Consumers.java

package common;

import java.util.function.Consumer;
import java.util.function.Function;

public class Consumers {

	
	/**
	* <pre>
	*Stream.of(new Point(1, 2), new Point(2, 3))
	*
	*  // write
	*  Optional.ofNullable(properties.getProperty("enabled")).ifPresent(call(button::setEnabled,Boolean::valueOf));
	*
	*  // instead of
	*  Optional.ofNullable(properties.getProperty("enabled")).ifPresent(prop -> button.setEnabled(Boolean.valueOf(prop)));
	* </pre>
	*/
	public static <U, T> Consumer<T> call(Consumer<U> consumer, Function<T, U> mapping) {
		return (tmp)-> consumer.accept(mapping.apply(tmp));
	}

}