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Java > Open Source Codes > com > db4o > TreeString


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 TreeString extends Tree {
29
30     public String JavaDoc _key;
31
32     public TreeString(String JavaDoc a_key) {
33         this._key = a_key;
34     }
35
36     protected Tree shallowCloneInternal(Tree tree) {
37         TreeString ts = (TreeString) super.shallowCloneInternal(tree);
38         ts._key = _key;
39         return ts;
40     }
41
42     public Object JavaDoc shallowClone() {
43         return shallowCloneInternal(new TreeString(_key));
44     }
45
46     public int compare(Tree a_to) {
47         return YapString
48                 .compare(YapConst.stringIO.write(((TreeString) a_to)._key),
49                         YapConst.stringIO.write(_key));
50     }
51     
52     public Object JavaDoc key(){
53         return _key;
54     }
55
56 }
57
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