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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 247:f052f40839ec

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Issue 9: NPE in getModificationDate for files with status 'Unknown'
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 12 Aug 2011 17:17:37 +0200
parents 1ec6b327a6ac
children 3fbfce107f94
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.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.Pool;
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35 import org.tmatesoft.hg.util.Path;
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36 import org.tmatesoft.hg.util.PathPool;
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37 import org.tmatesoft.hg.util.PathRewrite;
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39
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40 /**
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41 * RevisionWalker?
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42 *
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43 * @author Artem Tikhomirov
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44 * @author TMate Software Ltd.
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45 */
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46 public class HgStatusCollector {
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48 private final HgRepository repo;
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49 private final SortedMap<Integer, ManifestRevisionInspector> cache; // sparse array, in fact
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50 // with cpython repository, ~70 000 changes, complete Log (direct out, no reverse) output
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51 // no cache limit, no nodeids and fname caching - OOME on changeset 1035
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52 // no cache limit, but with cached nodeids and filenames - 1730+
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53 // cache limit 100 - 19+ minutes to process 10000, and still working (too long, stopped)
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54 private final int cacheMaxSize = 50; // do not keep too much manifest revisions
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55 private PathPool pathPool;
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56 private final Pool<Nodeid> cacheNodes;
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57 private final Pool<String> cacheFilenames; // XXX in fact, need to think if use of PathPool directly instead is better solution
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58 private final ManifestRevisionInspector emptyFakeState;
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59 private Path.Matcher scope = new Path.Matcher.Any();
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62 public HgStatusCollector(HgRepository hgRepo) {
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63 this.repo = hgRepo;
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64 cache = new TreeMap<Integer, ManifestRevisionInspector>();
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65 cacheNodes = new Pool<Nodeid>();
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66 cacheFilenames = new Pool<String>();
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68 emptyFakeState = new ManifestRevisionInspector(null, null);
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69 emptyFakeState.begin(-1, null, -1);
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70 emptyFakeState.end(-1);
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71 }
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72
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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 ManifestRevisionInspector get(int rev) {
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78 ManifestRevisionInspector 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 while (cache.size() > cacheMaxSize) {
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84 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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85 cache.remove(cache.firstKey());
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86 }
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87 i = new ManifestRevisionInspector(cacheNodes, cacheFilenames);
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88 cache.put(rev, i);
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89 repo.getManifest().walk(rev, rev, i);
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90 }
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91 return i;
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92 }
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94 private boolean cached(int revision) {
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95 return cache.containsKey(revision) || revision == -1;
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96 }
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98 private void initCacheRange(int minRev, int maxRev) {
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99 while (cache.size() > cacheMaxSize) {
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100 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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101 cache.remove(cache.firstKey());
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102 }
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103 repo.getManifest().walk(minRev, maxRev, new HgManifest.Inspector() {
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104 private ManifestRevisionInspector delegate;
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105 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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106
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107 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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108 assert delegate == null;
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109 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never -1 here
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110 cacheHit = true;
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111 } else {
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112 cache.put(changelogRevision, delegate = new ManifestRevisionInspector(cacheNodes, cacheFilenames));
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113 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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114 // otherwise remove entries we just added
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115 delegate.begin(manifestRevision, nid, changelogRevision);
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116 cacheHit = false;
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117 }
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118 return true;
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119 }
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120
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121 public boolean next(Nodeid nid, String fname, String flags) {
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122 if (!cacheHit) {
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123 delegate.next(nid, fname, flags);
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124 }
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125 return true;
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126 }
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127
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128 public boolean end(int revision) {
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129 if (!cacheHit) {
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130 delegate.end(revision);
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131 }
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132 cacheHit = false;
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133 delegate = null;
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134 return true;
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135 }
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136 });
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137 }
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138
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139 /*package-local*/ ManifestRevisionInspector raw(int rev) {
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140 return get(rev);
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141 }
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142 /*package-local*/ PathPool getPathPool() {
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143 if (pathPool == null) {
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144 pathPool = new PathPool(new PathRewrite.Empty());
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145 }
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146 return pathPool;
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147 }
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148
142
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149 /**
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150 * Allows sharing of a common path cache
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151 */
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152 public void setPathPool(PathPool pathPool) {
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153 this.pathPool = pathPool;
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154 }
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155
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156 /**
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157 * Limit activity of the collector to certain sub-tree of the repository.
