DateParser.java

/*
 * DeliciousDroid - http://code.google.com/p/DeliciousDroid/
 *
 * Copyright (C) 2010 Matt Schmidt
 *
 * DeliciousDroid is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 3 of the License,
 * or (at your option) any later version.
 *
 * DeliciousDroid is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DeliciousDroid; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package com.deliciousdroid.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

public class DateParser {
	
	public static final TimeZone tz = TimeZone.getTimeZone("GMT");
	public static final Calendar c = Calendar.getInstance(tz);
	
    public static Date parse( String input ) throws java.text.ParseException {

        //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 long parseTime( String input ) {
        c.set(IntUtils.parseUInt(input.substring(0, 4)), 
        		IntUtils.parseUInt(input.substring(5, 7)) - 1, 
        		IntUtils.parseUInt(input.substring(8, 10)), 
        		IntUtils.parseUInt(input.substring(11, 13)), 
        		IntUtils.parseUInt(input.substring(14, 16)), 
        		IntUtils.parseUInt(input.substring(17, 19)));

        return c.getTimeInMillis();  
    }
    
    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;
        
    }
}