1 /*
2  * Copyright (c) 2001, 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 4431318
26  * @summary Verify that when serialVersionUID is declared with a type other
27  *          than long, values that can be promoted to long will be used, and
28  *          those that can't be will be ignored (but will not result in
29  *          unchecked exceptions).
30  */
31 
32 import java.io.*;
33 
34 class Z implements Serializable {
35     private static final boolean serialVersionUID = false;
36 }
37 
38 class B implements Serializable {
39     private static final byte serialVersionUID = 5;
40 }
41 
42 class C implements Serializable {
43     private static final char serialVersionUID = 5;
44 }
45 
46 class S implements Serializable {
47     private static final short serialVersionUID = 5;
48 }
49 
50 class I implements Serializable {
51     private static final int serialVersionUID = 5;
52 }
53 
54 class F implements Serializable {
55     private static final float serialVersionUID = 5.0F;
56 }
57 
58 class D implements Serializable {
59     private static final double serialVersionUID = 5.0;
60 }
61 
62 class L implements Serializable {
63     private static final Object serialVersionUID = "5";
64 }
65 
66 
67 public class BadSerialVersionUID {
main(String[] args)68     public static void main(String[] args) throws Exception {
69         Class[] ignore = { Z.class, F.class, D.class, L.class };
70         Class[] convert = { B.class, C.class, S.class, I.class };
71 
72         for (int i = 0; i < ignore.length; i++) {
73             ObjectStreamClass.lookup(ignore[i]).getSerialVersionUID();
74         }
75         for (int i = 0; i < convert.length; i++) {
76             ObjectStreamClass desc = ObjectStreamClass.lookup(convert[i]);
77             if (desc.getSerialVersionUID() != 5L) {
78                 throw new Error();
79             }
80         }
81     }
82 }
83