001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.lang3.function;
019
020import java.util.function.DoubleBinaryOperator;
021
022/**
023 * A functional interface like {@link DoubleBinaryOperator} that declares a {@code Throwable}.
024 *
025 * @param <E> Thrown exception.
026 * @since 3.11
027 */
028@FunctionalInterface
029public interface FailableDoubleBinaryOperator<E extends Throwable> {
030
031    /**
032     * Applies this operator to the given operands.
033     *
034     * @param left the first operand
035     * @param right the second operand
036     * @return the operator result
037     * @throws E if the operation fails
038     */
039    double applyAsDouble(double left, double right) throws E;
040}