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: * A simple query node visitor, useful for examining a query tree.
37: *
38: * @author Daniel Lichtenberger (daniel.lichtenberger@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at)
39: */
40: public interface QueryNodeVisitor {
41: /**
42: * Visit an operator node, i.e. a node in the tree with
43: * a query operator (usually AND/OR).
44: *
45: * @param operatorNode the operator node visited
46: */
47: void visit(QueryOperatorNode operatorNode);
48:
49: /**
50: * Visit a value node, i.e. a leaf node with some kind of
51: * value attached.
52: *
53: * @param valueNode the value node visited
54: */
55: void visit(QueryValueNode valueNode);
56:
57: /**
58: * Sets the parent node of the visited node.
59: *
60: * @param operatorNode the parent node of the next visited node
61: */
62: void setCurrentParent(QueryOperatorNode operatorNode);
63: }
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