be.objectify.deadbolt.java.utils.QuadFunction Maven / Gradle / Ivy
/*
* Copyright 2010-2016 Steve Chaloner
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package be.objectify.deadbolt.java.utils;
import java.util.Objects;
import java.util.function.Function;
/**
* @author Steve Chaloner ([email protected])
*/
@FunctionalInterface
public interface QuadFunction
{
/**
* Applies this function to the given arguments.
*
* @param t the first function argument
* @param u the second function argument
* @param v the third function argument
* @param w the fourth function argument
* @return the function result
*/
R apply(T t,
U u,
V v,
W w);
/**
* Returns a composed function that first applies this function to
* its input, and then applies the {@code after} function to the result.
* If evaluation of either function throws an exception, it is relayed to
* the caller of the composed function.
*
* @param the type of output of the {@code after} function, and of the
* composed function
* @param after the function to apply after this function is applied
* @return a composed function that first applies this function and then
* applies the {@code after} function
* @throws NullPointerException if after is null
*/
default QuadFunction andThen(Function after)
{
Objects.requireNonNull(after);
return (T t, U u, V v, W w) -> after.apply(apply(t, u, v, w));
}
}