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annotate hg4j/src/main/java/org/tmatesoft/hg/util/Path.java @ 213:6ec4af642ba8 gradle

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Project uses Gradle for build - actual changes
author Alexander Kitaev <kitaev@gmail.com>
date Tue, 10 May 2011 10:52:53 +0200
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6ec4af642ba8 Project uses Gradle for build - actual changes
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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.util;
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18
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19 /**
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20 * Identify repository files (not String nor io.File). Convenient for pattern matching. Memory-friendly.
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21 *
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22 * @author Artem Tikhomirov
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23 * @author TMate Software Ltd.
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24 */
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25 public final class Path implements CharSequence, Comparable<Path>/*Cloneable? - although clone for paths make no sense*/{
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26 // private String[] segments;
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27 // private int flags; // dir, unparsed
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28 private String path;
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29
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30 /*package-local*/Path(String p) {
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31 path = p;
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32 }
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33
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34 /**
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35 * Check if this is directory's path.
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36 * Note, this method doesn't perform any file system operation.
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37 *
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38 * @return true when this path points to a directory
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39 */
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40 public boolean isDirectory() {
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41 // XXX simple logic for now. Later we may decide to have an explicit factory method to create directory paths
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42 return path.charAt(path.length() - 1) == '/';
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43 }
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44
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45 public int length() {
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46 return path.length();
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47 }
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48
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49 public char charAt(int index) {
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50 return path.charAt(index);
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51 }
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52
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53 public CharSequence subSequence(int start, int end) {
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54 // new Path if start-end matches boundaries of any subpath
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55 return path.substring(start, end);
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56 }
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57
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58 @Override
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59 public String toString() {
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60 return path; // CharSequence demands toString() impl
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61 }
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62
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63 public int compareTo(Path o) {
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64 return path.compareTo(o.path);
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65 }
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66
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67 @Override
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68 public boolean equals(Object obj) {
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69 if (obj != null && getClass() == obj.getClass()) {
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70 return this == obj || path.equals(((Path) obj).path);
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71 }
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72 return false;
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73 }
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74 @Override
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75 public int hashCode() {
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76 return path.hashCode();
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77 }
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78
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79 public static Path create(String path) {
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80 if (path == null) {
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81 throw new IllegalArgumentException();
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82 }
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83 if (path.indexOf('\\') != -1) {
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84 throw new IllegalArgumentException();
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85 }
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86 Path rv = new Path(path);
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87 return rv;
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88 }
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89
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90 /**
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91 * Path filter.
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92 */
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93 public interface Matcher {
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94 boolean accept(Path path);
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95 }
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96
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97 /**
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98 * Factory for paths
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99 */
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100 public interface Source {
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101 Path path(String p);
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102 }
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103
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104 /**
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105 * Straightforward {@link Source} implementation that creates new Path instance for each supplied string
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106 */
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107 public static class SimpleSource implements Source {
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108 private final PathRewrite normalizer;
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109
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110 public SimpleSource(PathRewrite pathRewrite) {
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111 if (pathRewrite == null) {
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112 throw new IllegalArgumentException();
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113 }
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114 normalizer = pathRewrite;
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115 }
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116
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117 public Path path(String p) {
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118 return Path.create(normalizer.rewrite(p));
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119 }
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120 }
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121 }