FunctionReaction.java

package org.andork.react;

import java.util.function.Function;

public class FunctionReaction<T, R> extends Reaction<R> {
	private Reactable<? extends T> input;
	private Function<? super T, ? extends R> fn;

	public FunctionReaction(Reactable<? extends T> input, Function<? super T, ? extends R> fn) {
		this.fn = fn;
		this.input = input;
		input.bind(this);
	}

	@Override
	protected R calculate() {
		return fn.apply(input.get());
	}
}