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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
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23 
24 import java.lang.invoke.MethodHandle;
25 import java.lang.invoke.MethodHandleProxies;
26 import java.lang.invoke.MethodHandles;
27 import java.lang.invoke.MethodType;
28 import java.lang.reflect.Constructor;
29 import java.lang.reflect.InvocationHandler;
30 import java.lang.reflect.InvocationTargetException;
31 
32 import org.testng.annotations.BeforeTest;
33 import org.testng.annotations.Test;
34 import static org.testng.Assert.*;
35 
36 /**
37  * @test
38  * @summary test MethodHandleProxies that adds qualified export of sun.invoke
39  * from java.base to a dynamic module
40  * @run testng ProxyForMethodHandle
41  */
42 public class ProxyForMethodHandle {
43     /**
44      * MethodHandleProxies will add qualified export of sun.invoke from java.base
45      * to a dynamic module
46      */
47     @Test
testRunnableMethodHandle()48     public static void testRunnableMethodHandle() throws Exception {
49         MethodHandles.Lookup lookup = MethodHandles.lookup();
50         MethodType mt = MethodType.methodType(void.class);
51         MethodHandle mh = lookup.findStatic(ProxyForMethodHandle.class, "runForRunnable", mt);
52         Runnable proxy = MethodHandleProxies.asInterfaceInstance(Runnable.class, mh);
53         proxy.run();
54 
55         Class<?> proxyClass = proxy.getClass();
56         Module target = proxyClass.getModule();
57         assertDynamicModule(target, proxyClass.getClassLoader(), proxyClass);
58     }
59 
runForRunnable()60     static void runForRunnable() {
61         System.out.println("runForRunnable");
62     }
63 
assertDynamicModule(Module m, ClassLoader ld, Class<?> proxyClass)64     public static void assertDynamicModule(Module m, ClassLoader ld, Class<?> proxyClass) {
65         if (!m.isNamed() || !m.getName().startsWith("jdk.proxy")) {
66             throw new RuntimeException(m.getName() + " not dynamic module");
67         }
68 
69         if (ld != m.getClassLoader() || proxyClass.getClassLoader() != ld) {
70             throw new RuntimeException("unexpected class loader");
71         }
72 
73         try {
74             Constructor<?> cons = proxyClass.getConstructor(InvocationHandler.class);
75             cons.newInstance(handler);
76             throw new RuntimeException("Expected IllegalAccessException: " + proxyClass);
77         } catch (IllegalAccessException e) {
78             // expected
79         } catch (NoSuchMethodException|InstantiationException|InvocationTargetException e) {
80             throw new RuntimeException(e);
81         }
82     }
83     private final static InvocationHandler handler =
84             (proxy, m, params) -> { throw new RuntimeException(m.toString()); };
85 }
86