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