/**
* @param aChromosome
* @return double adjusted fitness for aChromosome relative to this specie
* @throws IllegalArgumentException if chromosome is not a member if this specie
*/
public double getChromosomeFitnessValue(Chromosome aChromosome) {
if (aChromosome.getFitnessValue() < 0)
throw new IllegalArgumentException(
"chromosome's fitness has not been set: " + aChromosome.toString());
if (chromosomes.contains(aChromosome) == false)
throw new IllegalArgumentException(
"chromosome not a member of this specie: " + aChromosome.toString());
return ((double) aChromosome.getFitnessValue()) / chromosomes.size();
}
/**
* @return average raw fitness (i.e., not adjusted for specie size) of all chromosomes in specie
*/
public double getFitnessValue() {
long totalRawFitness = 0;
Iterator iter = chromosomes.iterator();
while (iter.hasNext()) {
Chromosome aChromosome = (Chromosome) iter.next();
if (aChromosome.getFitnessValue() < 0)
throw new IllegalStateException(
"chromosome's fitness has not been set: " + aChromosome.toString());
totalRawFitness += aChromosome.getFitnessValue();
}
return (double) totalRawFitness / chromosomes.size();
}