Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 420:6c22bdc0bdfd

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Mar 2012 22:56:01 +0100
parents 866fc3b597a0
children 9c9c442b5f2e
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.*;
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20
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21 import java.util.Collection;
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22 import java.util.Collections;
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23 import java.util.LinkedHashMap;
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24 import java.util.LinkedList;
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25 import java.util.List;
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26 import java.util.Map;
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27 import java.util.TreeSet;
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29 import org.tmatesoft.hg.core.HgBadStateException;
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30 import org.tmatesoft.hg.core.HgException;
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31 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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32 import org.tmatesoft.hg.core.HgInvalidRevisionException;
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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 == NO_REVISION) {
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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 == NO_REVISION;
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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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101
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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 NO_REVISION 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(NO_REVISION, null, NO_REVISION);
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157 fakeEmptyRev.end(NO_REVISION);
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158 return fakeEmptyRev;
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159 }
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160
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161 /**
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162 * Access specific manifest revision
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163 * @param rev
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164 * @return
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165 * @throws HgInvalidControlFileException
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166 */
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167 /*package-local*/ ManifestRevision raw(int rev) throws HgInvalidControlFileException {
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168 return get(rev);
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169 }
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170 /*package-local*/ PathPool getPathPool() {
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171 if (pathPool == null) {
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172 pathPool = new PathPool(new PathRewrite.Empty());
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173 }
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174 return pathPool;
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175 }
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176
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177 /**
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178 * Allows sharing of a common path cache
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179 */
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180 public void setPathPool(PathPool pathPool) {
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181 this.pathPool = pathPool;
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182 }
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183
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184 /**
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185 * Limit activity of the collector to certain sub-tree of the repository.
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186 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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187 */
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188 public void setScope(Path.Matcher scopeMatcher) {
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189 // do not assign null, ever
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190 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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191 }
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192
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193 /**
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194 * 'hg status --change REV' command counterpart.
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195 *
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196 * @throws HgInvalidRevisionException if argument specifies non-existent revision index
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197 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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198 */
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199 public void change(int revisionIndex, HgStatusInspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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200 int p;
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201 if (revisionIndex == 0) {
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202 p = NO_REVISION;
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203 } else {
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204 int[] parents = new int[2];
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205 repo.getChangelog().parents(revisionIndex, parents, null, null);
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206 // #parents call above is responsible for NO_REVISION
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207 p = parents[0]; // hg --change alsways uses first parent, despite the fact there might be valid (-1, 18) pair of parents
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208 }
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209 walk(p, revisionIndex, inspector);
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210 }
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211
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212 /**
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213 * Parameters <b>rev1</b> and <b>rev2</b> are changelog revision indexes, shall not be the same. Argument order matters.
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214 * Either rev1 or rev2 may be {@link HgRepository#NO_REVISION} to indicate comparison to empty repository
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215 *
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216 * FIXME cancellation (at least exception)?
403
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217 *
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218 * @param rev1 <em>from</em> changeset index, non-negative or {@link HgRepository#TIP}
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219 * @param rev2 <em>to</em> changeset index, non-negative or {@link HgRepository#TIP}
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220 * @param inspector callback for status information
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221 * @throws HgInvalidRevisionException if any argument specifies non-existent revision index
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222 * @throws IllegalArgumentException inspector other incorrect argument values
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223 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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224 */
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225 public void walk(int rev1, int rev2, HgStatusInspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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226 if (rev1 == rev2) {
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227 throw new IllegalArgumentException();
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228 }
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229 if (inspector == null) {
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230 throw new IllegalArgumentException();
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231 }
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232 final int lastChangelogRevision = repo.getChangelog().getLastRevision();
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233 if (rev1 == TIP) {
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234 rev1 = lastChangelogRevision;
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235 }
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236 if (rev2 == TIP) {
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237 rev2 = lastChangelogRevision;
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238 }
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239 if (rev1 != NO_REVISION && (HgInternals.wrongRevisionIndex(rev1) || rev1 == WORKING_COPY || rev1 == BAD_REVISION || rev1 > lastChangelogRevision)) {
403
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240 throw new HgInvalidRevisionException(rev1);
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241 }
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242 if (rev2 != NO_REVISION && (HgInternals.wrongRevisionIndex(rev2) || rev2 == WORKING_COPY || rev2 == BAD_REVISION || rev2 > lastChangelogRevision)) {
403
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243 throw new HgInvalidRevisionException(rev2);
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244 }
282
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245 if (inspector instanceof Record) {
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246 ((Record) inspector).init(rev1, rev2, this);
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247 }
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248 // in fact, rev1 and rev2 are often next (or close) to each other,
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249 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
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250 ManifestRevision r1, r2 ;
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251 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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252 if (need1 || need2) {
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253 int minRev, maxRev;
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254 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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255 minRev = rev1 < rev2 ? rev1 : rev2;
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256 maxRev = minRev == rev1 ? rev2 : rev1;
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257 if (minRev > 0) {
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258 minRev--; // expand range a bit
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259 }
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260 initCacheRange(minRev, maxRev);
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261 need1 = need2 = false;
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262 }
197
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263 // either both unknown and far from each other, or just one of them.
