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.ber.tlv; 021 022 023import org.apache.directory.shared.i18n.I18n; 024import org.slf4j.Logger; 025import org.slf4j.LoggerFactory; 026 027 028/** 029 * Parse and decode a Boolean value. 030 * 031 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 032 */ 033public final class BooleanDecoder 034{ 035 /** The logger */ 036 private static final Logger LOG = LoggerFactory.getLogger( BooleanDecoder.class ); 037 038 039 /** 040 * Parse a byte buffer and send back a booelan. 041 * 042 * @param value The byte buffer to parse 043 * @return A boolean. 044 * @throws BooleanDecoderException Thrown if the byte stream does not contains a boolean 045 */ 046 public static boolean parse( Value value ) throws BooleanDecoderException 047 { 048 byte[] bytes = value.getData(); 049 050 if ( ( bytes == null ) || ( bytes.length == 0 ) ) 051 { 052 throw new BooleanDecoderException( I18n.err( I18n.ERR_00034_0_BYTES_LONG_BOOLEAN ) ); 053 } 054 055 if ( bytes.length != 1 ) 056 { 057 throw new BooleanDecoderException( I18n.err( I18n.ERR_00035_N_BYTES_LONG_BOOLEAN ) ); 058 } 059 060 if ( ( bytes[0] != 0 ) && ( bytes[0] != ( byte ) 0xFF ) ) 061 { 062 LOG.warn( "A boolean must be encoded with a 0x00 or a 0xFF value" ); 063 } 064 065 return bytes[0] != 0; 066 } 067}