GenerationalReplacementImpl.java
package net.bmahe.genetics4j.core.replacement;
import java.util.List;
import java.util.Objects;
import org.apache.commons.lang3.Validate;
import net.bmahe.genetics4j.core.Genotype;
import net.bmahe.genetics4j.core.Population;
import net.bmahe.genetics4j.core.selection.Selector;
import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
import net.bmahe.genetics4j.core.spec.replacement.GenerationalReplacement;
public class GenerationalReplacementImpl<T extends Comparable<T>> implements ReplacementStrategyImplementor<T> {
private final GenerationalReplacement generationalReplacementSpec;
private final Selector<T> offspringSelector;
public GenerationalReplacementImpl(final GenerationalReplacement _elistismSpec,
final Selector<T> _offspringSelector) {
Objects.requireNonNull(_elistismSpec);
this.generationalReplacementSpec = _elistismSpec;
this.offspringSelector = _offspringSelector;
}
@Override
public Population<T> select(final AbstractEAConfiguration<T> eaConfiguration, final long generation,
final int numIndividuals, final List<Genotype> population, final List<T> populationScores,
final List<Genotype> offsprings, final List<T> offspringScores) {
Objects.requireNonNull(eaConfiguration);
Validate.isTrue(generation >= 0);
Validate.isTrue(numIndividuals > 0);
Objects.requireNonNull(population);
Objects.requireNonNull(populationScores);
Validate.isTrue(population.size() == populationScores.size());
Objects.requireNonNull(offsprings);
Objects.requireNonNull(offspringScores);
Validate.isTrue(offsprings.size() == offspringScores.size());
final Population<T> selected = new Population<>();
final Population<T> selectedOffspring = offspringSelector
.select(eaConfiguration, generation, numIndividuals, offsprings, offspringScores);
selected.addAll(selectedOffspring);
return selected;
}
}