01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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 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 name) {
65: this .name = name;
66: }
67:
68: public String toString() {
69: return "HidingField " + name;
70: }
71:
72: public static class ExtendHidingField extends HidingField {
73:
74: public String name;
75:
76: public String toString() {
77: return super .toString() + " ExtendHidingField " + name;
78: }
79: }
80: }
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