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Java > Open Source Codes > com > quadcap > sql > io > ObjectInputStream


1 package com.quadcap.sql.io;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.EOFException JavaDoc;
42 import java.io.Externalizable JavaDoc;
43 import java.io.InputStream JavaDoc;
44 import java.io.InvalidClassException JavaDoc;
45 import java.io.IOException JavaDoc;
46 import java.io.ObjectInput JavaDoc;
47
48 import java.util.Vector JavaDoc;
49
50 import com.quadcap.util.Debug;
51
52 /**
53  * ObjectInputStream based on this package's serialization format.
54  *
55  * @author Stan Bailes
56  */
57 public class ObjectInputStream extends DataInputStream implements ObjectInput JavaDoc {
58     public ObjectInputStream(InputStream JavaDoc is) {
59     super(is);
60     }
61
62     public Object JavaDoc readObject() throws IOException JavaDoc, ClassNotFoundException JavaDoc {
63     int code = read();
64     if (code == 0) return null;
65     if (code == -1) {
66         throw new EOFException JavaDoc();
67     }
68     Extern ext = null;
69     try {
70         ext = Extern.get(code);
71     } catch (Throwable JavaDoc e) {
72         ext = null;
73     }
74     if (ext == null) {
75         throw new IOException JavaDoc("Corrupted stream: bad code: " + code);
76     }
77     Object JavaDoc ret = ext.readObject(this);
78         return ret;
79     }
80 }
81
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