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
021 package org.apache.directory.server.changepw.protocol;
022
023
024 import org.apache.directory.server.changepw.io.ChangePasswordRequestDecoder;
025 import org.apache.directory.server.i18n.I18n;
026 import org.apache.mina.core.buffer.IoBuffer;
027 import org.apache.mina.core.session.IoSession;
028 import org.apache.mina.filter.codec.CumulativeProtocolDecoder;
029 import org.apache.mina.filter.codec.ProtocolDecoderOutput;
030
031
032 /**
033 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
034 * @version $Rev: 549315 $, $Date: 2007-06-20 18:13:53 -0700 (Wed, 20 Jun 2007) $
035 */
036 public class ChangePasswordTcpDecoder extends CumulativeProtocolDecoder
037 {
038 private ChangePasswordRequestDecoder decoder = new ChangePasswordRequestDecoder();
039
040 private int maxObjectSize = 16384; // 16KB
041
042
043 /**
044 * Returns the allowed maximum size of the object to be decoded.
045 * If the size of the object to be decoded exceeds this value, this
046 * decoder will throw a {@link BufferDataException}. The default
047 * value is <tt>16384</tt> (16KB).
048 *
049 * @return The max object size.
050 */
051 public int getMaxObjectSize()
052 {
053 return maxObjectSize;
054 }
055
056
057 /**
058 * Sets the allowed maximum size of the object to be decoded.
059 * If the size of the object to be decoded exceeds this value, this
060 * decoder will throw a {@link BufferDataException}. The default
061 * value is <tt>16384</tt> (16KB).
062 *
063 * @param maxObjectSize
064 */
065 public void setMaxObjectSize( int maxObjectSize )
066 {
067 if ( maxObjectSize <= 0 )
068 {
069 throw new IllegalArgumentException( I18n.err( I18n.ERR_634, maxObjectSize ) );
070 }
071
072 this.maxObjectSize = maxObjectSize;
073 }
074
075
076 @Override
077 protected boolean doDecode( IoSession session, IoBuffer in, ProtocolDecoderOutput out ) throws Exception
078 {
079 if ( !in.prefixedDataAvailable( 4, maxObjectSize ) )
080 {
081 return false;
082 }
083
084 in.getInt();
085
086 out.write( decoder.decode( in.buf() ) );
087
088 return true;
089 }
090 }