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annotate src/org/tmatesoft/hg/repo/HgStatusCollector.java @ 423:9c9c442b5f2e

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Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 23 Mar 2012 22:51:18 +0100
parents 866fc3b597a0
children 6437d261048a
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.HgException;
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30 import org.tmatesoft.hg.core.Nodeid;
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31 import org.tmatesoft.hg.internal.IntMap;
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32 import org.tmatesoft.hg.internal.ManifestRevision;
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33 import org.tmatesoft.hg.internal.Pool;
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34 import org.tmatesoft.hg.util.CancelSupport;
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35 import org.tmatesoft.hg.util.CancelledException;
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36 import org.tmatesoft.hg.util.Path;
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37 import org.tmatesoft.hg.util.PathPool;
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38 import org.tmatesoft.hg.util.PathRewrite;
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41 /**
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42 * Collect status information for changes between two repository revisions.
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43 *
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44 * @author Artem Tikhomirov
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45 * @author TMate Software Ltd.
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46 */
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47 public class HgStatusCollector {
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49 private final HgRepository repo;
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50 private final IntMap<ManifestRevision> cache; // sparse array, in fact
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51 // with cpython repository, ~70 000 changes, complete Log (direct out, no reverse) output
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52 // no cache limit, no nodeids and fname caching - OOME on changeset 1035
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53 // no cache limit, but with cached nodeids and filenames - 1730+
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54 // cache limit 100 - 19+ minutes to process 10000, and still working (too long, stopped)
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55 private final int cacheMaxSize = 50; // do not keep too much manifest revisions
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56 private PathPool pathPool;
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57 private final Pool<Nodeid> cacheNodes;
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58 private final Pool<Path> cacheFilenames;
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59 private final ManifestRevision emptyFakeState;
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60 private Path.Matcher scope = new Path.Matcher.Any();
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63 public HgStatusCollector(HgRepository hgRepo) {
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64 this.repo = hgRepo;
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65 cache = new IntMap<ManifestRevision>(cacheMaxSize);
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66 cacheNodes = new Pool<Nodeid>();
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67 cacheFilenames = new Pool<Path>();
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69 emptyFakeState = createEmptyManifestRevision();
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70 }
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72 public HgRepository getRepo() {
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73 return repo;
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74 }
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76 private ManifestRevision get(int rev) throws HgInvalidControlFileException {
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77 ManifestRevision i = cache.get(rev);
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78 if (i == null) {
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79 if (rev == NO_REVISION) {
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80 return emptyFakeState;
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81 }
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82 ensureCacheSize();
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83 i = new ManifestRevision(cacheNodes, cacheFilenames);
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84 cache.put(rev, i);
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85 repo.getManifest().walk(rev, rev, i);
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86 }
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87 return i;
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88 }
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90 private boolean cached(int revision) {
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91 return cache.containsKey(revision) || revision == NO_REVISION;
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92 }
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94 private void ensureCacheSize() {
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95 if (cache.size() > cacheMaxSize) {
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96 // assume usually we go from oldest to newest, hence remove oldest as most likely to be no longer necessary
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97 cache.removeFromStart(cache.size() - cacheMaxSize + 1 /* room for new element */);
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98 }
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99 }
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101 private void initCacheRange(int minRev, int maxRev) throws HgInvalidControlFileException {
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102 ensureCacheSize();
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103 // In fact, walk(minRev, maxRev) doesn't imply
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104 // there would be maxRev-minRev+1 revisions visited. For example,
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105 // check cpython repo with 'hg log -r 22418:22420 --debug' and admire
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106 // manifest revisions 66650, 21683, 21684. Thus, innocent walk(22418,22420) results in 40k+ revisions and OOME
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107 // Instead, be explicit of what revisions are of interest
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108 assert minRev <= maxRev;
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109 int[] revisionsToCollect = new int[maxRev - minRev + 1];
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110 for (int x = minRev, i = 0; x <= maxRev; i++, x++) {
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111 revisionsToCollect[i] = x;
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112 }
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113 repo.getManifest().walk(new HgManifest.Inspector2() {
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114 private ManifestRevision delegate;
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115 private boolean cacheHit; // range may include revisions we already know about, do not re-create them
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116
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117 public boolean begin(int manifestRevision, Nodeid nid, int changelogRevision) {
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118 assert delegate == null;
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119 if (cache.containsKey(changelogRevision)) { // don't need to check emptyFakeState hit as revision never NO_REVISION here
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120 cacheHit = true;
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121 } else {
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122 cache.put(changelogRevision, delegate = new ManifestRevision(cacheNodes, cacheFilenames));
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123 // cache may grow bigger than max size here, but it's ok as present simplistic cache clearing mechanism may
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124 // otherwise remove entries we just added
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125 delegate.begin(manifestRevision, nid, changelogRevision);
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126 cacheHit = false;
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127 }
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128 return true;
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129 }
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130
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131 public boolean next(Nodeid nid, String fname, String flags) {
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132 throw new IllegalStateException(HgManifest.Inspector2.class.getName());
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133 }
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134
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135 public boolean next(Nodeid nid, Path fname, HgManifest.Flags flags) {
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136 if (!cacheHit) {
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137 delegate.next(nid, fname, flags);
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138 }
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139 return true;
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140 }
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141
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142 public boolean end(int revision) {
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143 if (!cacheHit) {
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144 delegate.end(revision);
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145 }
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146 cacheHit = false;
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147 delegate = null;
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148 return true;
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149 }
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150 }, revisionsToCollect);
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151 }
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152
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153 /*package-local*/ static ManifestRevision createEmptyManifestRevision() {
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154 ManifestRevision fakeEmptyRev = new ManifestRevision(null, null);
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155 fakeEmptyRev.begin(NO_REVISION, null, NO_REVISION);
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156 fakeEmptyRev.end(NO_REVISION);
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157 return fakeEmptyRev;
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158 }
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159
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160 /**
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161 * Access specific manifest revision
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162 * @param rev
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163 * @return
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164 * @throws HgInvalidControlFileException
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165 */
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166 /*package-local*/ ManifestRevision raw(int rev) throws HgInvalidControlFileException {
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167 return get(rev);
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168 }
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169 /*package-local*/ PathPool getPathPool() {
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170 if (pathPool == null) {
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171 pathPool = new PathPool(new PathRewrite.Empty());
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172 }
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173 return pathPool;
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174 }
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175
142
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176 /**
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177 * Allows sharing of a common path cache
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178 */
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179 public void setPathPool(PathPool pathPool) {
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180 this.pathPool = pathPool;
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181 }
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182
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183 /**
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184 * Limit activity of the collector to certain sub-tree of the repository.
