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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 266:0a2f445de774

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Improve manifest parsing: reduce number of arrays instantiated for Nodeid
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Aug 2011 04:59:32 +0200
parents 3fbfce107f94
children 81e9a3c9bafe
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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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.SortedMap;
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29 import java.util.TreeMap;
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30 import java.util.TreeSet;
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31
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32 import org.tmatesoft.hg.core.HgDataStreamException;
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33 import org.tmatesoft.hg.core.Nodeid;
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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 SortedMap<Integer, 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<String> cacheFilenames; // XXX in fact, need to think if use of PathPool directly instead is better solution
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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 TreeMap<Integer, ManifestRevision>();
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66 cacheNodes = new Pool<Nodeid>();
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67 cacheFilenames = new Pool<String>();
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69 emptyFakeState = new ManifestRevision(null, null);
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70 emptyFakeState.begin(-1, null, -1);
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71 emptyFakeState.end(-1);
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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 while (cache.size() > cacheMaxSize) {
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85 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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86 cache.remove(cache.firstKey());
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87 }
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88 i = new ManifestRevision(cacheNodes, cacheFilenames);
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89 cache.put(rev, i);
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90 repo.getManifest().walk(rev, rev, i);
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91 }
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92 return i;
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93 }
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95 private boolean cached(int revision) {
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96 return cache.containsKey(revision) || revision == -1;
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97 }
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99 private void initCacheRange(int minRev, int maxRev) {
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100 while (cache.size() > cacheMaxSize) {
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101 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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102 cache.remove(cache.firstKey());
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103 }
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104 repo.getManifest().walk(minRev, maxRev, new HgManifest.Inspector() {
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105 private ManifestRevision delegate;
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106 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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108 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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109 assert delegate == null;
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110 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never -1 here
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111 cacheHit = true;
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112 } else {
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113 cache.put(changelogRevision, delegate = new ManifestRevision(cacheNodes, cacheFilenames));
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114 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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115 // otherwise remove entries we just added
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116 delegate.begin(manifestRevision, nid, changelogRevision);
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117 cacheHit = false;
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118 }
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119 return true;
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120 }
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121
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122 public boolean next(Nodeid nid, String fname, String flags) {
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123 if (!cacheHit) {
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124 delegate.next(nid, fname, flags);
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125 }
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126 return true;
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127 }
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128
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129 public boolean end(int revision) {
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130 if (!cacheHit) {
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131 delegate.end(revision);
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132 }
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133 cacheHit = false;
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134 delegate = null;
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135 return true;
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136 }
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137 });
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138 }
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139
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140 /*package-local*/ ManifestRevision raw(int rev) {
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141 return get(rev);
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142 }
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143 /*package-local*/ PathPool getPathPool() {
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144 if (pathPool == null) {
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145 pathPool = new PathPool(new PathRewrite.Empty());
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146 }
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147 return pathPool;
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148 }
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149
142
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150 /**
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151 * Allows sharing of a common path cache
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152 */
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153 public void setPathPool(PathPool pathPool) {
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154 this.pathPool = pathPool;
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155 }
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156
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157 /**
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158 * Limit activity of the collector to certain sub-tree of the repository.
