KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > db4o > db4ounit > common > assorted > DescendToNullFieldTestCase


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.db4ounit.common.assorted;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25
26 import db4ounit.*;
27 import db4ounit.extensions.*;
28
29
30 public class DescendToNullFieldTestCase extends AbstractDb4oTestCase{
31     
32     private static int COUNT = 2;
33
34     public static class ParentItem{
35         
36         public String JavaDoc _name;
37         
38         public ChildItem one;
39         
40         public ChildItem two;
41
42         public ParentItem(String JavaDoc name, ChildItem child1, ChildItem child2) {
43             _name = name;
44             one = child1;
45             two = child2;
46         }
47     }
48     
49     public static class ChildItem{
50         
51         public String JavaDoc _name;
52
53         public ChildItem(String JavaDoc name) {
54             _name = name;
55         }
56         
57     }
58     
59     protected void store() throws Exception JavaDoc {
60         for (int i = 0; i < COUNT; i++) {
61             store(new ParentItem("one", new ChildItem("one"), null));
62         }
63         for (int i = 0; i < COUNT; i++) {
64             store(new ParentItem("two", null, new ChildItem("two")));
65         }
66
67     }
68     
69     public void test(){
70         assertResults("one");
71         assertResults("two");
72     }
73     
74     private void assertResults(String JavaDoc name){
75         Query query = newQuery(ParentItem.class);
76         query.descend(name).descend("_name").constrain(name);
77         ObjectSet objectSet = query.execute();
78         Assert.areEqual(COUNT, objectSet.size());
79         while(objectSet.hasNext()){
80             ParentItem parentItem = (ParentItem) objectSet.next();
81             Assert.areEqual(name, parentItem._name);
82         }
83     }
84
85 }
86
Popular Tags