Mercurial > hg4j

annotate hg4j/src/main/java/org/tmatesoft/hg/internal/ByteArrayChannel.java @ 213:6ec4af642ba8 gradle

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Project uses Gradle for build - actual changes
author Alexander Kitaev <kitaev@gmail.com>
date Tue, 10 May 2011 10:52:53 +0200
parents
children
rev   line source
213
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
1 /*
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2011 TMate Software Ltd
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
3 *
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
7 *
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
12 *
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
16 */
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
18
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
19 import java.nio.ByteBuffer;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
20 import java.util.LinkedList;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
21 import java.util.List;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
22
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
23 import org.tmatesoft.hg.util.ByteChannel;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
24
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
25 /**
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
26 *
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
27 * @author Artem Tikhomirov
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
28 * @author TMate Software Ltd.
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
29 */
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
30 public class ByteArrayChannel implements ByteChannel {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
31 private final List<ByteBuffer> buffers;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
32 private ByteBuffer target;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
33 private byte[] result;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
34
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
35 public ByteArrayChannel() {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
36 this(-1);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
37 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
38
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
39 public ByteArrayChannel(int size) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
40 if (size == -1) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
41 buffers = new LinkedList<ByteBuffer>();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
42 } else {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
43 if (size < 0) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
44 throw new IllegalArgumentException(String.valueOf(size));
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
45 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
46 buffers = null;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
47 target = ByteBuffer.allocate(size);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
48 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
49 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
50
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
51 // TODO document what happens on write after toArray() in each case
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
52 public int write(ByteBuffer buffer) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
53 int rv = buffer.remaining();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
54 if (buffers == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
55 target.put(buffer);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
56 } else {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
57 ByteBuffer copy = ByteBuffer.allocate(rv);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
58 copy.put(buffer);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
59 buffers.add(copy);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
60 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
61 return rv;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
62 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
63
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
64 public byte[] toArray() {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
65 if (result != null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
66 return result;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
67 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
68 if (buffers == null) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
69 assert target.hasArray();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
70 // int total = target.position();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
71 // System.arraycopy(target.array(), new byte[total]);
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
72 // I don't want to duplicate byte[] for now
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
73 // although correct way of doing things is to make a copy and discard target
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
74 return target.array();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
75 } else {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
76 int total = 0;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
77 for (ByteBuffer bb : buffers) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
78 bb.flip();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
79 total += bb.limit();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
80 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
81 result = new byte[total];
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
82 int off = 0;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
83 for (ByteBuffer bb : buffers) {
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
84 bb.get(result, off, bb.limit());
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
85 off += bb.limit();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
86 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
87 buffers.clear();
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
88 return result;
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
89 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
90 }
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
parents:
diff changeset
91 }