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-top
  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-top 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 }