| /* |
| * 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 fields between nestmates and nest-host |
| * using different flavours of named nested types using MethodHandles |
| * @run main TestMethodHandles |
| */ |
| |
| import java.lang.invoke.*; |
| import static java.lang.invoke.MethodHandles.*; |
| |
| public class TestMethodHandles { |
| |
| // Private field of nest-host for nestmates to access |
| private int priv_field; |
| |
| // public constructor so we aren't relying on private access |
| public TestMethodHandles() {} |
| |
| // Methods that will access private fields of nestmates |
| |
| // NOTE: No StaticIface variants as interfaces can't have instance fields |
| |
| void access_priv(TestMethodHandles o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, new StaticNested()); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, new StaticNested()); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(InnerNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(StaticNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| |
| // The various nestmates |
| |
| static interface StaticIface { |
| |
| // Methods that will access private fields of nestmates |
| |
| default void access_priv(TestMethodHandles o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| int priv_field = (int) mh.invoke(o); |
| priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| default void access_priv(InnerNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| int priv_field = (int) mh.invoke(o); |
| priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| default void access_priv(StaticNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| int priv_field = (int) mh.invoke(o); |
| priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| } |
| |
| static class StaticNested { |
| |
| private int priv_field; |
| |
| // public constructor so we aren't relying on private access |
| public StaticNested() {} |
| |
| // Methods that will access private fields of nestmates |
| |
| void access_priv(TestMethodHandles o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(InnerNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(StaticNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, new TestMethodHandles()); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, new TestMethodHandles()); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| } |
| |
| class InnerNested { |
| |
| private int priv_field; |
| |
| // public constructor so we aren't relying on private access |
| public InnerNested() {} |
| |
| void access_priv(TestMethodHandles o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(InnerNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, new StaticNested()); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, new StaticNested()); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| void access_priv(StaticNested o) throws Throwable { |
| MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
| this.priv_field = (int) mh.invoke(o); |
| this.priv_field = (int) mh.invokeExact(o); |
| checkBadInvokeG(mh, this); // wrong nestmate |
| checkBadInvokeG(mh, mh); // completely wrong type |
| |
| mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
| mh.invoke(o, 2); |
| mh.invokeExact(o, 3); |
| checkBadInvokeS(mh, this); // wrong nestmate |
| checkBadInvokeS(mh, mh); // completely wrong type |
| } |
| } |
| |
| static void checkBadInvokeG(MethodHandle mh, Object o) throws Throwable { |
| try { |
| int x = (int) mh.invoke(o); |
| throw new Error("Invoke on MethodHandle " + mh + " with receiver " |
| + o + "should have failed with ClassCastException!"); |
| } |
| catch (ClassCastException expected) { |
| System.out.println("invoke got expected exception: " + expected); |
| } |
| } |
| |
| static void checkBadInvokeS(MethodHandle mh, Object o) throws Throwable { |
| try { |
| mh.invoke(o, 42); |
| throw new Error("Invoke on MethodHandle " + mh + " with receiver " |
| + o + "should have failed with ClassCastException!"); |
| } |
| catch (ClassCastException expected) { |
| System.out.println("invoke got expected exception: " + expected); |
| } |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| TestMethodHandles o = new TestMethodHandles(); |
| StaticNested s = new StaticNested(); |
| InnerNested i = o.new InnerNested(); |
| StaticIface intf = new StaticIface() {}; |
| |
| o.access_priv(new TestMethodHandles()); |
| o.access_priv(i); |
| o.access_priv(s); |
| |
| s.access_priv(o); |
| s.access_priv(i); |
| s.access_priv(new StaticNested()); |
| |
| i.access_priv(o); |
| i.access_priv(o.new InnerNested()); |
| i.access_priv(s); |
| |
| intf.access_priv(o); |
| intf.access_priv(i); |
| intf.access_priv(s); |
| } |
| } |