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158 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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159 */
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160 public void setScope(Path.Matcher scopeMatcher) {
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161 // do not assign null, ever
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162 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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163 }
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164
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165 // hg status --change <rev>
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166 public void change(int rev, HgStatusInspector inspector) {
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167 int[] parents = new int[2];
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168 repo.getChangelog().parents(rev, parents, null, null);
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169 walk(parents[0], rev, inspector);
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170 }
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171
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172 // I assume revision numbers are the same for changelog and manifest - here
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173 // user would like to pass changelog revision numbers, and I use them directly to walk manifest.
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174 // if this assumption is wrong, fix this (lookup manifest revisions from changeset).
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175 // rev1 and rev2 may be -1 to indicate comparison to empty repository
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176 // argument order matters
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177 public void walk(int rev1, int rev2, HgStatusInspector inspector) {
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178 if (rev1 == rev2) {
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179 throw new IllegalArgumentException();
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180 }
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181 if (inspector == null) {
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182 throw new IllegalArgumentException();
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183 }
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184 if (inspector instanceof Record) {
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185 ((Record) inspector).init(rev1, rev2, this);
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186 }
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187 final int lastManifestRevision = repo.getChangelog().getLastRevision();
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188 if (rev1 == TIP) {
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189 rev1 = lastManifestRevision;
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190 }
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191 if (rev2 == TIP) {
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192 rev2 = lastManifestRevision;
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193 }
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194 // in fact, rev1 and rev2 are often next (or close) to each other,
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195 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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196 ManifestRevisionInspector r1, r2 ;
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197 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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198 if (need1 || need2) {
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199 int minRev, maxRev;
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200 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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201 minRev = rev1 < rev2 ? rev1 : rev2;
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202 maxRev = minRev == rev1 ? rev2 : rev1;
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203 if (minRev > 0) {
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204 minRev--; // expand range a bit
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205 }
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206 initCacheRange(minRev, maxRev);
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207 need1 = need2 = false;
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208 }
197
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209 // either both unknown and far from each other, or just one of them.
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210 // read with neighbors to save potential subsequent calls for neighboring elements
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211 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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212 // which going to be read anyway
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213 if (need1) {
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214 minRev = rev1;
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215 maxRev = rev1 < lastManifestRevision-5 ? rev1+5 : lastManifestRevision;
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216 initCacheRange(minRev, maxRev);
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217 }
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218 if (need2) {
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219 minRev = rev2;
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220 maxRev = rev2 < lastManifestRevision-5 ? rev2+5 : lastManifestRevision;
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221 initCacheRange(minRev, maxRev);
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222 }
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223 }
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224 r1 = get(rev1);
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225 r2 = get(rev2);
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226
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227 PathPool pp = getPathPool();
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228 TreeSet<String> r1Files = new TreeSet<String>(r1.files());
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229 for (String fname : r2.files()) {
226
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230 final Path r2filePath = pp.path(fname);
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231 if (!scope.accept(r2filePath)) {
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232 continue;
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233 }
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234 if (r1Files.remove(fname)) {
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235 Nodeid nidR1 = r1.nodeid(fname);
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236 Nodeid nidR2 = r2.nodeid(fname);
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237 String flagsR1 = r1.flags(fname);
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238 String flagsR2 = r2.flags(fname);
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239 if (nidR1.equals(nidR2) && ((flagsR2 == null && flagsR1 == null) || (flagsR2 != null && flagsR2.equals(flagsR1)))) {
226
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240 inspector.clean(r2filePath);
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241 } else {
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242 inspector.modified(r2filePath);
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243 }
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244 } else {
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245 try {
226
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246 Path copyTarget = r2filePath;
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247 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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248 if (copyOrigin != null) {
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249 inspector.copied(pp.path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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250 } else {
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251 inspector.added(copyTarget);
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252 }
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253 } catch (HgDataStreamException ex) {
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254 ex.printStackTrace();
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255 // FIXME perhaps, shall record this exception to dedicated mediator and continue
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256 // for a single file not to be irresolvable obstacle for a status operation
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257 }
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258 }
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259 }
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260 for (String left : r1Files) {
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261 final Path r2filePath = pp.path(left);
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262 if (scope.accept(r2filePath)) {
