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comparison src/org/tmatesoft/hg/internal/ByteArrayChannel.java @ 608:e1b29756f901

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Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 07 May 2013 21:27:51 +0200
parents 1a7a9a20e1f9
children
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607:66f1cc23b906 608:e1b29756f901
1 /* 1 /*
2 * Copyright (c) 2011 TMate Software Ltd 2 * Copyright (c) 2011-2013 TMate Software Ltd
3 * 3 *
4 * This program is free software; you can redistribute it and/or modify 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 5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License. 6 * the Free Software Foundation; version 2 of the License.
7 * 7 *
21 import java.util.List; 21 import java.util.List;
22 22
23 import org.tmatesoft.hg.util.ByteChannel; 23 import org.tmatesoft.hg.util.ByteChannel;
24 24
25 /** 25 /**
26 * 26 * {@link ByteChannel} implementation that serializes data into a byte array
27 *
27 * @author Artem Tikhomirov 28 * @author Artem Tikhomirov
28 * @author TMate Software Ltd. 29 * @author TMate Software Ltd.
29 */ 30 */
30 public class ByteArrayChannel implements ByteChannel { 31 public class ByteArrayChannel implements ByteChannel {
31 private final List<ByteBuffer> buffers; 32 private final List<ByteBuffer> buffers;
46 buffers = null; 47 buffers = null;
47 target = ByteBuffer.allocate(size); 48 target = ByteBuffer.allocate(size);
48 } 49 }
49 } 50 }
50 51
51 // TODO document what happens on write after toArray() in each case 52 /*
53 * {@link #toArray()} calls do not clear data collected so far, subsequent {@link #write(ByteBuffer)}
54 * augment collected content.
55 */
52 public int write(ByteBuffer buffer) { 56 public int write(ByteBuffer buffer) {
53 int rv = buffer.remaining(); 57 int rv = buffer.remaining();
54 if (buffers == null) { 58 if (buffers == null) {
55 target.put(buffer); 59 target.put(buffer);
56 } else { 60 } else {
57 ByteBuffer copy = ByteBuffer.allocate(rv); 61 ByteBuffer copy = ByteBuffer.allocate(rv);
58 copy.put(buffer); 62 copy.put(buffer);
59 buffers.add(copy); 63 buffers.add(copy);
60 } 64 }
65 result = null;
61 return rv; 66 return rv;
62 } 67 }
63 68
69 /**
70 * @return content accumulated so far
71 */
64 public byte[] toArray() { 72 public byte[] toArray() {
65 if (result != null) { 73 if (result != null) {
66 return result; 74 return result;
67 } 75 }
68 if (buffers == null) { 76 if (buffers == null) {
82 int off = 0; 90 int off = 0;
83 for (ByteBuffer bb : buffers) { 91 for (ByteBuffer bb : buffers) {
84 bb.get(result, off, bb.limit()); 92 bb.get(result, off, bb.limit());
85 off += bb.limit(); 93 off += bb.limit();
86 } 94 }
87 buffers.clear();
88 return result; 95 return result;
89 } 96 }
90 } 97 }
91 } 98 }