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1
5 package com.tc.util;
6
7 import java.io.BufferedOutputStream  ;
8 import java.io.BufferedReader ;
9 import java.io.File ;
10 import java.io.FileInputStream ;
11 import java.io.FileNotFoundException ;
12 import java.io.FileOutputStream ;
13 import java.io.IOException ;
14 import java.io.InputStreamReader ;
15 import java.util.Arrays ;
16 import java.util.Comparator ;
17 import java.util.regex.Matcher ;
18 import java.util.regex.Pattern ;
19
20 public final class ReplaceLine {
21
22 private ReplaceLine() {
23 }
25
26
31 public static void parseFile(ReplaceLine.Token[] tokens, File file) throws FileNotFoundException , IOException {
32 Arrays.sort(tokens, new Comparator () {
33 public int compare(Object o1, Object o2) {
34 return new Integer (((Token) o1).lineNumber).compareTo(new Integer (((Token) o2).lineNumber));
35 }
36 });
37 int tokenIndex = 0, lineIndex = 0;
38 StringBuffer text = new StringBuffer ();
39 BufferedReader reader = new BufferedReader (new InputStreamReader (new FileInputStream (file)));
40 String line;
41 while ((line = reader.readLine()) != null) {
42 if (tokenIndex < tokens.length && ++lineIndex == tokens[tokenIndex].lineNumber) {
43 line = replaceToken(tokens[tokenIndex].replacePattern, line, tokens[tokenIndex].value);
44 tokenIndex++;
45 }
46 text.append(line + "\n");
47 }
48 reader.close();
49 BufferedOutputStream out = new BufferedOutputStream (new FileOutputStream (file));
50 out.write(text.toString().getBytes());
51 out.flush();
52 out.close();
53 }
54
55 private static String replaceToken(String expression, String text, String value) {
56 Pattern pattern = Pattern.compile(expression);
57 Matcher matcher = pattern.matcher(text);
58 while (matcher.find()) {
59 return matcher.replaceAll(value);
60 }
61 return text;
62 }
63
64 public static class Token {
65 private final int lineNumber;
66 private final String replacePattern;
67 private final String value;
68
69 public Token(int lineNumber, String replacePattern, String value) {
70 this.lineNumber = lineNumber;
71 this.replacePattern = replacePattern;
72 this.value = value;
73 }
74 }
75 }
76 |
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