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Java > Open Source Codes > com > db4o > foundation > ArrayIterator4


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 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.foundation;
22
23 public class ArrayIterator4 implements Iterator4 {
24     
25     Object JavaDoc[] _elements;
26     int _next;
27
28     public ArrayIterator4(Object JavaDoc[] elements) {
29         _elements = elements;
30         _next = -1;
31     }
32
33     public boolean moveNext() {
34         if (_next < lastIndex()) {
35             ++_next;
36             return true;
37         }
38         // force exception on unexpected call to current
39
_next = _elements.length;
40         return false;
41     }
42
43     public Object JavaDoc current() {
44         return _elements[_next];
45     }
46     
47     public void reset() {
48         _next = -1;
49     }
50     
51     private int lastIndex() {
52         return _elements.length - 1;
53     }
54 }
55
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