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.db4ounit.util;
22:
23: public class PermutingTestConfig {
24:
25: private Object[][] _values;
26: private int[] _indices;
27: private boolean _started;
28:
29: public PermutingTestConfig(Object[][] values) {
30: _values = values;
31: _indices = new int[_values.length];
32: _started = false;
33: }
34:
35: public boolean moveNext() {
36: if (!_started) {
37: _started = true;
38: return true;
39: }
40: for (int groupIdx = _indices.length - 1; groupIdx >= 0; groupIdx--) {
41: if (_indices[groupIdx] < _values[groupIdx].length - 1) {
42: _indices[groupIdx]++;
43: for (int resetGroupIdx = groupIdx + 1; resetGroupIdx < _indices.length; resetGroupIdx++) {
44: _indices[resetGroupIdx] = 0;
45: }
46: return true;
47: }
48: }
49: return false;
50: }
51:
52: public Object current(int groupIdx) throws IllegalStateException,
53: IllegalArgumentException {
54: if (!_started) {
55: throw new IllegalStateException();
56: }
57: if (groupIdx < 0 || groupIdx >= _indices.length) {
58: throw new IllegalArgumentException();
59: }
60: return _values[groupIdx][_indices[groupIdx]];
61: }
62: }
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