DoubleTournamentSelectionPolicyHandler.java

package net.bmahe.genetics4j.core.selection;

import java.util.random.RandomGenerator;

import org.apache.commons.lang3.Validate;

import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
import net.bmahe.genetics4j.core.spec.AbstractEAExecutionContext;
import net.bmahe.genetics4j.core.spec.selection.DoubleTournament;
import net.bmahe.genetics4j.core.spec.selection.SelectionPolicy;

public class DoubleTournamentSelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {
	private final RandomGenerator randomGenerator;

	public DoubleTournamentSelectionPolicyHandler(final RandomGenerator _randomGenerator) {
		Validate.notNull(_randomGenerator);

		this.randomGenerator = _randomGenerator;
	}

	@Override
	public boolean canHandle(final SelectionPolicy selectionPolicy) {
		Validate.notNull(selectionPolicy);

		return selectionPolicy instanceof DoubleTournament;
	}

	@Override
	public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
			final AbstractEAConfiguration<T> eaConfiguration,
			final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
			final SelectionPolicy selectionPolicy) {
		Validate.notNull(selectionPolicy);
		Validate.isInstanceOf(DoubleTournament.class, selectionPolicy);

		return new DoubleTournamentSelector<T>(selectionPolicy, randomGenerator);
	}
}