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159 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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160 */
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161 public void setScope(Path.Matcher scopeMatcher) {
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162 // do not assign null, ever
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163 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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164 }
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165
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166 // hg status --change <rev>
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167 public void change(int rev, HgStatusInspector inspector) {
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168 int[] parents = new int[2];
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169 repo.getChangelog().parents(rev, parents, null, null);
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170 walk(parents[0], rev, inspector);
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171 }
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172
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173 // I assume revision numbers are the same for changelog and manifest - here
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174 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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175 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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176 // rev1 and rev2 may be -1 to indicate comparison to empty repository
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177 // argument order matters
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178 public void walk(int rev1, int rev2, HgStatusInspector inspector) {
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179 if (rev1 == rev2) {
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180 throw new IllegalArgumentException();
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181 }
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182 if (inspector == null) {
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183 throw new IllegalArgumentException();
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184 }
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185 if (inspector instanceof Record) {
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186 ((Record) inspector).init(rev1, rev2, this);
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187 }
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188 final int lastManifestRevision = repo.getChangelog().getLastRevision();
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189 if (rev1 == TIP) {
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190 rev1 = lastManifestRevision;
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191 }
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192 if (rev2 == TIP) {
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193 rev2 = lastManifestRevision;
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194 }
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195 // in fact, rev1 and rev2 are often next (or close) to each other,
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196 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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197 ManifestRevision r1, r2 ;
197
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198 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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199 if (need1 || need2) {
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200 int minRev, maxRev;
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201 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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202 minRev = rev1 < rev2 ? rev1 : rev2;
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203 maxRev = minRev == rev1 ? rev2 : rev1;
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204 if (minRev > 0) {
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205 minRev--; // expand range a bit
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206 }
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207 initCacheRange(minRev, maxRev);
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208 need1 = need2 = false;
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209 }
197
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210 // either both unknown and far from each other, or just one of them.
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211 // read with neighbors to save potential subsequent calls for neighboring elements
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212 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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213 // which going to be read anyway
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214 if (need1) {
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215 minRev = rev1;
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216 maxRev = rev1 < lastManifestRevision-5 ? rev1+5 : lastManifestRevision;
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217 initCacheRange(minRev, maxRev);
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218 }
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219 if (need2) {
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220 minRev = rev2;
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221 maxRev = rev2 < lastManifestRevision-5 ? rev2+5 : lastManifestRevision;
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222 initCacheRange(minRev, maxRev);
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223 }
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224 }
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225 r1 = get(rev1);
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226 r2 = get(rev2);
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227
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228 PathPool pp = getPathPool();
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229 TreeSet<String> r1Files = new TreeSet<String>(r1.files());
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230 for (String fname : r2.files()) {
226
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231 final Path r2filePath = pp.path(fname);
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232 if (!scope.accept(r2filePath)) {
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233 continue;
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234 }
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235 if (r1Files.remove(fname)) {
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236 Nodeid nidR1 = r1.nodeid(fname);
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237 Nodeid nidR2 = r2.nodeid(fname);
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238 String flagsR1 = r1.flags(fname);
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239 String flagsR2 = r2.flags(fname);
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240 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || (flagsR2 != null && flagsR2.equals(flagsR1)))) {
226
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241 inspector.clean(r2filePath);
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242 } else {
226
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243 inspector.modified(r2filePath);
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244 }
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245 } else {
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246 try {
226
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247 Path copyTarget = r2filePath;
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248 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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249 if (copyOrigin != null) {
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250 inspector.copied(pp.path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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251 } else {
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252 inspector.added(copyTarget);
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253 }
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254 } catch (HgDataStreamException ex) {
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255 ex.printStackTrace();
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256 // FIXME perhaps, shall record this exception to dedicated mediator and continue
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257 // for a single file not to be irresolvable obstacle for a status operation
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258 }
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259 }
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260 }
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261 for (String left : r1Files) {
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262 final Path r2filePath = pp.path(left);
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263 if (scope.accept(r2filePath)) {
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264 inspector.removed(r2filePath);
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265 }
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266 }
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267 }
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268
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269 public Record status(int rev1, int rev2) {
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270 Record rv = new Record();
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271 walk(rev1, rev2, rv);
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272 return rv;
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273 }
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274
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275 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<String> originals, int originalChangelogRevision) throws HgDataStreamException {
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276 HgDataFile df = hgRepo.getFileNode(fname);
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277 while (df.isCopy()) {
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278 Path original = df.getCopySourceName();
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279 if (originals.contains(original.toString())) {
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280 df = hgRepo.getFileNode(original);
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281 int changelogRevision = df.getChangesetLocalRevision(0);
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282 if (changelogRevision <= originalChangelogRevision) {
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283 // copy/rename source was known prior to rev1
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284 // (both r1Files.contains is true and original was created earlier than rev1)
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285 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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286 // might get removed somewhere in between (changelogRevision < R < rev1)
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287 return original;
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288 }
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289 break; // copy/rename done later
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290 }
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291 df = hgRepo.getFileNode(original); // try more steps away
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292 }
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293 return null;
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294 }
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295
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296 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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297 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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298 public static class Record implements HgStatusInspector {
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299 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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300 private Map<Path, Path> copied;
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301
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302 private int startRev, endRev;
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303 private HgStatusCollector statusHelper;
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304
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305 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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306 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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307 // implicit reference to StatusCollector) may be better?
