2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
34 import java.util.Iterator;
35 import java.util.List;
36 import java.util.Vector;
38 public class CachingRewindableIterator implements RewindableIterator {
39 private Iterator master;
40 private List cachedItems;
41 private int iterationPosition;
43 public CachingRewindableIterator(Iterator anIterator) {
45 cachedItems = new Vector();
46 iterationPosition = 0;
49 public boolean hasNext() {
50 return iterationPosition<cachedItems.size() || master.hasNext();
53 public Object next() {
56 if (iterationPosition>=cachedItems.size()) {
57 cachedItems.add(master.next());
60 result = cachedItems.get(iterationPosition);
66 public void remove() {
67 throw new UnsupportedOperationException();
70 public void rewind() {