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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math3.genetics;
import org.apache.commons.math3.exception.util.LocalizedFormats;
import java.util.ArrayList;
import java.util.List;
/**
* Chromosome represented by a vector of 0s and 1s.
*
* @since 2.0
*/
public abstract class BinaryChromosome extends AbstractListChromosome<Integer> {
/**
* Constructor.
*
* @param representation list of {0,1} values representing the chromosome
* @throws InvalidRepresentationException iff the <code>representation</code> can not represent
* a valid chromosome
*/
public BinaryChromosome(List<Integer> representation) throws InvalidRepresentationException {
super(representation);
}
/**
* Constructor.
*
* @param representation array of {0,1} values representing the chromosome
* @throws InvalidRepresentationException iff the <code>representation</code> can not represent
* a valid chromosome
*/
public BinaryChromosome(Integer[] representation) throws InvalidRepresentationException {
super(representation);
}
/** {@inheritDoc} */
@Override
protected void checkValidity(List<Integer> chromosomeRepresentation)
throws InvalidRepresentationException {
for (int i : chromosomeRepresentation) {
if (i < 0 || i > 1) {
throw new InvalidRepresentationException(LocalizedFormats.INVALID_BINARY_DIGIT, i);
}
}
}
/**
* Returns a representation of a random binary array of length <code>length</code>.
*
* @param length length of the array
* @return a random binary array of length <code>length</code>
*/
public static List<Integer> randomBinaryRepresentation(int length) {
// random binary list
List<Integer> rList = new ArrayList<Integer>(length);
for (int j = 0; j < length; j++) {
rList.add(GeneticAlgorithm.getRandomGenerator().nextInt(2));
}
return rList;
}
/** {@inheritDoc} */
@Override
protected boolean isSame(Chromosome another) {
// type check
if (!(another instanceof BinaryChromosome)) {
return false;
}
BinaryChromosome anotherBc = (BinaryChromosome) another;
// size check
if (getLength() != anotherBc.getLength()) {
return false;
}
for (int i = 0; i < getRepresentation().size(); i++) {
if (!(getRepresentation().get(i).equals(anotherBc.getRepresentation().get(i)))) {
return false;
}
}
// all is ok
return true;
}
}
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