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.model.message.Message; 029import org.slf4j.Logger; 030import org.slf4j.LoggerFactory; 031 032 033/** 034 * The action used to initialize an LdapMessage 035 * <pre> 036 * LDAPMessage --> SEQUENCE { ... 037 * 038 * We have a LDAPMessage, and the tag must be 0x30. 039 * 040 * The next state will be LDAP_MESSAGE_STATE 041 * </pre> 042 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 043 */ 044public class InitLdapMessage extends GrammarAction<LdapMessageContainer<Message>> 045{ 046 /** The logger */ 047 private static final Logger LOG = LoggerFactory.getLogger( InitLdapMessage.class ); 048 049 050 /** 051 * Instantiates a new action. 052 */ 053 public InitLdapMessage() 054 { 055 super( "LdapMessage initialization" ); 056 } 057 058 059 /** 060 * {@inheritDoc} 061 */ 062 @Override 063 public void action( LdapMessageContainer<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_05142_ZERO_LENGTH_MESSAGE ) ); 071 072 // This will generate a PROTOCOL_ERROR 073 throw new DecoderException( I18n.err( I18n.ERR_05143_EMPTY_MESSAGE ) ); 074 } 075 } 076}