zkoss/zk

/*    Comparables.java


    Purpose:
    Description:
    History:
        2001/11/23, Henri Chen: Created.


Copyright (C) 2001 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
    This program is distributed under LGPL Version 2.1 in the hope that
    it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/

package org.zkoss.lang;

/**
 * Utilities regarding Comparable type objects.
 *
 * @author henrichen
 */
public final class Comparables {
    /**
     * Given two comparables, return the minimum of the two.
     * Note that the two Comparable must be with compatible type, or a
     * ClassCastException might be thrown.
     */
    @SuppressWarnings("unchecked")
    public static final Comparable min(Comparable a, Comparable b) {
        return  (a.compareTo(b) < 0) ? a : b;
    }

    /**
     * Given two comparables, return the maximum of the two.
     * Note that the two Comparable must be with compatible type, or a
     * ClassCastException might be thrown.
     */
    @SuppressWarnings("unchecked")
    public static final Comparable max(Comparable a, Comparable b) {
        return  (a.compareTo(b) < 0) ? b : a;
    }
}