Mercurial > jhg

comparison src/org/tmatesoft/hg/util/RegularFileInfo.java @ 287:ed6b74a58c66

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use FileInfo abstraction with necessary subset of File functionality instead of File to facilitate other effective file system iterators
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 07 Sep 2011 09:33:27 +0200
parents
children 981f9f50bb6c
comparison
equal deleted inserted replaced
286:954763c82cc3 287:ed6b74a58c66
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 import java.io.File;
20 import java.io.FileInputStream;
21 import java.io.FileNotFoundException;
22 import java.io.IOException;
23 import java.nio.ByteBuffer;
24 import java.nio.channels.ReadableByteChannel;
25
26 /**
27 *
28 * @author Artem Tikhomirov
29 * @author TMate Software Ltd.
30 */
31 public class RegularFileInfo implements FileInfo {
32 private File file;
33
34 public RegularFileInfo() {
35 }
36
37 public void init(File f) {
38 file = f;
39 }
40
41 public boolean exists() {
42 return file.canRead() && file.isFile();
43 }
44
45 public int lastModified() {
46 return (int) (file.lastModified() / 1000);
47 }
48
49 public long length() {
50 return file.length();
51 }
52
53 public ReadableByteChannel newInputChannel() {
54 try {
55 return new FileInputStream(file).getChannel();
56 } catch (FileNotFoundException ex) {
57 ex.printStackTrace(); // FIXME log debug.
58 // shall not happen, provided this class is used correctly
59 return new ReadableByteChannel() {
60
61 public boolean isOpen() {
62 return true;
63 }
64
65 public void close() throws IOException {
66 }
67
68 public int read(ByteBuffer dst) throws IOException {
69 // EOF right away
70 return -1;
71 }
72 };
73 }
74 }
75
76 }