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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 158:b413b16d10a5

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Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 09 Mar 2011 13:16:37 +0100
parents d5268ca7715b
children c9b305df0b89
rev   line source
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1 /*
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2 * Copyright (c) 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@hg4j.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.BAD_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21
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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.LinkedHashMap;
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25 import java.util.LinkedList;
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26 import java.util.List;
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27 import java.util.Map;
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28 import java.util.TreeMap;
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29 import java.util.TreeSet;
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31 import org.tmatesoft.hg.core.HgDataStreamException;
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32 import org.tmatesoft.hg.core.Nodeid;
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33 import org.tmatesoft.hg.util.Path;
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34 import org.tmatesoft.hg.util.PathPool;
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35 import org.tmatesoft.hg.util.PathRewrite;
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37
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38 /**
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39 * RevisionWalker?
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40 *
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41 * @author Artem Tikhomirov
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42 * @author TMate Software Ltd.
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43 */
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44 public class HgStatusCollector {
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46 private final HgRepository repo;
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47 private final Map<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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48 private PathPool pathPool;
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49
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50 public HgStatusCollector(HgRepository hgRepo) {
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51 this.repo = hgRepo;
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52 cache = new TreeMap<Integer, ManifestRevisionInspector>();
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53 ManifestRevisionInspector emptyFakeState = new ManifestRevisionInspector();
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54 emptyFakeState.begin(-1, null);
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55 emptyFakeState.end(-1); // FIXME HgRepo.TIP == -1 as well, need to distinguish fake "prior to first" revision from "the very last"
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56 cache.put(-1, emptyFakeState);
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57 }
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59 public HgRepository getRepo() {
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60 return repo;
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61 }
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63 private ManifestRevisionInspector get(int rev) {
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64 ManifestRevisionInspector i = cache.get(rev);
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65 if (i == null) {
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66 i = new ManifestRevisionInspector();
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67 cache.put(rev, i);
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68 repo.getManifest().walk(rev, rev, i);
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69 }
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70 return i;
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71 }
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73 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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74 return get(rev);
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75 }
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76 /*package-local*/ PathPool getPathPool() {
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77 if (pathPool == null) {
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78 pathPool = new PathPool(new PathRewrite.Empty());
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79 }
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80 return pathPool;
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81 }
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83 /**
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84 * Allows sharing of a common path cache
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85 */
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86 public void setPathPool(PathPool pathPool) {
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87 this.pathPool = pathPool;
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88 }
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91 // hg status --change <rev>
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92 public void change(int rev, HgStatusInspector inspector) {
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93 int[] parents = new int[2];
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94 repo.getChangelog().parents(rev, parents, null, null);
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95 walk(parents[0], rev, inspector);
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96 }
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98 // I assume revision numbers are the same for changelog and manifest - here
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99 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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100 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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101 public void walk(int rev1, int rev2, HgStatusInspector inspector) {
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102 if (rev1 == rev2) {
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103 throw new IllegalArgumentException();
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104 }
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105 if (inspector == null) {
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106 throw new IllegalArgumentException();
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107 }
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108 if (inspector instanceof Record) {
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109 ((Record) inspector).init(rev1, rev2, this);
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110 }
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111 if (rev1 == TIP) {
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112 rev1 = repo.getManifest().getLastRevision();
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113 }
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114 if (rev2 == TIP) {
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115 rev2 = repo.getManifest().getLastRevision();
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116 }
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117 // in fact, rev1 and rev2 are often next (or close) to each other,
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118 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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119 ManifestRevisionInspector r1, r2 ;
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120 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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121 int minRev = rev1 < rev2 ? rev1 : rev2;
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122 int maxRev = minRev == rev1 ? rev2 : rev1;
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123 if (minRev > 0) {
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124 minRev--; // expand range a bit
