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.shared.ldap.codec.protocol.mina; 021 022 023import java.nio.ByteBuffer; 024import java.util.ArrayList; 025import java.util.List; 026 027import org.apache.directory.shared.ldap.codec.api.LdapDecoder; 028import org.apache.directory.shared.ldap.codec.api.LdapMessageContainer; 029import org.apache.directory.shared.ldap.codec.api.MessageDecorator; 030import org.apache.directory.shared.ldap.model.message.Message; 031import org.apache.mina.core.buffer.IoBuffer; 032import org.apache.mina.core.session.IoSession; 033import org.apache.mina.filter.codec.ProtocolDecoder; 034import org.apache.mina.filter.codec.ProtocolDecoderOutput; 035 036 037/** 038 * A LDAP message decoder. It is based on shared-ldap decoder. 039 * 040 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 041 */ 042public class LdapProtocolDecoder implements ProtocolDecoder 043{ 044 /** The stateful decoder */ 045 private LdapDecoder decoder; 046 047 048 /** 049 * Creates a new instance of LdapProtocolEncoder. 050 * 051 * @param codec The LDAP codec service associated with this encoder. 052 */ 053 public LdapProtocolDecoder() 054 { 055 this.decoder = new LdapDecoder(); 056 } 057 058 059 /** 060 * {@inheritDoc} 061 */ 062 public void decode( IoSession session, IoBuffer in, ProtocolDecoderOutput out ) throws Exception 063 { 064 @SuppressWarnings("unchecked") 065 LdapMessageContainer<MessageDecorator<? extends Message>> messageContainer = 066 (LdapMessageContainer<MessageDecorator<? extends Message>> ) 067 session.getAttribute( "messageContainer" ); 068 069 if ( session.containsAttribute( "maxPDUSize" ) ) 070 { 071 int maxPDUSize = ( Integer ) session.getAttribute( "maxPDUSize" ); 072 073 messageContainer.setMaxPDUSize( maxPDUSize ); 074 } 075 076 List<Message> decodedMessages = new ArrayList<Message>(); 077 ByteBuffer buf = in.buf(); 078 079 decoder.decode( buf, messageContainer, decodedMessages ); 080 081 for ( Message message : decodedMessages ) 082 { 083 out.write( message ); 084 } 085 } 086 087 088 /** 089 * {@inheritDoc} 090 */ 091 public void finishDecode( IoSession session, ProtocolDecoderOutput out ) throws Exception 092 { 093 // Nothing to do 094 } 095 096 097 /** 098 * {@inheritDoc} 099 */ 100 public void dispose( IoSession session ) throws Exception 101 { 102 // Nothing to do 103 } 104}