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annotate src/org/tmatesoft/hg/repo/Revlog.java @ 77:c677e1593919

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Moved RevlogStream implementation into .internal
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 24 Jan 2011 05:33:47 +0100
parents 6f1b88693d48
children 4222b04f34ee
rev   line source
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1 /*
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2 * Copyright (c) 2010-2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@svnkit.com
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16 */
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17 package org.tmatesoft.hg.repo;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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20
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21 import java.util.Arrays;
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22 import java.util.Collection;
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23 import java.util.Collections;
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24 import java.util.HashMap;
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25 import java.util.LinkedHashSet;
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26 import java.util.Map;
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27 import java.util.Set;
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28
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29 import org.tmatesoft.hg.core.Nodeid;
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30 import org.tmatesoft.hg.internal.RevlogStream;
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32
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33 /**
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 abstract class Revlog {
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39
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40 private final HgRepository hgRepo;
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41 protected final RevlogStream content;
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42
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43 protected Revlog(HgRepository hgRepo, RevlogStream content) {
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44 if (hgRepo == null) {
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45 throw new IllegalArgumentException();
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46 }
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47 if (content == null) {
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48 throw new IllegalArgumentException();
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49 }
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50 this.hgRepo = hgRepo;
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51 this.content = content;
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52 }
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54 public final HgRepository getRepo() {
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55 return hgRepo;
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56 }
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57
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58 public int getRevisionCount() {
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59 return content.revisionCount();
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60 }
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61
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62 public int getLocalRevisionNumber(Nodeid nid) {
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63 int revision = content.findLocalRevisionNumber(nid);
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64 if (revision == Integer.MIN_VALUE) {
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65 throw new IllegalArgumentException(String.format("%s doesn't represent a revision of %s", nid.toString(), this /*XXX HgDataFile.getPath might be more suitable here*/));
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66 }
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67 return revision;
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68 }
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70 // Till now, i follow approach that NULL nodeid is never part of revlog
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71 public boolean isKnown(Nodeid nodeid) {
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72 final int rn = content.findLocalRevisionNumber(nodeid);
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73 if (Integer.MIN_VALUE == rn) {
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74 return false;
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75 }
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76 if (rn < 0 || rn >= content.revisionCount()) {
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77 // Sanity check
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78 throw new IllegalStateException();
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79 }
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80 return true;
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81 }
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83 /**
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84 * Access to revision data as is (decompressed, but otherwise unprocessed, i.e. not parsed for e.g. changeset or manifest entries)
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85 * @param nodeid
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86 */
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87 public byte[] content(Nodeid nodeid) {
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88 return content(getLocalRevisionNumber(nodeid));
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89 }
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91 /**
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92 * @param revision - repo-local index of this file change (not a changelog revision number!)
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93 */
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94 public byte[] content(int revision) {
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95 final byte[][] dataPtr = new byte[1][];
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96 RevlogStream.Inspector insp = new RevlogStream.Inspector() {
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97 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
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98 dataPtr[0] = data;
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99 }
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100 };
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101 content.iterate(revision, revision, true, insp);
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102 return dataPtr[0];
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103 }
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104
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105 /**
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106 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
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107 *
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108 * @param revision - revision to query parents, or {@link HgRepository#TIP}
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109 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
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110 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
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111 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
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112 * @return
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113 */
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114 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
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115 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
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116 throw new IllegalArgumentException(String.valueOf(revision));
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117 }
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118 if (parentRevisions == null || parentRevisions.length < 2) {
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119 throw new IllegalArgumentException(String.valueOf(parentRevisions));
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120 }
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121 if (parent1 != null && parent1.length < 20) {
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122 throw new IllegalArgumentException(parent1.toString());
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123 }
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124 if (parent2 != null && parent2.length < 20) {
576d6e8a09f6 Analog of 'hg status --change' command
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125 throw new IllegalArgumentException(parent2.toString());
576d6e8a09f6 Analog of 'hg status --change' command
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126 }
77
c677e1593919 Moved RevlogStream implementation into .internal
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diff changeset
127 class ParentCollector implements RevlogStream.Inspector {
56
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diff changeset
128 public int p1 = -1;
576d6e8a09f6 Analog of 'hg status --change' command
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129 public int p2 = -1;
576d6e8a09f6 Analog of 'hg status --change' command
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130 public byte[] nodeid;
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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131
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132 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
576d6e8a09f6 Analog of 'hg status --change' command
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133 p1 = parent1Revision;
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134 p2 = parent2Revision;
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
135 this.nodeid = new byte[20];
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
136 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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137 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
576d6e8a09f6 Analog of 'hg status --change' command
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138 }
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
139 };
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
140 ParentCollector pc = new ParentCollector();
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
141 content.iterate(revision, revision, false, pc);
576d6e8a09f6 Analog of 'hg status --change' command
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142 parentRevisions[0] = pc.p1;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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143 parentRevisions[1] = pc.p2;
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
144 if (parent1 != null) {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
145 if (parentRevisions[0] == -1) {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
146 Arrays.fill(parent1, 0, 20, (byte) 0);
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
147 } else {
576d6e8a09f6 Analog of 'hg status --change' command
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148 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
149 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
576d6e8a09f6 Analog of 'hg status --change' command
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150 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
151 }
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
152 if (parent2 != null) {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
153 if (parentRevisions[1] == -1) {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
154 Arrays.fill(parent2, 0, 20, (byte) 0);
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
155 } else {
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
156 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
157 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
576d6e8a09f6 Analog of 'hg status --change' command
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diff changeset
158 }
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
159 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
160 }
576d6e8a09f6 Analog of 'hg status --change' command
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 49
diff changeset
161
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
162 /*
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163 * XXX think over if it's better to do either:
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
164 * pw = getChangelog().new ParentWalker(); pw.init() and pass pw instance around as needed
6cce719bbb62 Collector for nodes and their parents
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diff changeset
165 * or
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
166 * add Revlog#getParentWalker(), static class, make cons() and #init package-local, and keep SoftReference to allow walker reuse.
