1 /**
2 * Copyright (c) 2004-2011 QOS.ch
3 * All rights reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 *
24 */
25 package org.slf4j.migrator.line;
26
27 import java.util.regex.Matcher;
28 import java.util.regex.Pattern;
29
30
31 /**
32 * This class represents a conversion rule It uses a Pattern and defines for
33 * each capturing group of this Pattern a replacement text
34 *
35 * @author jean-noelcharpin
36 *
37 */
38 public class MultiGroupConversionRule implements ConversionRule {
39
40 // It is extremely unlikely to encounter more than 10 groups in one of
41 // our conversion reg-expressions
42 final private static int MAX_GROUPS = 10;
43
44 private Pattern pattern;
45 private String[] replacementTable = new String[MAX_GROUPS];
46
47 public MultiGroupConversionRule(Pattern pattern) {
48 this.pattern = pattern;
49 }
50
51 /* (non-Javadoc)
52 * @see org.slf4j.converter.ConversionRule#getPattern()
53 */
54 public Pattern getPattern() {
55 return pattern;
56 }
57
58 public void addReplacement(int groupIndex, String replacement) {
59 if(groupIndex == 0) {
60 throw new IllegalArgumentException("regex groups start at 1, not zero");
61 }
62 replacementTable[groupIndex] = replacement;
63 }
64
65 /* (non-Javadoc)
66 * @see org.slf4j.converter.ConversionRule#getReplacement(java.lang.Integer)
67 */
68 public String getReplacement(int groupIndex) {
69 return replacementTable[groupIndex];
70 }
71
72 /* (non-Javadoc)
73 * @see org.slf4j.converter.ConversionRule#replace(java.util.regex.Matcher)
74 */
75 public String replace(Matcher matcher) {
76 StringBuffer replacementBuffer = new StringBuffer();
77 String replacementText;
78
79 for (int group = 1; group <= matcher.groupCount(); group++) {
80 replacementText = getReplacement(group);
81 if (replacementText != null) {
82 //System.out.println("replacing group " + group + " : "
83 // + matcher.group(group) + " with " + replacementText);
84 replacementBuffer.append(replacementText);
85 } else {
86 replacementBuffer.append(matcher.group(group));
87 }
88 }
89 return replacementBuffer.toString();
90 }
91
92 public String getAdditionalLine() {
93 return null;
94 }
95 }