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Brownies Collections complements the Java Collections Framework. GapList combines the strengths of both ArrayList and LinkedList. BigList is a list optimized for storing large number of elements. There are specialized List implementations for all primitive data types (IntGapList, IntBigList, IntObjGapList, IntObjBigList). The key collection classes offer support for keys and constraints for lists and collections (KeyList, KeyCollection, KeySet, Key1List, Key1Collection, Key1Set, Key2List, Key2Collection, Key2Set).

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/*
 * Copyright 2013 by Thomas Mauch
 *
 * 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.
 *
 * $Id: ReverseComparator.java 2923 2015-09-02 23:01:46Z origo $
 */
package org.magicwerk.brownies.collections.helper;

import java.util.Comparator;

/**
 * Reverse comparator.
 *
 * @param  type of object to compare
 *
 * @author Thomas Mauch
 * @version $Id: ReverseComparator.java 2923 2015-09-02 23:01:46Z origo $
 */
public class ReverseComparator extends SingletonComparator {
	/** Comparator to reverse */
	private Comparator comparator;

	/**
	 * Create reverse comparator.
	 *
	 * @param comparator	comparator which must be reversed
	 */
	public ReverseComparator(Comparator comparator) {
		this.comparator = comparator;
	}

    @Override
    public int compare(T key1, T key2) {
    	return comparator.compare(key2, key1);
    }

}