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263 inspector.removed(r2filePath);
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264 }
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265 }
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266 }
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267
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268 public Record status(int rev1, int rev2) {
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269 Record rv = new Record();
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270 walk(rev1, rev2, rv);
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271 return rv;
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272 }
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273
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274 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<String> originals, int originalChangelogRevision) throws HgDataStreamException {
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275 HgDataFile df = hgRepo.getFileNode(fname);
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276 while (df.isCopy()) {
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277 Path original = df.getCopySourceName();
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278 if (originals.contains(original.toString())) {
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279 df = hgRepo.getFileNode(original);
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280 int changelogRevision = df.getChangesetLocalRevision(0);
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281 if (changelogRevision <= originalChangelogRevision) {
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282 // copy/rename source was known prior to rev1
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283 // (both r1Files.contains is true and original was created earlier than rev1)
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284 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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285 // might get removed somewhere in between (changelogRevision < R < rev1)
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286 return original;
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287 }
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288 break; // copy/rename done later
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289 }
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290 df = hgRepo.getFileNode(original); // try more steps away
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291 }
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292 return null;
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293 }
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294
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295 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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296 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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297 public static class Record implements HgStatusInspector {
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298 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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299 private Map<Path, Path> copied;
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300
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301 private int startRev, endRev;
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302 private HgStatusCollector statusHelper;
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303
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304 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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305 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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306 // implicit reference to StatusCollector) may be better?
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307 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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308 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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309 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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310 // how to supply [start..end] values there easily
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311 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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312 startRev = startRevision;
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313 endRev = endRevision;
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314 statusHelper = self;
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315 }
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316
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317 public Nodeid nodeidBeforeChange(Path fname) {
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318 if (statusHelper == null || startRev == BAD_REVISION) {
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319 return null;
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320 }
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diff changeset
321 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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diff changeset
322 return null;
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323 }
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324 return statusHelper.raw(startRev).nodeid(fname.toString());
64
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diff changeset
325 }
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diff changeset
326 public Nodeid nodeidAfterChange(Path fname) {
68
0e499fed9b3d StatusCommand with tests. Extra constants to indicate common revision cases
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diff changeset
327 if (statusHelper == null || endRev == BAD_REVISION) {
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diff changeset
328 return null;
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diff changeset
329 }
64
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diff changeset
330 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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diff changeset
331 return null;
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diff changeset
332 }
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333 return statusHelper.raw(endRev).nodeid(fname.toString());
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diff changeset
334 }
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335
93
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336 public List<Path> getModified() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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337 return proper(modified);
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338 }
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339
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340 public List<Path> getAdded() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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341 return proper(added);
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342 }
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343
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344 public List<Path> getRemoved() {
55
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345 return proper(removed);
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346 }
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347
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diff changeset
348 public Map<Path,Path> getCopied() {
55
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349 if (copied == null) {
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350 return Collections.emptyMap();
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351 }
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352 return Collections.unmodifiableMap(copied);
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353 }
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354
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355 public List<Path> getClean() {
55
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356 return proper(clean);
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357 }
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358
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diff changeset
359 public List<Path> getMissing() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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360 return proper(missing);
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361 }
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diff changeset
362
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363 public List<Path> getUnknown() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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364 return proper(unknown);
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diff changeset
365 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
366
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diff changeset
