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1
20
21 package com.tonicsystems.jarjar;
22
23 import java.io.*;
24 import java.util.*;
25
26 class RulesFileParser
27 {
28 private RulesFileParser() {
29 }
30
31 public static List parse(File file) throws IOException {
32 return parse(new FileReader(file));
33 }
34
35 public static List parse(String  value) throws IOException {
36 return parse(new java.io.StringReader (value));
37 }
38
39 private static List parse(Reader r) throws IOException {
40 List patterns = new ArrayList();
41 BufferedReader br = new BufferedReader(r);
42 int c = 1;
43 String line;
44 while ((line = br.readLine()) != null) {
45 List parts = splitOnWhitespace(line);
46 if (parts.size() < 2)
47 error(c, parts);
48 String type = (String )parts.get(0);
49 PatternElement element = null;
50 if (type.equals("rule")) {
51 if (parts.size() < 3)
52 error(c, parts);
53 element = new Rule();
54 ((Rule)element).setResult((String )parts.get(2));
55 } else if (type.equals("zap")) {
56 element = new Zap();
57 } else if (type.equals("depkill")) {
58 element = new DepKill();
59 } else {
60 error(c, parts);
61 }
62 element.setPattern((String )parts.get(1));
63 patterns.add(element);
64 c++;
65 }
66 r.close();
67 return patterns;
68 }
69
70 private static void error(int line, List parts) {
71 throw new IllegalArgumentException ("Error on line " + line + ": " + parts);
72 }
73
74 private static List splitOnWhitespace(String line) {
75 List list = new ArrayList();
76 Enumeration e = new StringTokenizer(line);
77 while (e.hasMoreElements())
78 list.add(e.nextElement());
79 return list;
80 }
81 }
82 |
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