gistfile1.txt

package buflo.util

import org.apache.commons.lang.time.FastDateFormat;
//import org.joda.time.format.ISO8601DateFormat;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
/*
 * Copyright 1999,2004 The Apache Software Foundation.
 *
 * 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.
 */

/**
 * ISO 8601 date parsing utility.  Designed for parsing the ISO subset used in
 * Dublin Core, RSS 1.0, and Atom.
 *
 * @author <a href="mailto:burton@apache.org">Kevin A. Burton (burtonator)</a>
 * @version $Id: ISO8601DateParser.java,v 1.2 2005/06/03 20:25:29 snoopdave Exp $
 */
public class ISO8601DateParser {

	// 2004-06-14T19:GMT20:30Z
	// 2004-06-20T06:GMT22:01Z

	// http://www.cl.cam.ac.uk/~mgk25/iso-time.html
	//
	// http://www.intertwingly.net/wiki/pie/DateTime
	//
	// http://www.w3.org/TR/NOTE-datetime
	//
	// Different standards may need different levels of granularity in the date and
	// time, so this profile defines six levels. Standards that reference this
	// profile should specify one or more of these granularities. If a given
	// standard allows more than one granularity, it should specify the meaning of
	// the dates and times with reduced precision, for example, the result of
	// comparing two dates with different precisions.

	// The formats are as follows. Exactly the components shown here must be
	// present, with exactly this punctuation. Note that the "T" appears literally
	// in the string, to indicate the beginning of the time element, as specified in
	// ISO 8601.

	//    Year:
	//       YYYY (eg 1997)
	//    Year and month:
	//       YYYY-MM (eg 1997-07)
	//    Complete date:
	//       YYYY-MM-DD (eg 1997-07-16)
	//    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)

	// where:

	//      YYYY = four-digit year
	//      MM   = two-digit month (01=January, etc.)
	//      DD   = two-digit day of month (01 through 31)
	//      hh   = two digits of hour (00 through 23) (am/pm NOT allowed)
	//      mm   = two digits of minute (00 through 59)
	//      ss   = two digits of second (00 through 59)
	//      s    = one or more digits representing a decimal fraction of a second
	//      TZD  = time zone designator (Z or +hh:mm or -hh:mm)
	public static Date parse( String input ) throws java.text.ParseException {

		DateTimeFormatter df = ISODateTimeFormat.dateTime();
		return df.parseDateTime(input).toDate();

		//NOTE: SimpleDateFormat uses GMT[-+]hh:mm for the TZ which breaks
		//things a bit.  Before we go on we have to repair this.
	   /* SimpleDateFormat df = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ssz" );
		
		//this is zero time so we need to add that TZ indicator for
		if ( input.endsWith( "Z" ) ) {
			input = input.substring( 0, input.length() - 1) + "GMT-00:00";
		} else {
			int inset = 6;
		
			String s0 = input.substring( 0, input.length() - inset );
			String s1 = input.substring( input.length() - inset, input.length() );

			input = s0 + "GMT" + s1;
		}
		
		return df.parse( input );*/
		
	}

	public static String toString( Date date ) {
		
		SimpleDateFormat df = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ssz" );
		
		TimeZone tz = TimeZone.getTimeZone( "UTC" );
		
		df.setTimeZone( tz );

		String output = df.format( date );

		int inset0 = 9;
		int inset1 = 6;
		
		String s0 = output.substring( 0, output.length() - inset0 );
		String s1 = output.substring( output.length() - inset1, output.length() );

		String result = s0 + s1;

		result = result.replaceAll( "UTC", "+00:00" );
		
		return result;
		
	}


	public static void main(String[] args) throws ParseException {
		//System.out.println(FastDateFormat.getInstance("yyyy-MM-dd'T'HH:mm:ss'Z'", TimeZone.getTimeZone("GMT"), Locale.US).format(new Date()));
		System.out.println(parse("2010-07-14T16:15:52.256-03:00"));
	}

}