/*
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 *
 * The Original Code is Protege-2000.
 *
 * The Initial Developer of the Original Code is Stanford University. Portions
 * created by Stanford University are Copyright (C) 2007.  All Rights Reserved.
 *
 * Protege was developed by Stanford Medical Informatics
 * (http://www.smi.stanford.edu) at the Stanford University School of Medicine
 * with support from the National Library of Medicine, the National Science
 * Foundation, and the Defense Advanced Research Projects Agency.  Current
 * information about Protege can be obtained at http://protege.stanford.edu.
 *
 */

package edu.stanford.smi.protege.util;

import java.text.*;
import java.util.*;

/**
 * The formatter defines the standard way that dates/times are "stringified"
 * for storage in Protege.  The representation is meant to be simple to parse and
 * to sort.
 *
 * @author Ray Fergerson <fergerson@smi.stanford.edu>
 */
public class StandardDateFormat extends SimpleDateFormat {
    private static final String FORMAT_PATTERN = "yyyy.MM.dd HH:mm:ss.SSS zzz";
    private static final String OLD_FORMAT_PATTERN = "yyyy.MM.dd HH:mm:ss.SSS";

    private static SimpleDateFormat _oldFormat = new SimpleDateFormat(OLD_FORMAT_PATTERN);

    public StandardDateFormat() {
        super(FORMAT_PATTERN);
    }
    
    public static String now() {
        return new StandardDateFormat().format(new Date());
    }

    public Date parse(String text) throws ParseException {
        Date result;
        try {
            result = super.parse(text);
        } catch (ParseException e) {
            result = _oldFormat.parse(text);
        }
        return result;
    }
}
