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.asn1.actions; 021 022 023import org.apache.directory.shared.asn1.DecoderException; 024import org.apache.directory.shared.asn1.ber.Asn1Container; 025import org.apache.directory.shared.asn1.ber.grammar.GrammarAction; 026import org.apache.directory.shared.asn1.ber.tlv.TLV; 027import org.apache.directory.shared.i18n.I18n; 028import org.slf4j.Logger; 029import org.slf4j.LoggerFactory; 030 031 032/** 033 * An action that checks the length is not null 034 * 035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 036 */ 037public class CheckNotNullLength<E extends Asn1Container> extends GrammarAction<E> 038{ 039 /** The logger */ 040 private static final Logger LOG = LoggerFactory.getLogger( CheckNotNullLength.class ); 041 042 /** 043 * Instantiates the action. 044 */ 045 public CheckNotNullLength() 046 { 047 super( "Check that the length is not null" ); 048 } 049 050 051 /** 052 * {@inheritDoc} 053 */ 054 public void action( E container ) throws DecoderException 055 { 056 TLV tlv = container.getCurrentTLV(); 057 058 // The Length should not be null 059 if ( tlv.getLength() == 0 ) 060 { 061 LOG.error( I18n.err( I18n.ERR_04066 ) ); 062 063 // This will generate a PROTOCOL_ERROR 064 throw new DecoderException( I18n.err( I18n.ERR_04067 ) ); 065 } 066 } 067}