    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/ogcwebservices/wpvs/WPVService.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.ogcwebservices.wpvs;
    038
    039    import java.lang.reflect.Constructor;
    040    import java.lang.reflect.InvocationTargetException;
    041    import java.util.HashMap;
    042    import java.util.Set;
    043    import java.util.concurrent.ConcurrentHashMap;
    044
    045    import org.deegree.framework.log.ILogger;
    046    import org.deegree.framework.log.LoggerFactory;
    047    import org.deegree.framework.trigger.TriggerProvider;
    048    import org.deegree.ogcwebservices.OGCWebService;
    049    import org.deegree.ogcwebservices.OGCWebServiceException;
    050    import org.deegree.ogcwebservices.OGCWebServiceRequest;
    051    import org.deegree.ogcwebservices.getcapabilities.OGCCapabilities;
    052    import org.deegree.ogcwebservices.wpvs.configuration.WPVSConfiguration;
    053    import org.deegree.ogcwebservices.wpvs.operation.Get3DFeatureInfo;
    054    import org.deegree.ogcwebservices.wpvs.operation.GetView;
    055    import org.deegree.ogcwebservices.wpvs.operation.WPVSGetCapabilities;
    056
    057    /**
    058     * A <code>WPVService</code> deligates the clients Requests. If the rquest is an instance of
    059     * GetView a (configured) GetViewHandler is instantiated to create an perspective image.
    060     *
    061     * @author <a href="mailto:taddei@lat-lon.de">Ugo Taddei</a>
    062     * @author last edited by: $Author: mschneider $
    063     *
    064     * $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    065     *
    066     */
    067    public class WPVService implements OGCWebService {
    068
    069        private static final TriggerProvider TP = TriggerProvider.create( WPVService.class );
    070
    071        private static final ILogger LOG = LoggerFactory.getLogger( WPVService.class );
    072
    073        private WPVSConfiguration configuration;
    074
    075        private ConcurrentHashMap<String, GetViewHandler> getViewHandlers;
    076
    077        private String defaultSplitter;
    078
    079        /**
    080         * Creates a new instance of <code>WPVService</code> from the configuration.
    081         *
    082         * @param configuration
    083         */
    084        WPVService( WPVSConfiguration configuration ) {
    085            this.configuration = configuration;
    086            HashMap<String, String> configuredHandlers = HandlerMapping.getConfiguredGetViewHandlers();
    087            Set<String> keys = configuredHandlers.keySet();
    088            defaultSplitter = configuration.getDeegreeParams().getDefaultSplitter();
    089            // if no defaulthandler in the configuration QUAD will be the Defaultsplitter
    090            getViewHandlers = new ConcurrentHashMap<String, GetViewHandler>();
    091            for ( String key : keys ) {
    092                try {
    093                    getViewHandlers.put( key, createHandler( configuredHandlers.get( key ) ) );
    094                } catch ( OGCWebServiceException e ) {
    095                    LOG.logError( e.getLocalizedMessage(), e );
    096                }
    097            }
    098            // an error occurred while instantiating or no handlers in the bundle or the defaultsplitter
    099            // was not in the bundle
    100            if ( getViewHandlers.isEmpty() || !getViewHandlers.containsKey( defaultSplitter ) ) {
    101                getViewHandlers.put( defaultSplitter, new DefaultGetViewHandler( this ) );
    102            }
    103
    104        }
    105
    106        /**
    107         * Returns the capabilities of this service.
    108         *
    109         * @return the capabilities, this is an instance of <code>WPVSCapabilities</code>
    110         */
    111        public OGCCapabilities getCapabilities() {
    112            return this.configuration;
    113        }
    114
    115        /**
    116         * Performs the handling of the passed OGCWebServiceEvent directly and returns the result to the
    117         * calling class/ method.
