    001    //$HeadURL: svn+ssh://developername@svn.wald.intevation.org/deegree/base/trunk/src/org/deegree/framework/concurrent/DoServiceTask.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.framework.concurrent;
    037
    038    import java.util.concurrent.Callable;
    039
    040    import org.deegree.ogcwebservices.OGCWebServiceRequest;
    041    import org.deegree.ogcwebservices.wms.dataaccess.ExternalDataAccess;
    042    import org.deegree.ogcwebservices.wms.dataaccess.ExternalRasterDataAccess;
    043    import org.deegree.ogcwebservices.wms.dataaccess.ExternalVectorDataAccess;
    044    import org.deegree.ogcwebservices.wms.operation.GetFeatureInfo;
    045    import org.deegree.ogcwebservices.wms.operation.GetLegendGraphic;
    046    import org.deegree.ogcwebservices.wms.operation.GetMap;
    047
    048    /**
    049     * <code>DoServiceTask</code> is the Callable class that should be used by all services to invoke other services.
    050     *
    051     * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
    052     * @author last edited by: $Author: apoth $
    053     *
    054     * @version $Revision: 10660 $, $Date: 2008-03-24 22:39:54 +0100 (Mo, 24 Mrz 2008) $
    055     */
    056    public class DoExternalAccessTask implements Callable<Object> {
    057
    058        private ExternalDataAccess externalDataAccess;
    059
    060        private OGCWebServiceRequest request;
    061
    062        /**
    063         *
    064         * @param externalDataAccess
    065         * @param request
    066         */
    067        public DoExternalAccessTask( ExternalDataAccess externalDataAccess, OGCWebServiceRequest request ) {
    068            this.externalDataAccess = externalDataAccess;
    069            this.request = request;
    070        }
    071
    072        /**
    073         * @return the result of the execution or <code>null</code> if incoming request is not understood by assigned
    074         *         {@link ExternalDataAccess}
    075         */
    076        public Object call()
    077                                throws Exception {
    078            if ( request instanceof GetMap ) {
    079                if ( externalDataAccess instanceof ExternalRasterDataAccess ) {
    080                    return ( (ExternalRasterDataAccess) externalDataAccess ).perform( (GetMap) request );
    081                }
    082                return ( (ExternalVectorDataAccess) externalDataAccess ).perform( (GetMap) request );
    083            } else if ( request instanceof GetFeatureInfo ) {
    084                return externalDataAccess.perform( (GetFeatureInfo) request );
    085            } else if ( request instanceof GetLegendGraphic ) {
    086                return externalDataAccess.perform( (GetLegendGraphic) request );
    087            }
    088            return null;
    089        }
    090    }