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annotate src/org/tmatesoft/hg/internal/PathGlobMatcher.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents 981f9f50bb6c
children 528b6780a8bd
rev   line source
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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@hg4j.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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4a948ec83980 core.Path to util.Path as it's not Hg repo dependant
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21 import org.tmatesoft.hg.util.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 throw new IllegalArgumentException(ex);
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48 }
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49 }
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51
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52 // HgIgnore.glob2regex is similar, but IsIgnore solves slightly different task
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53 // (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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54 // which is not generally the case
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55 private static String glob2regexp(String glob) { // FIXME TESTS NEEDED!!!
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56 int end = glob.length() - 1;
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57 if (glob.length() > 2 && glob.charAt(end) == '*' && glob.charAt(end - 1) == '.') {
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58 end-=2;
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59 }
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60 boolean needLineEndMatch = true;//glob.charAt(end) != '*';
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61 // while (end > 0 && glob.charAt(end) == '*') end--; // remove trailing * that are useless for Pattern.find()
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62 StringBuilder sb = new StringBuilder(end*2);
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63 // if (glob.charAt(0) != '*') {
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64 sb.append('^');
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65 // }
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66 for (int i = 0; i <= end; i++) {
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67 char ch = glob.charAt(i);
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68 if (ch == '*') {
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69 if (i < end && glob.charAt(i+1) == '*') {
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70 // any char, including path segment separator
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71 sb.append(".*?");
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72 i++;
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73 if (i < end && glob.charAt(i+1) == '/') {
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74 sb.append("/?");
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75 i++;
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76 }
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77 } else {
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78 // just path segments
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79 sb.append("[^/]*?");
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80 }
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81 continue;
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82 } else if (ch == '?') {
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83 sb.append("[^/]");
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84 continue;
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85 } else if (ch == '.' || ch == '\\') {
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86 sb.append('\\');
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87 }
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88 sb.append(ch);
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89 }
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90 if (needLineEndMatch) {
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91 sb.append('$');
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92 }
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93 return sb.toString();
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94 }
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95
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96 public boolean accept(Path path) {
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97 return delegate.accept(path);
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98 }
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99
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100 }