| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.ode.utils; |
| |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.TimeZone; |
| |
| /*** |
| * ISO 8601 date parsing utility. Most date parsing libraries only apply one pattern but |
| * can't be used to parse ISO 8601 that are a set a pattern (mostly elements can be omitted |
| * like time of just seconds). |
| */ |
| public class ISO8601DateParser { |
| |
| public static Date parse(String date) throws java.text.ParseException { |
| String pattern; |
| StringBuffer buffer = new StringBuffer(date.trim()); |
| boolean timezoned = false; |
| |
| switch (buffer.length()) { |
| case 4: |
| // Year: yyyy (eg 1997) |
| pattern = "yyyy"; |
| break; |
| case 7: |
| // Year and month: yyyy-MM (eg 1997-07) |
| pattern = "yyyy-MM"; |
| break; |
| case 10: |
| // Complete date: yyyy-MM-dd (eg 1997-07-16) |
| pattern = "yyyy-MM-dd"; |
| break; |
| default: |
| // Complete date plus hours and minutes: yyyy-MM-ddTHH:mmTZD (eg 1997-07-16T19:20+01:00) |
| // Complete date plus hours, minutes and seconds: yyyy-MM-ddTHH:mm:ssTZD (eg 1997-07-16T19:20:30+01:00) |
| // Complete date plus hours, minutes, seconds and a decimal fraction of a second: yyyy-MM-ddTHH:mm:ss.STZD (eg 1997-07-16T19:20:30.45+01:00) |
| pattern = "yyyy-MM-dd'T'HH:mm:ss.SSS"; |
| |
| if (buffer.length() == 16) { |
| // add seconds |
| buffer.append(":00"); |
| } |
| if (buffer.length() > 16 && buffer.charAt(16) != ':') { |
| // insert seconds |
| buffer.insert(16, ":00"); |
| } |
| if (buffer.length() == 19) { |
| // add milliseconds |
| buffer.append(".000"); |
| } |
| if (buffer.length() > 19 && buffer.charAt(19) != '.') { |
| // insert milliseconds |
| buffer.insert(19, ".000"); |
| } |
| if (buffer.charAt(19) == '.' && (buffer.length() < 22 || |
| (buffer.lastIndexOf("-") < 23 && buffer.lastIndexOf("-") > 19) || |
| (buffer.lastIndexOf("+") < 23 && buffer.lastIndexOf("+") > 0))) |
| buffer.insert(20, "0"); |
| if (buffer.charAt(19) == '.' && (buffer.length() < 22 || |
| (buffer.lastIndexOf("-") < 23 && buffer.lastIndexOf("-") > 19) || |
| (buffer.lastIndexOf("+") < 23 && buffer.lastIndexOf("+") > 0))) |
| buffer.insert(20, "0"); |
| if (buffer.length() > 23) { |
| // append timezone |
| pattern = pattern + "Z"; |
| timezoned = true; |
| } |
| if (buffer.length() == 24 && buffer.charAt(23) == 'Z') { |
| // replace 'Z' with '+0000' |
| buffer.replace(23, 24, "+0000"); |
| } |
| if (buffer.length() == 29 && buffer.charAt(26) == ':') { |
| // delete '.' from 'HH:mm' |
| buffer.deleteCharAt(26); |
| } |
| } |
| |
| // always set time zone on formatter |
| SimpleDateFormat format = new SimpleDateFormat(pattern); |
| if (timezoned) format.setTimeZone(TimeZone.getTimeZone("UTC")); |
| |
| return format.parse(buffer.toString()); |
| } |
| |
| public static Calendar parseCal(String date) throws java.text.ParseException { |
| Date d = parse(date); |
| Calendar cal = Calendar.getInstance(); |
| cal.setTime(d); |
| return cal; |
| } |
| |
| public static String format( Date date ) { |
| TimeZone timeZone = TimeZone.getDefault(); |
| boolean utc = TimeZone.getTimeZone("UTC").equals(timeZone) || TimeZone.getTimeZone("GMT").equals(timeZone); |
| |
| String pattern = utc ? "yyyy-MM-dd'T'HH:mm:ss'Z'" : "yyyy-MM-dd'T'HH:mm:ssZ"; |
| SimpleDateFormat format = new SimpleDateFormat(pattern); |
| format.setTimeZone(timeZone); |
| |
| StringBuffer buffer = new StringBuffer(format.format(date)); |
| if (!utc) { |
| buffer.insert(buffer.length() - 2, ':'); |
| } |
| |
| return buffer.toString(); |
| } |
| |
| } |