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308 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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309 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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310 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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311 // how to supply [start..end] values there easily
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312 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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313 startRev = startRevision;
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314 endRev = endRevision;
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315 statusHelper = self;
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316 }
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317
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318 public Nodeid nodeidBeforeChange(Path fname) {
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319 if (statusHelper == null || startRev == BAD_REVISION) {
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320 return null;
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321 }
64
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322 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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323 return null;
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324 }
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325 return statusHelper.raw(startRev).nodeid(fname.toString());
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326 }
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327 public Nodeid nodeidAfterChange(Path fname) {
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328 if (statusHelper == null || endRev == BAD_REVISION) {
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329 return null;
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330 }
64
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331 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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332 return null;
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333 }
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334 return statusHelper.raw(endRev).nodeid(fname.toString());
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335 }
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336
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337 public List<Path> getModified() {
55
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338 return proper(modified);
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339 }
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340
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341 public List<Path> getAdded() {
55
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342 return proper(added);
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343 }
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344
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345 public List<Path> getRemoved() {
55
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346 return proper(removed);
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347 }
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348
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349 public Map<Path,Path> getCopied() {
55
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350 if (copied == null) {
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351 return Collections.emptyMap();
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352 }
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353 return Collections.unmodifiableMap(copied);
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354 }
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355
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356 public List<Path> getClean() {
55
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357 return proper(clean);
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358 }
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359
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360 public List<Path> getMissing() {
55
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361 return proper(missing);
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362 }
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363
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364 public List<Path> getUnknown() {
55
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365 return proper(unknown);
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366 }
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367
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368 public List<Path> getIgnored() {
55
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369 return proper(ignored);
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370 }
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371
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372 private List<Path> proper(List<Path> l) {
55
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373 if (l == null) {
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374 return Collections.emptyList();
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375 }
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376 return Collections.unmodifiableList(l);
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377 }
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378
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379 //
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380 //
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381
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382 public void modified(Path fname) {
55
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383 modified = doAdd(modified, fname);
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384 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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385
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386 public void added(Path fname) {
55
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diff changeset
387 added = doAdd(added, fname);
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diff changeset
388 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
389
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diff changeset
390 public void copied(Path fnameOrigin, Path fnameAdded) {
55
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diff changeset
391 if (copied == null) {
93
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diff changeset
392 copied = new LinkedHashMap<Path, Path>();
55
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diff changeset
393 }
74
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
394 added(fnameAdded);
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
395 copied.put(fnameAdded, fnameOrigin);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
396 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
397
93
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diff changeset
398 public void removed(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
399 removed = doAdd(removed, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
400 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
401
93
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diff changeset
402 public void clean(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
403 clean = doAdd(clean, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
404 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
405
93
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diff changeset
406 public void missing(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
407 missing = doAdd(missing, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
408 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
409
93
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diff changeset
410 public void unknown(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
411 unknown = doAdd(unknown, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
412 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
413
93
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diff changeset
414 public void ignored(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
415 ignored = doAdd(ignored, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
416 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
417
93
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diff changeset
418 private static List<Path> doAdd(List<Path> l, Path p) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
419 if (l == null) {
93
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diff changeset
420 l = new LinkedList<Path>();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
421 }
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diff changeset
422 l.add(p);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
423 return l;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
424 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
425 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
426
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
427 }