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 with the given time zone. 039 * 040 * @param date date to format. 041 * @param timeZoneId the time zone to use 042 * @return RFC822 for the date, <code>null</code> if the date was <code>null</null>. 043 */ 044 public static String formatDateRfc822(Date date, String timeZoneId) { 045 if (date != null) { 046 TimeZone tZone = TimeZone.getTimeZone(timeZoneId); 047 SimpleDateFormat dateFormater = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US); 048 dateFormater.setTimeZone(tZone); 049 return dateFormater.format(date); 050 } 051 return null; 052 } 053 054 /** 055 * Format a Date in RFC822 GMT. 056 * 057 * @param date date to format. 058 * @return RFC822 GMT for the date, <code>null</code> if the date was <code>null</null>. 059 */ 060 public static String formatDateRfc822(Date date) { 061 return formatDateRfc822(date, "GMT"); 062 } 063 064 /** 065 * Parse a string in RFC822 GMT format. 066 * 067 * @param str string to parse. 068 * @return parsed date, <code>null</code> if the string was <code>null</null> or in an invalid format. 069 */ 070 static Date parseDateRfc822(String str) { 071 if (str != null) { 072 try { 073 SimpleDateFormat dateFormater = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US); 074 dateFormater.setTimeZone(TimeZone.getTimeZone("GMT")); 075 return dateFormater.parse(str); 076 } 077 catch (ParseException ex) { 078 return null; 079 } 080 } 081 return null; 082 } 083 084 }