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, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.oozie.client.rest; 019 020 import java.text.ParseException; 021 import java.text.SimpleDateFormat; 022 import java.util.ArrayList; 023 import java.util.Date; 024 import java.util.List; 025 import java.util.Locale; 026 import java.util.TimeZone; 027 028 import org.json.simple.JSONArray; 029 import org.json.simple.JSONObject; 030 031 032 /** 033 * Json utils methods. 034 */ 035 public class JsonUtils { 036 037 /** 038 * Format a Date in RFC822 GMT. 039 * 040 * @param date date to format. 041 * @return RFC822 GMT for the date, <code>null</code> if the date was <code>null</null>. 042 */ 043 public static String formatDateRfc822(Date date) { 044 if (date != null) { 045 SimpleDateFormat dateFormater = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US); 046 dateFormater.setTimeZone(TimeZone.getTimeZone("GMT")); 047 return dateFormater.format(date); 048 } 049 return null; 050 } 051 052 /** 053 * Parse a string in RFC822 GMT format. 054 * 055 * @param str string to parse. 056 * @return parsed date, <code>null</code> if the string was <code>null</null> or in an invalid format. 057 */ 058 static Date parseDateRfc822(String str) { 059 if (str != null) { 060 try { 061 SimpleDateFormat dateFormater = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US); 062 dateFormater.setTimeZone(TimeZone.getTimeZone("GMT")); 063 return dateFormater.parse(str); 064 } 065 catch (ParseException ex) { 066 return null; 067 } 068 } 069 return null; 070 } 071 072 }