Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 306:971baa95fb07

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Experimental code to build file history, handy access to changeset added
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Sep 2011 04:05:41 +0200
parents 2ffcbf360fd5
children ee6b467c1a5f
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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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.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.TreeSet;
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29
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30 import org.tmatesoft.hg.core.HgBadStateException;
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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.internal.IntMap;
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34 import org.tmatesoft.hg.internal.ManifestRevision;
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35 import org.tmatesoft.hg.internal.Pool;
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36 import org.tmatesoft.hg.util.Path;
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37 import org.tmatesoft.hg.util.PathPool;
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38 import org.tmatesoft.hg.util.PathRewrite;
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40
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41 /**
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42 * RevisionWalker?
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43 *
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public class HgStatusCollector {
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49 private final HgRepository repo;
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50 private final IntMap<ManifestRevision> cache; // sparse array, in fact
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51 // with cpython repository, ~70 000 changes, complete Log (direct out, no reverse) output
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52 // no cache limit, no nodeids and fname caching - OOME on changeset 1035
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53 // no cache limit, but with cached nodeids and filenames - 1730+
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54 // cache limit 100 - 19+ minutes to process 10000, and still working (too long, stopped)
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55 private final int cacheMaxSize = 50; // do not keep too much manifest revisions
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56 private PathPool pathPool;
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57 private final Pool<Nodeid> cacheNodes;
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58 private final Pool<Path> cacheFilenames;
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59 private final ManifestRevision emptyFakeState;
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60 private Path.Matcher scope = new Path.Matcher.Any();
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63 public HgStatusCollector(HgRepository hgRepo) {
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64 this.repo = hgRepo;
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65 cache = new IntMap<ManifestRevision>(cacheMaxSize);
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66 cacheNodes = new Pool<Nodeid>();
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67 cacheFilenames = new Pool<Path>();
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69 emptyFakeState = createEmptyManifestRevision();
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70 }
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72 public HgRepository getRepo() {
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73 return repo;
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74 }
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76 private ManifestRevision get(int rev) {
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77 ManifestRevision i = cache.get(rev);
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78 if (i == null) {
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79 if (rev == -1) {
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80 return emptyFakeState;
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81 }
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82 ensureCacheSize();
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83 i = new ManifestRevision(cacheNodes, cacheFilenames);
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84 cache.put(rev, i);
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85 repo.getManifest().walk(rev, rev, i);
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86 }
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87 return i;
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88 }
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90 private boolean cached(int revision) {
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91 return cache.containsKey(revision) || revision == -1;
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92 }
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94 private void ensureCacheSize() {
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95 if (cache.size() > cacheMaxSize) {
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96 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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97 cache.removeFromStart(cache.size() - cacheMaxSize + 1 /* room for new element */);
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98 }
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99 }
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101 private void initCacheRange(int minRev, int maxRev) {
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102 ensureCacheSize();
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103 // In fact, walk(minRev, maxRev) doesn't imply
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104 // there would be maxRev-minRev+1 revisions visited. For example,
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105 // check cpython repo with 'hg log -r 22418:22420 --debug' and admire
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106 // manifest revisions 66650, 21683, 21684. Thus, innocent walk(22418,22420) results in 40k+ revisions and OOME
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107 // Instead, be explicit of what revisions are of interest
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108 assert minRev <= maxRev;
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109 int[] revisionsToCollect = new int[maxRev - minRev + 1];
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110 for (int x = minRev, i = 0; x <= maxRev; i++, x++) {
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111 revisionsToCollect[i] = x;
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112 }
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113 repo.getManifest().walk(new HgManifest.Inspector2() {
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114 private ManifestRevision delegate;
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115 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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116
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117 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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118 assert delegate == null;
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119 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never -1 here
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120 cacheHit = true;
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121 } else {
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122 cache.put(changelogRevision, delegate = new ManifestRevision(cacheNodes, cacheFilenames));
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123 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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124 // otherwise remove entries we just added
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125 delegate.begin(manifestRevision, nid, changelogRevision);
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126 cacheHit = false;
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127 }
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128 return true;
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129 }
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130
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131 public boolean next(Nodeid nid, String fname, String flags) {
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132 throw new HgBadStateException(HgManifest.Inspector2.class.getName());
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133 }
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134
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135 public boolean next(Nodeid nid, Path fname, HgManifest.Flags flags) {
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136 if (!cacheHit) {
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137 delegate.next(nid, fname, flags);
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138 }
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139 return true;
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140 }
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141
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142 public boolean end(int revision) {
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143 if (!cacheHit) {
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144 delegate.end(revision);
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145 }
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146 cacheHit = false;
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147 delegate = null;
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148 return true;
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149 }
302
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150 }, revisionsToCollect);
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151 }
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152
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153 /*package-local*/ static ManifestRevision createEmptyManifestRevision() {
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154 ManifestRevision fakeEmptyRev = new ManifestRevision(null, null);
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155 fakeEmptyRev.begin(-1, null, -1);
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156 fakeEmptyRev.end(-1);
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157 return fakeEmptyRev;
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158 }
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159
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160 /*package-local*/ ManifestRevision raw(int rev) {
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161 return get(rev);
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162 }
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163 /*package-local*/ PathPool getPathPool() {
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164 if (pathPool == null) {
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165 pathPool = new PathPool(new PathRewrite.Empty());
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166 }
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167 return pathPool;
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168 }
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169
142
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170 /**
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171 * Allows sharing of a common path cache
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172 */
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173 public void setPathPool(PathPool pathPool) {
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174 this.pathPool = pathPool;
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175 }
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176
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177 /**
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178 * Limit activity of the collector to certain sub-tree of the repository.
