SimpleSerialization.java revision 5474:43bd5ee0205e 
1/*
2 * Copyright (c) 2010, 2011, 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 * Portions Copyright (c) 2010, 2011 IBM Corporation
26 */
27
28/*
29 * @test
30 * @bug 6927486
31 * @summary A serialized Hashtable can be de-serialized properly.
32 * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com>
33 */
34
35import java.io.ByteArrayInputStream;
36import java.io.ByteArrayOutputStream;
37import java.io.ObjectInputStream;
38import java.io.ObjectOutputStream;
39import java.io.PrintWriter;
40import java.io.StringWriter;
41import java.util.Hashtable;
42import java.util.Map;
43
44public class SimpleSerialization {
45    public static void main(final String[] args) throws Exception {
46        Hashtable<String, String> h1 = new Hashtable<>();
47
48        System.err.println("*** BEGIN TEST ***");
49
50        h1.put("key", "value");
51
52        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
53        try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
54            oos.writeObject(h1);
55        }
56
57        final byte[] data = baos.toByteArray();
58        final ByteArrayInputStream bais = new ByteArrayInputStream(data);
59        final Object deserializedObject;
60        try (ObjectInputStream ois = new ObjectInputStream(bais)) {
61            deserializedObject = ois.readObject();
62        }
63
64        if(!h1.getClass().isInstance(deserializedObject)) {
65             throw new RuntimeException("Result not assignable to type of h1");
66        }
67
68        if (false == h1.equals(deserializedObject)) {
69             Hashtable<String, String> d1 = (Hashtable<String, String>) h1;
70            for(Map.Entry entry: h1.entrySet()) {
71                System.err.println("h1.key::" + entry.getKey() + " d1.containsKey()::" + d1.containsKey((String) entry.getKey()));
72                System.err.println("h1.value::" + entry.getValue() + " d1.contains()::" + d1.contains(entry.getValue()));
73                System.err.println("h1.value == d1.value " + entry.getValue().equals(d1.get((String) entry.getKey())));
74            }
75
76            throw new RuntimeException(getFailureText(h1, deserializedObject));
77        }
78    }
79
80    private static String getFailureText(final Object orig, final Object copy) {
81        final StringWriter sw = new StringWriter();
82        try (PrintWriter pw = new PrintWriter(sw)) {
83            pw.println("Test FAILED: Deserialized object is not equal to the original object");
84            pw.print("\tOriginal: ");
85            printObject(pw, orig).println();
86            pw.print("\tCopy:     ");
87            printObject(pw, copy).println();
88        }
89        return sw.toString();
90    }
91
92    private static PrintWriter printObject(final PrintWriter pw, final Object o) {
93        pw.printf("%s@%08x", o.getClass().getName(), System.identityHashCode(o));
94        return pw;
95    }
96}
97