    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/enterprise/servlet/WMPSHandler.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
    037    package org.deegree.enterprise.servlet;
    038
    039    import java.io.PrintWriter;
    040
    041    import javax.servlet.http.HttpServletResponse;
    042
    043    import org.deegree.framework.log.ILogger;
    044    import org.deegree.framework.log.LoggerFactory;
    045    import org.deegree.framework.util.NetWorker;
    046    import org.deegree.framework.util.StringTools;
    047    import org.deegree.framework.xml.DOMPrinter;
    048    import org.deegree.framework.xml.XMLFragment;
    049    import org.deegree.ogcwebservices.OGCWebService;
    050    import org.deegree.ogcwebservices.OGCWebServiceException;
    051    import org.deegree.ogcwebservices.OGCWebServiceRequest;
    052    import org.deegree.ogcwebservices.OGCWebServiceResponse;
    053    import org.deegree.ogcwebservices.wmps.WMPService;
    054    import org.deegree.ogcwebservices.wmps.WMPServiceFactory;
    055    import org.deegree.ogcwebservices.wmps.XMLFactory;
    056    import org.deegree.ogcwebservices.wmps.capabilities.WMPSCapabilities;
    057    import org.deegree.ogcwebservices.wmps.capabilities.WMPSCapabilitiesDocument;
    058    import org.deegree.ogcwebservices.wmps.configuration.WMPSConfiguration;
    059    import org.deegree.ogcwebservices.wmps.operation.DescribeTemplateResponseDocument;
    060    import org.deegree.ogcwebservices.wmps.operation.GetAvailableTemplatesResponseDocument;
    061    import org.deegree.ogcwebservices.wmps.operation.PrintMapResponseDocument;
    062    import org.deegree.ogcwebservices.wmps.operation.WMPSGetCapabilitiesResult;
    063    import org.deegree.ogcwebservices.wms.InvalidFormatException;
    064
    065    /**
    066     *
    067     * Web servlet client for WMPS.
    068     *
    069     * @author <a href="mailto:deshmukh@lat-lon.de">Anup Deshmukh</a>
    070     *
    071     * @author last edited by: $Author: apoth $
    072     *
    073     * @version 2.0, $Revision: 21101 $, $Date: 2009-11-27 13:51:01 +0100 (Fr, 27. Nov 2009) $
    074     *
    075     * @since 2.0
    076     */
    077
    078    public class WMPSHandler extends AbstractOWServiceHandler {
    079
    080        private static ILogger LOG = LoggerFactory.getLogger( WMPSHandler.class );
    081
    082        private HttpServletResponse resp = null;
    083
    084        private WMPSConfiguration configuration = null;
    085
    086        /**
    087         * Create an empty WMPSHandler
    088         */
    089        WMPSHandler() {
    090            LOG.logDebug( "New WMPSHandler instance created: " + this.getClass().getName() );
    091        }
    092
    093        /**
    094         * performs the passed OGCWebServiceRequest by accessing service from the pool and passing the request to it
    095         */
    096        public void perform( OGCWebServiceRequest request, HttpServletResponse response )
    097                                throws OGCWebServiceException {
    098
    099            resp = response;
    100            OGCWebService service;
    101            try {
    102                service = WMPServiceFactory.getService();
    103            } catch ( Exception e ) {
    104                throw new OGCWebServiceException( "Error performing the WMPService(s)." );
    105            }
    106            configuration = (WMPSConfiguration) ( (WMPService) service ).getCapabilities();
    107            // if ( service == null ) {
    108            // OGCWebServiceException exce = new OGCWebServiceException( "WMPS:WMPS",
    109            // "could not access a WMPService instance" );
    110            // sendException( response, exce );
    111            // return;
    112            // }
    113            Object o = service.doService( request );
    114            handleResponse( o );
    115        }
    116
    117        /**
    118         *
    119         *
    120         * @param result
    121         */
    122        private void handleResponse( Object result ) {
    123
    124            try {
    125                OGCWebServiceResponse response = (OGCWebServiceResponse) result;
    126                if ( response.getException() != null ) {
    127                    // handle the case that an exception occured during the
    128                    // request performance
    129                    OGCWebServiceException exce = response.getException();
    130                    sendException( resp, exce );
    131                } else {
    132                    if ( response instanceof WMPSGetCapabilitiesResult ) {
    133                        handleGetCapabilitiesResponse( (WMPSGetCapabilitiesResult) response );
    134                    } else if ( response instanceof PrintMapResponseDocument ) {
    135                        handlePrintMapResponse( (PrintMapResponseDocument) response );