    118         *
    119         * @param request
    120         *            WFS request to perform
    121         *
    122         * @throws OGCWebServiceException
    123         */
    124        public Object doService( OGCWebServiceRequest request )
    125                                throws OGCWebServiceException {
    126
    127            request = (OGCWebServiceRequest) TP.doPreTrigger( this, request )[0];
    128
    129            Object response = null;
    130
    131            if ( request instanceof WPVSGetCapabilities ) {
    132                // TODO implement partial responses (if only certain sections are requested)
    133                response = getCapabilities();
    134            } else if ( request instanceof GetView ) {
    135
    136                String splitter = ( (GetView) request ).getVendorSpecificParameter( "SPLITTER" );
    137                if ( splitter == null || splitter.trim().equals( "" ) )
    138                    splitter = defaultSplitter;
    139                GetViewHandler gvh = getViewHandlers.get( splitter );
    140                if ( gvh == null ) {
    141                    gvh = getViewHandlers.get( defaultSplitter );
    142                }
    143                // if ( "QUAD".equals( ) {
    144                // gvh = createHandler( HandlerMapping.getString( "WPVService.GETVIEW.QUAD" ) );
    145                // } else {
    146                // gvh = createHandler( HandlerMapping.getString( "WPVService.GETVIEW.BOX" ) );
    147                // }
    148                response = gvh.handleRequest( (GetView) request );
    149
    150            } else if ( request instanceof Get3DFeatureInfo ) {
    151                Get3DFeatureInfoHandler get3DFeatureInfoHandler = new DefaultGet3DFeatureInfoHandler( this );
    152                response = get3DFeatureInfoHandler.handleRequest( (Get3DFeatureInfo) request );
    153
    154            } else {
    155
    156                throw new OGCWebServiceException( getClass().getName(), "Unknown request type: "
    157                                                                        + request.getClass().getName() );
    158            }
    159
    160            return TP.doPostTrigger( this, response )[0];
    161        }
    162
    163        @SuppressWarnings("unchecked")
    164        private GetViewHandler createHandler( String className )
    165                                throws OGCWebServiceException {
    166
    167            // describes the signature of the required constructor
    168            // Class[] cl = new Class[1];
    169            // cl[0] = WPVService.class;
    170
    171            // set parameter to submitt to the constructor
    172            // Object[] o = new Object[1];
    173            // o[0] = this;
    174
    175            GetViewHandler handler = null;
    176
    177            try {
    178                // get constructor
    179                Class creator = Class.forName( className );
    180                Constructor<GetViewHandler> con = creator.getConstructor( WPVService.class );
    181
    182                // call constructor and instantiate a new DataStore
    183                handler = con.newInstance( this );
    184            } catch ( ClassCastException cce ) {
    185                throw new OGCWebServiceException( "The requested class " + className + " is not of type GetViewHandler! \n"
    186                                                  + cce.toString() );
    187            } catch ( ClassNotFoundException cce ) {
    188                throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + cce.toString() );
    189            } catch ( NoSuchMethodException nsme ) {
    190                throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + nsme.toString() );
    191            } catch ( InstantiationException ie ) {
    192                throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + ie.toString() );
    193            } catch ( IllegalAccessException iae ) {
    194                throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + iae.toString() );
    195            } catch ( InvocationTargetException ite ) {
    196                throw (OGCWebServiceException) ite.getCause();
    197            } catch ( Exception e ) {
    198                throw new OGCWebServiceException( "Couldn't instantiate " + className + "! \n" + e.toString() );
    199            }
    200
    201            return handler;
    202        }
    203
    204        /**
    205         * Returns a GetViewHandler which is configured to handle the given kind of splitter.
    206         *
    207         * @param splitter
    208         *            the name of the splitter (supported are QUAD and BBOX)
    209         * @return the configured GetViewHandler or the default GetViewHandler if the given String is
    210         *         null or empty or not known.
    211         */
    212        public GetViewHandler getGetViewHandler( String splitter ) {
    213            if ( splitter == null || splitter.trim().equals( "" ) )
    214                return getViewHandlers.get( defaultSplitter );
    215            GetViewHandler gvh = getViewHandlers.get( splitter );
    216            if ( gvh == null ) {
    217                gvh = getViewHandlers.get( defaultSplitter );
    218            }
    219            return gvh;
    220        }
    221
    222        /**
    223         * @return the configuration
    224         */
    225        protected WPVSConfiguration getConfiguration() {
    226            return configuration;
    227        }
    228
    229    }