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 /** 020 * A collection of chromosomes that facilitates generational evolution. 021 * 022 * @since 2.0 023 * @version $Revision: 800116 $ $Date: 2009-08-02 13:49:59 -0400 (Sun, 02 Aug 2009) $ 024 */ 025 public interface Population extends Iterable<Chromosome> { 026 /** 027 * Access the current population size. 028 * @return the current population size. 029 */ 030 int getPopulationSize(); 031 032 /** 033 * Access the maximum population size. 034 * @return the maximum population size. 035 */ 036 int getPopulationLimit(); 037 038 /** 039 * Start the population for the next generation. 040 * @return the beginnings of the next generation. 041 */ 042 Population nextGeneration(); 043 044 /** 045 * Add the given chromosome to the population. 046 * @param chromosome the chromosome to add. 047 */ 048 void addChromosome(Chromosome chromosome); 049 050 /** 051 * Access the fittest chromosome in this population. 052 * @return the fittest chromosome. 053 */ 054 Chromosome getFittestChromosome(); 055 }