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.math4.genetics; 018 019import java.util.List; 020 021/** 022 * Interface indicating that the chromosome represents a permutation of objects. 023 * 024 * @param <T> type of the permuted objects 025 * @since 2.0 026 */ 027public interface PermutationChromosome<T> { 028 029 /** 030 * Permutes the <code>sequence</code> of objects of type T according to the 031 * permutation this chromosome represents. For example, if this chromosome 032 * represents a permutation (3,0,1,2), and the unpermuted sequence is 033 * (a,b,c,d), this yields (d,a,b,c). 034 * 035 * @param sequence the unpermuted (original) sequence of objects 036 * @return permutation of <code>sequence</code> represented by this permutation 037 */ 038 List<T> decode(List<T> sequence); 039 040}