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.asn1.actions; 021 022 023import org.apache.directory.api.asn1.DecoderException; 024import org.apache.directory.api.asn1.ber.Asn1Container; 025import org.apache.directory.api.asn1.ber.grammar.GrammarAction; 026import org.apache.directory.api.asn1.ber.tlv.TLV; 027import org.apache.directory.api.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 * @param <C> The container type 036 * 037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 038 */ 039public class CheckNotNullLength<C extends Asn1Container> extends GrammarAction<C> 040{ 041 /** The logger */ 042 private static final Logger LOG = LoggerFactory.getLogger( CheckNotNullLength.class ); 043 044 045 /** 046 * Instantiates the action. 047 */ 048 public CheckNotNullLength() 049 { 050 super( "Check that the length is not null" ); 051 } 052 053 054 /** 055 * {@inheritDoc} 056 */ 057 @Override 058 public void action( C container ) throws DecoderException 059 { 060 TLV tlv = container.getCurrentTLV(); 061 062 // The Length should not be null 063 if ( tlv.getLength() == 0 ) 064 { 065 LOG.error( I18n.err( I18n.ERR_04066 ) ); 066 067 // This will generate a PROTOCOL_ERROR 068 throw new DecoderException( I18n.err( I18n.ERR_04067 ) ); 069 } 070 } 071}