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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 396:0ae53c32ecef

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Straighten out exceptions thrown when file access failed - three is too much
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 23 Feb 2012 01:06:24 +0100
parents 2fadf8695f8a
children 2747b0723867
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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.HgException;
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32 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.internal.IntMap;
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35 import org.tmatesoft.hg.internal.ManifestRevision;
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36 import org.tmatesoft.hg.internal.Pool;
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37 import org.tmatesoft.hg.util.Path;
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38 import org.tmatesoft.hg.util.PathPool;
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39 import org.tmatesoft.hg.util.PathRewrite;
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41
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42 /**
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43 * RevisionWalker?
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44 *
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 public class HgStatusCollector {
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50 private final HgRepository repo;
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51 private final IntMap<ManifestRevision> cache; // sparse array, in fact
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52 // with cpython repository, ~70 000 changes, complete Log (direct out, no reverse) output
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53 // no cache limit, no nodeids and fname caching - OOME on changeset 1035
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54 // no cache limit, but with cached nodeids and filenames - 1730+
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55 // cache limit 100 - 19+ minutes to process 10000, and still working (too long, stopped)
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56 private final int cacheMaxSize = 50; // do not keep too much manifest revisions
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57 private PathPool pathPool;
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58 private final Pool<Nodeid> cacheNodes;
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59 private final Pool<Path> cacheFilenames;
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60 private final ManifestRevision emptyFakeState;
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61 private Path.Matcher scope = new Path.Matcher.Any();
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64 public HgStatusCollector(HgRepository hgRepo) {
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65 this.repo = hgRepo;
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66 cache = new IntMap<ManifestRevision>(cacheMaxSize);
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67 cacheNodes = new Pool<Nodeid>();
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68 cacheFilenames = new Pool<Path>();
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70 emptyFakeState = createEmptyManifestRevision();
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71 }
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73 public HgRepository getRepo() {
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74 return repo;
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75 }
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77 private ManifestRevision get(int rev) throws HgInvalidControlFileException {
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78 ManifestRevision i = cache.get(rev);
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79 if (i == null) {
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80 if (rev == -1) {
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81 return emptyFakeState;
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82 }
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83 ensureCacheSize();
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84 i = new ManifestRevision(cacheNodes, cacheFilenames);
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85 cache.put(rev, i);
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86 repo.getManifest().walk(rev, rev, i);
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87 }
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88 return i;
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89 }
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91 private boolean cached(int revision) {
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92 return cache.containsKey(revision) || revision == -1;
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93 }
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95 private void ensureCacheSize() {
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96 if (cache.size() > cacheMaxSize) {
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97 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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98 cache.removeFromStart(cache.size() - cacheMaxSize + 1 /* room for new element */);
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99 }
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100 }
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102 private void initCacheRange(int minRev, int maxRev) throws HgInvalidControlFileException {
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103 ensureCacheSize();
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104 // In fact, walk(minRev, maxRev) doesn't imply
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105 // there would be maxRev-minRev+1 revisions visited. For example,
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106 // check cpython repo with 'hg log -r 22418:22420 --debug' and admire
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107 // manifest revisions 66650, 21683, 21684. Thus, innocent walk(22418,22420) results in 40k+ revisions and OOME
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108 // Instead, be explicit of what revisions are of interest
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109 assert minRev <= maxRev;
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110 int[] revisionsToCollect = new int[maxRev - minRev + 1];
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111 for (int x = minRev, i = 0; x <= maxRev; i++, x++) {
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112 revisionsToCollect[i] = x;
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113 }
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114 repo.getManifest().walk(new HgManifest.Inspector2() {
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115 private ManifestRevision delegate;
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116 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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117
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118 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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119 assert delegate == null;
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120 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never -1 here
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121 cacheHit = true;
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122 } else {
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123 cache.put(changelogRevision, delegate = new ManifestRevision(cacheNodes, cacheFilenames));
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124 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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125 // otherwise remove entries we just added
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126 delegate.begin(manifestRevision, nid, changelogRevision);
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127 cacheHit = false;
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128 }
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129 return true;
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130 }
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131
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132 public boolean next(Nodeid nid, String fname, String flags) {
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133 throw new HgBadStateException(HgManifest.Inspector2.class.getName());
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134 }
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135
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136 public boolean next(Nodeid nid, Path fname, HgManifest.Flags flags) {
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137 if (!cacheHit) {
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138 delegate.next(nid, fname, flags);
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139 }
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140 return true;
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141 }
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142
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143 public boolean end(int revision) {
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144 if (!cacheHit) {
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145 delegate.end(revision);
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146 }
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147 cacheHit = false;
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148 delegate = null;
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149 return true;
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150 }
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151 }, revisionsToCollect);
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152 }
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153
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154 /*package-local*/ static ManifestRevision createEmptyManifestRevision() {
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155 ManifestRevision fakeEmptyRev = new ManifestRevision(null, null);
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156 fakeEmptyRev.begin(-1, null, -1);
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157 fakeEmptyRev.end(-1);
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158 return fakeEmptyRev;
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159 }
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160
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161 /*package-local*/ ManifestRevision raw(int rev) throws HgInvalidControlFileException {
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162 return get(rev);
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163 }
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164 /*package-local*/ PathPool getPathPool() {
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165 if (pathPool == null) {
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166 pathPool = new PathPool(new PathRewrite.Empty());
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167 }
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168 return pathPool;
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169 }
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170
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171 /**
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172 * Allows sharing of a common path cache
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173 */
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174 public void setPathPool(PathPool pathPool) {
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175 this.pathPool = pathPool;
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176 }
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177
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178 /**
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179 * Limit activity of the collector to certain sub-tree of the repository.
