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 /*
  26  * @test
  27  * @summary test reflection on value types
  28  * @compile -XDenableValueTypes Point.java
  29  * @run main/othervm -XX:+EnableValhalla Reflection
  30  */
  31 
  32 import java.lang.reflect.*;
  33 
  34 public class Reflection {
  35     public static void main(String... args) throws Exception {
  36         Reflection test = new Reflection("Point");
  37         test.newInstance();

  38         test.accessField();



  39     }
  40 
  41     private final Class<?> c;


  42     Reflection(String cn) throws Exception {
  43         this.c = Class.forName(cn);
  44         if (!c.isValue()) {
  45             throw new RuntimeException(cn + " is not a value class");
  46         }



  47     }
  48 
  49     void accessField() throws Exception {
  50         Point o = Point.origin;
  51         Field x = c.getField("x");
  52         if (x.getInt(o) != o.x) {
  53             throw new RuntimeException("Unexpected Point.x value: " +  x.getInt(o));
  54         }
  55 
  56         try {
  57             x.setInt(o, 100);
  58             throw new RuntimeException("IllegalAccessException not thrown");
  59         } catch (IllegalAccessException e) {}
  60     }
  61 
  62     void newInstance() throws Exception {
  63         if (c == null) return;
  64 
  65         try {
  66             Object o = c.newInstance();
  67             throw new RuntimeException("newInstance expected to be unsupported on value class");
  68         } catch (UnsupportedOperationException e) {}






































  69     }
  70 }
--- EOF ---