/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tinkerpop.gremlin.util.function;
import java.util.Objects;
import java.util.function.Function;
/**
* @author Marko A. Rodriguez (http://markorodriguez.com)
*/
public interface TriFunction<A, B, C, R> {
/**
* Applies this function to the given arguments.
*
* @param a the first argument to the function
* @param b the second argument to the function
* @param c the third argument to the function
* @return the function result
*/
public R apply(final A a, final B b, final C c);
/**
* Returns a composed function that first applies this function to its input, and then applies the after function
* to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed
* function.
*
* @param after the function to apply after this function is applied
* @param <V> the type of the output of the {@code after} function, and of the composed function
* @return a composed function that first applies this function and then applies the {@code after} function.
* @throws NullPointerException if {@code after} is null
*/
public default <V> TriFunction<A, B, C, V> andThen(final Function<? super R, ? extends V> after) {
Objects.requireNonNull(after);
return (A a, B b, C c) -> after.apply(apply(a, b, c));
}
}