jdk/test/java/lang/invoke/VarHandles/VarHandleTestReflection.java
changeset 36934 590fc47a0aeb
child 37343 35a2231828a7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/invoke/VarHandles/VarHandleTestReflection.java	Thu Mar 24 11:21:21 2016 +0100
@@ -0,0 +1,114 @@
+/*
+ * 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.name(), 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.name(), 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.name(), 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.name(), v.accessModeType(accessMode));
+
+        MethodHandleInfo info = MethodHandles.lookup().revealDirect(mh);
+
+        info.reflectAs(Method.class, MethodHandles.lookup());
+    }
+}