001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.server.core.interceptor.context;
021    
022    
023    import org.apache.directory.server.core.CoreSession;
024    import org.apache.directory.server.i18n.I18n;
025    import org.apache.directory.shared.ldap.name.DN;
026    
027    
028    /**
029     * An EmptySuffix context used for Interceptors. It contains no data, and mask
030     * the DN in AbstractOperationContext
031     *
032     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
033     * @version $Rev$, $Date$
034     */
035    public abstract class EmptyOperationContext extends AbstractOperationContext
036    {
037        /**
038         * Creates a new instance of EmptyOperationContext.
039         */
040        public EmptyOperationContext( CoreSession session )
041        {
042            super( session, DN.EMPTY_DN );
043        }
044        
045    
046        /**
047         * Set the context DN
048         *
049         * @param dn The DN to set
050         */
051        public void setDn( DN dn )
052        {
053            if ( dn.equals( DN.EMPTY_DN ) )
054            {
055                return;
056            }
057            
058            throw new UnsupportedOperationException( I18n.err( I18n.ERR_324 ) );
059        }
060    
061        
062        /**
063         * @see Object#toString()
064         */
065        public String toString()
066        {
067            return "EmptyOperationContext";
068        }
069    }