    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *     http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.jxpath.util;
    019
    020import java.io.Serializable;
    021import java.util.Comparator;
    022
    023/**
    024 * Reverse comparator.
    025 */
    026public final class ReverseComparator implements Comparator, Serializable {
    027
    028    private static final long serialVersionUID = -2795475743948616649L;
    029    /**
    030     * Singleton reverse comparator instance.
    031     */
    032    public static final Comparator INSTANCE = new ReverseComparator();
    033
    034    /**
    035     * Constructs a new ReverseComparator.
    036     */
    037    private ReverseComparator() {
    038    }
    039
    040    @Override
    041    public int compare(final Object o1, final Object o2) {
    042        return ((Comparable) o2).compareTo(o1);
    043    }
    044}