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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.common;

/**
 * Represents a function that accepts three arguments and produces a result.
 *
 * @param  the type of the first argument
 * @param  the type of the second argument
 * @param  the type of the third argument
 * @param  the return type
 */
@FunctionalInterface
public interface TriFunction {
    /**
     * Applies this function to the given arguments.
     *
     * @param s the first function argument
     * @param t the second function argument
     * @param u the third function argument
     * @return the result
     */
    R apply(S s, T t, U u);
}