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
21 package org.apache.mailet.base;
22
23 import java.util.Date;
24
25 import javax.mail.internet.MailDateFormat;
26
27
28 /**
29 * A thread safe wrapper for the <code>javax.mail.internet.MailDateFormat</code> class.
30 *
31 */
32 public class RFC822DateFormat extends SynchronizedDateFormat {
33 /**
34 * A static instance of the RFC822DateFormat, used by toString
35 */
36 private static RFC822DateFormat instance;
37
38 static {
39 instance = new RFC822DateFormat();
40 }
41
42 /**
43 * This static method allows us to format RFC822 dates without
44 * explicitly instantiating an RFC822DateFormat object.
45 *
46 * @return java.lang.String
47 * @param d Date
48 *
49 * @deprecated This method is not necessary and is preserved for API
50 * backwards compatibility. Users of this class should
51 * instantiate an instance and use it as they would any
52 * other DateFormat object.
53 */
54 public static String toString(Date d) {
55 return instance.format(d);
56 }
57
58 /**
59 * Constructor for RFC822DateFormat
60 */
61 public RFC822DateFormat() {
62 super(new MailDateFormat());
63 }
64 }