1 /*
2 * Copyright 2005 The Apache Software Foundation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17
18 package org.apache.asn1.der;
19
20 import java.text.ParseException;
21 import java.text.SimpleDateFormat;
22 import java.util.Date;
23 import java.util.TimeZone;
24
25 /**
26 * DER Generalized time object.
27 */
28 public class DERGeneralizedTime extends DERString
29 {
30 private static final TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone( "UTC" );
31 private static final SimpleDateFormat dateFormat = new SimpleDateFormat( "yyyyMMddHHmmss'Z'" );
32
33 static
34 {
35 dateFormat.setTimeZone( UTC_TIME_ZONE );
36 }
37
38 /**
39 * Basic DERObject constructor.
40 */
41 DERGeneralizedTime( byte[] value )
42 {
43 super( GENERALIZED_TIME, value );
44 }
45
46 /**
47 * Static factory method, type-conversion operator.
48 */
49 public static DERGeneralizedTime valueOf( Date date )
50 {
51 String dateString = null;
52
53 synchronized (dateFormat)
54 {
55 dateString = dateFormat.format( date );
56 }
57
58 byte[] bytes = stringToByteArray( dateString );
59
60 return new DERGeneralizedTime( bytes );
61 }
62
63 /**
64 * Lazy accessor
65 * @return Date representation of this DER Generalized Time
66 * @throws ParseException
67 */
68 public Date getDate()
69 throws ParseException
70 {
71 String string = byteArrayToString( value );
72
73
74 synchronized (dateFormat)
75 {
76 return dateFormat.parse( string );
77 }
78 }
79 }
80