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 }