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


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 CascadeToHashMap {
29
30     HashMap hm;
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         CascadeToHashMap cth = new CascadeToHashMap();
41         cth.hm = new HashMap();
42         cth.hm.put("key1", new Atom("stored1"));
43         cth.hm.put("key2", new Atom(new Atom("storedChild1"), "stored2"));
44         Test.store(cth);
45     }
46
47     public void test() {
48
49         Test.forEach(this, new Visitor4() {
50             public void visit(Object JavaDoc obj) {
51                 CascadeToHashMap cth = (CascadeToHashMap) obj;
52                 cth.hm.put("key1", new Atom("updated1"));
53                 Atom atom = (Atom)cth.hm.get("key2");
54                 atom.name = "updated2";
55                 Test.store(cth);
56             }
57         });
58         Test.reOpen();
59         
60         Test.forEach(this, new Visitor4() {
61             public void visit(Object JavaDoc obj) {
62                 CascadeToHashMap cth = (CascadeToHashMap) obj;
63                 Atom atom = (Atom)cth.hm.get("key1");
64                 Test.ensure(atom.name.equals("updated1"));
65                 atom = (Atom)cth.hm.get("key2");
66                 Test.ensure(atom.name.equals("updated2"));
67             }
68         });
69         
70         // Cascade-On-Delete Test: We only want one atom to remain.
71
72         Test.reOpen();
73         Test.deleteAllInstances(this);
74         Test.ensureOccurrences(new Atom(), 1);
75     }
76 }
77
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