/*
* Artificial Intelligence for Humans
* Volume 2: Nature Inspired Algorithms
* Java Version
* http://www.aifh.org
* http://www.jeffheaton.com
*
* Code repository:
* https://github.com/jeffheaton/aifh
*
* Copyright 2014 by Jeff Heaton
*
* 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.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package com.heatonresearch.aifh.genetic.species;
import com.heatonresearch.aifh.AIFHError;
import com.heatonresearch.aifh.evolutionary.genome.Genome;
import com.heatonresearch.aifh.evolutionary.species.ThresholdSpeciation;
import com.heatonresearch.aifh.genetic.genome.ArrayGenome;
import com.heatonresearch.aifh.genetic.genome.DoubleArrayGenome;
import com.heatonresearch.aifh.genetic.genome.IntegerArrayGenome;
public class ArraySpeciation<T extends ArrayGenome> extends ThresholdSpeciation {
@Override
public double getCompatibilityScore(final Genome genome1, final Genome genome2) {
if (genome1 instanceof DoubleArrayGenome) {
return scoreDouble(genome1, genome2);
} else if (genome1 instanceof IntegerArrayGenome) {
return scoreInt(genome1, genome2);
} else {
throw new AIFHError("This speciation does not support: " + genome1.getClass().getName());
}
}
private double scoreInt(final Genome genome1, final Genome genome2) {
IntegerArrayGenome intGenome1 = (IntegerArrayGenome) genome1;
IntegerArrayGenome intGenome2 = (IntegerArrayGenome) genome2;
double sum = 0;
for (int i = 0; i < intGenome1.size(); i++) {
double diff = intGenome1.getData()[i] - intGenome2.getData()[i];
sum += diff * diff;
}
return Math.sqrt(sum);
}
private double scoreDouble(final Genome genome1, final Genome genome2) {
DoubleArrayGenome doubleGenome1 = (DoubleArrayGenome) genome1;
DoubleArrayGenome doubleGenome2 = (DoubleArrayGenome) genome2;
double sum = 0;
for (int i = 0; i < doubleGenome1.size(); i++) {
double diff = doubleGenome1.getData()[i] - doubleGenome2.getData()[i];
sum += diff * diff;
}
return Math.sqrt(sum);
}
}