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 * Algorithm used to select a chromosome pair from a population.
023 *
024 * @since 2.0
025 * @version $Id: SelectionPolicy.java 1416643 2012-12-03 19:37:14Z tn $
026 */
027public interface SelectionPolicy {
028    /**
029     * Select two chromosomes from the population.
030     * @param population the population from which the chromosomes are choosen.
031     * @return the selected chromosomes.
032     * @throws MathIllegalArgumentException if the population is not compatible with this {@link SelectionPolicy}
033     */
034    ChromosomePair select(Population population) throws MathIllegalArgumentException;
035}