1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.api.asn1.ber.tlv;
21
22
23 import org.apache.directory.api.i18n.I18n;
24 import org.apache.directory.api.util.Strings;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
27
28
29 /**
30 * Parse and decode a Boolean value.
31 *
32 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
33 */
34 public final class BooleanDecoder
35 {
36 /** The logger */
37 private static final Logger LOG = LoggerFactory.getLogger( BooleanDecoder.class );
38
39
40 /**
41 * Parse a Value containing a byte[] and send back a boolean.
42 *
43 * @param value The Value to parse
44 * @return A boolean.
45 * @throws BooleanDecoderException Thrown if the Value does not contains a boolean
46 */
47 public static boolean parse( BerValue value ) throws BooleanDecoderException
48 {
49 byte[] bytes = value.getData();
50
51 if ( Strings.isEmpty( bytes ) )
52 {
53 throw new BooleanDecoderException( I18n.err( I18n.ERR_00034_0_BYTES_LONG_BOOLEAN ) );
54 }
55
56 if ( bytes.length != 1 )
57 {
58 throw new BooleanDecoderException( I18n.err( I18n.ERR_00035_N_BYTES_LONG_BOOLEAN ) );
59 }
60
61 if ( ( bytes[0] != 0 ) && ( bytes[0] != ( byte ) 0xFF ) )
62 {
63 LOG.warn( "A boolean must be encoded with a 0x00 or a 0xFF value" );
64 }
65
66 return bytes[0] != 0;
67 }
68 }