    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_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    }