001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/framework/util/Interceptor.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.framework.util;
037
038 import java.lang.reflect.InvocationTargetException;
039 import java.lang.reflect.Method;
040
041 import org.deegree.framework.log.ILogger;
042 import org.deegree.framework.log.LoggerFactory;
043
044 /**
045 * @author <a href="mailto:tfr@users.sourceforge.net">Torsten Friebe </A>
046 *
047 * @author last edited by: $Author: mschneider $
048 *
049 * @version 2.0, $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
050 *
051 * @see <a href="http://www.dofactory.com/patterns/PatternChain.aspx">Chain of Responsibility Design
052 * Pattern </a>
053 *
054 * @since 2.0
055 */
056 public abstract class Interceptor {
057
058 /**
059 * Logging for all Interceptors
060 */
061 protected static final ILogger LOG = LoggerFactory.getLogger( Interceptor.class );
062
063 /**
064 * Do an invocation of the given method while being able to something else first.
065 * @param method
066 * @param params
067 * @return some object
068 * @throws IllegalAccessException
069 * @throws InvocationTargetException
070 */
071 protected abstract Object handleInvocation( Method method, Object[] params )
072 throws IllegalAccessException, InvocationTargetException;
073
074 /**
075 *
076 */
077 protected Interceptor nextInterceptor;
078
079 /**
080 * @return the target
081 */
082 protected Object getTarget() {
083 return this.nextInterceptor.getTarget();
084 }
085 }