DebugRegExp


1   /*
2    * DebugRegExp.java
3    *
4    * This library is free software; you can redistribute it and/or
5    * modify it under the terms of the GNU Lesser General Public License
6    * as published by the Free Software Foundation; either version 2.1
7    * of the License, or (at your option) any later version.
8    *
9    * This library is distributed in the hope that it will be useful,
10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   * Lesser General Public License for more details.
13   *
14   * You should have received a copy of the GNU Lesser General Public
15   * License along with this library; if not, write to the Free
16   * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
17   * MA 02111-1307, USA.
18   *
19   * Copyright (c) 2003-2005 Per Cederberg. All rights reserved.
20   */
21  
22  package net.percederberg.grammatica.parser.re;
23  
24  import java.io.FileReader  ;
25  
26  /**
27   * A test program for the RegExp class.
28   *
29   * @author   Per Cederberg, <per at percederberg dot net>
30   * @version  1.5
31   */
32  public class DebugRegExp {
33  
34      /**
35       * The application entry point.
36       *
37       * @param args           the command-line parameters
38       */
39      public static void main(String  [] args) {
40          char[]      buffer = new char[1024];
41          FileReader    in;
42          int         length;
43          String        str = "";
44  
45          // Check command-line arguments
46          if (args.length != 1) {
47              System.err.println("Syntax: DebugRegExp <regexpfile>");
48              System.exit(1);
49          }
50  
51          // Read file contents
52          try {
53              in = new FileReader  (args[0]);
54              length = in.read(buffer);
55              str = new String  (buffer, 0, length);
56          } catch (Exception   e) {
57              e.printStackTrace();
58              System.exit(1);
59          }
60  
61          // Create regular expression
62          try {
63              System.out.println(new RegExp(str, false));
64          } catch (RegExpException e) {
65              e.printStackTrace();
66              System.exit(1);
67          }
68      }
69  }
70
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