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comparison src/org/tmatesoft/hg/util/FileWalker.java @ 74:6f1b88693d48

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Complete refactoring to org.tmatesoft
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 24 Jan 2011 03:14:45 +0100
parents src/com/tmate/hgkit/fs/FileWalker.java@4cfc47bc14cc
children a3a2e5deb320
comparison
equal deleted inserted replaced
73:0d279bcc4442 74:6f1b88693d48
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@svnkit.com
16 */
17 package org.tmatesoft.hg.util;
18
19 import java.io.File;
20 import java.util.LinkedList;
21 import java.util.NoSuchElementException;
22
23 /**
24 *
25 * @author Artem Tikhomirov
26 * @author TMate Software Ltd.
27 */
28 public class FileWalker {
29
30 private final File startDir;
31 private final LinkedList<File> dirQueue;
32 private final LinkedList<File> fileQueue;
33 private File nextFile;
34 private String nextPath;
35
36 // FilenameFilter is used in a non-standard way - first argument, dir, is always startDir,
37 // while second arg, name, is startDir-relative path to the file in question
38 public FileWalker(File startDir) {
39 this.startDir = startDir;
40 dirQueue = new LinkedList<File>();
41 fileQueue = new LinkedList<File>();
42 reset();
43 }
44
45 public void reset() {
46 fileQueue.clear();
47 dirQueue.clear();
48 dirQueue.add(startDir);
49 nextFile = null;
50 nextPath = null;
51 }
52
53 public boolean hasNext() {
54 return fill();
55 }
56
57 public void next() {
58 if (!fill()) {
59 throw new NoSuchElementException();
60 }
61 nextFile = fileQueue.removeFirst();
62 nextPath = path(nextFile);
63 }
64
65 public String name() {
66 return nextPath;
67 }
68
69 public File file() {
70 return nextFile;
71 }
72
73 private String path(File f) {
74 // XXX LocalHgRepo#normalize
75 String p = f.getPath().substring(startDir.getPath().length() + 1);
76 return p.replace('\\', '/').replace("//", "/");
77 }
78
79 private File[] listFiles(File f) {
80 // in case we need to solve os-related file issues (mac with some encodings?)
81 return f.listFiles();
82 }
83
84 // return true when fill added any elements to fileQueue.
85 private boolean fill() {
86 while (fileQueue.isEmpty()) {
87 if (dirQueue.isEmpty()) {
88 return false;
89 }
90 while (!dirQueue.isEmpty()) {
91 File dir = dirQueue.removeFirst();
92 for (File f : listFiles(dir)) {
93 if (f.isDirectory()) {
94 if (!".hg".equals(f.getName())) {
95 dirQueue.addLast(f);
96 }
97 } else {
98 fileQueue.addLast(f);
99 }
100 }
101 break;
102 }
103 }
104 return !fileQueue.isEmpty();
105 }
106 }