Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 355:f2c11fe7f3e9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Newline filter shall respect whole stream when deciding whether to process line terminators, hence added stream preview functionality
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 06 Dec 2011 12:57:21 +0100
parents 5f9073eabf06
children 150500515714
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.TreeSet;
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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.HgException;
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33 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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34 import org.tmatesoft.hg.core.Nodeid;
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35 import org.tmatesoft.hg.internal.IntMap;
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36 import org.tmatesoft.hg.internal.ManifestRevision;
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37 import org.tmatesoft.hg.internal.Pool;
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38 import org.tmatesoft.hg.util.Path;
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39 import org.tmatesoft.hg.util.PathPool;
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40 import org.tmatesoft.hg.util.PathRewrite;
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43 /**
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44 * RevisionWalker?
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45 *
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46 * @author Artem Tikhomirov
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47 * @author TMate Software Ltd.
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48 */
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49 public class HgStatusCollector {
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51 private final HgRepository repo;
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52 private final IntMap<ManifestRevision> cache; // sparse array, in fact
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53 // with cpython repository, ~70 000 changes, complete Log (direct out, no reverse) output
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54 // no cache limit, no nodeids and fname caching - OOME on changeset 1035
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55 // no cache limit, but with cached nodeids and filenames - 1730+
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56 // cache limit 100 - 19+ minutes to process 10000, and still working (too long, stopped)
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57 private final int cacheMaxSize = 50; // do not keep too much manifest revisions
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58 private PathPool pathPool;
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59 private final Pool<Nodeid> cacheNodes;
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60 private final Pool<Path> cacheFilenames;
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61 private final ManifestRevision emptyFakeState;
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62 private Path.Matcher scope = new Path.Matcher.Any();
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65 public HgStatusCollector(HgRepository hgRepo) {
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66 this.repo = hgRepo;
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67 cache = new IntMap<ManifestRevision>(cacheMaxSize);
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68 cacheNodes = new Pool<Nodeid>();
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69 cacheFilenames = new Pool<Path>();
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71 emptyFakeState = createEmptyManifestRevision();
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72 }
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74 public HgRepository getRepo() {
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75 return repo;
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76 }
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78 private ManifestRevision get(int rev) {
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79 ManifestRevision i = cache.get(rev);
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80 if (i == null) {
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81 if (rev == -1) {
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82 return emptyFakeState;
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83 }
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84 ensureCacheSize();
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85 i = new ManifestRevision(cacheNodes, cacheFilenames);
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86 cache.put(rev, i);
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87 repo.getManifest().walk(rev, rev, i);
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88 }
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89 return i;
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90 }
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92 private boolean cached(int revision) {
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93 return cache.containsKey(revision) || revision == -1;
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94 }
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96 private void ensureCacheSize() {
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97 if (cache.size() > cacheMaxSize) {
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98 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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99 cache.removeFromStart(cache.size() - cacheMaxSize + 1 /* room for new element */);
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100 }
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101 }
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102
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103 private void initCacheRange(int minRev, int maxRev) {
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104 ensureCacheSize();
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105 // In fact, walk(minRev, maxRev) doesn't imply
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106 // there would be maxRev-minRev+1 revisions visited. For example,
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107 // check cpython repo with 'hg log -r 22418:22420 --debug' and admire
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108 // manifest revisions 66650, 21683, 21684. Thus, innocent walk(22418,22420) results in 40k+ revisions and OOME
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109 // Instead, be explicit of what revisions are of interest
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110 assert minRev <= maxRev;
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111 int[] revisionsToCollect = new int[maxRev - minRev + 1];
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112 for (int x = minRev, i = 0; x <= maxRev; i++, x++) {
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113 revisionsToCollect[i] = x;
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114 }
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115 repo.getManifest().walk(new HgManifest.Inspector2() {
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116 private ManifestRevision delegate;
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117 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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118
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119 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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120 assert delegate == null;
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121 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never -1 here
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122 cacheHit = true;
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123 } else {
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124 cache.put(changelogRevision, delegate = new ManifestRevision(cacheNodes, cacheFilenames));
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125 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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126 // otherwise remove entries we just added
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127 delegate.begin(manifestRevision, nid, changelogRevision);
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128 cacheHit = false;
