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annotate src/org/tmatesoft/hg/repo/StatusCollector.java @ 89:42bcb4bffd17

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Refactored to simplify manifest collector
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 26 Jan 2011 06:18:31 +0100
parents 61eedab3eb3e
children a95c700408a9
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@svnkit.com
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16 */
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17 package org.tmatesoft.hg.repo;
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18
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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.HashMap;
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25 import java.util.LinkedHashMap;
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26 import java.util.LinkedList;
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27 import java.util.List;
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28 import java.util.Map;
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29 import java.util.TreeMap;
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30 import java.util.TreeSet;
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31
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32 import org.tmatesoft.hg.core.Nodeid;
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33 import org.tmatesoft.hg.core.Path;
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34
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35
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36 /**
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37 * RevisionWalker?
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38 *
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39 * @author Artem Tikhomirov
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40 * @author TMate Software Ltd.
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41 */
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42 public class StatusCollector {
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43
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44 private final HgRepository repo;
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45 private final Map<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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47 public StatusCollector(HgRepository hgRepo) {
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48 this.repo = hgRepo;
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49 cache = new HashMap<Integer, ManifestRevisionInspector>();
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50 ManifestRevisionInspector emptyFakeState = new ManifestRevisionInspector();
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51 emptyFakeState.begin(-1, null);
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52 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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53 cache.put(-1, emptyFakeState);
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54 }
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56 public HgRepository getRepo() {
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57 return repo;
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58 }
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59
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60 private ManifestRevisionInspector get(int rev) {
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61 ManifestRevisionInspector i = cache.get(rev);
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62 if (i == null) {
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63 i = new ManifestRevisionInspector();
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64 cache.put(rev, i);
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65 repo.getManifest().walk(rev, rev, i);
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66 }
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67 return i;
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68 }
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70 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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71 return get(rev);
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72 }
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74 // hg status --change <rev>
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75 public void change(int rev, Inspector inspector) {
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76 int[] parents = new int[2];
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77 repo.getChangelog().parents(rev, parents, null, null);
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78 walk(parents[0], rev, inspector);
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79 }
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81 // I assume revision numbers are the same for changelog and manifest - here
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82 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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83 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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84 public void walk(int rev1, int rev2, Inspector inspector) {
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85 if (rev1 == rev2) {
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86 throw new IllegalArgumentException();
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87 }
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88 if (inspector == null) {
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89 throw new IllegalArgumentException();
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90 }
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91 if (inspector instanceof Record) {
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92 ((Record) inspector).init(rev1, rev2, this);
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93 }
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94 if (rev1 == TIP) {
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95 rev1 = repo.getManifest().getRevisionCount() - 1;
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96 }
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97 if (rev2 == TIP) {
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98 rev2 = repo.getManifest().getRevisionCount() - 1; // XXX add Revlog.tip() func ?
