KickJava   Java API By Example, From Geeks To Geeks.

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


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.ObjectSet;
24 import com.db4o.config.Configuration;
25
26 import db4ounit.Assert;
27 import db4ounit.extensions.AbstractDb4oTestCase;
28
29 public class ReAddCascadedDeleteTestCase extends AbstractDb4oTestCase {
30     
31     public static void main(String JavaDoc[] args) {
32         new ReAddCascadedDeleteTestCase().runClientServer();
33     }
34     
35     public static class Item {
36         
37         public String JavaDoc _name;
38         
39         public Item _member;
40         
41         public Item() {
42         }
43
44         public Item(String JavaDoc name) {
45             _name = name;
46         }
47
48         public Item(String JavaDoc name, Item member) {
49             _name = name;
50             _member = member;
51         }
52     }
53     
54     protected void configure(Configuration config){
55         config.objectClass(Item.class).cascadeOnDelete(true);
56     }
57     
58     protected void store() {
59         db().set(new Item("parent", new Item("child")));
60     }
61     
62     public void testDeletingAndReaddingMember() throws Exception JavaDoc{
63         deleteParentAndReAddChild();
64         
65         reopen();
66         
67         Assert.isNotNull(query("child"));
68         Assert.isNull(query("parent"));
69     }
70
71     private void deleteParentAndReAddChild() {
72         Item i = query("parent");
73         db().delete(i);
74         db().set(i._member);
75         db().commit();
76     }
77     
78     private Item query(String JavaDoc name){
79         ObjectSet objectSet = db().get(new Item(name));
80         if (!objectSet.hasNext()) {
81             return null;
82         }
83         return (Item) objectSet.next();
84     }
85 }
86
Popular Tags