/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite 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 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package org.evosuite.ga.operators.crossover;
import org.evosuite.ga.Chromosome;
import org.evosuite.ga.ConstructionFailedException;
import org.evosuite.utils.Randomness;
/**
* Select one random point in each individual and cross over (TPX)
*
* @author Gordon Fraser
*/
public class SinglePointCrossOver extends CrossOverFunction {
private static final long serialVersionUID = 2881387570766261795L;
/**
* {@inheritDoc}
*
* A different splitting point is selected for each individual
*/
@Override
public void crossOver(Chromosome parent1, Chromosome parent2)
throws ConstructionFailedException {
if (parent1.size() < 2 || parent2.size() < 2) {
return;
}
// Choose a position in the middle
int point1 = Randomness.nextInt(parent1.size() - 1) + 1;
int point2 = Randomness.nextInt(parent2.size() - 1) + 1;
Chromosome t1 = parent1.clone();
Chromosome t2 = parent2.clone();
parent1.crossOver(t2, point1, point2);
parent2.crossOver(t1, point2, point1);
}
}