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179 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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180 */
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181 public void setScope(Path.Matcher scopeMatcher) {
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182 // do not assign null, ever
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183 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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184 }
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185
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186 // hg status --change <rev>
93
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187 public void change(int rev, HgStatusInspector inspector) {
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188 int[] parents = new int[2];
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189 repo.getChangelog().parents(rev, parents, null, null);
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190 walk(parents[0], rev, inspector);
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191 }
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192
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193 // rev1 and rev2 are changelog revision numbers, argument order matters.
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194 // Either rev1 or rev2 may be -1 to indicate comparison to empty repository (XXX this is due to use of
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195 // parents in #change(), I believe. Perhaps, need a constant for this? Otherwise this hidden knowledge gets
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196 // exposed to e.g. Record
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197 public void walk(int rev1, int rev2, HgStatusInspector inspector) {
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198 if (rev1 == rev2) {
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199 throw new IllegalArgumentException();
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200 }
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201 if (inspector == null) {
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202 throw new IllegalArgumentException();
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203 }
218
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204 final int lastManifestRevision = repo.getChangelog().getLastRevision();
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205 if (rev1 == TIP) {
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206 rev1 = lastManifestRevision;
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207 }
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208 if (rev2 == TIP) {
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209 rev2 = lastManifestRevision;
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210 }
282
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211 if (inspector instanceof Record) {
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212 ((Record) inspector).init(rev1, rev2, this);
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213 }
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214 // in fact, rev1 and rev2 are often next (or close) to each other,
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215 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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216 ManifestRevision r1, r2 ;
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217 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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218 if (need1 || need2) {
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219 int minRev, maxRev;
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220 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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221 minRev = rev1 < rev2 ? rev1 : rev2;
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222 maxRev = minRev == rev1 ? rev2 : rev1;
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223 if (minRev > 0) {
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224 minRev--; // expand range a bit
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225 }
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226 initCacheRange(minRev, maxRev);
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227 need1 = need2 = false;
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228 }
197
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229 // either both unknown and far from each other, or just one of them.
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230 // read with neighbors to save potential subsequent calls for neighboring elements
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231 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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232 // which going to be read anyway
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233 if (need1) {
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234 minRev = rev1;
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235 maxRev = rev1 < lastManifestRevision-5 ? rev1+5 : lastManifestRevision;
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236 initCacheRange(minRev, maxRev);
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237 }
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238 if (need2) {
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239 minRev = rev2;
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240 maxRev = rev2 < lastManifestRevision-5 ? rev2+5 : lastManifestRevision;
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241 initCacheRange(minRev, maxRev);
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242 }
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243 }
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244 r1 = get(rev1);
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245 r2 = get(rev2);
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246
285
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247 TreeSet<Path> r1Files = new TreeSet<Path>(r1.files());
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248 for (Path r2fname : r2.files()) {
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249 if (!scope.accept(r2fname)) {
226
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250 continue;
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251 }
285
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252 if (r1Files.remove(r2fname)) {
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253 Nodeid nidR1 = r1.nodeid(r2fname);
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254 Nodeid nidR2 = r2.nodeid(r2fname);
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255 HgManifest.Flags flagsR1 = r1.flags(r2fname);
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256 HgManifest.Flags flagsR2 = r2.flags(r2fname);
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257 if (nidR1.equals(nidR2) && flagsR2 == flagsR1) {
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258 inspector.clean(r2fname);
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259 } else {
285
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260 inspector.modified(r2fname);
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261 }
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262 } else {
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263 try {
285
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264 Path copyTarget = r2fname;
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265 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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266 if (copyOrigin != null) {
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267 inspector.copied(getPathPool().path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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268 } else {
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269 inspector.added(copyTarget);
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270 }
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271 } catch (HgDataStreamException ex) {
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272 ex.printStackTrace();
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273 // FIXME perhaps, shall record this exception to dedicated mediator and continue
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274 // for a single file not to be irresolvable obstacle for a status operation
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275 }
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276 }
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277 }
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278 for (Path r1fname : r1Files) {
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279 if (scope.accept(r1fname)) {
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280 inspector.removed(r1fname);
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281 }
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282 }
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283 }
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285 public Record status(int rev1, int rev2) {
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286 Record rv = new Record();
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287 walk(rev1, rev2, rv);
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288 return rv;
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289 }
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290
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291 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<Path> originals, int originalChangelogRevision) throws HgDataStreamException {
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292 HgDataFile df = hgRepo.getFileNode(fname);
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293 while (df.isCopy()) {
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294 Path original = df.getCopySourceName();
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295 if (originals.contains(original)) {
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296 df = hgRepo.getFileNode(original);
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297 int changelogRevision = df.getChangesetLocalRevision(0);
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298 if (changelogRevision <= originalChangelogRevision) {
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299 // copy/rename source was known prior to rev1
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300 // (both r1Files.contains is true and original was created earlier than rev1)
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301 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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302 // might get removed somewhere in between (changelogRevision < R < rev1)
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303 return original;
