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.sqlParser;
34:
35: import org.apache.commons.lang.ArrayUtils;
36: import org.apache.commons.collections.iterators.ArrayIterator;
37: import org.apache.commons.collections.iterators.ObjectArrayIterator;
38:
39: import java.util.Iterator;
40:
41: /**
42: * Class holding constant values.
43: *
44: * @author Gregor Schober (gregor.schober@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at)
45: */
46: public class Constant extends Value implements Iterable {
47: public Constant(String sValue) {
48: super (sValue);
49: }
50:
51: @Override
52: public String getValue() {
53: return (String) super .getValue();
54: }
55:
56: /**
57: * Returns an iterator over this constant. A single constant will return itself,
58: * an aggregate constant value (e.g. a list of constant values) will return an iterator
59: * over its child elements.
60: *
61: * @return an iterator over this constant
62: */
63: @SuppressWarnings({"unchecked"})
64: public Iterator<Constant> iterator() {
65: return new ObjectArrayIterator(new Constant[] { this });
66: }
67: }
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