134 lines
5.3 KiB
Java
134 lines
5.3 KiB
Java
/*
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* Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @run testng VarHandleTestReflection
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*/
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandleInfo;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.VarHandle;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.stream.Stream;
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public class VarHandleTestReflection extends VarHandleBaseTest {
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String string;
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@DataProvider
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public static Object[][] accessModesProvider() {
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return Stream.of(VarHandle.AccessMode.values()).
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map(am -> new Object[]{am}).
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toArray(Object[][]::new);
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}
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static VarHandle handle() throws Exception {
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return MethodHandles.lookup().
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findVarHandle(VarHandleTestReflection.class, "string", String.class);
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}
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@Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class)
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public void methodInvocationArgumentMismatch(VarHandle.AccessMode accessMode) throws Exception {
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VarHandle v = handle();
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// Try a reflective invoke using a Method, with no arguments
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Method vhm = VarHandle.class.getMethod(accessMode.methodName(), Object[].class);
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vhm.invoke(v, new Object[]{});
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}
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@Test(dataProvider = "accessModesProvider")
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public void methodInvocationMatchingArguments(VarHandle.AccessMode accessMode) throws Exception {
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VarHandle v = handle();
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// Try a reflective invoke using a Method, with the minimal required arguments
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Method vhm = VarHandle.class.getMethod(accessMode.methodName(), Object[].class);
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Object arg = new Object[0];
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try {
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vhm.invoke(v, arg);
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} catch (InvocationTargetException e) {
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if (!(e.getCause() instanceof UnsupportedOperationException)) {
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throw new RuntimeException("expected UnsupportedOperationException but got: "
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+ e.getCause().getClass().getName(), e);
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}
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}
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}
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@Test(dataProvider = "accessModesProvider", expectedExceptions = UnsupportedOperationException.class)
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public void methodHandleInvoke(VarHandle.AccessMode accessMode) throws Throwable {
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VarHandle v = handle();
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// Try a reflective invoke using a MethodHandle
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MethodHandle mh = MethodHandles.lookup().unreflect(
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VarHandle.class.getMethod(accessMode.methodName(), Object[].class));
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// Use invoke to avoid WrongMethodTypeException for
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// non-signature-polymorphic return types
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Object o = (Object) mh.invoke(v, new Object[]{});
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}
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@Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class)
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public void methodInvocationFromMethodInfo(VarHandle.AccessMode accessMode) throws Exception {
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VarHandle v = handle();
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// Try a reflective invoke using a Method obtained from cracking
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// a MethodHandle
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MethodHandle mh = MethodHandles.lookup().unreflect(
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VarHandle.class.getMethod(accessMode.methodName(), Object[].class));
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MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh);
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Method im = info.reflectAs(Method.class, MethodHandles.lookup());
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im.invoke(v, new Object[]{});
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}
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@Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class)
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public void reflectAsFromVarHandleInvoker(VarHandle.AccessMode accessMode) throws Exception {
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VarHandle v = handle();
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MethodHandle mh = MethodHandles.varHandleInvoker(
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accessMode, v.accessModeType(accessMode));
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MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh);
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info.reflectAs(Method.class, MethodHandles.lookup());
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}
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@Test(dataProvider = "accessModesProvider", expectedExceptions = IllegalArgumentException.class)
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public void reflectAsFromFindVirtual(VarHandle.AccessMode accessMode) throws Exception {
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VarHandle v = handle();
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MethodHandle mh = MethodHandles.publicLookup().findVirtual(
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VarHandle.class, accessMode.methodName(), v.accessModeType(accessMode));
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MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh);
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info.reflectAs(Method.class, MethodHandles.lookup());
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}
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}
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