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


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 IndexedUpdatesWithNull {
30     
31     public String JavaDoc str;
32     
33     public IndexedUpdatesWithNull(){
34     }
35     
36     public IndexedUpdatesWithNull(String JavaDoc str){
37         this.str = str;
38     }
39     
40     public void configure(){
41         Db4o.configure().objectClass(this).objectField("str").indexed(true);
42     }
43     
44     public void store(){
45         Test.store(new IndexedUpdatesWithNull("one"));
46         Test.store(new IndexedUpdatesWithNull("two"));
47         Test.store(new IndexedUpdatesWithNull("three"));
48         Test.store(new IndexedUpdatesWithNull(null));
49         Test.store(new IndexedUpdatesWithNull(null));
50         Test.store(new IndexedUpdatesWithNull(null));
51         Test.store(new IndexedUpdatesWithNull(null));
52         Test.store(new IndexedUpdatesWithNull("four"));
53     }
54     
55     public void test(){
56         expectNulls(4, true);
57         expectNulls(3, false);
58         expectNulls(2, false);
59         expectNulls(1, true);
60     }
61     
62     private void expectNulls(int count, boolean commit){
63         Query q = Test.query();
64         q.constrain(this.getClass());
65         q.descend("str").constrain(null);
66         ObjectSet objectSet = q.execute();
67         Test.ensure(objectSet.size() == count);
68         IndexedUpdatesWithNull iuwn = (IndexedUpdatesWithNull)objectSet.next();
69         iuwn.str = "hi";
70         ObjectContainer oc = Test.objectContainer();
71         oc.set(iuwn);
72         if(commit){
73             oc.commit();
74         }
75     }
76 }
77
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