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
020/**
021 * A functional interface like {@link java.util.concurrent.Callable} that declares a {@link Throwable}.
022 *
023 * @param <R> Return type.
024 * @param <E> The kind of thrown exception or error.
025 * @since 3.11
026 */
027@FunctionalInterface
028public interface FailableCallable<R, E extends Throwable> {
029
030    /**
031     * Calls the callable.
032     *
033     * @return The value returned from the callable
034     * @throws E if the callable fails
035     */
036    R call() throws E;
037}