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comparison 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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212:edb2e2829352 213:6ec4af642ba8
1 /*
2 * Copyright (c) 2011 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.util;
18
19 /**
20 * Identify repository files (not String nor io.File). Convenient for pattern matching. Memory-friendly.
21 *
22 * @author Artem Tikhomirov
23 * @author TMate Software Ltd.
24 */
25 public final class Path implements CharSequence, Comparable<Path>/*Cloneable? - although clone for paths make no sense*/{
26 // private String[] segments;
27 // private int flags; // dir, unparsed
28 private String path;
29
30 /*package-local*/Path(String p) {
31 path = p;
32 }
33
34 /**
35 * Check if this is directory's path.
36 * Note, this method doesn't perform any file system operation.
37 *
38 * @return true when this path points to a directory
39 */
40 public boolean isDirectory() {
41 // XXX simple logic for now. Later we may decide to have an explicit factory method to create directory paths
42 return path.charAt(path.length() - 1) == '/';
43 }
44
45 public int length() {
46 return path.length();
47 }
48
49 public char charAt(int index) {
50 return path.charAt(index);
51 }
52
53 public CharSequence subSequence(int start, int end) {
54 // new Path if start-end matches boundaries of any subpath
55 return path.substring(start, end);
56 }
57
58 @Override
59 public String toString() {
60 return path; // CharSequence demands toString() impl
61 }
62
63 public int compareTo(Path o) {
64 return path.compareTo(o.path);
65 }
66
67 @Override
68 public boolean equals(Object obj) {
69 if (obj != null && getClass() == obj.getClass()) {
70 return this == obj || path.equals(((Path) obj).path);
71 }
72 return false;
73 }
74 @Override
75 public int hashCode() {
76 return path.hashCode();
77 }
78
79 public static Path create(String path) {
80 if (path == null) {
81 throw new IllegalArgumentException();
82 }
83 if (path.indexOf('\\') != -1) {
84 throw new IllegalArgumentException();
85 }
86 Path rv = new Path(path);
87 return rv;
88 }
89
90 /**
91 * Path filter.
92 */
93 public interface Matcher {
94 boolean accept(Path path);
95 }
96
97 /**
98 * Factory for paths
99 */
100 public interface Source {
101 Path path(String p);
102 }
103
104 /**
105 * Straightforward {@link Source} implementation that creates new Path instance for each supplied string
106 */
107 public static class SimpleSource implements Source {
108 private final PathRewrite normalizer;
109
110 public SimpleSource(PathRewrite pathRewrite) {
111 if (pathRewrite == null) {
112 throw new IllegalArgumentException();
113 }
114 normalizer = pathRewrite;
115 }
116
117 public Path path(String p) {
118 return Path.create(normalizer.rewrite(p));
119 }
120 }
121 }