PredicateReaction.java

package org.andork.react;

import java.util.function.Predicate;

public class PredicateReaction<T> extends Reaction<Boolean> {
	private Reactable<? extends T> input;
	private Predicate<? super T> p;

	public PredicateReaction(Reactable<? extends T> input, Predicate<? super T> p) {
		this.p = p;
		this.input = input;
		input.bind(this);
	}

	@Override
	protected Boolean calculate() {
		return p.test(input.get());
	}
}