01: /***************************************************************
02: * This file is part of the [fleXive](R) project.
03: *
04: * Copyright (c) 1999-2008
05: * UCS - unique computing solutions gmbh (http://www.ucs.at)
06: * All rights reserved
07: *
08: * The [fleXive](R) project is free software; you can redistribute
09: * it and/or modify it under the terms of the GNU General Public
10: * License as published by the Free Software Foundation;
11: * either version 2 of the License, or (at your option) any
12: * later version.
13: *
14: * The GNU General Public License can be found at
15: * http://www.gnu.org/copyleft/gpl.html.
16: * A copy is found in the textfile GPL.txt and important notices to the
17: * license from the author are found in LICENSE.txt distributed with
18: * these libraries.
19: *
20: * This library is distributed in the hope that it will be useful,
21: * but WITHOUT ANY WARRANTY; without even the implied warranty of
22: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23: * GNU General Public License for more details.
24: *
25: * For further information about UCS - unique computing solutions gmbh,
26: * please see the company website: http://www.ucs.at
27: *
28: * For further information about [fleXive](R), please see the
29: * project website: http://www.flexive.org
30: *
31: *
32: * This copyright notice MUST APPEAR in all copies of the file!
33: ***************************************************************/package com.flexive.shared.search.query;
34:
35: /**
36: * Query tree node visitor that returns the maximum
37: * ID of the tree.
38: *
39: * @author Daniel Lichtenberger (daniel.lichtenberger@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at)
40: */
41: public class MaxNodeIdVisitor implements QueryNodeVisitor {
42: private int maxId = -1;
43:
44: /** {@inheritDoc} */
45: public void setCurrentParent(QueryOperatorNode operatorNode) {
46: // ignore
47: }
48:
49: /** {@inheritDoc} */
50: public void visit(QueryOperatorNode operatorNode) {
51: maxId = Math.max(maxId, operatorNode.getId());
52: }
53:
54: /** {@inheritDoc} */
55: public void visit(QueryValueNode valueNode) {
56: maxId = Math.max(maxId, valueNode.getId());
57: }
58:
59: public int getMaxId() {
60: return maxId;
61: }
62: }
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