/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 * Other names may be trademarks of their respective owners.]
 *
 * (C) Copyright 2012, by Michael Clarke and Contributors.
 *
 * Original Author:  Michael Clarke;
 *
 */

package org.jfree.chart.axis;

import java.io.Serializable;
import java.util.Comparator;

public class NumberComparator implements Comparator<Number>, Serializable {

    @Override
    public int compare(Number o1, Number o2) {
        if (o1 == null) {
            if (o2 == null) {
                return 0;
            }
            return 1;
        }
        if (o2 == null) {
            return -1;
        }
        return ((Double) o1.doubleValue()).compareTo(o2.doubleValue());
    }
}