367 public List<Path> getIgnored() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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368 return proper(ignored);
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diff changeset
369 }
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diff changeset
370
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diff changeset
371 private List<Path> proper(List<Path> l) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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372 if (l == null) {
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diff changeset
373 return Collections.emptyList();
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diff changeset
374 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
375 return Collections.unmodifiableList(l);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
376 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
377
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diff changeset
378 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
379 //
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
380
93
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diff changeset
381 public void modified(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
382 modified = doAdd(modified, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
383 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
384
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diff changeset
385 public void added(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
386 added = doAdd(added, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
387 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
388
93
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diff changeset
389 public void copied(Path fnameOrigin, Path fnameAdded) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
390 if (copied == null) {
93
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diff changeset
391 copied = new LinkedHashMap<Path, Path>();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
392 }
74
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
393 added(fnameAdded);
6f1b88693d48 Complete refactoring to org.tmatesoft
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diff changeset
394 copied.put(fnameAdded, fnameOrigin);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
395 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
396
93
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diff changeset
397 public void removed(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
398 removed = doAdd(removed, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
399 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
400
93
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diff changeset
401 public void clean(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
402 clean = doAdd(clean, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
403 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
404
93
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diff changeset
405 public void missing(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
406 missing = doAdd(missing, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
407 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
408
93
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diff changeset
409 public void unknown(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
410 unknown = doAdd(unknown, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
411 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
412
93
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diff changeset
413 public void ignored(Path fname) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
414 ignored = doAdd(ignored, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
415 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
416
93
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diff changeset
417 private static List<Path> doAdd(List<Path> l, Path p) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
418 if (l == null) {
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
419 l = new LinkedList<Path>();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
420 }
93
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diff changeset
421 l.add(p);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
422 return l;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
423 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
424 }
195
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
425
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
426 /*package-local*/ static final class ManifestRevisionInspector implements HgManifest.Inspector {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
427 private final TreeMap<String, Nodeid> idsMap;
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
428 private final TreeMap<String, String> flagsMap;
195
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
429 private final Pool<Nodeid> idsPool;
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
430 private final Pool<String> namesPool;
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
431
195
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
432 // optional pools for effective management of nodeids and filenames (they are likely
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
433 // to be duplicated among different manifest revisions
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
434 public ManifestRevisionInspector(Pool<Nodeid> nodeidPool, Pool<String> filenamePool) {
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
435 idsPool = nodeidPool;
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
436 namesPool = filenamePool;
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
437 idsMap = new TreeMap<String, Nodeid>();
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
438 flagsMap = new TreeMap<String, String>();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
439 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
440
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
441 public Collection<String> files() {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
442 return idsMap.keySet();
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
443 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
444
89
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
445 public Nodeid nodeid(String fname) {
42bcb4bffd17 Refactored to simplify manifest collector
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diff changeset
446 return idsMap.get(fname);
55
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
447 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
448
89
42bcb4bffd17 Refactored to simplify manifest collector
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449 public String flags(String fname) {
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450 return flagsMap.get(fname);
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451 }
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452
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453 //
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454
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455 public boolean next(Nodeid nid, String fname, String flags) {
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456 if (namesPool != null) {
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457 fname = namesPool.unify(fname);
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458 }
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459 if (idsPool != null) {
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460 nid = idsPool.unify(nid);
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461 }
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462 idsMap.put(fname, nid);
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463 if (flags != null) {
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464 // TreeMap$Entry takes 32 bytes. No reason to keep null for such price
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465 // Perhaps, Map<String, Pair<Nodeid, String>> might be better solution
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466 flagsMap.put(fname, flags);
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467 }
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468 return true;
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469 }
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470
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471 public boolean end(int revision) {
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472 // in fact, this class cares about single revision
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473 return false;
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474 }
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475
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476 public boolean begin(int revision, Nodeid nid, int changelogRevision) {
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477 return true;
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478 }
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479 }
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480
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481 }