UnsafeFunction.java

package maxbe.common;

import java.util.function.Function;

/**
 * Taken and extended from http://codingjunkie.net/functional-iterface-exceptions/
 *
 * @author Max Bechtold
 */
@FunctionalInterface
public interface UnsafeFunction<T, R> extends Function<T, R> {

	@Override
	default R apply(T t) {
		try {
			return applyThrows(t);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	R applyThrows(T t) throws Exception;

	/**
	 * Allows to use method references for signatures with throws-clauses in method chains of the Stream API. This works by wrapping checked exceptions in
	 * RuntimeExceptions and hiding the necessary cast to UnsafeFunction with this identity method.
	 */
	static <X, Y> UnsafeFunction<X, Y> unsafe(UnsafeFunction<X, Y> function) {
		return function;
	}
}