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 }