| /* |
| * Copyright 2009 Niclas Hedhman. |
| * |
| * Licensed 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.qi4j.api.util; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.TimeZone; |
| |
| /** |
| * Useful methods for handling Dates. |
| */ |
| public final class Dates |
| { |
| // Formatters are not thread-safe. Create one per thread |
| private static final ThreadLocal<DateFormat> ISO8601 = new ThreadLocal<DateFormat>() |
| { |
| @Override |
| protected DateFormat initialValue() |
| { |
| return new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss.SSSZ" ); |
| } |
| }; |
| |
| private static final ThreadLocal<DateFormat> ISO8601_UTC = new ThreadLocal<DateFormat>() |
| { |
| @Override |
| protected DateFormat initialValue() |
| { |
| SimpleDateFormat dateFormat = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" ); |
| dateFormat.setTimeZone( TimeZone.getTimeZone( "UTC" ) ); |
| return dateFormat; |
| } |
| }; |
| |
| /** |
| * @param stringDate a string representing a date as either ISO8601, @millis@ or /Date() formats |
| * @return a Date |
| */ |
| public static Date fromString( String stringDate ) |
| { |
| try |
| { |
| Date date = ISO8601_UTC.get().parse( stringDate ); |
| return date; |
| } |
| catch( ParseException e ) |
| { |
| try |
| { |
| Date date = ISO8601.get().parse( stringDate ); |
| return date; |
| } |
| catch( ParseException e1 ) |
| { |
| // @millis@ format |
| if( stringDate.startsWith( "@" ) && stringDate.endsWith( "@" ) ) |
| { |
| long time = Long.parseLong( stringDate.substring( 1, stringDate.length() - 1 ) ); |
| Date date = new Date( time ); |
| return date; |
| } |
| else if( stringDate.startsWith( "/Date(" ) && stringDate.endsWith( ")/" ) ) // Microsoft format |
| { |
| long time = Long.parseLong( stringDate.substring( 6, stringDate.length() - 2 ) ); |
| Date date = new Date( time ); |
| return date; |
| } |
| throw new IllegalStateException( "Illegal date:" + stringDate ); |
| } |
| } |
| } |
| |
| /** |
| * @param date a Date |
| * @return String representation in ISO8601 UTC |
| */ |
| public static String toUtcString( Date date ) |
| { |
| return ISO8601_UTC.get().format( date ); |
| } |
| |
| private Dates() |
| { |
| } |
| } |