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 05:36:08 -0400 (Sun, 06 Sep 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 }