    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/ogcwebservices/sos/WFSRequester.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.ogcwebservices.sos;
    037
    038    import java.io.ByteArrayInputStream;
    039    import java.io.ByteArrayOutputStream;
    040    import java.io.IOException;
    041
    042    import javax.xml.parsers.ParserConfigurationException;
    043    import javax.xml.transform.TransformerException;
    044
    045    import org.deegree.framework.log.ILogger;
    046    import org.deegree.framework.log.LoggerFactory;
    047    import org.deegree.framework.xml.XMLParsingException;
    048    import org.deegree.framework.xml.XMLTools;
    049    import org.deegree.model.feature.FeatureCollection;
    050    import org.deegree.model.feature.GMLFeatureAdapter;
    051    import org.deegree.ogcwebservices.OGCWebService;
    052    import org.deegree.ogcwebservices.wfs.operation.FeatureResult;
    053    import org.deegree.ogcwebservices.wfs.operation.GetFeature;
    054    import org.w3c.dom.Document;
    055    import org.xml.sax.SAXException;
    056
    057    /**
    058     * sends a request to a WFS and checks the result for errors
    059     *
    060     * @author <a href="mailto:mkulbe@lat-lon.de">Matthias Kulbe </a>
    061     * @author last edited by: $Author:wanhoff$
    062     *
    063     * @version $Revision: 18195 $, $Date:20.03.2007$
    064     */
    065    public class WFSRequester {
    066
    067        private static ILogger LOG = LoggerFactory.getLogger( WFSRequester.class );
    068
    069        /**
    070         *
    071         * @param request
    072         * @param ows
    073         * @return the resulting document
    074         * @throws Exception
    075         * @throws IOException
    076         * @throws SAXException
    077         * @throws ParserConfigurationException
    078         * @throws XMLParsingException
    079         * @throws TransformerException
    080         */
    081        public static Document sendWFSrequest( Document request, OGCWebService ows )
    082                                throws Exception {
    083
    084            GetFeature getFeature = GetFeature.create( "ID-" + System.currentTimeMillis(), request.getDocumentElement() );
    085            FeatureResult result = (FeatureResult) ows.doService( getFeature );
    086            ByteArrayOutputStream bos = new ByteArrayOutputStream( 100000 );
    087
    088            new GMLFeatureAdapter().export( (FeatureCollection) result.getResponse(), bos );
    089
    090            Document resultDoc = XMLTools.parse( new ByteArrayInputStream( bos.toByteArray() ) );
    091
    092            String nn = resultDoc.getDocumentElement().getLocalName();
    093
    094            if ( "FeatureCollection".equals( nn ) ) {
    095                return resultDoc;
    096            }
    097            LOG.logDebug( "error: invalid wfs result" );
    098            throw new XMLParsingException( "returned document doesn't contain a valid " + "WFS GetFeature response" );
    099
    100        }
    101
    102    }