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99 }
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100 // in fact, rev1 and rev2 are often next (or close) to each other,
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101 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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102 ManifestRevisionInspector r1, r2 ;
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103 if (!cache.containsKey(rev1) && !cache.containsKey(rev2) && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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104 int minRev = rev1 < rev2 ? rev1 : rev2;
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105 int maxRev = minRev == rev1 ? rev2 : rev1;
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106 if (minRev > 0) {
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107 minRev--; // expand range a bit
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108 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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109 // which gonna be read anyway
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110 }
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112 repo.getManifest().walk(minRev, maxRev, new HgManifest.Inspector() {
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113 private ManifestRevisionInspector delegate;
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114
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115 public boolean begin(int revision, Nodeid nid) {
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116 cache.put(revision, delegate = new ManifestRevisionInspector());
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117 delegate.begin(revision, nid);
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118 return true;
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119 }
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120
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121 public boolean next(Nodeid nid, String fname, String flags) {
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122 delegate.next(nid, fname, flags);
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123 return true;
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124 }
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125
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126 public boolean end(int revision) {
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127 delegate.end(revision);
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128 delegate = null;
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129 return true;
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130 }
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131 });
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132 }
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133 r1 = get(rev1);
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134 r2 = get(rev2);
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135
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136
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137 TreeSet<String> r1Files = new TreeSet<String>(r1.files());
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138 for (String fname : r2.files()) {
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139 if (r1Files.remove(fname)) {
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140 Nodeid nidR1 = r1.nodeid(fname);
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141 Nodeid nidR2 = r2.nodeid(fname);
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142 String flagsR1 = r1.flags(fname);
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143 String flagsR2 = r2.flags(fname);
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144 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || flagsR2.equals(flagsR1))) {
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145 inspector.clean(fname);
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146 } else {
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147 inspector.modified(fname);
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148 }
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149 } else {
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150 HgDataFile df = repo.getFileNode(fname);
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151 boolean isCopy = false;
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152 while (df.isCopy()) {
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153 Path original = df.getCopySourceName();
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154 if (r1Files.contains(original.toString())) {
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155 df = repo.getFileNode(original);
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156 int changelogRevision = df.getChangesetLocalRevision(0);
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157 if (changelogRevision <= rev1) {
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158 // copy/rename source was known prior to rev1
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159 // (both r1Files.contains is true and original was created earlier than rev1)
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160 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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161 // might get removed somewhere in between (changelogRevision < R < rev1)
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162 inspector.copied(original.toString(), fname);
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163 isCopy = true;
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164 }
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165 break;
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166 }
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167 df = repo.getFileNode(original); // try more steps away
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168 }
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169 if (!isCopy) {
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170 inspector.added(fname);
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171 }
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172 }
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173 }
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174 for (String left : r1Files) {
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175 inspector.removed(left);
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176 }
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177 // inspector.done() if useful e.g. in UI client
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178 }
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179
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180 public Record status(int rev1, int rev2) {
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181 Record rv = new Record();
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182 walk(rev1, rev2, rv);
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183 return rv;
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184 }
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185
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186 public interface Inspector {
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187 void modified(String fname);
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188 void added(String fname);
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189 // XXX need to specify whether StatusCollector invokes added() along with copied or not!
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190 void copied(String fnameOrigin, String fnameAdded); // if copied files of no interest, should delegate to self.added(fnameAdded);
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191 void removed(String fname);
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192 void clean(String fname);
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193 void missing(String fname); // aka deleted (tracked by Hg, but not available in FS any more
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194 void unknown(String fname); // not tracked
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195 void ignored(String fname);
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196 }
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197
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198 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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199 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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200 public static class Record implements Inspector {
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201 private List<String> modified, added, removed, clean, missing, unknown, ignored;
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202 private Map<String, String> copied;
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203
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204 private int startRev, endRev;
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205 private StatusCollector statusHelper;
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206
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207 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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208 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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209 // implicit reference to StatusCollector) may be better?