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125 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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126 // which gonna be read anyway
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127 }
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128
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129 repo.getManifest().walk(minRev, maxRev, new HgManifest.Inspector() {
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130 private ManifestRevisionInspector delegate;
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131
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132 public boolean begin(int revision, Nodeid nid) {
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133 cache.put(revision, delegate = new ManifestRevisionInspector());
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134 delegate.begin(revision, nid);
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135 return true;
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136 }
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137
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138 public boolean next(Nodeid nid, String fname, String flags) {
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139 delegate.next(nid, fname, flags);
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140 return true;
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141 }
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142
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143 public boolean end(int revision) {
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144 delegate.end(revision);
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145 delegate = null;
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146 return true;
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147 }
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148 });
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149 }
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150 r1 = get(rev1);
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151 r2 = get(rev2);
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152
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153 PathPool pp = getPathPool();
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154
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155 TreeSet<String> r1Files = new TreeSet<String>(r1.files());
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156 for (String fname : r2.files()) {
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157 if (r1Files.remove(fname)) {
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158 Nodeid nidR1 = r1.nodeid(fname);
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159 Nodeid nidR2 = r2.nodeid(fname);
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160 String flagsR1 = r1.flags(fname);
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161 String flagsR2 = r2.flags(fname);
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162 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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163 inspector.clean(pp.path(fname));
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164 } else {
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165 inspector.modified(pp.path(fname));
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166 }
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167 } else {
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168 try {
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169 Path copyTarget = pp.path(fname);
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170 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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171 if (copyOrigin != null) {
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172 inspector.copied(pp.path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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173 } else {
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174 inspector.added(copyTarget);
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175 }
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176 } catch (HgDataStreamException ex) {
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177 ex.printStackTrace();
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178 // FIXME perhaps, shall record this exception to dedicated mediator and continue
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179 // for a single file not to be irresolvable obstacle for a status operation
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180 }
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181 }
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182 }
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183 for (String left : r1Files) {
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184 inspector.removed(pp.path(left));
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185 }
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186 }
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187
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188 public Record status(int rev1, int rev2) {
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189 Record rv = new Record();
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190 walk(rev1, rev2, rv);
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191 return rv;
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192 }
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193
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194 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<String> originals, int originalChangelogRevision) throws HgDataStreamException {
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195 HgDataFile df = hgRepo.getFileNode(fname);
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196 while (df.isCopy()) {
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197 Path original = df.getCopySourceName();
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198 if (originals.contains(original.toString())) {
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199 df = hgRepo.getFileNode(original);
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200 int changelogRevision = df.getChangesetLocalRevision(0);
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201 if (changelogRevision <= originalChangelogRevision) {
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202 // copy/rename source was known prior to rev1
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203 // (both r1Files.contains is true and original was created earlier than rev1)
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204 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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205 // might get removed somewhere in between (changelogRevision < R < rev1)
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206 return original;
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207 }
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208 break; // copy/rename done later
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209 }
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210 df = hgRepo.getFileNode(original); // try more steps away
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211 }
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212 return null;
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213 }
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214
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215 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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216 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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217 public static class Record implements HgStatusInspector {
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218 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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219 private Map<Path, Path> copied;
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220
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221 private int startRev, endRev;
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222 private HgStatusCollector statusHelper;
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224 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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225 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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226 // implicit reference to StatusCollector) may be better?
