1 /*
   2  * Copyright (c) 2000, 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 4348213
  27  * @build UnnamedPackageSwitchTest pkg.A
  28  * @run main UnnamedPackageSwitchTest
  29  * @summary Verify that deserialization allows an incoming class descriptor
  30  *          representing a class in the unnamed package to be resolved to a
  31  *          local class with the same name in a named package, and vice-versa.
  32  */
  33 
  34 import java.io.ByteArrayInputStream;
  35 import java.io.ByteArrayOutputStream;
  36 import java.io.InputStream;
  37 import java.io.IOException;
  38 import java.io.ObjectOutputStream;
  39 import java.io.ObjectInputStream;
  40 import java.io.ObjectStreamClass;
  41 import java.io.Serializable;
  42 
  43 class A implements Serializable {
  44     private static final long serialVersionUID = 0L;
  45 }
  46 
  47 class TestObjectInputStream extends ObjectInputStream {
  48     TestObjectInputStream(InputStream in) throws IOException { super(in); }
  49     protected Class resolveClass(ObjectStreamClass desc)
  50         throws IOException, ClassNotFoundException
  51     {
  52         String name = desc.getName();
  53         if (name.equals("A")) {
  54             return pkg.A.class;
  55         } else if (name.equals("pkg.A")) {
  56             return A.class;
  57         } else {
  58             return super.resolveClass(desc);
  59         }
  60     }
  61 }
  62 
  63 public class UnnamedPackageSwitchTest {
  64     public static void main(String[] args) throws Exception {
  65         ByteArrayOutputStream bout = new ByteArrayOutputStream();
  66         ObjectOutputStream oout = new ObjectOutputStream(bout);
  67         oout.writeObject(new A());
  68         oout.writeObject(new pkg.A());
  69         oout.close();
  70 
  71         ObjectInputStream oin = new TestObjectInputStream(
  72             new ByteArrayInputStream(bout.toByteArray()));
  73         oin.readObject();
  74         oin.readObject();
  75     }
  76 }
--- EOF ---