1 /*
   2  * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /* @test
  25  * @bug 4838379
  26  * @summary Verify that serialVersionUID and serialPersistentFields
  27  *          declarations made by enum types and constants are ignored.
  28  */
  29 
  30 import java.io.*;
  31 import java.util.Arrays;
  32 
  33 enum Foo {
  34 
  35     foo,
  36     bar {
  37         private static final long serialVersionUID = 2L;
  38         // bar is implemented as an inner class instance, so the following
  39         // declaration would cause a compile-time error
  40         // private static final ObjectStreamField[] serialPersistentFields = {
  41         //    new ObjectStreamField("gub", Float.TYPE)
  42         // };
  43     };
  44 
  45     private static final long serialVersionUID = 1L;
  46     private static final ObjectStreamField[] serialPersistentFields = {
  47         new ObjectStreamField("blargh", Integer.TYPE)
  48     };
  49 }
  50 
  51 public class Test {
  52     public static void main(String[] args) throws Exception {
  53         Class[] classes =
  54             { Foo.class, Foo.foo.getClass(), Foo.bar.getClass() };
  55         for (int i = 0; i < classes.length; i++) {
  56             ObjectStreamClass desc = ObjectStreamClass.lookup(classes[i]);
  57             if (desc.getSerialVersionUID() != 0L) {
  58                 throw new Error(
  59                     classes[i] + " has non-zero serialVersionUID: " +
  60                     desc.getSerialVersionUID());
  61             }
  62             ObjectStreamField[] fields = desc.getFields();
  63             if (fields.length > 0) {
  64                 throw new Error(
  65                     classes[i] + " has non-empty list of fields: " +
  66                     Arrays.asList(fields));
  67             }
  68         }
  69     }
  70 }