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Dimension2Decoder.java
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Dimension2Decoder.java
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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.math4.examples.ga.mathfunctions;
import java.util.List;
import org.apache.commons.math4.ga.chromosome.AbstractListChromosome;
import org.apache.commons.math4.ga.chromosome.BinaryChromosome;
import org.apache.commons.math4.ga.decoder.AbstractListChromosomeDecoder;
/**
* Decoder to convert chromosome's binary genotype to phenotype
* {@link Coordinate}.
*/
public class Dimension2Decoder extends AbstractListChromosomeDecoder<Integer, Coordinate> {
/**
* decode the binary representation of chromosome to {@link Coordinate}.
* @param chromosome The {@link AbstractListChromosome}
*/
@Override
protected Coordinate decode(AbstractListChromosome<Integer, Coordinate> chromosome) {
final BinaryChromosome<Coordinate> binaryChromosome = (BinaryChromosome<Coordinate>) chromosome;
final List<Integer> alleles = binaryChromosome.getRepresentation();
final StringBuilder allelesStr = new StringBuilder();
for (Integer allele : alleles) {
allelesStr.append(Integer.toBinaryString(allele));
}
final double x = Integer.parseInt(allelesStr.substring(0, 12), 2) / 100.0;
final double y = Integer.parseInt(allelesStr.substring(12, 24), 2) / 100.0;
return new Coordinate(x, y);
}
}