| /* |
| * Copyright (c) 2014, 2015, 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 |
| * @run testng VarHandleTestReflection |
| */ |
| |
| import org.testng.annotations.DataProvider; |
| import org.testng.annotations.Test; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandleInfo; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.VarHandle; |
| import java.lang.reflect.Method; |
| import java.util.stream.Stream; |
| |
| public class VarHandleTestReflection extends VarHandleBaseTest { |
| String string; |
| |
| @DataProvider |
| public static Object[][] accessModesProvider() { |
| return Stream.of(VarHandle.AccessMode.values()). |
| map(am -> new Object[]{am}). |
| toArray(Object[][]::new); |
| } |
| |
| static VarHandle handle() throws Exception { |
| return MethodHandles.lookup(). |
| findVarHandle(VarHandleTestReflection.class, "string", String.class); |
| } |
| |
| @Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class) |
| public void methodInvocation(VarHandle.AccessMode accessMode) throws Exception { |
| VarHandle v = handle(); |
| |
| // Try a reflective invoke using a Method |
| |
| Method vhm = VarHandle.class.getMethod(accessMode.methodName(), Object[].class); |
| vhm.invoke(v, new Object[]{}); |
| } |
| |
| @Test(dataProvider = "accessModesProvider", expectedExceptions = UnsupportedOperationException.class) |
| public void methodHandleInvoke(VarHandle.AccessMode accessMode) throws Throwable { |
| VarHandle v = handle(); |
| |
| // Try a reflective invoke using a MethodHandle |
| |
| MethodHandle mh = MethodHandles.lookup().unreflect( |
| VarHandle.class.getMethod(accessMode.methodName(), Object[].class)); |
| // Use invoke to avoid WrongMethodTypeException for |
| // non-signature-polymorphic return types |
| Object o = (Object) mh.invoke(v, new Object[]{}); |
| } |
| |
| @Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class) |
| public void methodInvocationFromMethodInfo(VarHandle.AccessMode accessMode) throws Exception { |
| VarHandle v = handle(); |
| |
| // Try a reflective invoke using a Method obtained from cracking |
| // a MethodHandle |
| |
| MethodHandle mh = MethodHandles.lookup().unreflect( |
| VarHandle.class.getMethod(accessMode.methodName(), Object[].class)); |
| MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh); |
| Method im = info.reflectAs(Method.class, MethodHandles.lookup()); |
| im.invoke(v, new Object[]{}); |
| } |
| |
| @Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class) |
| public void reflectAsFromVarHandleInvoker(VarHandle.AccessMode accessMode) throws Exception { |
| VarHandle v = handle(); |
| |
| MethodHandle mh = MethodHandles.varHandleInvoker( |
| accessMode, v.accessModeType(accessMode)); |
| |
| MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh); |
| |
| info.reflectAs(Method.class, MethodHandles.lookup()); |
| } |
| |
| @Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class) |
| public void reflectAsFromFindVirtual(VarHandle.AccessMode accessMode) throws Exception { |
| VarHandle v = handle(); |
| |
| MethodHandle mh = MethodHandles.publicLookup().findVirtual( |
| VarHandle.class, accessMode.methodName(), v.accessModeType(accessMode)); |
| |
| MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh); |
| |
| info.reflectAs(Method.class, MethodHandles.lookup()); |
| } |
| } |