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


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 java.util.*;
24
25 import com.db4o.*;
26 import com.db4o.foundation.*;
27
28 public class CascadeToHashtable {
29
30     public Hashtable ht;
31
32     public void configure() {
33         Db4o.configure().objectClass(this).cascadeOnUpdate(true);
34         Db4o.configure().objectClass(this).cascadeOnDelete(true);
35     }
36
37     public void store() {
38         Test.deleteAllInstances(this);
39         Test.deleteAllInstances(new Atom());
40         CascadeToHashtable cth = new CascadeToHashtable();
41         cth.ht = new Hashtable();
42         cth.ht.put("key1", new Atom("stored1"));
43         cth.ht.put("key2", new Atom(new Atom("storedChild1"), "stored2"));
44         Test.store(cth);
45     }
46
47     public void test() {
48         Test.forEach(this, new Visitor4() {
49             public void visit(Object JavaDoc obj) {
50                 CascadeToHashtable cth = (CascadeToHashtable) obj;
51                 cth.ht.put("key1", new Atom("updated1"));
52                 Atom atom = (Atom)cth.ht.get("key2");
53                 atom.name = "updated2";
54                 Test.store(cth);
55             }
56         });
57         Test.reOpen();
58         
59         Test.forEach(this, new Visitor4() {
60             public void visit(Object JavaDoc obj) {
61                 CascadeToHashtable cth = (CascadeToHashtable) obj;
62                 Atom atom = (Atom)cth.ht.get("key1");
63                 Test.ensure(atom.name.equals("updated1"));
64                 atom = (Atom)cth.ht.get("key2");
65                 Test.ensure(atom.name.equals("updated2"));
66             }
67         });
68         
69         // Cascade-On-Delete Test: We only want one atom to remain.
70
71         Test.reOpen();
72         Test.deleteAllInstances(this);
73         Test.ensureOccurrences(new Atom(), 1);
74     }
75 }
76
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