// Catalano Genetic Library
// The Catalano Framework
//
// Copyright © Diego Catalano, 2012-2016
// diego.catalano at live.com
//
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU Lesser General Public
//    License as published by the Free Software Foundation; either
//    version 2.1 of the License, or (at your option) any later version.
//
//    This library is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//    Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//

package Catalano.Evolutionary.Genetic.Mutation;

import Catalano.Evolutionary.Genetic.Chromosome.IChromosome;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

/**
 * Insertion Mutation.
 * 
 * Support: Binary/Permuation/Integer/Double/Float Chromosome.
 * 
 * @author Diego Catalano
 */
public class InsertionMutation implements IMutation{

    /**
     * Initializes a new instance of the InsertionMutation class.
     */
    public InsertionMutation() {}

    @Override
    public IChromosome Compute(IChromosome chromossome) {
        
        Random rand = new Random();
        
        IChromosome c = chromossome.Clone();
        
        //Random choose one position
        int pos = rand.nextInt(chromossome.getLength());
        
        //Random choose one position to insert
        int posIn = rand.nextInt(chromossome.getLength() - 1);
        
        List genes = new ArrayList<>(chromossome.getLength() - 1);
        for (int i = 0; i < chromossome.getLength(); i++)
            if(i != pos) genes.add(chromossome.getGene(i));
        
        int idx = 0;
        for (int i = 0; i < c.getLength(); i++) {
            if(i != posIn){
                c.setGene(i, genes.get(idx));
                idx++;
            }
        }
        
        c.setGene(posIn, chromossome.getGene(pos));
        return c;
        
    }
    
}
 
 

Ads help maintain this website.