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.ext.*;
25: import com.db4o.query.*;
26:
27: public class PeekPersisted {
28:
29: public String name;
30:
31: public PeekPersisted child;
32:
33: public void storeOne() {
34: PeekPersisted current = this ;
35: current.name = "1";
36: for (int i = 2; i < 11; i++) {
37: current.child = new PeekPersisted();
38: current.child.name = "" + i;
39: current = current.child;
40: }
41: }
42:
43: public void test() {
44: Query q = Test.query();
45: q.constrain(PeekPersisted.class);
46: q.descend("name").constrain("1");
47: ObjectSet objectSet = q.execute();
48: PeekPersisted pp = (PeekPersisted) objectSet.next();
49: for (int i = 0; i < 10; i++) {
50: peek(pp, i);
51: }
52: }
53:
54: private void peek(PeekPersisted original, int depth) {
55: ExtObjectContainer oc = Test.objectContainer();
56: PeekPersisted peeked = (PeekPersisted) oc.peekPersisted(
57: original, depth, true);
58: Test.ensure(peeked != null);
59: Test.ensure(!oc.isStored(peeked));
60: for (int i = 0; i <= depth; i++) {
61: Test.ensure(peeked != null);
62: Test.ensure(!oc.isStored(peeked));
63: peeked = peeked.child;
64: }
65: Test.ensure(peeked == null);
66: }
67:
68: }
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