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180 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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181 */
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182 public void setScope(Path.Matcher scopeMatcher) {
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183 // do not assign null, ever
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184 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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185 }
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186
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187 // hg status --change <rev>
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188 public void change(int rev, HgStatusInspector inspector) throws /*FIXME HInvalidRevisionException,*/ HgInvalidControlFileException {
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189 int[] parents = new int[2];
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190 repo.getChangelog().parents(rev, parents, null, null);
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191 walk(parents[0], rev, inspector);
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192 }
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193
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194 // rev1 and rev2 are changelog revision numbers, argument order matters.
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195 // Either rev1 or rev2 may be -1 to indicate comparison to empty repository (XXX this is due to use of
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196 // parents in #change(), I believe. Perhaps, need a constant for this? Otherwise this hidden knowledge gets
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197 // exposed to e.g. Record
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198 public void walk(int rev1, int rev2, HgStatusInspector inspector) throws /*FIXME HInvalidRevisionException,*/ HgInvalidControlFileException {
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199 if (rev1 == rev2) {
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200 throw new IllegalArgumentException();
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201 }
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202 if (inspector == null) {
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203 throw new IllegalArgumentException();
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204 }
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205 final int lastManifestRevision = repo.getChangelog().getLastRevision();
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206 if (rev1 == TIP) {
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207 rev1 = lastManifestRevision;
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208 }
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209 if (rev2 == TIP) {
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210 rev2 = lastManifestRevision;
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211 }
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212 if (inspector instanceof Record) {
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213 ((Record) inspector).init(rev1, rev2, this);
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214 }
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215 // in fact, rev1 and rev2 are often next (or close) to each other,
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216 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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217 ManifestRevision r1, r2 ;
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218 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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219 if (need1 || need2) {
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220 int minRev, maxRev;
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221 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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222 minRev = rev1 < rev2 ? rev1 : rev2;
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223 maxRev = minRev == rev1 ? rev2 : rev1;
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224 if (minRev > 0) {
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225 minRev--; // expand range a bit
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226 }
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227 initCacheRange(minRev, maxRev);
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228 need1 = need2 = false;
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229 }
197
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230 // either both unknown and far from each other, or just one of them.
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231 // read with neighbors to save potential subsequent calls for neighboring elements
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232 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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233 // which going to be read anyway
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234 if (need1) {
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235 minRev = rev1;
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236 maxRev = rev1 < lastManifestRevision-5 ? rev1+5 : lastManifestRevision;
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237 initCacheRange(minRev, maxRev);
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238 }
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239 if (need2) {
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240 minRev = rev2;
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241 maxRev = rev2 < lastManifestRevision-5 ? rev2+5 : lastManifestRevision;
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242 initCacheRange(minRev, maxRev);
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243 }
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244 }
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245 r1 = get(rev1);
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246 r2 = get(rev2);
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247
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248 TreeSet<Path> r1Files = new TreeSet<Path>(r1.files());
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249 for (Path r2fname : r2.files()) {
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250 if (!scope.accept(r2fname)) {
226
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251 continue;
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252 }
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253 if (r1Files.remove(r2fname)) {
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254 Nodeid nidR1 = r1.nodeid(r2fname);
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255 Nodeid nidR2 = r2.nodeid(r2fname);
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256 HgManifest.Flags flagsR1 = r1.flags(r2fname);
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257 HgManifest.Flags flagsR2 = r2.flags(r2fname);
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258 if (nidR1.equals(nidR2) && flagsR2 == flagsR1) {
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259 inspector.clean(r2fname);
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260 } else {
285
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261 inspector.modified(r2fname);
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262 }
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263 } else {
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264 try {
285
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265 Path copyTarget = r2fname;
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266 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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267 if (copyOrigin != null) {
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268 inspector.copied(getPathPool().path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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269 } else {
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270 inspector.added(copyTarget);
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271 }
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272 } catch (HgException ex) {
360
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273 // record exception to a 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 inspector.invalid(r2fname, ex);
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276 }
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277 }
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278 }
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279 for (Path r1fname : r1Files) {
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280 if (scope.accept(r1fname)) {
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281 inspector.removed(r1fname);
226
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282 }
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283 }
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284 }
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285
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286 public Record status(int rev1, int rev2) throws /*FIXME HInvalidRevisionException,*/ HgInvalidControlFileException {
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287 Record rv = new Record();
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288 walk(rev1, rev2, rv);
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289 return rv;
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290 }
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291
