Mercurial > hg4j
annotate src/org/tmatesoft/hg/internal/PathGlobMatcher.java @ 114:46291ec605a0
Filters to read and initialize according to configuration files
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 03 Feb 2011 22:13:55 +0100 |
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children | 68ba22a2133a |
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1 /* |
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2 * Copyright (c) 2011 TMate Software Ltd |
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3 * |
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4 * This program is free software; you can redistribute it and/or modify |
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5 * it under the terms of the GNU General Public License as published by |
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6 * the Free Software Foundation; version 2 of the License. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, |
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 * GNU General Public License for more details. |
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12 * |
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13 * For information on how to redistribute this software under |
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14 * the terms of a license other than GNU General Public License |
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15 * contact TMate Software at support@svnkit.com |
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16 */ |
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17 package org.tmatesoft.hg.internal; |
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18 |
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19 import java.util.regex.PatternSyntaxException; |
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20 |
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21 import org.tmatesoft.hg.core.Path; |
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22 |
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23 /** |
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24 * |
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25 * @author Artem Tikhomirov |
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26 * @author TMate Software Ltd. |
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27 */ |
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28 public class PathGlobMatcher implements Path.Matcher { |
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29 |
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30 private final PathRegexpMatcher delegate; |
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31 |
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32 /** |
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33 * |
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34 * @param globPatterns |
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35 * @throws NullPointerException if argument is null |
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36 * @throws IllegalArgumentException if any of the patterns is not valid |
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37 */ |
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38 public PathGlobMatcher(String... globPatterns) { |
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39 String[] regexp = new String[globPatterns.length]; //deliberately let fail with NPE |
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40 int i = 0; |
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41 for (String s : globPatterns) { |
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42 regexp[i] = glob2regexp(s); |
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43 } |
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44 try { |
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45 delegate = new PathRegexpMatcher(regexp); |
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46 } catch (PatternSyntaxException ex) { |
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47 ex.printStackTrace(); |
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48 throw new IllegalArgumentException(ex); |
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49 } |
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50 } |
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51 |
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52 |
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53 // HgIgnore.glob2regex is similar, but IsIgnore solves slightly different task |
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54 // (need to match partial paths, e.g. for glob 'bin' shall match not only 'bin' folder, but also any path below it, |
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55 // which is not generally the case |
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56 private static String glob2regexp(String glob) { |
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57 int end = glob.length() - 1; |
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58 boolean needLineEndMatch = glob.charAt(end) != '*'; |
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59 while (end > 0 && glob.charAt(end) == '*') end--; // remove trailing * that are useless for Pattern.find() |
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60 StringBuilder sb = new StringBuilder(end*2); |
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61 for (int i = 0; i <= end; i++) { |
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62 char ch = glob.charAt(i); |
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63 if (ch == '*') { |
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64 if (glob.charAt(i+1) == '*') { // i < end because we've stripped any trailing * earlier |
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65 // any char, including path segment separator |
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66 sb.append(".*?"); |
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67 } else { |
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68 // just path segments |
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69 sb.append("[^/]*?"); |
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70 } |
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71 continue; |
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72 } else if (ch == '?') { |
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73 sb.append("[^/]"); |
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74 continue; |
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75 } else if (ch == '.' || ch == '\\') { |
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76 sb.append('\\'); |
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77 } |
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78 sb.append(ch); |
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79 } |
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80 if (needLineEndMatch) { |
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81 sb.append('$'); |
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82 } |
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83 return sb.toString(); |
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84 } |
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85 |
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86 public boolean accept(Path path) { |
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87 return delegate.accept(path); |
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88 } |
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89 |
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90 } |