/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.tools.math.optimization.ec.es;
import java.util.LinkedList;
import java.util.List;
/**
* Performs a very elitist selection by just adding the best individual for k
* times.
*
* @author Ingo Mierswa
* @version $Id: ElitistSelection.java,v 1.3 2008/05/09 19:23:17 ingomierswa Exp $
*/
public class ElitistSelection implements PopulationOperator {
private int popSize = 1;
public ElitistSelection(int popSize) {
this.popSize = popSize;
}
public void operate(Population population) {
List<Individual> newGeneration = new LinkedList<Individual>();
for (int i = 0; i < this.popSize; i++) {
if (population.getBestEver() != null) {
newGeneration.add((Individual) population.getBestEver().clone());
} else {
newGeneration.add((Individual) population.get(0).clone());
}
}
population.clear();
population.addAll(newGeneration);
}
}