    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_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    }