001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcwebservices/wpvs/WPVServiceFactory.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.io.IOException;
040    import java.net.URL;
041    
042    import org.deegree.framework.xml.InvalidConfigurationException;
043    import org.deegree.ogcwebservices.wpvs.configuration.WPVSConfiguration;
044    import org.deegree.ogcwebservices.wpvs.configuration.WPVSConfigurationDocument;
045    import org.xml.sax.SAXException;
046    
047    /**
048     * Factory class for creating instances of <code>WFService</code>.
049     *
050     * @author <a href="mailto:taddei@lat-lon.de">Ugo Taddei</a>
051     * @author last edited by: $Author: mschneider $
052     *
053     * $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
054     *
055     */
056    public class WPVServiceFactory {
057    
058        private static WPVSConfiguration CONFIG;
059    
060        private WPVServiceFactory() {
061            // prevent instantiation
062        }
063    
064        /**
065         * Creates an instance of a WPVService
066         *
067         * @return a wpvService class with the WPVSConfiguration if the WPVSConfiguration ==
068         *         <code>null</code> null will be returned.
069         */
070        public static WPVService createInstance() {
071            if ( CONFIG != null )
072                return new WPVService( CONFIG );
073            return null;
074        }
075    
076        /**
077         * Creates a new instance of a WPVService based on <code>config</code>
078         *
079         * @param config
080         *            the configuration object used to initalize the new instance
081         * @return a new WPVService Instance, instantiated with the given WPVSConfiguration
082         */
083        public static WPVService getInstance( WPVSConfiguration config ) {
084            return new WPVService( config );
085        }
086    
087        /**
088         * Sets the <code>WPVSConfiguration</code>. Afterwards, all <code>WPVSService</code>
089         * instances returned by <code>createInstance()</code> will use this configuration.
090         *
091         * @param wpvsConfiguration
092         */
093        public synchronized static void setConfiguration( WPVSConfiguration wpvsConfiguration ) {
094            CONFIG = wpvsConfiguration;
095        }
096    
097        /**
098         * Sets the service configuration used in this object to be that pointed at by the
099         * serviceConfigurationURL
100         *
101         * @param serviceConfigurationURL
102         *            the URL pointing at the configuration file for a WPV Service
103         * @throws InvalidConfigurationException
104         *             if the configuration is invalid
105         * @throws IOException
106         */
107        public synchronized static void setConfiguration( URL serviceConfigurationURL )
108                                throws InvalidConfigurationException, IOException {
109            try {
110                WPVSConfigurationDocument wpvsConfigDoc = new WPVSConfigurationDocument();
111                wpvsConfigDoc.load( serviceConfigurationURL );
112                WPVServiceFactory.setConfiguration( wpvsConfigDoc.parseConfiguration() );
113            } catch ( InvalidConfigurationException e ) {
114                throw new InvalidConfigurationException( "WPVServiceFactory", e.getMessage() );
115            } catch ( SAXException e ) {
116                throw new InvalidConfigurationException( "WPVServiceFactory", e.getMessage() );
117            }
118        }
119    }