001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/enterprise/servlet/WPSHandler.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2005 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/exse/
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 package org.deegree.enterprise.servlet;
044
045 import java.io.IOException;
046
047 import javax.servlet.http.HttpServletResponse;
048
049 import org.deegree.enterprise.ServiceException;
050 import org.deegree.framework.log.ILogger;
051 import org.deegree.framework.log.LoggerFactory;
052 import org.deegree.framework.util.CharsetUtils;
053 import org.deegree.model.feature.FeatureCollection;
054 import org.deegree.model.feature.GMLFeatureAdapter;
055 import org.deegree.ogcbase.ExceptionCode;
056 import org.deegree.ogcwebservices.OGCWebServiceException;
057 import org.deegree.ogcwebservices.OGCWebServiceRequest;
058 import org.deegree.ogcwebservices.wps.WPService;
059 import org.deegree.ogcwebservices.wps.WPServiceFactory;
060 import org.deegree.ogcwebservices.wps.XMLFactory;
061 import org.deegree.ogcwebservices.wps.capabilities.WPSCapabilities;
062 import org.deegree.ogcwebservices.wps.capabilities.WPSCapabilitiesDocument;
063 import org.deegree.ogcwebservices.wps.configuration.WPSConfiguration;
064 import org.deegree.ogcwebservices.wps.describeprocess.ProcessDescriptions;
065 import org.deegree.ogcwebservices.wps.describeprocess.ProcessDescriptionsDocument;
066 import org.deegree.ogcwebservices.wps.execute.ComplexValue;
067 import org.deegree.ogcwebservices.wps.execute.ExecuteResponse;
068 import org.deegree.ogcwebservices.wps.execute.ExecuteResponseDocument;
069
070 /**
071 * WPSHandler.java
072 *
073 * Created on 08.03.2006. 17:01:31h
074 *
075 * @author <a href="mailto:kiehle@giub.uni-bonn.de">Christian Kiehle</a>
076 * @author <a href="mailto:che@wupperverband.de">Christian Heier</a>
077 *
078 * @version 1.0.
079 *
080 * @since 2.0
081 */
082 public class WPSHandler extends AbstractOWServiceHandler implements ServiceDispatcher {
083
084 private static final ILogger LOG = LoggerFactory.getLogger( WPSHandler.class );
085
086 /**
087 *
088 */
089 public void perform( OGCWebServiceRequest request, HttpServletResponse httpServletResponse )
090 throws ServiceException, OGCWebServiceException {
091
092 WPService service = WPServiceFactory.getInstance();
093 @SuppressWarnings ( "unused")
094 WPSConfiguration config = ( WPSConfiguration ) service.getCapabilities();
095 Object response = service.doService( request );
096 if ( response instanceof WPSCapabilities ) {
097 sendGetCapabilitiesResponse( httpServletResponse, ( WPSCapabilities ) response );
098 } else if ( response instanceof ProcessDescriptions ) {
099 sendDescribeProcessResponse( httpServletResponse, ( ProcessDescriptions ) response );
100 } else if ( response instanceof ExecuteResponse ) {
101 sendExecuteResponse( httpServletResponse, ( ExecuteResponse ) response );
102 }
103
104 }
105
106 /**
107 * Sends the response to a GetCapabilities request to the client.
108 *
109 * @param httpResponse
110 * @param capabilities
111 * @throws OGCWebServiceException
112 * if an exception occurs which can be propagated to the client
113 */
114 private void sendGetCapabilitiesResponse( HttpServletResponse httpResponse,
115 WPSCapabilities capabilities ) {
116 try {
117 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
118 WPSCapabilitiesDocument document = XMLFactory.export( capabilities );
119 document.write( httpResponse.getOutputStream() );
120 } catch ( IOException e ) {
121 LOG.logError( "Error sending GetCapabilities response.", e );
122 }
123 }
124
125 /**
126 * Sends the response to a DescribeProcess request to the client.
