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Java > Open Source Codes > com > db4o > TreeIntObject


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o;
22
23 import com.db4o.foundation.Tree;
24
25 /**
26  * @exclude
27  */
28 public class TreeIntObject extends TreeInt {
29
30     public Object JavaDoc _object;
31
32     public TreeIntObject(int a_key) {
33         super(a_key);
34     }
35
36     public TreeIntObject(int a_key, Object JavaDoc a_object) {
37         super(a_key);
38         _object = a_object;
39     }
40
41     public Object JavaDoc shallowClone() {
42         return shallowCloneInternal(new TreeIntObject(_key));
43     }
44
45     protected Tree shallowCloneInternal(Tree tree) {
46         TreeIntObject tio = (TreeIntObject) super.shallowCloneInternal(tree);
47         tio._object = _object;
48         return tio;
49     }
50     
51     public Object JavaDoc getObject() {
52         return _object;
53     }
54     
55     public void setObject(Object JavaDoc obj) {
56         _object = obj;
57     }
58
59     public Object JavaDoc read(YapReader a_bytes) {
60         int key = a_bytes.readInt();
61         Object JavaDoc obj = null;
62         if (_object instanceof TreeInt) {
63             obj = new TreeReader(a_bytes, (Readable JavaDoc) _object).read();
64         } else {
65             obj = ((Readable JavaDoc) _object).read(a_bytes);
66         }
67         return new TreeIntObject(key, obj);
68     }
69
70     public void write(YapReader a_writer) {
71         a_writer.writeInt(_key);
72         if (_object == null) {
73             a_writer.writeInt(0);
74         } else {
75             if (_object instanceof TreeInt) {
76                 TreeInt.write(a_writer, (TreeInt) _object);
77             } else {
78                 ((ReadWriteable) _object).write(a_writer);
79             }
80         }
81     }
82
83     public int ownLength() {
84         if (_object == null) {
85             return YapConst.INT_LENGTH * 2;
86         }
87         return YapConst.INT_LENGTH + ((Readable JavaDoc) _object).byteCount();
88     }
89
90     boolean variableLength() {
91         return true;
92     }
93
94 }
95
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