    136                    } else if ( response instanceof GetAvailableTemplatesResponseDocument ) {
    137                        handleGetAvailableTemplatesResponse( (GetAvailableTemplatesResponseDocument) response );
    138                    } else if ( response instanceof DescribeTemplateResponseDocument ) {
    139                        handleDescribeTemplateResponse( (DescribeTemplateResponseDocument) response );
    140                    }
    141                }
    142            } catch ( InvalidFormatException ife ) {
    143                LOG.logError( ife.getMessage(), ife );
    144                OGCWebServiceException exce = new OGCWebServiceException( "InvalidFormat", ife.getMessage() );
    145                sendException( resp, exce );
    146            } catch ( Exception e ) {
    147                LOG.logError( e.getMessage(), e );
    148                OGCWebServiceException exce = new OGCWebServiceException( "WMPS:write", e.getMessage() );
    149                sendException( resp, exce );
    150            }
    151
    152        }
    153
    154        /**
    155         * @param response
    156         */
    157        private void handleDescribeTemplateResponse( DescribeTemplateResponseDocument response ) {
    158            resp.setContentType( "application/vnd.ogc.wms_xml" );
    159
    160            XMLFragment xml = new XMLFragment( response.getRootElement() );
    161            try {
    162                PrintWriter pw = resp.getWriter();
    163                xml.prettyPrint( pw );
    164                pw.close();
    165            } catch ( Exception e ) {
    166                LOG.logError( "-", e );
    167            }
    168        }
    169
    170        /**
    171         * @param response
    172         */
    173        private void handleGetAvailableTemplatesResponse( GetAvailableTemplatesResponseDocument response ) {
    174            resp.setContentType( "application/vnd.ogc.wms_xml" );
    175
    176            XMLFragment xml = new XMLFragment( response.getRootElement() );
    177            try {
    178                PrintWriter pw = resp.getWriter();
    179                xml.prettyPrint( pw );
    180                pw.close();
    181            } catch ( Exception e ) {
    182                LOG.logError( "-", e );
    183            }
    184        }
    185
    186        /**
    187         * handles the response to a get capabilities request
    188         *
    189         * @param response
    190         */
    191        private void handleGetCapabilitiesResponse( WMPSGetCapabilitiesResult response )
    192                                throws Exception {
    193
    194            resp.setContentType( "application/vnd.ogc.wms_xml" );
    195            WMPSCapabilities capa = response.getCapabilities();
    196            WMPSCapabilitiesDocument doc = XMLFactory.export( capa );
    197
    198            // XMLFragment frag = doc.transform( url.openStream() , XMLFragment.DEFAULT_URL );
    199            String xml = DOMPrinter.nodeToString( doc.getRootElement(), "" );
    200
    201            String dtd = NetWorker.url2String( configuration.getDeegreeParams().getDTDLocation() );
    202            StringBuffer sb = new StringBuffer();
    203            sb.append( "<!DOCTYPE WMT_PS_Capabilities SYSTEM " );
    204            sb.append( "'" + dtd + "' \n" );
    205            sb.append( "[\n<!ELEMENT VendorSpecificCapabilities EMPTY>\n]>" );
    206
    207            xml = StringTools.replace( xml, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>",
    208                                       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + "\n" + sb.toString(), false );
    209            xml = StringTools.replace( xml, "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"", "", false );
    210
    211            try {
    212                PrintWriter pw = resp.getWriter();
    213                pw.print( xml );
    214                pw.close();
    215            } catch ( Exception e ) {
    216                LOG.logError( "-", e );
    217            }
    218
    219        }
    220
    221        /**
    222         * handles the response to a print map request
    223         *
    224         * @param response
    225         */
    226        private void handlePrintMapResponse( PrintMapResponseDocument response ) {
    227
    228            resp.setContentType( "application/vnd.ogc.wms_xml" );
    229
    230            XMLFragment xml = new XMLFragment( response.getRootElement() );
    231            try {
    232                PrintWriter pw = resp.getWriter();
    233                xml.prettyPrint( pw );
    234                pw.close();
    235            } catch ( Exception e ) {
    236                LOG.logError( "-", e );
    237            }
    238
    239        }
    240
    241    }