277 lines
11 KiB
Java
277 lines
11 KiB
Java
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/*
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* Copyright (c) 2017, 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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* @bug 8046171
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* @summary Test access to private fields between nestmates and nest-host
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* using different flavours of named nested types using MethodHandles
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* @run main TestMethodHandles
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*/
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import java.lang.invoke.*;
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import static java.lang.invoke.MethodHandles.*;
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public class TestMethodHandles {
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// Private field of nest-host for nestmates to access
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private int priv_field;
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// public constructor so we aren't relying on private access
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public TestMethodHandles() {}
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// Methods that will access private fields of nestmates
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// NOTE: No StaticIface variants as interfaces can't have instance fields
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void access_priv(TestMethodHandles o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, new StaticNested()); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, new StaticNested()); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(InnerNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(StaticNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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// The various nestmates
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static interface StaticIface {
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// Methods that will access private fields of nestmates
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default void access_priv(TestMethodHandles o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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int priv_field = (int) mh.invoke(o);
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priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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default void access_priv(InnerNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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int priv_field = (int) mh.invoke(o);
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priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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default void access_priv(StaticNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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int priv_field = (int) mh.invoke(o);
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priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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}
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static class StaticNested {
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private int priv_field;
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// public constructor so we aren't relying on private access
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public StaticNested() {}
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// Methods that will access private fields of nestmates
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void access_priv(TestMethodHandles o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(InnerNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(StaticNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, new TestMethodHandles()); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, new TestMethodHandles()); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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}
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class InnerNested {
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private int priv_field;
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// public constructor so we aren't relying on private access
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public InnerNested() {}
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void access_priv(TestMethodHandles o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(InnerNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, new StaticNested()); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, new StaticNested()); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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void access_priv(StaticNested o) throws Throwable {
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MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class);
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this.priv_field = (int) mh.invoke(o);
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this.priv_field = (int) mh.invokeExact(o);
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checkBadInvokeG(mh, this); // wrong nestmate
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checkBadInvokeG(mh, mh); // completely wrong type
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mh = lookup().findSetter(o.getClass(), "priv_field", int.class);
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mh.invoke(o, 2);
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mh.invokeExact(o, 3);
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checkBadInvokeS(mh, this); // wrong nestmate
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checkBadInvokeS(mh, mh); // completely wrong type
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}
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}
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static void checkBadInvokeG(MethodHandle mh, Object o) throws Throwable {
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try {
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int x = (int) mh.invoke(o);
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throw new Error("Invoke on MethodHandle " + mh + " with receiver "
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+ o + "should have failed with ClassCastException!");
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}
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catch (ClassCastException expected) {
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System.out.println("invoke got expected exception: " + expected);
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}
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}
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static void checkBadInvokeS(MethodHandle mh, Object o) throws Throwable {
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try {
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mh.invoke(o, 42);
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throw new Error("Invoke on MethodHandle " + mh + " with receiver "
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+ o + "should have failed with ClassCastException!");
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}
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catch (ClassCastException expected) {
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System.out.println("invoke got expected exception: " + expected);
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}
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}
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public static void main(String[] args) throws Throwable {
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TestMethodHandles o = new TestMethodHandles();
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StaticNested s = new StaticNested();
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InnerNested i = o.new InnerNested();
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StaticIface intf = new StaticIface() {};
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o.access_priv(new TestMethodHandles());
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o.access_priv(i);
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o.access_priv(s);
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s.access_priv(o);
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s.access_priv(i);
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s.access_priv(new StaticNested());
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i.access_priv(o);
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i.access_priv(o.new InnerNested());
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i.access_priv(s);
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intf.access_priv(o);
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intf.access_priv(i);
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intf.access_priv(s);
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}
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}
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