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 */
020package org.apache.directory.api.ldap.extras.controls.changeNotifications_impl;
021
022
023import java.nio.ByteBuffer;
024
025import org.apache.directory.api.asn1.Asn1Object;
026import org.apache.directory.api.asn1.DecoderException;
027import org.apache.directory.api.asn1.EncoderException;
028import org.apache.directory.api.ldap.codec.api.ControlDecorator;
029import org.apache.directory.api.ldap.codec.api.LdapApiService;
030import org.apache.directory.api.ldap.extras.controls.changeNotifications.ChangeNotifications;
031
032
033/**
034 * A decorating wrapper for a ChangeNotifications Control.
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 */
038public class ChangeNotificationsDecorator extends ControlDecorator<ChangeNotifications> implements ChangeNotifications
039{
040
041    /**
042     * Default constructor
043     * 
044     * @param codec The LDAP Service to use
045     * @param control The ChangeNotification control to decorate
046     */
047    public ChangeNotificationsDecorator( LdapApiService codec, ChangeNotifications control )
048    {
049        super( codec, control );
050    }
051
052
053    /**
054     * Returns 0 every time.
055     */
056    @Override
057    public int computeLength()
058    {
059        return 0;
060    }
061
062
063    /**
064     * {@inheritDoc}
065     */
066    @Override
067    public Asn1Object decode( byte[] controlBytes ) throws DecoderException
068    {
069        return this;
070    }
071
072
073    /**
074     * {@inheritDoc}
075     */
076    @Override
077    public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException
078    {
079        return buffer;
080    }
081}