1/*
2 * Copyright (c) 1997, 2012, 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/* @test
25 * @bug 4065313
26 * @summary Ensure that it is okay to replace an object with null.
27 */
28import java.io.*;
29
30class A { }
31
32class MyObjectOutputStream extends ObjectOutputStream {
33  public MyObjectOutputStream(OutputStream out) throws IOException {
34    super(out);
35    enableReplaceObject(true);
36  }
37  protected Object replaceObject(Object obj) throws IOException {
38    if(obj instanceof A) return null;
39    else return obj;
40  }
41}
42
43public class ReplaceWithNull {
44    public static void main(String args[]) throws IOException {
45        A a = new A();
46
47        MyObjectOutputStream out =
48            new MyObjectOutputStream(new ByteArrayOutputStream());
49        out.writeObject(a);     //raised NullPointerException.
50        out.close();
51    }
52}
53