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    package org.apache.commons.math.genetics;
018    
019    /**
020     * Policy used to create a pair of new chromosomes by performing a crossover
021     * operation on a source pair of chromosomes.
022     * 
023     * @since 2.0
024     * @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
025     */
026    public interface CrossoverPolicy {
027        /**
028         * Perform a crossover operation on the given chromosomes.
029         * 
030         * @param first the first chromosome.
031         * @param second the second chromosome.
032         * @return the pair of new chromosomes that resulted from the crossover.
033         */
034        ChromosomePair crossover(Chromosome first, Chromosome second);
035    }