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129 }
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130 return true;
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131 }
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132
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133 public boolean next(Nodeid nid, String fname, String flags) {
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134 throw new HgBadStateException(HgManifest.Inspector2.class.getName());
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135 }
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136
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137 public boolean next(Nodeid nid, Path fname, HgManifest.Flags flags) {
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138 if (!cacheHit) {
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139 delegate.next(nid, fname, flags);
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140 }
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141 return true;
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142 }
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143
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144 public boolean end(int revision) {
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145 if (!cacheHit) {
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146 delegate.end(revision);
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147 }
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148 cacheHit = false;
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149 delegate = null;
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150 return true;
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151 }
302
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152 }, revisionsToCollect);
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153 }
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154
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155 /*package-local*/ static ManifestRevision createEmptyManifestRevision() {
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156 ManifestRevision fakeEmptyRev = new ManifestRevision(null, null);
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157 fakeEmptyRev.begin(-1, null, -1);
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158 fakeEmptyRev.end(-1);
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159 return fakeEmptyRev;
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160 }
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161
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162 /*package-local*/ ManifestRevision raw(int rev) {
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163 return get(rev);
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164 }
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165 /*package-local*/ PathPool getPathPool() {
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166 if (pathPool == null) {
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167 pathPool = new PathPool(new PathRewrite.Empty());
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168 }
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169 return pathPool;
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170 }
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171
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172 /**
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173 * Allows sharing of a common path cache
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174 */
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175 public void setPathPool(PathPool pathPool) {
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176 this.pathPool = pathPool;
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177 }
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178
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179 /**
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180 * Limit activity of the collector to certain sub-tree of the repository.
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181 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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182 */
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183 public void setScope(Path.Matcher scopeMatcher) {
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184 // do not assign null, ever
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185 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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186 }
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187
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188 // hg status --change <rev>
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189 public void change(int rev, HgStatusInspector inspector) {
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190 int[] parents = new int[2];
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191 repo.getChangelog().parents(rev, parents, null, null);
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192 walk(parents[0], rev, inspector);
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193 }
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194
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195 // rev1 and rev2 are changelog revision numbers, argument order matters.
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196 // Either rev1 or rev2 may be -1 to indicate comparison to empty repository (XXX this is due to use of
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197 // parents in #change(), I believe. Perhaps, need a constant for this? Otherwise this hidden knowledge gets
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198 // exposed to e.g. Record
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199 public void walk(int rev1, int rev2, HgStatusInspector inspector) {
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200 if (rev1 == rev2) {
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201 throw new IllegalArgumentException();
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202 }
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203 if (inspector == null) {
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204 throw new IllegalArgumentException();
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205 }
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206 final int lastManifestRevision = repo.getChangelog().getLastRevision();
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207 if (rev1 == TIP) {
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208 rev1 = lastManifestRevision;
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209 }
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210 if (rev2 == TIP) {
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211 rev2 = lastManifestRevision;
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212 }
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213 if (inspector instanceof Record) {
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214 ((Record) inspector).init(rev1, rev2, this);
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215 }
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216 // in fact, rev1 and rev2 are often next (or close) to each other,
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217 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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218 ManifestRevision r1, r2 ;
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219 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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220 if (need1 || need2) {
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221 int minRev, maxRev;
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222 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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223 minRev = rev1 < rev2 ? rev1 : rev2;
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224 maxRev = minRev == rev1 ? rev2 : rev1;
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225 if (minRev > 0) {
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226 minRev--; // expand range a bit
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227 }
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228 initCacheRange(minRev, maxRev);
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229 need1 = need2 = false;
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230 }
197
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231 // either both unknown and far from each other, or just one of them.
