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/*
 * Copyright 2013-2021 the original author or authors.
 *
 * 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 org.cloudfoundry.util.tuple;

/**
 * Represents a function that accepts four arguments and produces a result
 *
 * @param  The type of the first input to the function
 * @param  The type of the second input to the function
 * @param  The type of the third input to the function
 * @param  The type of the fourth input to the function
 * @param   the type of the result of the function
 */
@FunctionalInterface
public interface Function4 {

    /**
     * Applies this function to the given arguments
     *
     * @param t1 the first input argument
     * @param t2 the second input argument
     * @param t3 the third input argument
     * @param t4 the fourth input argument
     * @return the function result
     */
    R apply(T1 t1, T2 t2, T3 t3, T4 t4);
}