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 */
017package org.apache.commons.math3.genetics;
018
019import org.apache.commons.math3.exception.MathIllegalArgumentException;
020
021/**
022 * Policy used to create a pair of new chromosomes by performing a crossover
023 * operation on a source pair of chromosomes.
024 *
025 * @since 2.0
026 */
027public interface CrossoverPolicy {
028
029    /**
030     * Perform a crossover operation on the given chromosomes.
031     *
032     * @param first the first chromosome.
033     * @param second the second chromosome.
034     * @return the pair of new chromosomes that resulted from the crossover.
035     * @throws MathIllegalArgumentException if the given chromosomes are not compatible with this {@link CrossoverPolicy}
036     */
037    ChromosomePair crossover(Chromosome first, Chromosome second) throws MathIllegalArgumentException;
038}