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


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.ext.*;
25 import com.db4o.query.*;
26
27
28 public class TestDescend {
29     
30     public TestDescend _child;
31     
32     public String JavaDoc _name;
33     
34     public TestDescend(){
35         
36     }
37     
38     public TestDescend(TestDescend child, String JavaDoc name){
39         _child = child;
40         _name = name;
41     }
42     
43     public void storeOne(){
44         _child = new TestDescend(new TestDescend(new TestDescend(null, "3"), "2"), "1");
45         _name = "0";
46     }
47     
48     public void test(){
49         Query q = Test.query();
50         q.constrain(this.getClass());
51         q.descend("_name").constrain("0");
52         ObjectSet objectSet = q.execute();
53         TestDescend res = (TestDescend)objectSet.next();
54         
55         ExtObjectContainer oc = Test.objectContainer();
56         
57         Object JavaDoc obj = oc.descend(res, new String JavaDoc[]{"_name"});
58         Test.ensure(obj.equals("0"));
59         
60         obj = oc.descend(res, new String JavaDoc[]{"_child", "_child", "_name"});
61         Test.ensure(obj.equals("2"));
62         
63         obj = oc.descend(res, new String JavaDoc[]{"_child", "_child", "_child", "_name"});
64         Test.ensure(obj.equals("3"));
65         
66         obj = oc.descend(res, new String JavaDoc[]{"_child", "CRAP", "_child", "_name"});
67         Test.ensure(obj == null);
68     }
69
70 }
71
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