001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/portal/portlet/modules/actions/LogoutUser.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.portal.portlet.modules.actions;
037    
038    import java.io.File;
039    import java.io.FileOutputStream;
040    import java.io.IOException;
041    import java.util.Enumeration;
042    
043    import javax.servlet.http.HttpSession;
044    import javax.xml.parsers.ParserConfigurationException;
045    
046    import org.deegree.framework.xml.XMLFragment;
047    import org.deegree.portal.context.ViewContext;
048    import org.deegree.portal.context.XMLFactory;
049    
050    /**
051     * This class can be used within listener classes that will be called if a user logs out from a
052     * portal. All contexts used at this moment will be stored in the users WMC directory having
053     * filenames starting with 'VIEWCONTEXT'.<BR>
054     * At the moment a concrete listener is available for Jetspeed 1.6
055     *
056     * @see org.deegree.portal.portlet.modules.actions.IGeoJetspeed16LogoutUser
057     *
058     *
059     * @version $Revision: 18195 $
060     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
061     * @author last edited by: $Author: mschneider $
062     *
063     * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
064     *
065     * @since 2.0
066     */
067    class LogoutUser {
068    
069        /**
070         *
071         * @param dir
072         * @param ses
073         * @throws IOException
074         * @throws ParserConfigurationException
075         */
076        void storeCurrentContexts( File dir, HttpSession ses )
077                                throws ParserConfigurationException, IOException {
078    
079            Enumeration en = ses.getAttributeNames();
080            // because a porlat may use more than one web map context
081            // parallel at different map windows we must iterate over
082            // all session attributes indicating a WMC currently in use
083            if ( en != null ) {
084    
085                while ( en.hasMoreElements() ) {
086                    String name = (String) en.nextElement();
087                    Object val = ses.getAttribute( name );
088                    if ( val != null && val instanceof ViewContext
089                         && name.indexOf( AbstractPortletPerform.CURRENT_WMC ) > -1 ) {
090                        storeContext( dir, name, (ViewContext) val );
091                    }
092                }
093            }
094        }
095    
096        /**
097         * stores the passed web map context as loggedout WMC into the current users WMC directory
098         *
099         * @param dir
100         * @param name
101         * @param context
102         * @throws ParserConfigurationException
103         * @throws IOException
104         */
105        private void storeContext( File dir, String name, ViewContext context )
106                                throws ParserConfigurationException, IOException {
107    
108            XMLFragment xml = XMLFactory.export( context );
109    
110            File file = new File( dir.getAbsolutePath() + '/' + name + ".xml" );
111    
112            FileOutputStream fos = new FileOutputStream( file );
113            xml.write( fos );
114            fos.close();
115    
116        }
117    
118    }