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
167 *
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
168 * and yes, walker is not a proper name
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
169 */
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parents: 24
diff changeset
170 public final class ParentWalker {
6cce719bbb62 Collector for nodes and their parents
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diff changeset
171 private Map<Nodeid, Nodeid> firstParent;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
172 private Map<Nodeid, Nodeid> secondParent;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
173 private Set<Nodeid> allNodes;
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diff changeset
174
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diff changeset
175 public ParentWalker() {
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diff changeset
176 firstParent = secondParent = Collections.emptyMap();
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diff changeset
177 allNodes = Collections.emptySet();
6cce719bbb62 Collector for nodes and their parents
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diff changeset
178 }
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diff changeset
179
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diff changeset
180 public void init() {
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diff changeset
181 final RevlogStream stream = Revlog.this.content;
6cce719bbb62 Collector for nodes and their parents
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diff changeset
182 final int revisionCount = stream.revisionCount();
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
183 firstParent = new HashMap<Nodeid, Nodeid>(revisionCount);
6cce719bbb62 Collector for nodes and their parents
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diff changeset
184 secondParent = new HashMap<Nodeid, Nodeid>(firstParent.size() >> 1); // assume branches/merges are less frequent
6cce719bbb62 Collector for nodes and their parents
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diff changeset
185 allNodes = new LinkedHashSet<Nodeid>();
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
186
77
c677e1593919 Moved RevlogStream implementation into .internal
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
187 RevlogStream.Inspector insp = new RevlogStream.Inspector() {
29
6cce719bbb62 Collector for nodes and their parents
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diff changeset
188 final Nodeid[] sequentialRevisionNodeids = new Nodeid[revisionCount];
6cce719bbb62 Collector for nodes and their parents
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diff changeset
189 int ix = 0;
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
190 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
6cce719bbb62 Collector for nodes and their parents
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parents: 24
diff changeset
191 if (ix != revisionNumber) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
192 // XXX temp code, just to make sure I understand what's going on here
6cce719bbb62 Collector for nodes and their parents
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diff changeset
193 throw new IllegalStateException();
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
194 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
195 if (parent1Revision >= revisionNumber || parent2Revision >= revisionNumber) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
196 throw new IllegalStateException(); // sanity, revisions are sequential
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
197 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
198 final Nodeid nid = new Nodeid(nodeid, true);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
199 sequentialRevisionNodeids[ix++] = nid;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
200 allNodes.add(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
201 if (parent1Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
202 firstParent.put(nid, sequentialRevisionNodeids[parent1Revision]);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
203 if (parent2Revision != -1) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
204 secondParent.put(nid, sequentialRevisionNodeids[parent2Revision]);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
205 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
206 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
207 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
208 };
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
209 stream.iterate(0, -1, false, insp);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
210 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
211
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
212 public Set<Nodeid> allNodes() {
6cce719bbb62 Collector for nodes and their parents
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diff changeset
213 return Collections.unmodifiableSet(allNodes);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
214 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
215
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 29
diff changeset
216 // FIXME need to decide whether Nodeid(00 * 20) is always known or not
346b66add79d Basic lookup for incoming changes
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diff changeset
217 public boolean knownNode(Nodeid nid) {
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
218 return allNodes.contains(nid);
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
219 }
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
220
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
221 // null if none
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
222 public Nodeid firstParent(Nodeid nid) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
223 return firstParent.get(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
224 }
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
225
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
226 // never null, Nodeid.NULL if none known
26e3eeaa3962 branch and user filtering for log operation
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parents: 39
diff changeset
227 public Nodeid safeFirstParent(Nodeid nid) {
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
228 Nodeid rv = firstParent(nid);
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
229 return rv == null ? Nodeid.NULL : rv;
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
230 }
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
231
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
232 public Nodeid secondParent(Nodeid nid) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
233 return secondParent.get(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
234 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
235
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
236 public Nodeid safeSecondParent(Nodeid nid) {
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
237 Nodeid rv = secondParent(nid);
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
238 return rv == null ? Nodeid.NULL : rv;
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
239 }
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 39
diff changeset
240
29
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
241 public boolean appendParentsOf(Nodeid nid, Collection<Nodeid> c) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
242 Nodeid p1 = firstParent(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
243 boolean modified = false;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
244 if (p1 != null) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
245 modified = c.add(p1);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
246 Nodeid p2 = secondParent(nid);
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
247 if (p2 != null) {
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
248 modified = c.add(p2) || modified;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
249 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
250 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
251 return modified;
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
252 }
6cce719bbb62 Collector for nodes and their parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
253 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
254 }