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.apache.directory.shared.util.Strings; 029import org.slf4j.Logger; 030import org.slf4j.LoggerFactory; 031 032 033/** 034 * The action used read a BITSTRING from a TLV 035 * 036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 037 */ 038public abstract class AbstractReadBitString<E extends Asn1Container> extends GrammarAction<E> 039{ 040 /** The logger */ 041 private static final Logger LOG = LoggerFactory.getLogger( AbstractReadBitString.class ); 042 043 /** Speedup for logs */ 044 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 045 046 047 /** 048 * Instantiates a new AbstractReadByteArray action. 049 */ 050 public AbstractReadBitString( String name ) 051 { 052 super( name ); 053 } 054 055 056 /** 057 * gives a byte array to be set to the appropriate field of the ASN.1 object 058 * present in the container 059 * 060 * @param data the data of the read TLV present in byte array format 061 * @param container the container holding the ASN.1 object 062 */ 063 protected abstract void setBitString( byte[] data, E container ); 064 065 066 /** 067 * {@inheritDoc} 068 */ 069 public final void action( E container ) throws DecoderException 070 { 071 TLV tlv = container.getCurrentTLV(); 072 073 // The Length should not be null, and should be 5 074 if ( tlv.getLength() != 5 ) 075 { 076 LOG.error( I18n.err( I18n.ERR_04066 ) ); 077 078 // This will generate a PROTOCOL_ERROR 079 throw new DecoderException( I18n.err( I18n.ERR_04067 ) ); 080 } 081 082 byte[] data = tlv.getValue().getData(); 083 setBitString( data, container ); 084 085 if ( IS_DEBUG ) 086 { 087 LOG.debug( "BITSTRING value : {}", Strings.dumpBytes( data ) ); 088 } 089 } 090}