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232 // read with neighbors to save potential subsequent calls for neighboring elements
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233 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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234 // which going to be read anyway
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235 if (need1) {
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236 minRev = rev1;
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237 maxRev = rev1 < lastManifestRevision-5 ? rev1+5 : lastManifestRevision;
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238 initCacheRange(minRev, maxRev);
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239 }
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240 if (need2) {
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241 minRev = rev2;
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242 maxRev = rev2 < lastManifestRevision-5 ? rev2+5 : lastManifestRevision;
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243 initCacheRange(minRev, maxRev);
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244 }
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245 }
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246 r1 = get(rev1);
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247 r2 = get(rev2);
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248
285
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249 TreeSet<Path> r1Files = new TreeSet<Path>(r1.files());
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250 for (Path r2fname : r2.files()) {
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251 if (!scope.accept(r2fname)) {
226
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252 continue;
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253 }
285
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254 if (r1Files.remove(r2fname)) {
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255 Nodeid nidR1 = r1.nodeid(r2fname);
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256 Nodeid nidR2 = r2.nodeid(r2fname);
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257 HgManifest.Flags flagsR1 = r1.flags(r2fname);
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258 HgManifest.Flags flagsR2 = r2.flags(r2fname);
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259 if (nidR1.equals(nidR2) && flagsR2 == flagsR1) {
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260 inspector.clean(r2fname);
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261 } else {
285
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262 inspector.modified(r2fname);
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263 }
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264 } else {
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265 try {
285
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266 Path copyTarget = r2fname;
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267 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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268 if (copyOrigin != null) {
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269 inspector.copied(getPathPool().path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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270 } else {
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271 inspector.added(copyTarget);
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272 }
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273 } catch (HgException ex) {
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274 ex.printStackTrace();
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275 // FIXME perhaps, shall record this exception to dedicated mediator and continue
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276 // for a single file not to be irresolvable obstacle for a status operation
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277 }
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278 }
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279 }
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280 for (Path r1fname : r1Files) {
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281 if (scope.accept(r1fname)) {
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282 inspector.removed(r1fname);
226
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283 }
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284 }
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285 }
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286
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287 public Record status(int rev1, int rev2) {
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288 Record rv = new Record();
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289 walk(rev1, rev2, rv);
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290 return rv;
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291 }
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292
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293 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<Path> originals, int originalChangelogRevision) throws HgDataStreamException, HgInvalidControlFileException {
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294 HgDataFile df = hgRepo.getFileNode(fname);
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295 if (!df.exists()) {
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296 String msg = String.format("Didn't find file '%s' in the repo. Perhaps, bad storage name conversion?", fname);
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297 throw new HgDataStreamException(fname, msg, null).setRevisionNumber(originalChangelogRevision);
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298 }
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299 while (df.isCopy()) {
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300 Path original = df.getCopySourceName();
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301 if (originals.contains(original)) {
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302 df = hgRepo.getFileNode(original);
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303 int changelogRevision = df.getChangesetLocalRevision(0);
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304 if (changelogRevision <= originalChangelogRevision) {
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305 // copy/rename source was known prior to rev1
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306 // (both r1Files.contains is true and original was created earlier than rev1)
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307 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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308 // might get removed somewhere in between (changelogRevision < R < rev1)
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309 return original;
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310 }
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311 break; // copy/rename done later
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312 }
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313 df = hgRepo.getFileNode(original); // try more steps away
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314 }
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315 return null;
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316 }
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317
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318 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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319 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
316
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320 /**
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321 * Straightforward {@link HgStatusInspector} implementation that collects all status values.
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322 *
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323 * <p>Naturally, {@link Record Records} originating from {@link HgStatusCollector} would report only <em>modified, added,
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324 * removed</em> and <em>clean</em> values, other are available only when using {@link Record} with {@link HgWorkingCopyStatusCollector}.
