1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package libcore.util;
18 
19 import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
20 
21 import android.annotation.SystemApi;
22 
23 /**
24  * Provides a hacky method that always throws {@code t} even if {@code t} is a checked exception.
25  * and is not declared to be thrown.
26  *
27  * See
28  * http://www.mail-archive.com/javaposse@googlegroups.com/msg05984.html
29  *
30  * @hide
31  */
32 @SystemApi(client = MODULE_LIBRARIES)
33 public class SneakyThrow {
34 
SneakyThrow()35     private SneakyThrow() {
36     }
37 
38     /**
39      * A hacky method that always throws {@code t} even if {@code t} is a checked exception,
40      * and is not declared to be thrown.
41      *
42      * @param t throwable to throw
43      *
44      * @hide
45      */
46     @SystemApi(client = MODULE_LIBRARIES)
sneakyThrow(@onNull Throwable t)47     public static void sneakyThrow(@NonNull Throwable t) {
48         SneakyThrow.<RuntimeException>sneakyThrow_(t);
49     }
50 
sneakyThrow_(Throwable t)51     private static <T extends Throwable> void sneakyThrow_(Throwable t) throws T {
52        throw (T) t;
53     }
54 }
55