--- /dev/null 2017-05-02 15:52:31.000000000 -0700 +++ new/test/java/lang/invoke/lookup/java.base/java/lang/LookupTest.java 2017-05-02 15:52:31.000000000 -0700 @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2017, 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. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * 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. + */ + +package java.lang; + +import java.lang.invoke.*; +import java.lang.invoke.MethodHandles.Lookup; +import java.lang.reflect.InvocationTargetException; + +import static java.lang.invoke.MethodType.*; + +/* + * Verify that a Lookup object can be obtained statically from java.base + * but fails when it's obtained via reflection from java.base. + */ +public class LookupTest { + public static void main(String... args) throws Throwable { + // Get a full power lookup + Lookup lookup1 = MethodHandles.lookup(); + MethodHandle mh1 = lookup1.findStatic(lookup1.lookupClass(), + "foo", + methodType(String.class)); + assertEquals((String) mh1.invokeExact(), foo()); + + // access protected member + MethodHandle mh2 = lookup1.findVirtual(java.lang.ClassLoader.class, + "getPackage", + methodType(Package.class, String.class)); + ClassLoader loader = ClassLoader.getPlatformClassLoader(); + Package pkg = (Package)mh2.invokeExact(loader, "java.lang"); + assertEquals(pkg.getName(), "java.lang"); + + // MethodHandles.lookup will fail if it's called reflectively + try { + MethodHandles.class.getMethod("lookup").invoke(null); + } catch (InvocationTargetException e) { + if (!(e.getCause() instanceof IllegalArgumentException)) { + throw e.getCause(); + } + } + } + + static String foo() { return "foo!"; } + + static void assertEquals(Object o1, Object o2) { + if (!o1.equals(o2)) { + throw new RuntimeException(o1 + " != " + o2); + } + } +}