| /* |
| * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 7196190 |
| * @summary Improve method of handling MethodHandles |
| * |
| * @run main/othervm ClassForNameTest |
| */ |
| |
| import java.lang.invoke.*; |
| import java.lang.reflect.Method; |
| import java.util.Arrays; |
| |
| public class ClassForNameTest { |
| static final String NAME = ClassForNameTest.class.getName(); |
| |
| public static void main(String[] args) throws Throwable { |
| { |
| final MethodType mt = MethodType.methodType(Class.class, String.class); |
| final MethodHandle mh = MethodHandles.lookup() |
| .findStatic(Class.class, "forName", mt); |
| |
| Class.forName(NAME); |
| |
| mh.invoke(NAME); |
| mh.bindTo(NAME).invoke(); |
| mh.invokeWithArguments(Arrays.asList(NAME)); |
| mh.invokeWithArguments(NAME); |
| Class cls = (Class) mh.invokeExact(NAME); |
| } |
| |
| { |
| final Method fnMethod = Class.class.getMethod("forName", String.class); |
| final MethodType mt = MethodType.methodType(Object.class, Object.class, Object[].class); |
| final MethodHandle mh = MethodHandles.lookup() |
| .findVirtual(Method.class, "invoke", mt) |
| .bindTo(fnMethod); |
| |
| fnMethod.invoke(null, NAME); |
| |
| mh.bindTo(null).bindTo(new Object[]{NAME}).invoke(); |
| mh.invoke(null, new Object[]{NAME}); |
| mh.invokeWithArguments(null, new Object[]{NAME}); |
| mh.invokeWithArguments(Arrays.asList(null, new Object[]{NAME})); |
| Object obj = mh.invokeExact((Object) null, new Object[]{NAME}); |
| } |
| |
| { |
| final Method fnMethod = Class.class.getMethod("forName", String.class); |
| final MethodType mt = MethodType.methodType(Object.class, Object.class, Object[].class); |
| |
| final MethodHandle mh = MethodHandles.lookup() |
| .bind(fnMethod, "invoke", mt); |
| |
| mh.bindTo(null).bindTo(new Object[]{NAME}).invoke(); |
| mh.invoke(null, new Object[]{NAME}); |
| mh.invokeWithArguments(null, NAME); |
| mh.invokeWithArguments(Arrays.asList(null, NAME)); |
| Object obj = mh.invokeExact((Object) null, new Object[]{NAME}); |
| } |
| |
| { |
| final Method fnMethod = Class.class.getMethod("forName", String.class); |
| final MethodHandle mh = MethodHandles.lookup().unreflect(fnMethod); |
| |
| mh.bindTo(NAME).invoke(); |
| mh.invoke(NAME); |
| mh.invokeWithArguments(NAME); |
| mh.invokeWithArguments(Arrays.asList(NAME)); |
| Class cls = (Class) mh.invokeExact(NAME); |
| } |
| |
| System.out.println("TEST PASSED"); |
| } |
| } |