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


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 CascadeToVector {
29
30     public Vector vec;
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         CascadeToVector ctv = new CascadeToVector();
41         ctv.vec = new Vector();
42         ctv.vec.addElement(new Atom("stored1"));
43         ctv.vec.addElement(new Atom(new Atom("storedChild1"), "stored2"));
44         Test.store(ctv);
45     }
46
47     public void test() {
48
49         Test.forEach(this, new Visitor4() {
50             public void visit(Object JavaDoc obj) {
51                 CascadeToVector ctv = (CascadeToVector) obj;
52                 Enumeration i = ctv.vec.elements();
53                 while(i.hasMoreElements()){
54                     Atom atom = (Atom) i.nextElement();
55                     atom.name = "updated";
56                     if(atom.child != null){
57                         // This one should NOT cascade
58 atom.child.name = "updated";
59                     }
60                 }
61                 Test.store(ctv);
62             }
63         });
64         Test.reOpen();
65         
66         Test.forEach(this, new Visitor4() {
67             public void visit(Object JavaDoc obj) {
68                 CascadeToVector ctv = (CascadeToVector) obj;
69                 Enumeration i = ctv.vec.elements();
70                 while(i.hasMoreElements()){
71                     Atom atom = (Atom) i.nextElement();
72                     Test.ensure(atom.name.equals("updated"));
73                     if(atom.child != null){
74                         Test.ensure( ! atom.child.name.equals("updated"));
75                     }
76                 }
77             }
78         });
79         
80         
81         // Cascade-On-Delete Test: We only want one atom to remain.
82
83         Test.reOpen();
84         Test.deleteAllInstances(this);
85         Test.ensureOccurrences(new Atom(), 1);
86     }
87 }
88
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