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Java > Open Source Codes > org > armedbear > j > PerlTagger


1 /*
2  * PerlTagger.java
3  *
4  * Copyright (C) 2000-2002 Peter Graves
5  * $Id: PerlTagger.java,v 1.1.1.1 2002/09/24 16:08:00 piso Exp $
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20  */
21
22 package org.armedbear.j;
23
24 import gnu.regexp.RE;
25 import gnu.regexp.REMatch;
26 import gnu.regexp.UncheckedRE;
27 import java.util.ArrayList JavaDoc;
28
29 public final class PerlTagger extends Tagger
30 {
31     // We trim before matching, so "sub" will appear without any preceding
32 // whitespace.
33 private static final RE subRE =
34         new UncheckedRE("^sub\\s+([a-zA-Z0-9_]+(::[a-zA-Z0-9_]+)*)");
35
36     public PerlTagger(SystemBuffer buffer)
37     {
38         super(buffer);
39     }
40
41     public void run()
42     {
43         ArrayList JavaDoc tags = new ArrayList JavaDoc();
44         Line line = buffer.getFirstLine();
45         while (line != null) {
46             String JavaDoc s = line.trim();
47             if (s != null && s.startsWith("sub")) {
48                 // Tag definitions but not declarations.
49 if (s.charAt(s.length()-1) != ';') {
50                     REMatch match = subRE.getMatch(s);
51                     if (match != null) {
52                         String JavaDoc token = s.substring(match.getSubStartIndex(1),
53                             match.getSubEndIndex(1));
54                         tags.add(new PerlTag(token, line));
55                     }
56                 }
57             }
58             line = line.next();
59         }
60         buffer.setTags(tags);
61     }
62 }
63
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