01: package org.ofbiz.rules.parse.chars;
02:
03: import java.util.*;
04: import org.ofbiz.rules.parse.*;
05:
06: /**
07: * <p><b>Title:</b> Digit
08: * <p><b>Description:</b> None
09: * <p>Copyright (c) 1999 Steven J. Metsker.
10: * <p>Copyright (c) 2001 The Open For Business Project - www.ofbiz.org
11: *
12: * <p>Permission is hereby granted, free of charge, to any person obtaining a
13: * copy of this software and associated documentation files (the "Software"),
14: * to deal in the Software without restriction, including without limitation
15: * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16: * and/or sell copies of the Software, and to permit persons to whom the
17: * Software is furnished to do so, subject to the following conditions:
18: *
19: * <p>The above copyright notice and this permission notice shall be included
20: * in all copies or substantial portions of the Software.
21: *
22: * <p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23: * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
25: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
26: * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
27: * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
28: * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29: *
30: * <br>
31: * <p>A Digit matches a digit from a character assembly.
32: *
33: * @author Steven J. Metsker
34: * @version 1.0
35: */
36: public class Digit extends Terminal {
37:
38: /**
39: * Returns true if an assembly's next element is a digit.
40: *
41: * @param object an element from an assembly
42: * @return true, if an assembly's next element is a digit
43: */
44: public boolean qualifies(Object o) {
45: Character c = (Character) o;
46:
47: return Character.isDigit(c.charValue());
48: }
49:
50: /**
51: * Create a set with one random digit.
52: */
53: public List randomExpansion(int maxDepth, int depth) {
54: char c = (char) (10 * Math.random() + '0');
55: List v = new ArrayList();
56:
57: v.add(new String(new char[] { c }));
58: return v;
59: }
60:
61: /**
62: * Returns a textual description of this parser.
63: *
64: * @param vector a list of parsers already printed in
65: * this description
66: * @return string a textual description of this parser
67: * @see Parser#toString()
68: */
69: public String unvisitedString(List visited) {
70: return "D";
71: }
72: }
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