraphicHandler glgh = (GetLegendGraphicHandler) o;
263 result = glgh.performGetLegendGraphic();
264 if ( ( (GetLegendGraphicResult) result ).getLegendGraphic() != null ) {
265 // cache.push(request, ((GetLegendGraphicResult) result).getLegendGraphic());
266 }
267
268 return result;
269 }
270
271 }