/*
* This file is part of JGAP.
*
* JGAP offers a dual license model containing the LGPL as well as the MPL.
*
* For licensing information please see the file license.txt included with JGAP
* or have a look at the top of class org.jgap.Chromosome which representatively
* includes the JGAP license policy applicable for any file delivered with JGAP.
*/
package org.jgap.impl;
import org.jgap.*;
/**
* Default implementation of a dynamic CrossoverRateCalculator.
*
* @author Chris Knowles
* @since 2.0
*/
public class DefaultCrossoverRateCalculator
extends BaseRateCalculator {
/** String containing the CVS revision. Read out via reflection!*/
private static final String CVS_REVISION = "$Revision: 1.9 $";
/**
*
* @param a_config the configuration to use
* @throws InvalidConfigurationException
*/
public DefaultCrossoverRateCalculator(Configuration a_config)
throws InvalidConfigurationException {
super(a_config);
}
/**
* Calculates the dynamic crossover rate. This is chosen to be the chromosome
* size. As the chromosome gets larger we assume that it is less likely to
* reproduce.
*
* @return calculated divisor of crossover rate
*
* @author Chris Knowles
* @since 2.0
*/
public int calculateCurrentRate() {
int size = getConfiguration().getChromosomeSize();
if (size < 1) {
size = 1;
}
return size;
}
/**
* Determines whether crossover is to be carried out for a given population.
*
* @param a_chrom ignored
* @param a_geneIndex ignored
*
* @return true: the DefaultCrossoverRateCalculator always returns a finite
* rate
*
* @author Chris Knowles
* @since 2.0
*/
public boolean toBePermutated(IChromosome a_chrom, int a_geneIndex) {
return true;
}
}