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304 }
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305 break; // copy/rename done later
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306 }
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307 df = hgRepo.getFileNode(original); // try more steps away
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308 }
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309 return null;
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310 }
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311
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312 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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313 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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314 public static class Record implements HgStatusInspector {
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315 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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316 private Map<Path, Path> copied;
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317
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318 private int startRev, endRev;
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319 private HgStatusCollector statusHelper;
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320
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321 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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322 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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323 // implicit reference to StatusCollector) may be better?
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324 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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325 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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326 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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327 // how to supply [start..end] values there easily
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328 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
64
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329 startRev = startRevision;
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330 endRev = endRevision;
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331 statusHelper = self;
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332 }
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333
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334 public Nodeid nodeidBeforeChange(Path fname) {
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335 if (statusHelper == null || startRev == BAD_REVISION) {
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336 return null;
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337 }
64
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338 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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339 return null;
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340 }
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341 return statusHelper.raw(startRev).nodeid(fname);
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342 }
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343 public Nodeid nodeidAfterChange(Path fname) {
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344 if (statusHelper == null || endRev == BAD_REVISION) {
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345 return null;
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346 }
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347 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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348 return null;
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349 }
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350 return statusHelper.raw(endRev).nodeid(fname);
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351 }
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352
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353 public List<Path> getModified() {
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354 return proper(modified);
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355 }
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356
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357 public List<Path> getAdded() {
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358 return proper(added);
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359 }
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360
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361 public List<Path> getRemoved() {
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362 return proper(removed);
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363 }
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364
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365 public Map<Path,Path> getCopied() {
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366 if (copied == null) {
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367 return Collections.emptyMap();
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368 }
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369 return Collections.unmodifiableMap(copied);
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370 }
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371
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372 public List<Path> getClean() {
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373 return proper(clean);
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374 }
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375
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376 public List<Path> getMissing() {
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377 return proper(missing);
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378 }
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379
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380 public List<Path> getUnknown() {
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381 return proper(unknown);
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382 }
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383
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384 public List<Path> getIgnored() {
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385 return proper(ignored);
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386 }
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387
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388 private List<Path> proper(List<Path> l) {
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389 if (l == null) {
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390 return Collections.emptyList();
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391 }
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392 return Collections.unmodifiableList(l);
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393 }
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394
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395 //
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396 //
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397
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398 public void modified(Path fname) {
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399 modified = doAdd(modified, fname);
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400 }
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401
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402 public void added(Path fname) {
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403 added = doAdd(added, fname);
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404 }
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405
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406 public void copied(Path fnameOrigin, Path fnameAdded) {
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407 if (copied == null) {
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408 copied = new LinkedHashMap<Path, Path>();
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409 }
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6f1b88693d48 Complete refactoring to org.tmatesoft
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410 added(fnameAdded);
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411 copied.put(fnameAdded, fnameOrigin);
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412 }
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413
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414 public void removed(Path fname) {
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415 removed = doAdd(removed, fname);
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416 }
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417
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418 public void clean(Path fname) {
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419 clean = doAdd(clean, fname);
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420 }
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421
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422 public void missing(Path fname) {
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423 missing = doAdd(missing, fname);
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424 }
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425
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426 public void unknown(Path fname) {
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427 unknown = doAdd(unknown, fname);
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428 }
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429
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430 public void ignored(Path fname) {
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431 ignored = doAdd(ignored, fname);
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432 }
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433
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434 private static List<Path> doAdd(List<Path> l, Path p) {
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435 if (l == null) {
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436 l = new LinkedList<Path>();
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437 }
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438 l.add(p);
55
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439 return l;
05829a70b30b Status operation extracted into separate, cache-friendly class
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440 }
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441 }
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442
05829a70b30b Status operation extracted into separate, cache-friendly class
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443 }