001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/enterprise/servlet/WPSHandler.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.enterprise.servlet;
037
038 import java.io.IOException;
039
040 import javax.servlet.http.HttpServletResponse;
041
042 import org.deegree.enterprise.ServiceException;
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.model.feature.FeatureCollection;
047 import org.deegree.model.feature.GMLFeatureAdapter;
048 import org.deegree.ogcbase.ExceptionCode;
049 import org.deegree.ogcwebservices.OGCWebServiceException;
050 import org.deegree.ogcwebservices.OGCWebServiceRequest;
051 import org.deegree.ogcwebservices.wps.WPService;
052 import org.deegree.ogcwebservices.wps.WPServiceFactory;
053 import org.deegree.ogcwebservices.wps.XMLFactory;
054 import org.deegree.ogcwebservices.wps.capabilities.WPSCapabilities;
055 import org.deegree.ogcwebservices.wps.capabilities.WPSCapabilitiesDocument;
056 import org.deegree.ogcwebservices.wps.configuration.WPSConfiguration;
057 import org.deegree.ogcwebservices.wps.describeprocess.ProcessDescriptions;
058 import org.deegree.ogcwebservices.wps.describeprocess.ProcessDescriptionsDocument;
059 import org.deegree.ogcwebservices.wps.execute.ComplexValue;
060 import org.deegree.ogcwebservices.wps.execute.ExecuteResponse;
061 import org.deegree.ogcwebservices.wps.execute.ExecuteResponseDocument;
062
063 /**
064 * WPSHandler.java
065 *
066 * Created on 08.03.2006. 17:01:31h
067 *
068 * @author <a href="mailto:kiehle@giub.uni-bonn.de">Christian Kiehle</a>
069 * @author <a href="mailto:che@wupperverband.de">Christian Heier</a>
070 *
071 * @version 1.0.
072 *
073 * @since 2.0
074 */
075 public class WPSHandler extends AbstractOWServiceHandler implements ServiceDispatcher {
076
077 private static final ILogger LOG = LoggerFactory.getLogger( WPSHandler.class );
078
079 /**
080 *
081 */
082 public void perform( OGCWebServiceRequest request, HttpServletResponse httpServletResponse )
083 throws ServiceException, OGCWebServiceException {
084
085 WPService service = WPServiceFactory.getInstance();
086 @SuppressWarnings("unused")
087 WPSConfiguration config = (WPSConfiguration) service.getCapabilities();
088 Object response = service.doService( request );
089 if ( response instanceof WPSCapabilities ) {
090 sendGetCapabilitiesResponse( httpServletResponse, (WPSCapabilities) response );
091 } else if ( response instanceof ProcessDescriptions ) {
092 sendDescribeProcessResponse( httpServletResponse, (ProcessDescriptions) response );
093 } else if ( response instanceof ExecuteResponse ) {
094 sendExecuteResponse( httpServletResponse, (ExecuteResponse) response );
095 }
096
097 }
098
099 /**
100 * Sends the response to a GetCapabilities request to the client.
101 *
102 * @param httpResponse
103 * @param capabilities
104 */
105 private void sendGetCapabilitiesResponse( HttpServletResponse httpResponse, WPSCapabilities capabilities ) {
106 try {
107 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
108 WPSCapabilitiesDocument document = XMLFactory.export( capabilities );
109 document.write( httpResponse.getOutputStream() );
110 } catch ( IOException e ) {
111 LOG.logError( "Error sending GetCapabilities response.", e );
112 }
113 }
114
115 /**
116 * Sends the response to a DescribeProcess request to the client.
117 *
118 * @param httpResponse
119 * @param processDescriptions
120 */
121 private void sendDescribeProcessResponse( HttpServletResponse httpResponse, ProcessDescriptions processDescriptions ) {
122 try {
123 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
124 ProcessDescriptionsDocument document = XMLFactory.export( processDescriptions );
125 document.write( httpResponse.getOutputStream() );
126 } catch ( IOException e ) {
127 LOG.logError( "Error sending DescribeProcess response.", e );
128 }
129 }
130
131 /**
132 * Sends the response to an Execute request to the client.
133 *
134 * @param httpResponse
135 * @param executeResponse
136 * @throws OGCWebServiceException
137 * if an exception occurs which can be propagated to the client
138 */
139 private void sendExecuteResponse( HttpServletResponse httpResponse, ExecuteResponse executeResponse )
140 throws OGCWebServiceException {
141
142 /*
143 * @see OGC 05-007r4 Subclauses 10.3.1 and 10.3.2
144 * @see OGC 05-007r4 Tables 43, 44
145 * @see OGC 05-007r4 Table 27: If the storeparameter is false, process execution was
146 * successful, there is only one output, and that output has a ComplexValue, then this
147 * ComplexValue shall be returned to the client outside of any ExecuteResponse
148 * document.
149 */
150 String processSucceeded = executeResponse.getStatus().getProcessSucceeded();
151
152 if ( null != processSucceeded && executeResponse.isDirectResponse() ) {
153
154 ComplexValue complexValue = executeResponse.getProcessOutputs().getOutputs().get( 0 ).getComplexValue();
155
156 if ( null != complexValue ) {
157 sendDirectResponse( httpResponse, complexValue );
158 }
159
160 } else {
161 try {
162 httpResponse.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
163 ExecuteResponseDocument document = XMLFactory.export( executeResponse );
164 document.write( httpResponse.getOutputStream() );
165 } catch ( IOException e ) {
166 LOG.logError( "error sending execute response.", e );
167 }
168 }
169 }
170
171 /**
172 * Writes the passed <code>ComplexValue</code> to the <code>HTTPServletResponse</code>
173 *
174 * @param httpResponse
175 * @param complexValue
176 */
177 private static void sendDirectResponse( HttpServletResponse httpResponse, ComplexValue complexValue )
178 throws OGCWebServiceException {
179
180 Object content = complexValue.getContent();
181
182 if ( content instanceof FeatureCollection ) {
183
184 LOG.logInfo( "content is instance of featurecollection" );
185
186 FeatureCollection fc = (FeatureCollection) content;
187
188 GMLFeatureAdapter gmlFeatureAdapter = new GMLFeatureAdapter();
189
190 try {
191 gmlFeatureAdapter.export( fc, httpResponse.getOutputStream() );
192 } catch ( Exception e ) {
193 String msg = "Error sending direct execute response.";
194 LOG.logError( msg, e );
195 throw new OGCWebServiceException( "", msg, ExceptionCode.NOAPPLICABLECODE );
196 }
197 } else {
198 // TODO implement direct output methods for complexvalue types other
199 // than
200 // featurecollection
201 }
202 }
203 }