1 /*
2  * Copyright (C) 2021 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 import java.io.File;
18 import java.lang.reflect.InvocationHandler;
19 import java.lang.reflect.Method;
20 
21 public class Main {
main(String[] args)22   public static void main(String[] args) throws Exception {
23     System.loadLibrary(args[0]);
24     init();
25     appendToBootClassLoader(DEX_EXTRA, /* isCorePlatform */ false);
26 
27     Class<?> klass = Object.class.getClassLoader().loadClass("MyClass");
28     Method m = klass.getDeclaredMethod("futureHidden");
29     Integer result = (Integer) m.invoke(null);
30     if (result.intValue() != 42) {
31       throw new Error("Expected 42, got " + result.intValue());
32     }
33   }
34 
35   private static final String DEX_EXTRA = new File(System.getenv("DEX_LOCATION"),
36       "822-hiddenapi-future-ex.jar").getAbsolutePath();
37 
init()38   private static native void init();
appendToBootClassLoader(String dexPath, boolean isCorePlatform)39   private static native void appendToBootClassLoader(String dexPath, boolean isCorePlatform);
40 }
41