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227 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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228 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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229 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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230 // how to supply [start..end] values there easily
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231 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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232 startRev = startRevision;
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233 endRev = endRevision;
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234 statusHelper = self;
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235 }
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236
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237 public Nodeid nodeidBeforeChange(Path fname) {
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238 if (statusHelper == null || startRev == BAD_REVISION) {
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239 return null;
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240 }
64
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241 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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242 return null;
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243 }
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244 return statusHelper.raw(startRev).nodeid(fname.toString());
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245 }
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246 public Nodeid nodeidAfterChange(Path fname) {
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247 if (statusHelper == null || endRev == BAD_REVISION) {
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248 return null;
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249 }
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250 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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251 return null;
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252 }
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253 return statusHelper.raw(endRev).nodeid(fname.toString());
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254 }
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255
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256 public List<Path> getModified() {
55
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257 return proper(modified);
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258 }
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259
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260 public List<Path> getAdded() {
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261 return proper(added);
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262 }
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263
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264 public List<Path> getRemoved() {
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265 return proper(removed);
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266 }
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267
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268 public Map<Path,Path> getCopied() {
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269 if (copied == null) {
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270 return Collections.emptyMap();
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271 }
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272 return Collections.unmodifiableMap(copied);
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273 }
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274
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275 public List<Path> getClean() {
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276 return proper(clean);
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277 }
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278
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279 public List<Path> getMissing() {
55
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280 return proper(missing);
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281 }
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282
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283 public List<Path> getUnknown() {
55
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284 return proper(unknown);
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285 }
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286
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287 public List<Path> getIgnored() {
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288 return proper(ignored);
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289 }
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290
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291 private List<Path> proper(List<Path> l) {
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292 if (l == null) {
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293 return Collections.emptyList();
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294 }
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295 return Collections.unmodifiableList(l);
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296 }
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297
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298 //
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299 //
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300
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301 public void modified(Path fname) {
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302 modified = doAdd(modified, fname);
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303 }
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304
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305 public void added(Path fname) {
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306 added = doAdd(added, fname);
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307 }
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308
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309 public void copied(Path fnameOrigin, Path fnameAdded) {
55
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310 if (copied == null) {
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311 copied = new LinkedHashMap<Path, Path>();
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312 }
74
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diff changeset
313 added(fnameAdded);
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diff changeset
314 copied.put(fnameAdded, fnameOrigin);
55
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315 }
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316
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317 public void removed(Path fname) {
55
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318 removed = doAdd(removed, fname);
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319 }
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320
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321 public void clean(Path fname) {
55
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322 clean = doAdd(clean, fname);
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323 }
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324
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325 public void missing(Path fname) {
55
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326 missing = doAdd(missing, fname);
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327 }
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328
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329 public void unknown(Path fname) {
55
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330 unknown = doAdd(unknown, fname);
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331 }
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332
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333 public void ignored(Path fname) {
55
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334 ignored = doAdd(ignored, fname);
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335 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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336
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337 private static List<Path> doAdd(List<Path> l, Path p) {
55
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338 if (l == null) {
93
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diff changeset
339 l = new LinkedList<Path>();
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340 }
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341 l.add(p);
55
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342 return l;
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343 }
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344 }
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345
89
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diff changeset
346 /*package-local*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
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diff changeset
347 private final TreeMap<String, Nodeid> idsMap;
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diff changeset
348 private final TreeMap<String, String> flagsMap;
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349
89
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350 public ManifestRevisionInspector() {
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diff changeset
351 idsMap = new TreeMap<String, Nodeid>();
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diff changeset
352 flagsMap = new TreeMap<String, String>();
55
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353 }
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354
89
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355 public Collection<String> files() {
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diff changeset
356 return idsMap.keySet();
55
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357 }
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358
89
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359 public Nodeid nodeid(String fname) {
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360 return idsMap.get(fname);
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361 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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362
89
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diff changeset
363 public String flags(String fname) {
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diff changeset
364 return flagsMap.get(fname);
55
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diff changeset
365 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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366
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
367 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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368
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
369 public boolean next(Nodeid nid, String fname, String flags) {
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diff changeset
370 idsMap.put(fname, nid);
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diff changeset
371 flagsMap.put(fname, flags);
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372 return true;
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373 }
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374
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375 public boolean end(int revision) {
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376 // in fact, this class cares about single revision
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377 return false;
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378 }
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379
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380 public boolean begin(int revision, Nodeid nid) {
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381 return true;
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382 }
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383 }
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384
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385 }