Spring Framework example source code file (ComparableComparator.java)

This example Spring Framework source code file (ComparableComparator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

comparable, comparable, comparablecomparator, comparator, comparator, object, object, the, the, util

The Spring Framework ComparableComparator.java source code

/*
 * Copyright 2002-2005 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.util.comparator;

import java.util.Comparator;

import org.springframework.util.Assert;

/**
 * Comparator that adapts Comparables to the Comparator interface.
 * Mainly for internal use in other Comparators, when supposed
 * to work on Comparables.
 * 
 * @author Keith Donald
 * @since 1.2.2
 * @see Comparable
 */
public class ComparableComparator implements Comparator {

	public int compare(Object o1, Object o2) {
		Assert.isTrue(o1 instanceof Comparable, "The first object provided is not Comparable");
		Assert.isTrue(o2 instanceof Comparable, "The second object provided is not Comparable");
		return ((Comparable) o1).compareTo(o2);
	}

}