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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents 678e326fd27c
children 5f9073eabf06
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.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>
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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 }
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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) {
285
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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);
226
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281 }
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282 }
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283 }
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284
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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);
320
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293 if (!df.exists()) {
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294 String msg = String.format("Didn't find file '%s' in the repo. Perhaps, bad storage name conversion?", fname);
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295 throw new HgDataStreamException(fname, msg, null).setRevisionNumber(originalChangelogRevision);
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296 }
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297 while (df.isCopy()) {
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298 Path original = df.getCopySourceName();
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299 if (originals.contains(original)) {
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300 df = hgRepo.getFileNode(original);
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301 int changelogRevision = df.getChangesetLocalRevision(0);
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302 if (changelogRevision <= originalChangelogRevision) {
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303 // copy/rename source was known prior to rev1
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304 // (both r1Files.contains is true and original was created earlier than rev1)
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305 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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306 // might get removed somewhere in between (changelogRevision < R < rev1)
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307 return original;
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308 }
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309 break; // copy/rename done later
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310 }
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311 df = hgRepo.getFileNode(original); // try more steps away
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312 }
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313 return null;
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314 }
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315
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316 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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317 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
316
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318 /**
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319 * Straightforward {@link HgStatusInspector} implementation that collects all status values.
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320 *
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321 * <p>Naturally, {@link Record Records} originating from {@link HgStatusCollector} would report only <em>modified, added,
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322 * removed</em> and <em>clean</em> values, other are available only when using {@link Record} with {@link HgWorkingCopyStatusCollector}.
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323 *
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324 * <p>Note, this implementation records copied files as added, thus key values in {@link #getCopied()} map are subset of paths
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325 * from {@link #getAdded()}.
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326 */
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327 public static class Record implements HgStatusInspector {
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328 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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329 private Map<Path, Path> copied;
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330
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331 private int startRev, endRev;
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332 private HgStatusCollector statusHelper;
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333
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334 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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335 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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336 // implicit reference to StatusCollector) may be better?
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337 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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338 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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339 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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340 // how to supply [start..end] values there easily
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341 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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342 startRev = startRevision;
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343 endRev = endRevision;
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344 statusHelper = self;
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345 }
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346
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347 public Nodeid nodeidBeforeChange(Path fname) {
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348 if (statusHelper == null || startRev == BAD_REVISION) {
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349 return null;
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350 }
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351 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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352 return null;
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353 }
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354 return statusHelper.raw(startRev).nodeid(fname);
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355 }
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356 public Nodeid nodeidAfterChange(Path fname) {
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357 if (statusHelper == null || endRev == BAD_REVISION) {
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358 return null;
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359 }
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360 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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361 return null;
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362 }
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363 return statusHelper.raw(endRev).nodeid(fname);
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364 }
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365
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366 public List<Path> getModified() {
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367 return proper(modified);
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368 }
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369
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370 public List<Path> getAdded() {
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371 return proper(added);
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372 }
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373
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374 public List<Path> getRemoved() {
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375 return proper(removed);
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376 }
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377
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378 /**
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379 * Map files from {@link #getAdded()} to their original filenames, if were copied/moved.
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380 */
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381 public Map<Path,Path> getCopied() {
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382 if (copied == null) {
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383 return Collections.emptyMap();
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384 }
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385 return Collections.unmodifiableMap(copied);
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386 }
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387
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388 public List<Path> getClean() {
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389 return proper(clean);
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390 }
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391
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392 public List<Path> getMissing() {
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393 return proper(missing);
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394 }
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395
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396 public List<Path> getUnknown() {
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397 return proper(unknown);
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398 }
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399
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400 public List<Path> getIgnored() {
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401 return proper(ignored);
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402 }
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403
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404 private static List<Path> proper(List<Path> l) {
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405 if (l == null) {
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406 return Collections.emptyList();
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407 }
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408 return Collections.unmodifiableList(l);
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409 }
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410
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411 //
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412 //
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413
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414 public void modified(Path fname) {
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415 modified = doAdd(modified, fname);
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416 }
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417
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418 public void added(Path fname) {
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419 added = doAdd(added, fname);
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420 }
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421
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422 public void copied(Path fnameOrigin, Path fnameAdded) {
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423 if (copied == null) {
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424 copied = new LinkedHashMap<Path, Path>();
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425 }
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426 added(fnameAdded);
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427 copied.put(fnameAdded, fnameOrigin);
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428 }
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429
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430 public void removed(Path fname) {
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431 removed = doAdd(removed, fname);
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432 }
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433
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434 public void clean(Path fname) {
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435 clean = doAdd(clean, fname);
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436 }
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437
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438 public void missing(Path fname) {
55
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439 missing = doAdd(missing, fname);
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440 }
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441
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442 public void unknown(Path fname) {
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443 unknown = doAdd(unknown, fname);
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444 }
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445
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446 public void ignored(Path fname) {
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447 ignored = doAdd(ignored, fname);
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448 }
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449
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450 private static List<Path> doAdd(List<Path> l, Path p) {
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451 if (l == null) {
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d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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452 l = new LinkedList<Path>();
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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453 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 90
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454 l.add(p);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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455 return l;
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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456 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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457 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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458
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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459 }