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}