1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.lang3.function;
19
20 import java.util.function.DoubleSupplier;
21
22 /**
23 * A functional interface like {@link DoubleSupplier} that declares a {@link Throwable}.
24 *
25 * @param <E> The kind of thrown exception or error.
26 * @since 3.11
27 */
28 @FunctionalInterface
29 public interface FailableDoubleSupplier<E extends Throwable> {
30
31 /**
32 * Supplies a double.
33 *
34 * @return a result
35 * @throws E if the supplier fails
36 */
37 double getAsDouble() throws E;
38 }