    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    import java.util.List;
    020
    021    /**
    022     * Interface indicating that the chromosome represents a permutation of objects.
    023     *
    024     * @param <T>
    025     *            type of the permuted objects
    026     * @since 2.0
    027     * @version $Revision: 811786 $ $Date: 2009-09-06 11:36:08 +0200 (dim. 06 sept. 2009) $
    028     */
    029    public interface PermutationChromosome<T> {
    030
    031        /**
    032         * Permutes the <code>sequence</code> of objects of type T according to the
    033         * permutation this chromosome represents. For example, if this chromosome
    034         * represents a permutation (3,0,1,2), and the unpermuted sequence is
    035         * (a,b,c,d), this yields (d,a,b,c).
    036         *
    037         * @param sequence
    038         *            the unpermuted (original) sequence of objects
    039         * @return permutation of <code>sequence</code> represented by this
    040         *         permutation
    041         */
    042        List<T> decode(List<T> sequence);
    043
    044    }