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


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 com.db4o.*;
24 import com.db4o.query.*;
25
26 public class HidingField {
27
28     public String JavaDoc name;
29
30     public void store() {
31         ExtendHidingField ehf = new ExtendHidingField();
32         ehf.name = "child";
33         ehf.setParentName("parent");
34         Test.store(ehf);
35     }
36
37     public void test() {
38         Query q = Test.query();
39         q.constrain(ExtendHidingField.class);
40         q.descend("name").constrain("child");
41         ObjectSet objectSet = q.execute();
42         System.out.println(objectSet.size());
43         while (objectSet.hasNext()) {
44             System.out.println(objectSet.next());
45         }
46
47         q = Test.query();
48         q.constrain(ExtendHidingField.class);
49         q.constrain(new Evaluation() {
50
51             public void evaluate(Candidate candidate) {
52                 ExtendHidingField ehf = (ExtendHidingField) candidate
53                         .getObject();
54                 candidate.include("child".equals(ehf.name));
55             }
56         });
57         objectSet = q.execute();
58         System.out.println(objectSet.size());
59         while (objectSet.hasNext()) {
60             System.out.println(objectSet.next());
61         }
62     }
63
64     public void setParentName(String JavaDoc name) {
65         this.name = name;
66     }
67
68     public String JavaDoc toString() {
69         return "HidingField " + name;
70     }
71
72     public static class ExtendHidingField extends HidingField {
73
74         public String JavaDoc name;
75
76         public String JavaDoc toString() {
77             return super.toString() + " ExtendHidingField " + name;
78         }
79     }
80 }
81
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