Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/FileContentSupplier.java @ 610:5c68567b3645

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Refresh tags, branches, bookmarks and ignore when their files (or csets in the repo) are changed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 09 May 2013 21:06:48 +0200
parents e447384f3771
children 7c0d2ce340b8
rev   line source
586
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2013 TMate Software Ltd
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.File;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.io.FileInputStream;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import java.io.FileNotFoundException;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22 import java.io.IOException;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 import java.nio.ByteBuffer;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 import java.nio.channels.FileChannel;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 import org.tmatesoft.hg.core.HgIOException;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 import org.tmatesoft.hg.repo.HgRepository;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 import org.tmatesoft.hg.util.Path;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 /**
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 * FIXME files are opened at the moment of instantiation, though the moment the data is requested might be distant
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 *
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 * @author Artem Tikhomirov
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 * @author TMate Software Ltd.
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 */
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36 public class FileContentSupplier implements CommitFacility.ByteDataSupplier {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 private final FileChannel channel;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
38 private IOException error;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
39
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 public FileContentSupplier(HgRepository repo, Path file) throws HgIOException {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 this(new File(repo.getWorkingDir(), file.toString()));
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
42 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44 public FileContentSupplier(File f) throws HgIOException {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 if (!f.canRead()) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
46 throw new HgIOException(String.format("Can't read file %s", f), f);
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 try {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
49 channel = new FileInputStream(f).getChannel();
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50 } catch (FileNotFoundException ex) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 throw new HgIOException("Can't open file", ex, f);
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
54
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
55 public int read(ByteBuffer buf) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56 if (error != null) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 return -1;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
59 try {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
60 return channel.read(buf);
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
61 } catch (IOException ex) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
62 error = ex;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
63 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64 return -1;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
66
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67 public void done() throws IOException {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 channel.close();
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69 if (error != null) {
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 throw error;
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 }
73c20c648c1f HgCommitCommand initial support
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73 }