de.terministic.serein.core.genome.recombination.UniformCrossover.java Source code

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Here is the source code for de.terministic.serein.core.genome.recombination.UniformCrossover.java

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/**
 * Copyright (C) 2015 Tobias Uhlig (tobias.uhlig@unibw.de)
 *
 * Licensed 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 de.terministic.serein.core.genome.recombination;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import org.apache.commons.math3.exception.OutOfRangeException;

import de.terministic.serein.core.genome.ListGenome;

public class UniformCrossover<G extends ListGenome<?>> extends PairRecombination<G> {

    final double dominance;

    public UniformCrossover(double dominance) {
        if (dominance < 0.0 || dominance > 1.0)
            throw new OutOfRangeException(dominance, 0.0, 1.0);
        this.dominance = dominance;
    }

    public UniformCrossover() {
        this(0.5);
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Override
    G recombine(G g1, G g2, Random random) {
        List result = new ArrayList();
        for (int i = 0; i < g1.size(); i++) {
            if (random.nextDouble() < dominance) {
                result.add(g1.getGenes().get(i));
            } else {
                result.add(g2.getGenes().get(i));
            }
        }
        return (G) g1.createInstance(result);
    }

}