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264 // read with neighbors to save potential subsequent calls for neighboring elements
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265 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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266 // which going to be read anyway
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267 if (need1) {
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268 minRev = rev1;
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269 maxRev = rev1 < lastChangelogRevision-5 ? rev1+5 : lastChangelogRevision;
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270 initCacheRange(minRev, maxRev);
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271 }
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272 if (need2) {
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273 minRev = rev2;
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274 maxRev = rev2 < lastChangelogRevision-5 ? rev2+5 : lastChangelogRevision;
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275 initCacheRange(minRev, maxRev);
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276 }
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277 }
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278 r1 = get(rev1);
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279 r2 = get(rev2);
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280
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281 TreeSet<Path> r1Files = new TreeSet<Path>(r1.files());
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282 for (Path r2fname : r2.files()) {
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283 if (!scope.accept(r2fname)) {
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284 continue;
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285 }
285
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286 if (r1Files.remove(r2fname)) {
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287 Nodeid nidR1 = r1.nodeid(r2fname);
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288 Nodeid nidR2 = r2.nodeid(r2fname);
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289 HgManifest.Flags flagsR1 = r1.flags(r2fname);
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290 HgManifest.Flags flagsR2 = r2.flags(r2fname);
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291 if (nidR1.equals(nidR2) && flagsR2 == flagsR1) {
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292 inspector.clean(r2fname);
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293 } else {
285
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294 inspector.modified(r2fname);
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295 }
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296 } else {
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297 try {
285
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298 Path copyTarget = r2fname;
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299 Path copyOrigin = getOriginIfCopy(repo, copyTarget, r1Files, rev1);
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300 if (copyOrigin != null) {
285
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301 inspector.copied(getPathPool().path(copyOrigin) /*pipe through pool, just in case*/, copyTarget);
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302 } else {
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303 inspector.added(copyTarget);
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304 }
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305 } catch (HgException ex) {
360
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306 // record exception to a mediator and continue,
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307 // for a single file not to be irresolvable obstacle for a status operation
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308 inspector.invalid(r2fname, ex);
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309 }
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310 }
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311 }
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312 for (Path r1fname : r1Files) {
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313 if (scope.accept(r1fname)) {
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314 inspector.removed(r1fname);
226
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315 }
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316 }
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317 }
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318
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319 /**
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320 * Collects status between two revisions, changes from <b>rev1</b> up to <b>rev2</b>.
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321 *
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322 * @param rev1 <em>from</em> changeset index
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323 * @param rev2 <em>to</em> changeset index
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324 * @return information object that describes change between the revisions
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325 * @throws HgInvalidRevisionException if any argument specifies non-existent revision index
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326 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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diff changeset
327 */
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diff changeset
328 public Record status(int rev1, int rev2) throws HgInvalidRevisionException, HgInvalidControlFileException {
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329 Record rv = new Record();
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330 walk(rev1, rev2, rv);
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331 return rv;
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332 }
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333
396
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334 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<Path> originals, int originalChangelogRevision) throws HgException {
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335 HgDataFile df = hgRepo.getFileNode(fname);
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336 if (!df.exists()) {
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337 String msg = String.format("Didn't find file '%s' in the repo. Perhaps, bad storage name conversion?", fname);
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338 throw new HgException(msg).setFileName(fname).setRevisionIndex(originalChangelogRevision);
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339 }
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340 while (df.isCopy()) {
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341 Path original = df.getCopySourceName();
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342 if (originals.contains(original)) {
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343 df = hgRepo.getFileNode(original);
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344 int changelogRevision = df.getChangesetRevisionIndex(0);
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345 if (changelogRevision <= originalChangelogRevision) {
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346 // copy/rename source was known prior to rev1
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347 // (both r1Files.contains is true and original was created earlier than rev1)
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348 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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349 // might get removed somewhere in between (changelogRevision < R < rev1)
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350 return original;
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351 }
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352 break; // copy/rename done later
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353 }
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354 df = hgRepo.getFileNode(original); // try more steps away
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355 }
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356 return null;
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357 }
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358
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359 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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360 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
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361 /**
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362 * Straightforward {@link HgStatusInspector} implementation that collects all status values.
