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Java > Open Source Codes > com > db4o > test > IndexedByIdentity


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.test;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25
26 /**
27  *
28  */
29 public class IndexedByIdentity {
30     
31     public Atom atom;
32     
33     static final int COUNT = 10;
34     
35     public void configure(){
36         Db4o.configure().objectClass(this).objectField("atom").indexed(true);
37     }
38     
39     public void store(){
40         for (int i = 0; i < COUNT; i++) {
41             IndexedByIdentity ibi = new IndexedByIdentity();
42             ibi.atom = new Atom("ibi" + i);
43             Test.store(ibi);
44         }
45     }
46     
47     public void test(){
48         readAndUpdate("ibi");
49         readAndUpdate("updated");
50         
51     }
52     
53     private void readAndUpdate(String JavaDoc atomName){
54         for (int i = 0; i < COUNT; i++) {
55             Query q = Test.query();
56             q.constrain(Atom.class);
57             q.descend("name").constrain(atomName + i);
58             ObjectSet objectSet = q.execute();
59             Atom child = (Atom)objectSet.next();
60             // child.name = "rünzelbrünft";
61 q = Test.query();
62             q.constrain(IndexedByIdentity.class);
63             q.descend("atom").constrain(child).identity();
64             objectSet = q.execute();
65             Test.ensure(objectSet.size() == 1);
66             IndexedByIdentity ibi = (IndexedByIdentity)objectSet.next();
67             Test.ensure(ibi.atom == child);
68             ibi.atom = new Atom("updated" + i);
69             Test.store(ibi);
70         }
71         
72         
73     }
74     
75     
76     
77     
78 }
79
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