127 *
128 * @param httpResponse
129 * @param capabilities
130 * @throws OGCWebServiceException
131 * if an exception occurs which can be propagated to the client
132 */
133 private void sendDescribeProcessResponse( HttpServletResponse httpResponse,
134 ProcessDescriptions processDescriptions ) {
135 try {
136 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
137 ProcessDescriptionsDocument document = XMLFactory.export( processDescriptions );
138 document.write( httpResponse.getOutputStream() );
139 } catch ( IOException e ) {
140 LOG.logError( "Error sending DescribeProcess response.", e );
141 }
142 }
143
144 /**
145 * Sends the response to an Execute request to the client.
146 *
147 * @param httpServletResponse
148 * @param request
149 * @throws OGCWebServiceException
150 * if an exception occurs which can be propagated to the client
151 */
152 private void sendExecuteResponse( HttpServletResponse httpResponse,
153 ExecuteResponse executeResponse ) throws OGCWebServiceException {
154
155 /*
156 * @see OGC 05-007r4 Subclauses 10.3.1 and 10.3.2
157 * @see OGC 05-007r4 Tables 43, 44
158 * @see OGC 05-007r4 Table 27: If the �store� parameter is �false�,
159 * process execution was successful, there is only one output, and
160 * that output has a ComplexValue, then this ComplexValue shall be
161 * returned to the client outside of any ExecuteResponse document.
162 */
163 String processSucceeded = executeResponse.getStatus().getProcessSucceeded();
164
165 if ( null != processSucceeded && executeResponse.isDirectResponse() ) {
166
167 ComplexValue complexValue = executeResponse.getProcessOutputs().getOutputs().get( 0 )
168 .getComplexValue();
169
170 if ( null != complexValue ) {
171 sendDirectResponse( httpResponse, complexValue );
172 }
173
174 } else {
175 try {
176 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
177 ExecuteResponseDocument document = XMLFactory.export( executeResponse );
178 document.write( httpResponse.getOutputStream() );
179 } catch ( IOException e ) {
180 LOG.logError( "error sending execute response.", e );
181 }
182 }
183 }
184
185 /**
186 * Writes the passed <code>ComplexValue</code> to the
187 * <code>HTTPServletResponse</code>
188 *
189 * @param httpResponse
190 * @param complexValue
191 */
192 private static void sendDirectResponse( HttpServletResponse httpResponse,
193 ComplexValue complexValue ) throws OGCWebServiceException {
194
195 Object content = complexValue.getContent();
196
197 if ( content instanceof FeatureCollection ) {
198
199 LOG.logInfo( "content is instance of featurecollection" );
200
201 FeatureCollection fc = ( FeatureCollection ) content;
202
203 GMLFeatureAdapter gmlFeatureAdapter = new GMLFeatureAdapter();
204
205 try {
206 gmlFeatureAdapter.export( fc, httpResponse.getOutputStream() );
207 } catch ( Exception e ) {
208 String msg = "Error sending direct execute response.";
209 LOG.logError( msg, e );
210 throw new OGCWebServiceException( "", msg, ExceptionCode.NOAPPLICABLECODE );
211 }
212 } else {
213 // TODO implement direct output methods for complexvalue types other
214 // than
215 // featurecollection
216 }
217 }
218 }
219 /* ********************************************************************
220 Changes to this class. What the people have been up to:
221 $Log$
222 Revision 1.10 2006/10/17 20:31:18 poth
223 *** empty log message ***
224
225 Revision 1.9 2006/08/24 06:39:04 poth
226 File header corrected
227
228 Revision 1.8 2006/07/23 10:05:54 poth
229 setting content type for Http responses enhanced by adding charset (for mime types text/plain and text/xml)
230
231 Revision 1.7 2006/07/12 14:46:15 poth
232 comment footer added
233
234 ********************************************************************** */