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210 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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211 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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212 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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213 // how to supply [start..end] values there easily
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214 /*package-local*/void init(int startRevision, int endRevision, StatusCollector self) {
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215 startRev = startRevision;
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216 endRev = endRevision;
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217 statusHelper = self;
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218 }
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219
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220 public Nodeid nodeidBeforeChange(String fname) {
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221 if (statusHelper == null || startRev == BAD_REVISION) {
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222 return null;
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223 }
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224 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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225 return null;
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226 }
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227 return statusHelper.raw(startRev).nodeid(fname);
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228 }
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229 public Nodeid nodeidAfterChange(String fname) {
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230 if (statusHelper == null || endRev == BAD_REVISION) {
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231 return null;
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232 }
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233 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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234 return null;
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235 }
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236 return statusHelper.raw(endRev).nodeid(fname);
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237 }
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238
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239 public List<String> getModified() {
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240 return proper(modified);
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241 }
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242
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243 public List<String> getAdded() {
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244 return proper(added);
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245 }
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246
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247 public List<String> getRemoved() {
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248 return proper(removed);
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249 }
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250
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251 public Map<String,String> getCopied() {
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252 if (copied == null) {
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253 return Collections.emptyMap();
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254 }
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255 return Collections.unmodifiableMap(copied);
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256 }
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257
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258 public List<String> getClean() {
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259 return proper(clean);
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260 }
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261
05829a70b30b Status operation extracted into separate, cache-friendly class
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262 public List<String> getMissing() {
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263 return proper(missing);
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264 }
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265
05829a70b30b Status operation extracted into separate, cache-friendly class
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266 public List<String> getUnknown() {
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267 return proper(unknown);
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268 }
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269
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270 public List<String> getIgnored() {
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271 return proper(ignored);
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272 }
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273
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274 private List<String> proper(List<String> l) {
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275 if (l == null) {
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276 return Collections.emptyList();
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277 }
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278 return Collections.unmodifiableList(l);
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279 }
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280
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281 //
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282 //
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283
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284 public void modified(String fname) {
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285 modified = doAdd(modified, fname);
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286 }
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287
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288 public void added(String fname) {
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289 added = doAdd(added, fname);
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290 }
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291
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292 public void copied(String fnameOrigin, String fnameAdded) {
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293 if (copied == null) {
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294 copied = new LinkedHashMap<String, String>();
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295 }
74
6f1b88693d48 Complete refactoring to org.tmatesoft
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296 added(fnameAdded);
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297 copied.put(fnameAdded, fnameOrigin);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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298 }
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299
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300 public void removed(String fname) {
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301 removed = doAdd(removed, fname);
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302 }
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303
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304 public void clean(String fname) {
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305 clean = doAdd(clean, fname);
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306 }
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307
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308 public void missing(String fname) {
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309 missing = doAdd(missing, fname);
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310 }
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311
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312 public void unknown(String fname) {
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313 unknown = doAdd(unknown, fname);
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314 }
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315
05829a70b30b Status operation extracted into separate, cache-friendly class
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316 public void ignored(String fname) {
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317 ignored = doAdd(ignored, fname);
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318 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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319
05829a70b30b Status operation extracted into separate, cache-friendly class
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320 private static List<String> doAdd(List<String> l, String s) {
05829a70b30b Status operation extracted into separate, cache-friendly class
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321 if (l == null) {
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322 l = new LinkedList<String>();
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323 }
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324 l.add(s);
05829a70b30b Status operation extracted into separate, cache-friendly class
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325 return l;
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326 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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327 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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328
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
329 /*package-local*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
330 private final TreeMap<String, Nodeid> idsMap;
42bcb4bffd17 Refactored to simplify manifest collector
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331 private final TreeMap<String, String> flagsMap;
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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332
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
333 public ManifestRevisionInspector() {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
334 idsMap = new TreeMap<String, Nodeid>();
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
335 flagsMap = new TreeMap<String, String>();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
336 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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337
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
338 public Collection<String> files() {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
339 return idsMap.keySet();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
340 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
341
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
342 public Nodeid nodeid(String fname) {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
343 return idsMap.get(fname);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
344 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
345
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
346 public String flags(String fname) {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
347 return flagsMap.get(fname);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
348 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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349
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
350 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
351
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
352 public boolean next(Nodeid nid, String fname, String flags) {
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
353 idsMap.put(fname, nid);
42bcb4bffd17 Refactored to simplify manifest collector
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
354 flagsMap.put(fname, flags);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
355 return true;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
356 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
357
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
358 public boolean end(int revision) {
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
359 // in fact, this class cares about single revision
42bcb4bffd17 Refactored to simplify manifest collector
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
360 return false;
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
361 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
362
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
363 public boolean begin(int revision, Nodeid nid) {
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
364 return true;
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
365 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
366 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
367
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
368 }