01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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: public class DescendToNullFieldTestCase extends AbstractDb4oTestCase {
30:
31: private static int COUNT = 2;
32:
33: public static class ParentItem {
34:
35: public String _name;
36:
37: public ChildItem one;
38:
39: public ChildItem two;
40:
41: public ParentItem(String name, ChildItem child1,
42: ChildItem child2) {
43: _name = name;
44: one = child1;
45: two = child2;
46: }
47: }
48:
49: public static class ChildItem {
50:
51: public String _name;
52:
53: public ChildItem(String name) {
54: _name = name;
55: }
56:
57: }
58:
59: protected void store() throws Exception {
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 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: }
|