001/*
002 * Copyright 2002-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.util.comparator;
018
019import java.util.Comparator;
020
021/**
022 * Comparator that adapts Comparables to the Comparator interface.
023 * Mainly for internal use in other Comparators, when supposed
024 * to work on Comparables.
025 *
026 * @author Keith Donald
027 * @since 1.2.2
028 * @param <T> the type of comparable objects that may be compared by this comparator
029 * @see Comparable
030 */
031public class ComparableComparator<T extends Comparable<T>> implements Comparator<T> {
032
033        /**
034         * A shared instance of this default comparator.
035         * @see Comparators#comparable()
036         */
037        @SuppressWarnings("rawtypes")
038        public static final ComparableComparator INSTANCE = new ComparableComparator();
039
040
041        @Override
042        public int compare(T o1, T o2) {
043                return o1.compareTo(o2);
044        }
045
046}