test/hotspot/jtreg/runtime/Nestmates/privateStaticFields/TestReflection.java
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8010319: Implementation of JEP 181: Nest-Based Access Control Reviewed-by: alanb, psandoz, mchung, coleenp, acorn, mcimadamore, forax, jlahoda, sspitsyn, abuckley Contributed-by: alex.buckley@oracle.com, maurizio.mimadamore@oracle.com, mandy.chung@oracle.com, tobias.hartmann@oracle.com, david.holmes@oracle.com, vladimir.x.ivanov@oracle.com, karen.kinnear@oracle.com, vladimir.kozlov@oracle.com, john.r.rose@oracle.com, daniel.smith@oracle.com, serguei.spitsyn@oracle.com, kumardotsrinivasan@gmail.com, boris.ulasevich@bell-sw.com
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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 static fields between nestmates and nest-host
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 *          using different flavours of named nested types using core reflection
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 * @run main TestReflection
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 */
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import java.lang.reflect.Field;
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public class TestReflection {
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    // private static field of nest-host for nestmates to access
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    private static int priv_field;
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    // public constructor so we aren't relying on private access
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    public TestReflection() {}
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    // Methods that will access private static fields of nestmates
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    // NOTE: No InnerNested calls in this test because non-static nested types
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    // can't have static fields. Also no StaticIface calls as static interface
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    // fields must be public (and final)
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    void access_priv(TestReflection o) throws Throwable {
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        Field f = o.getClass().getDeclaredField("priv_field");
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        priv_field = f.getInt(null);
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        f.setInt(null, 2);
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    }
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    void access_priv(StaticNested o) throws Throwable {
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        Field f = o.getClass().getDeclaredField("priv_field");
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        priv_field = f.getInt(null);
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        f.setInt(null, 2);
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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 static fields of nestmates
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        default void access_priv(TestReflection o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            int priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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        default void access_priv(StaticNested o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            int priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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    }
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    static class StaticNested {
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        private static 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 static fields of nestmates
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        void access_priv(TestReflection o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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        void access_priv(StaticNested o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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    }
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    class InnerNested {
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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(TestReflection o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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        void access_priv(StaticNested o) throws Throwable {
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            Field f = o.getClass().getDeclaredField("priv_field");
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            priv_field = f.getInt(null);
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            f.setInt(null, 2);
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        }
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    }
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    public static void main(String[] args) throws Throwable {
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        TestReflection o = new TestReflection();
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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 TestReflection());
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        o.access_priv(s);
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        s.access_priv(o);
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        s.access_priv(new StaticNested());
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        i.access_priv(o);
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        i.access_priv(s);
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        intf.access_priv(o);
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        intf.access_priv(s);
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    }
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}