01: package org.ofbiz.rules.parse;
02:
03: import org.ofbiz.rules.parse.tokens.*;
04:
05: /**
06: * <p><b>Title:</b> Show Track
07: * <p><b>Description:</b> None
08: * <p>Copyright (c) 1999 Steven J. Metsker.
09: * <p>Copyright (c) 2001 The Open For Business Project - www.ofbiz.org
10: *
11: * <p>Permission is hereby granted, free of charge, to any person obtaining a
12: * copy of this software and associated documentation files (the "Software"),
13: * to deal in the Software without restriction, including without limitation
14: * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15: * and/or sell copies of the Software, and to permit persons to whom the
16: * Software is furnished to do so, subject to the following conditions:
17: *
18: * <p>The above copyright notice and this permission notice shall be included
19: * in all copies or substantial portions of the Software.
20: *
21: * <p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22: * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
25: * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
26: * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
27: * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28: *
29: * <br>
30: * Show some examples of using a <code>Track</code>.
31: *
32: * @author Steven J. Metsker
33: * @version 1.0
34: */
35: public class ShowTrack {
36:
37: /**
38: * Return a parser that will recognize a list, for the
39: * grammar:
40: *
41: * list = '(' contents ')';
42: * contents = empty | actualList;
43: * actualList = Word (',' Word)*;
44: */
45: public static Parser list() {
46:
47: Parser empty, commaWord, actualList, contents, list;
48:
49: empty = new Empty();
50:
51: commaWord = new Track().add(new Symbol(',').discard()).add(
52: new Word());
53:
54: actualList = new Sequence().add(new Word()).add(
55: new Repetition(commaWord));
56:
57: contents = new Alternation().add(empty).add(actualList);
58:
59: list = new Track().add(new Symbol('(').discard()).add(contents)
60: .add(new Symbol(')').discard());
61:
62: return list;
63: }
64:
65: /**
66: * Show some examples of using a <code>Track</code>.
67: */
68: public static void main(String args[]) {
69:
70: Parser list = list();
71:
72: String test[] = new String[] { "()", "(pilfer)",
73: "(pilfer, pinch)", "(pilfer, pinch, purloin)",
74: "(pilfer, pinch,, purloin)", "(", "(pilfer",
75: "(pilfer, ", "(, pinch, purloin)", "pilfer, pinch" };
76:
77: System.out.println("Using parser: " + list);
78: for (int i = 0; i < test.length; i++) {
79: System.out.println("---\ntesting: " + test[i]);
80: TokenAssembly a = new TokenAssembly(test[i]);
81:
82: try {
83: Assembly out = list.completeMatch(a);
84:
85: if (out == null) {
86: System.out
87: .println("list.completeMatch() returns null");
88: } else {
89: Object s = list.completeMatch(a).getStack();
90:
91: System.out.println("Ok, stack is: " + s);
92: }
93: } catch (TrackException e) {
94: System.out.println(e.getMessage());
95: }
96: }
97: }
98: }
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