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 MultiLevelIndex {
27:
28: public MultiLevelIndex _child;
29: public int _i;
30: public int _level;
31:
32: public void configure() {
33: Db4o.configure().objectClass(this ).objectField("_child")
34: .indexed(true);
35: Db4o.configure().objectClass(this ).objectField("_i").indexed(
36: true);
37: }
38:
39: public void store() {
40: Test.deleteAllInstances(this );
41: store1(3);
42: store1(2);
43: store1(5);
44: store1(1);
45: for (int i = 6; i < 103; i++) {
46: store1(i);
47: }
48: }
49:
50: private void store1(int val) {
51: MultiLevelIndex root = new MultiLevelIndex();
52: root._i = val;
53: root._child = new MultiLevelIndex();
54: root._child._level = 1;
55: root._child._i = -val;
56: Test.store(root);
57: }
58:
59: public void test() {
60: Query q = Test.query();
61: q.constrain(MultiLevelIndex.class);
62: q.descend("_child").descend("_i").constrain(new Integer(-102));
63: long start = System.currentTimeMillis();
64: ObjectSet objectSet = q.execute();
65: long stop = System.currentTimeMillis();
66: long duration = stop - start;
67: System.out.println("MultiLevelIndex time: " + duration + "ms");
68:
69: Test.ensure(objectSet.size() == 1);
70: MultiLevelIndex mli = (MultiLevelIndex) objectSet.next();
71: Test.ensure(mli._i == 102);
72:
73: }
74:
75: }
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