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 SortedSameOrder {
27: private static class Sortable {
28: private String a;
29:
30: public Sortable(String a) {
31: this .a = a;
32: }
33:
34: public String toString() {
35: return a;
36: }
37: }
38:
39: private static class SortableComparator implements QueryComparator {
40: public int compare(Object first, Object second) {
41: return ((Sortable) first).a
42: .compareTo(((Sortable) second).a);
43: }
44: }
45:
46: public void store() {
47: Test.store(new Sortable("a"));
48: Test.store(new Sortable("c"));
49: Test.store(new Sortable("b"));
50: }
51:
52: public void test() {
53: Query query = Test.query();
54: query.constrain(Sortable.class);
55: SortableComparator cmp = new SortableComparator();
56: query.sortBy(cmp);
57: ObjectSet result = query.execute();
58:
59: Object last = null;
60: while (result.hasNext()) {
61: Object cur = result.next();
62: Test.ensure(last == null || cmp.compare(last, cur) <= 0);
63: last = cur;
64: }
65: last = null;
66: for (int i = 0; i < result.size(); i++) {
67: Object cur = result.get(i);
68: Test.ensure(last == null || cmp.compare(last, cur) <= 0);
69: last = cur;
70: }
71: }
72: }
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