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 }