| /* |
| * 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. |
| * |
| * 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 8046171 |
| * @summary Test access to private methods between nestmates where there |
| * is an inheritance hierarchy and we invoke private methods that |
| * exist in specific classes in the hierarchy. |
| * @run main TestMethodHandlesHierarchy |
| */ |
| |
| import java.lang.invoke.*; |
| import static java.lang.invoke.MethodHandles.*; |
| import static java.lang.invoke.MethodType.*; |
| |
| public class TestMethodHandlesHierarchy { |
| |
| static final MethodType M_T = MethodType.methodType(String.class); |
| |
| static class NestedA extends ExternalSuper { |
| static final String ID = "NestedA::priv_invoke"; |
| private String priv_invoke() { |
| return ID; |
| } |
| static void checkA(NestedA a) throws Throwable { |
| MethodHandle mh = |
| lookup().findSpecial(NestedA.class, "priv_invoke", |
| M_T, NestedA.class); |
| verifyEquals((String)mh.invoke(a), NestedA.ID); |
| verifyEquals((String)mh.invokeExact(a), NestedA.ID); |
| |
| mh = lookup().findVirtual(NestedA.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(a), NestedA.ID); |
| verifyEquals((String)mh.invokeExact(a), NestedA.ID); |
| } |
| } |
| |
| static class NestedB extends NestedA { |
| static final String ID = "NestedB::priv_invoke"; |
| private String priv_invoke() { |
| return ID; |
| } |
| static void checkA(NestedA a) throws Throwable { |
| MethodHandle mh = |
| lookup().findVirtual(NestedA.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(a), NestedA.ID); |
| verifyEquals((String)mh.invokeExact(a), NestedA.ID); |
| } |
| } |
| |
| static class NestedC extends NestedB { |
| static final String ID = "NestedC::priv_invoke"; |
| private String priv_invoke() { |
| return ID; |
| } |
| static void checkA(NestedA a) throws Throwable { |
| MethodHandle mh = |
| lookup().findVirtual(NestedA.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(a), NestedA.ID); |
| verifyEquals((String)mh.invokeExact(a), NestedA.ID); |
| } |
| } |
| |
| static void checkA(NestedA a) throws Throwable { |
| MethodHandle mh = |
| lookup().findVirtual(NestedA.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(a), NestedA.ID); |
| verifyEquals((String)mh.invokeExact(a), NestedA.ID); |
| } |
| |
| static void checkB(NestedB b) throws Throwable { |
| MethodHandle mh = |
| lookup().findVirtual(NestedB.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(b), NestedB.ID); |
| verifyEquals((String)mh.invokeExact(b), NestedB.ID); |
| } |
| |
| static void checkC(NestedC c) throws Throwable { |
| MethodHandle mh = |
| lookup().findVirtual(NestedC.class, "priv_invoke", M_T); |
| verifyEquals((String)mh.invoke(c), NestedC.ID); |
| verifyEquals((String)mh.invokeExact(c), NestedC.ID); |
| } |
| |
| |
| // Access to private members of classes outside the nest is |
| // not permitted. These tests should throw IllegalAccessException |
| // at runtime. |
| |
| static void checkExternalSuper(ExternalSuper s) throws Throwable { |
| try { |
| lookup().findVirtual(ExternalSuper.class, "priv_invoke", M_T); |
| throw new Error("Unexpected access to ExternalSuper.priv_invoke"); |
| } |
| catch (IllegalAccessException iae) { |
| System.out.println("Got expected exception accessing ExternalSuper.priv_invoke:" + iae); |
| } |
| } |
| |
| static void checkExternalSub(ExternalSub s) throws Throwable { |
| try { |
| lookup().findVirtual(ExternalSub.class, "priv_invoke", M_T); |
| throw new Error("Unexpected access to ExternalSub.priv_invoke"); |
| } |
| catch (IllegalAccessException iae) { |
| System.out.println("Got expected exception accessing ExternalSub.priv_invoke:" + iae); |
| } |
| } |
| |
| static void verifyEquals(String actual, String expected) { |
| if (!actual.equals(expected)) { |
| throw new Error("Expected " + expected + " but got " + actual); |
| } |
| System.out.println("Check passed for " + expected); |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| NestedA a = new NestedA(); |
| NestedB b = new NestedB(); |
| NestedC c = new NestedC(); |
| ExternalSub sub = new ExternalSub(); |
| ExternalSuper sup = new ExternalSuper(); |
| |
| checkExternalSuper(sup); |
| checkExternalSuper(a); |
| checkExternalSuper(b); |
| checkExternalSuper(c); |
| checkExternalSuper(sub); |
| |
| checkA(a); |
| checkA(b); |
| checkA(c); |
| checkA(sub); |
| |
| NestedA.checkA(a); |
| NestedA.checkA(b); |
| NestedA.checkA(c); |
| NestedA.checkA(sub); |
| |
| NestedB.checkA(a); |
| NestedB.checkA(b); |
| NestedB.checkA(c); |
| NestedB.checkA(sub); |
| |
| NestedC.checkA(a); |
| NestedC.checkA(b); |
| NestedC.checkA(c); |
| NestedC.checkA(sub); |
| |
| checkB(b); |
| checkB(c); |
| checkB(sub); |
| |
| checkC(c); |
| checkC(sub); |
| |
| checkExternalSub(sub); |
| } |
| } |
| |
| // Classes that are not part of the nest. |
| // Being non-public allows us to declare them in this file. |
| |
| class ExternalSuper { |
| static final String ID = "ExternalSuper::priv_invoke"; |
| private String priv_invoke() { |
| return ID; |
| } |
| } |
| |
| |
| class ExternalSub extends TestMethodHandlesHierarchy.NestedC { |
| static final String ID = "ExternalSub::priv_invoke"; |
| private String priv_invoke() { |
| return ID; |
| } |
| } |