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.codec.actions.ldapMessage; 021 022 023import org.apache.directory.api.asn1.DecoderException; 024import org.apache.directory.api.asn1.ber.grammar.GrammarAction; 025import org.apache.directory.api.asn1.ber.tlv.TLV; 026import org.apache.directory.api.i18n.I18n; 027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer; 028import org.apache.directory.api.ldap.codec.api.MessageDecorator; 029import org.apache.directory.api.ldap.model.message.Message; 030import org.slf4j.Logger; 031import org.slf4j.LoggerFactory; 032 033 034/** 035 * The action used to initialize an LdapMessage 036 * <pre> 037 * LDAPMessage --> SEQUENCE { ... 038 * 039 * We have a LDAPMessage, and the tag must be 0x30. 040 * 041 * The next state will be LDAP_MESSAGE_STATE 042 * </pre> 043 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 044 */ 045public class InitLdapMessage extends GrammarAction<LdapMessageContainer<MessageDecorator<? extends Message>>> 046{ 047 /** The logger */ 048 private static final Logger LOG = LoggerFactory.getLogger( InitLdapMessage.class ); 049 050 051 /** 052 * Instantiates a new action. 053 */ 054 public InitLdapMessage() 055 { 056 super( "LdapMessage initialization" ); 057 } 058 059 060 /** 061 * {@inheritDoc} 062 */ 063 public void action( LdapMessageContainer<MessageDecorator<? extends Message>> container ) throws DecoderException 064 { 065 TLV tlv = container.getCurrentTLV(); 066 067 // The Length should not be null 068 if ( tlv.getLength() == 0 ) 069 { 070 LOG.error( I18n.err( I18n.ERR_04066 ) ); 071 072 // This will generate a PROTOCOL_ERROR 073 throw new DecoderException( I18n.err( I18n.ERR_04067 ) ); 074 } 075 } 076}