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363 *
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364 * <p>Naturally, {@link Record Records} originating from {@link HgStatusCollector} would report only <em>modified, added,
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365 * removed</em> and <em>clean</em> values, other are available only when using {@link Record} with {@link HgWorkingCopyStatusCollector}.
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366 *
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367 * <p>Note, this implementation records copied files as added, thus key values in {@link #getCopied()} map are subset of paths
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368 * from {@link #getAdded()}.
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369 */
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370 public static class Record implements HgStatusInspector {
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371 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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372 private Map<Path, Path> copied;
360
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373 private Map<Path, Exception> failures;
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374
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375 private int startRev, endRev;
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376 private HgStatusCollector statusHelper;
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377
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378 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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379 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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380 // implicit reference to StatusCollector) may be better?
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381 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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382 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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383 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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384 // how to supply [start..end] values there easily
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385 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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386 startRev = startRevision;
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387 endRev = endRevision;
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388 statusHelper = self;
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389 }
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390
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391 public Nodeid nodeidBeforeChange(Path fname) throws HgInvalidControlFileException {
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392 if (statusHelper == null || startRev == BAD_REVISION) {
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393 return null;
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394 }
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395 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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396 return null;
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397 }
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398 return statusHelper.raw(startRev).nodeid(fname);
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399 }
366
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diff changeset
400 public Nodeid nodeidAfterChange(Path fname) throws HgInvalidControlFileException {
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401 if (statusHelper == null || endRev == BAD_REVISION) {
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402 return null;
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403 }
64
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404 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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405 return null;
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406 }
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407 return statusHelper.raw(endRev).nodeid(fname);
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408 }
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diff changeset
409
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410 public List<Path> getModified() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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411 return proper(modified);
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412 }
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413
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414 public List<Path> getAdded() {
55
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415 return proper(added);
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416 }
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417
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418 public List<Path> getRemoved() {
55
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419 return proper(removed);
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420 }
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421
316
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422 /**
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423 * Map files from {@link #getAdded()} to their original filenames, if were copied/moved.
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424 */
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425 public Map<Path,Path> getCopied() {
55
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diff changeset
426 if (copied == null) {
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diff changeset
427 return Collections.emptyMap();
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diff changeset
428 }
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429 return Collections.unmodifiableMap(copied);
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430 }
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diff changeset
431
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432 public List<Path> getClean() {
55
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433 return proper(clean);
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434 }
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435
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436 public List<Path> getMissing() {
55
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437 return proper(missing);
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diff changeset
438 }
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439
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440 public List<Path> getUnknown() {
55
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441 return proper(unknown);
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442 }
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443
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444 public List<Path> getIgnored() {
55
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445 return proper(ignored);
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diff changeset
446 }
360
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diff changeset
447
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diff changeset
448 public Map<Path, Exception> getInvalid() {
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diff changeset
449 if (failures == null) {
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diff changeset
450 return Collections.emptyMap();
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451 }
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452 return Collections.unmodifiableMap(failures);
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453 }
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454
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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455 private static List<Path> proper(List<Path> l) {
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456 if (l == null) {
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457 return Collections.emptyList();
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458 }
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459 return Collections.unmodifiableList(l);
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460 }
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461
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462 //
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463 //
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464
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465 public void modified(Path fname) {
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466 modified = doAdd(modified, fname);
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467 }
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468
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469 public void added(Path fname) {
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470 added = doAdd(added, fname);
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471 }
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472
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473 public void copied(Path fnameOrigin, Path fnameAdded) {
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474 if (copied == null) {
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475 copied = new LinkedHashMap<Path, Path>();
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476 }
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6f1b88693d48 Complete refactoring to org.tmatesoft
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477 added(fnameAdded);
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478 copied.put(fnameAdded, fnameOrigin);
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479 }
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480
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481 public void removed(Path fname) {
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482 removed = doAdd(removed, fname);
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483 }
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484
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485 public void clean(Path fname) {
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486 clean = doAdd(clean, fname);
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487 }
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488
93
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489 public void missing(Path fname) {
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490 missing = doAdd(missing, fname);
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491 }
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492
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493 public void unknown(Path fname) {
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494 unknown = doAdd(unknown, fname);
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495 }
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496
93
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497 public void ignored(Path fname) {
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498 ignored = doAdd(ignored, fname);
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499 }
360
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500
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501 public void invalid(Path fname, Exception ex) {
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502 if (failures == null) {
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503 failures = new LinkedHashMap<Path, Exception>();
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504 }
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505 failures.put(fname, ex);
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506 }
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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507
93
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508 private static List<Path> doAdd(List<Path> l, Path p) {
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509 if (l == null) {
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510 l = new LinkedList<Path>();
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511 }
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512 l.add(p);
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513 return l;
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514 }
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515 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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516
05829a70b30b Status operation extracted into separate, cache-friendly class
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517 }