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292 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<Path> originals, int originalChangelogRevision) throws HgException {
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293 HgDataFile df = hgRepo.getFileNode(fname);
320
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294 if (!df.exists()) {
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295 String msg = String.format("Didn't find file '%s' in the repo. Perhaps, bad storage name conversion?", fname);
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296 throw new HgException(msg).setFileName(fname).setRevisionIndex(originalChangelogRevision);
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297 }
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298 while (df.isCopy()) {
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299 Path original = df.getCopySourceName();
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300 if (originals.contains(original)) {
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301 df = hgRepo.getFileNode(original);
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302 int changelogRevision = df.getChangesetRevisionIndex(0);
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303 if (changelogRevision <= originalChangelogRevision) {
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304 // copy/rename source was known prior to rev1
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305 // (both r1Files.contains is true and original was created earlier than rev1)
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306 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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307 // might get removed somewhere in between (changelogRevision < R < rev1)
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308 return original;
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309 }
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310 break; // copy/rename done later
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311 }
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312 df = hgRepo.getFileNode(original); // try more steps away
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313 }
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314 return null;
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315 }
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316
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317 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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318 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
316
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319 /**
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320 * Straightforward {@link HgStatusInspector} implementation that collects all status values.
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321 *
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322 * <p>Naturally, {@link Record Records} originating from {@link HgStatusCollector} would report only <em>modified, added,
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323 * removed</em> and <em>clean</em> values, other are available only when using {@link Record} with {@link HgWorkingCopyStatusCollector}.
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324 *
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325 * <p>Note, this implementation records copied files as added, thus key values in {@link #getCopied()} map are subset of paths
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326 * from {@link #getAdded()}.
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327 */
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328 public static class Record implements HgStatusInspector {
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329 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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330 private Map<Path, Path> copied;
360
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331 private Map<Path, Exception> failures;
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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) throws HgInvalidControlFileException {
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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) throws HgInvalidControlFileException {
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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 }
360
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405
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406 public Map<Path, Exception> getInvalid() {
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407 if (failures == null) {
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408 return Collections.emptyMap();
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409 }
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410 return Collections.unmodifiableMap(failures);
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411 }
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412
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413 private static List<Path> proper(List<Path> l) {
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414 if (l == null) {
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415 return Collections.emptyList();
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416 }
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417 return Collections.unmodifiableList(l);
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418 }
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419
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420 //
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421 //
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422
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423 public void modified(Path fname) {
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424 modified = doAdd(modified, fname);
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425 }
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426
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427 public void added(Path fname) {
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428 added = doAdd(added, fname);
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429 }
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430
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431 public void copied(Path fnameOrigin, Path fnameAdded) {
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432 if (copied == null) {
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433 copied = new LinkedHashMap<Path, Path>();
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434 }
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435 added(fnameAdded);
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436 copied.put(fnameAdded, fnameOrigin);
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437 }
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438
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439 public void removed(Path fname) {
55
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440 removed = doAdd(removed, fname);
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441 }
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442
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443 public void clean(Path fname) {
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444 clean = doAdd(clean, fname);
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445 }
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446
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447 public void missing(Path fname) {
55
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448 missing = doAdd(missing, fname);
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449 }
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450
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451 public void unknown(Path fname) {
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452 unknown = doAdd(unknown, fname);
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453 }
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454
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455 public void ignored(Path fname) {
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456 ignored = doAdd(ignored, fname);
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457 }
360
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458
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459 public void invalid(Path fname, Exception ex) {
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460 if (failures == null) {
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461 failures = new LinkedHashMap<Path, Exception>();
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462 }
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463 failures.put(fname, ex);
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464 }
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465
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466 private static List<Path> doAdd(List<Path> l, Path p) {
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467 if (l == null) {
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468 l = new LinkedList<Path>();
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469 }
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470 l.add(p);
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471 return l;
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472 }
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473 }
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474
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475 }