001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/enterprise/control/AbstractSecuredListener.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.enterprise.control;
037
038 /**
039 * This abstract <tt>Listener</tt> ensures that only privileged users have access to the services
040 * provided by derived implementations.
041 * <p> - This class is extended by Listeners that may require security checks. - The extended
042 * classes may then be extended again by an concrete implementation (with a certain security model)
043 * that overwrites the "actionPerformed"-method to perform the security check.
044 * <p>
045 *
046 * @author <a href="mschneider@lat-lon.de">Markus Schneider</a>
047 */
048 public abstract class AbstractSecuredListener extends AbstractListener {
049
050 /**
051 * Has to be overwritten by the concrete <tt>Listener</tt>.
052 * <p>
053 *
054 * @param event
055 */
056 public void actionPerformed( FormEvent event ) {
057 // security checks go here
058 performPrivilegedOperation( event );
059
060 }
061
062 /**
063 * @param event
064 */
065 public abstract void performPrivilegedOperation( FormEvent event );
066
067 }