1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 8046171

    27  * @summary Test access to private static fields between nestmates and nest-host

    28  *          using different flavours of named nested types using core reflection

    29  * @run main TestReflection

    30  */

    31 

    32 import java.lang.reflect.Field;

    33 

    34 public class TestReflection {

    35 

    36     // private static field of nest-host for nestmates to access

    37     private static int priv_field;

    38 

    39     // public constructor so we aren't relying on private access

    40     public TestReflection() {}

    41 

    42     // Methods that will access private static fields of nestmates

    43 

    44     // NOTE: No InnerNested calls in this test because non-static nested types

    45     // can't have static fields. Also no StaticIface calls as static interface

    46     // fields must be public (and final)

    47 

    48     void access_priv(TestReflection o) throws Throwable {

    49         Field f = o.getClass().getDeclaredField("priv_field");

    50         priv_field = f.getInt(null);

    51         f.setInt(null, 2);

    52     }

    53     void access_priv(StaticNested o) throws Throwable {

    54         Field f = o.getClass().getDeclaredField("priv_field");

    55         priv_field = f.getInt(null);

    56         f.setInt(null, 2);

    57     }

    58 

    59     // The various nestmates

    60 

    61     static interface StaticIface {

    62 

    63         // Methods that will access private static fields of nestmates

    64 

    65         default void access_priv(TestReflection o) throws Throwable {

    66             Field f = o.getClass().getDeclaredField("priv_field");

    67             int priv_field = f.getInt(null);

    68             f.setInt(null, 2);

    69         }

    70         default void access_priv(StaticNested o) throws Throwable {

    71             Field f = o.getClass().getDeclaredField("priv_field");

    72             int priv_field = f.getInt(null);

    73             f.setInt(null, 2);

    74         }

    75     }

    76 

    77     static class StaticNested {

    78 

    79         private static int priv_field;

    80 

    81         // public constructor so we aren't relying on private access

    82         public StaticNested() {}

    83 

    84         // Methods that will access private static fields of nestmates

    85 

    86         void access_priv(TestReflection o) throws Throwable {

    87             Field f = o.getClass().getDeclaredField("priv_field");

    88             priv_field = f.getInt(null);

    89             f.setInt(null, 2);

    90         }

    91         void access_priv(StaticNested o) throws Throwable {

    92             Field f = o.getClass().getDeclaredField("priv_field");

    93             priv_field = f.getInt(null);

    94             f.setInt(null, 2);

    95         }

    96     }

    97 

    98     class InnerNested {

    99 

   100         // public constructor so we aren't relying on private access

   101         public InnerNested() {}

   102 

   103         void access_priv(TestReflection o) throws Throwable {

   104             Field f = o.getClass().getDeclaredField("priv_field");

   105             priv_field = f.getInt(null);

   106             f.setInt(null, 2);

   107         }

   108         void access_priv(StaticNested o) throws Throwable {

   109             Field f = o.getClass().getDeclaredField("priv_field");

   110             priv_field = f.getInt(null);

   111             f.setInt(null, 2);

   112         }

   113     }

   114 

   115     public static void main(String[] args) throws Throwable {

   116         TestReflection o = new TestReflection();

   117         StaticNested s = new StaticNested();

   118         InnerNested i = o.new InnerNested();

   119         StaticIface intf = new StaticIface() {};

   120 

   121         o.access_priv(new TestReflection());

   122         o.access_priv(s);

   123 

   124         s.access_priv(o);

   125         s.access_priv(new StaticNested());

   126 

   127         i.access_priv(o);

   128         i.access_priv(s);

   129 

   130         intf.access_priv(o);

   131         intf.access_priv(s);

   132     }

   133 }