Raymond | dee0849 | 2015-04-02 10:43:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | * contributor license agreements. See the NOTICE file distributed with |
| 4 | * this work for additional information regarding copyright ownership. |
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | * (the "License"); you may not use this file except in compliance with |
| 7 | * the License. You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | package org.apache.commons.math.genetics; |
| 18 | |
| 19 | import java.util.ArrayList; |
| 20 | import java.util.List; |
| 21 | |
| 22 | |
| 23 | /** |
| 24 | * Chromosome represented by a vector of 0s and 1s. |
| 25 | * |
| 26 | * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ |
| 27 | * @since 2.0 |
| 28 | */ |
| 29 | public abstract class BinaryChromosome extends AbstractListChromosome<Integer> { |
| 30 | |
| 31 | /** |
| 32 | * Constructor. |
| 33 | * @param representation list of {0,1} values representing the chromosome |
| 34 | */ |
| 35 | public BinaryChromosome(List<Integer> representation) { |
| 36 | super(representation); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Constructor. |
| 41 | * @param representation array of {0,1} values representing the chromosome |
| 42 | */ |
| 43 | public BinaryChromosome(Integer[] representation) { |
| 44 | super(representation); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * {@inheritDoc} |
| 49 | */ |
| 50 | @Override |
| 51 | protected void checkValidity(List<Integer> chromosomeRepresentation) throws InvalidRepresentationException { |
| 52 | for (int i : chromosomeRepresentation) { |
| 53 | if (i < 0 || i >1) |
| 54 | throw new InvalidRepresentationException("Elements can be only 0 or 1."); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Returns a representation of a random binary array of length <code>length</code>. |
| 60 | * @param length length of the array |
| 61 | * @return a random binary array of length <code>length</code> |
| 62 | */ |
| 63 | public static List<Integer> randomBinaryRepresentation(int length) { |
| 64 | // random binary list |
| 65 | List<Integer> rList= new ArrayList<Integer> (length); |
| 66 | for (int j=0; j<length; j++) { |
| 67 | rList.add(GeneticAlgorithm.getRandomGenerator().nextInt(2)); |
| 68 | } |
| 69 | return rList; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * {@inheritDoc} |
| 74 | */ |
| 75 | @Override |
| 76 | protected boolean isSame(Chromosome another) { |
| 77 | // type check |
| 78 | if (! (another instanceof BinaryChromosome)) |
| 79 | return false; |
| 80 | BinaryChromosome anotherBc = (BinaryChromosome) another; |
| 81 | // size check |
| 82 | if (getLength() != anotherBc.getLength()) |
| 83 | return false; |
| 84 | |
| 85 | for (int i=0; i< getRepresentation().size(); i++) { |
| 86 | if (!(getRepresentation().get(i).equals(anotherBc.getRepresentation().get(i)))) |
| 87 | return false; |
| 88 | } |
| 89 | // all is ok |
| 90 | return true; |
| 91 | } |
| 92 | } |