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    • dk.eobjects.metamodel.util.TimeComparator Maven / Gradle / Ivy

    /**
 *  This file is part of MetaModel.
 *
 *  MetaModel 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.
 *
 *  MetaModel 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 MetaModel.  If not, see .
 */
package dk.eobjects.metamodel.util;

import java.util.Comparator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.joda.time.DateTime;

/**
 * Compares dates of various formats. Since this class has unchecked generic
 * conversion it can compare java.util.Date, java.sql.Date, java.sql.Time and
 * all the other date types supported by Joda time.
 */
public class TimeComparator implements Comparator {

	private static final Log _log = LogFactory.getLog(TimeComparator.class);
	private static Comparator _instance = new TimeComparator();

	public static Comparator getComparator() {
		return _instance;
	}

	private TimeComparator() {
	}

	public static Comparable getComparable(Object o) {
		final DateTime dt1 = new DateTime(o);
		return new Comparable() {

			public int compareTo(Object o) {
				return _instance.compare(dt1, o);
			}

			@Override
			public String toString() {
				return "TimeComparable[time=" + dt1 + "]";
			}
		};
	}

	public int compare(Object o1, Object o2) {
		try {
			DateTime dt1 = new DateTime(o1);
			DateTime dt2 = new DateTime(o2);
			return dt1.compareTo(dt2);
		} catch (Exception e) {
			_log.error(e);
			throw new RuntimeException(e);
		}
	}
}    
    
    
    

    




    
    
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