    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.math3.genetics;
    018
    019    import 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     */
    027    public 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    }