Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/DataAccessInputStream.java @ 675:a20121a2bba6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Respect default range (0..tip)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 18 Jul 2013 18:02:36 +0200
parents 545b1d4cc11d
children
rev   line source
673
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2013 TMate Software Ltd
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.IOException;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.io.InputStream;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22 /**
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 * Wrap our internal API into a public one
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 *
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 * @author Artem Tikhomirov
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 * @author TMate Software Ltd.
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 */
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 public class DataAccessInputStream extends InputStream {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 private final DataAccess da;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 private int bytesLeft = -1;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 public DataAccessInputStream(DataAccess dataAccess) {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 da = dataAccess;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 @Override
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
38 public int available() throws IOException {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
39 initAvailable();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 return bytesLeft;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
42
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43 @Override
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44 public int read() throws IOException {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 initAvailable();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
46 if (bytesLeft == 0) {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 return -1;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
49 int rv = da.readByte();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50 bytesLeft--;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 return rv;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
54 @Override
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
55 public int read(byte[] b, int off, int len) throws IOException {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56 initAvailable();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 if (bytesLeft == 0) {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58 return -1;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
59 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
60 if (len == 0) {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
61 return 0;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
62 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
63 int x = Math.min(len, bytesLeft);
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64 da.readBytes(b, off, x);
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 bytesLeft -= x;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
66 return x;
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 private void initAvailable() throws IOException {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 da.reset();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 if (bytesLeft == -1) {
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73 bytesLeft = da.length();
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
74 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
75 }
545b1d4cc11d Refactor HgBundle.GroupElement (clear experimental mark), resolve few technical debt issues
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
76 }