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325 *
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326 * <p>Note, this implementation records copied files as added, thus key values in {@link #getCopied()} map are subset of paths
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327 * from {@link #getAdded()}.
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328 */
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329 public static class Record implements HgStatusInspector {
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330 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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331 private Map<Path, Path> copied;
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332
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333 private int startRev, endRev;
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334 private HgStatusCollector statusHelper;
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335
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336 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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337 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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338 // implicit reference to StatusCollector) may be better?
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339 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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340 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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341 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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342 // how to supply [start..end] values there easily
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343 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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344 startRev = startRevision;
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345 endRev = endRevision;
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346 statusHelper = self;
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347 }
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348
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349 public Nodeid nodeidBeforeChange(Path fname) {
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350 if (statusHelper == null || startRev == BAD_REVISION) {
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351 return null;
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352 }
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353 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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354 return null;
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355 }
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356 return statusHelper.raw(startRev).nodeid(fname);
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357 }
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358 public Nodeid nodeidAfterChange(Path fname) {
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359 if (statusHelper == null || endRev == BAD_REVISION) {
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360 return null;
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361 }
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362 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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363 return null;
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364 }
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365 return statusHelper.raw(endRev).nodeid(fname);
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366 }
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367
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368 public List<Path> getModified() {
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369 return proper(modified);
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370 }
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371
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372 public List<Path> getAdded() {
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373 return proper(added);
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374 }
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375
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376 public List<Path> getRemoved() {
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377 return proper(removed);
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378 }
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379
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380 /**
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381 * Map files from {@link #getAdded()} to their original filenames, if were copied/moved.
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382 */
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383 public Map<Path,Path> getCopied() {
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384 if (copied == null) {
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385 return Collections.emptyMap();
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386 }
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387 return Collections.unmodifiableMap(copied);
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388 }
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389
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390 public List<Path> getClean() {
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391 return proper(clean);
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392 }
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393
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394 public List<Path> getMissing() {
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395 return proper(missing);
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396 }
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397
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398 public List<Path> getUnknown() {
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399 return proper(unknown);
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400 }
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401
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402 public List<Path> getIgnored() {
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403 return proper(ignored);
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404 }
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405
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406 private static List<Path> proper(List<Path> l) {
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407 if (l == null) {
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408 return Collections.emptyList();
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409 }
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410 return Collections.unmodifiableList(l);
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411 }
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412
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413 //
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414 //
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415
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416 public void modified(Path fname) {
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417 modified = doAdd(modified, fname);
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418 }
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419
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420 public void added(Path fname) {
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421 added = doAdd(added, fname);
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422 }
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423
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424 public void copied(Path fnameOrigin, Path fnameAdded) {
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425 if (copied == null) {
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426 copied = new LinkedHashMap<Path, Path>();
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427 }
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428 added(fnameAdded);
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429 copied.put(fnameAdded, fnameOrigin);
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430 }
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431
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432 public void removed(Path fname) {
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433 removed = doAdd(removed, fname);
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434 }
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435
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436 public void clean(Path fname) {
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437 clean = doAdd(clean, fname);
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438 }
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439
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440 public void missing(Path fname) {
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441 missing = doAdd(missing, fname);
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442 }
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443
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444 public void unknown(Path fname) {
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445 unknown = doAdd(unknown, fname);
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446 }
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447
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448 public void ignored(Path fname) {
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449 ignored = doAdd(ignored, fname);
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450 }
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451
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452 private static List<Path> doAdd(List<Path> l, Path p) {
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453 if (l == null) {
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454 l = new LinkedList<Path>();
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455 }
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456 l.add(p);
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05829a70b30b Status operation extracted into separate, cache-friendly class
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457 return l;
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458 }
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459 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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460
05829a70b30b Status operation extracted into separate, cache-friendly class
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461 }