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185 * @param scopeMatcher tells whether collector shall report specific path, can be <code>null</code>
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186 */
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187 public void setScope(Path.Matcher scopeMatcher) {
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188 // do not assign null, ever
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189 scope = scopeMatcher == null ? new Path.Matcher.Any() : scopeMatcher;
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190 }
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191
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192 /**
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193 * 'hg status --change REV' command counterpart.
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194 *
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195 * @throws CancelledException if operation execution was cancelled
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196 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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197 */
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198 public void change(int revisionIndex, HgStatusInspector inspector) throws CancelledException, HgRuntimeException {
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199 int p;
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200 if (revisionIndex == 0) {
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201 p = NO_REVISION;
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202 } else {
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203 int[] parents = new int[2];
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204 repo.getChangelog().parents(revisionIndex, parents, null, null);
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205 // #parents call above is responsible for NO_REVISION
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206 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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207 }
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208 walk(p, revisionIndex, inspector);
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209 }
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210
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211 /**
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212 * Parameters <b>rev1</b> and <b>rev2</b> are changelog revision indexes, shall not be the same. Argument order matters.
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213 * Either rev1 or rev2 may be {@link HgRepository#NO_REVISION} to indicate comparison to empty repository
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214 *
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215 * @param rev1 <em>from</em> changeset index, non-negative or {@link HgRepository#TIP}
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216 * @param rev2 <em>to</em> changeset index, non-negative or {@link HgRepository#TIP}
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217 * @param inspector callback for status information
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218 * @throws CancelledException if operation execution was cancelled
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219 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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220 * @throws IllegalArgumentException inspector other incorrect argument values
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221 */
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222 public void walk(int rev1, int rev2, HgStatusInspector inspector) throws CancelledException, HgRuntimeException, IllegalArgumentException {
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223 if (rev1 == rev2) {
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224 throw new IllegalArgumentException();
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225 }
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226 if (inspector == null) {
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227 throw new IllegalArgumentException();
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228 }
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229 final int lastChangelogRevision = repo.getChangelog().getLastRevision();
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230 if (rev1 == TIP) {
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231 rev1 = lastChangelogRevision;
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232 }
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233 if (rev2 == TIP) {
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234 rev2 = lastChangelogRevision;
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235 }
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236 if (rev1 != NO_REVISION && (HgInternals.wrongRevisionIndex(rev1) || rev1 == WORKING_COPY || rev1 == BAD_REVISION || rev1 > lastChangelogRevision)) {
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237 throw new HgInvalidRevisionException(rev1);
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238 }
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239 if (rev2 != NO_REVISION && (HgInternals.wrongRevisionIndex(rev2) || rev2 == WORKING_COPY || rev2 == BAD_REVISION || rev2 > lastChangelogRevision)) {
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240 throw new HgInvalidRevisionException(rev2);
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241 }
282
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242 if (inspector instanceof Record) {
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243 ((Record) inspector).init(rev1, rev2, this);
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244 }
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245 // in fact, rev1 and rev2 are often next (or close) to each other,
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246 // thus, we can optimize Manifest reads here (manifest.walk(rev1, rev2))
248
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247 ManifestRevision r1, r2 ;
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248 boolean need1 = !cached(rev1), need2 = !cached(rev2);
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249 if (need1 || need2) {
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250 int minRev, maxRev;
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251 if (need1 && need2 && Math.abs(rev1 - rev2) < 5 /*subjective equivalent of 'close enough'*/) {
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252 minRev = rev1 < rev2 ? rev1 : rev2;
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253 maxRev = minRev == rev1 ? rev2 : rev1;
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254 if (minRev > 0) {
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255 minRev--; // expand range a bit
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256 }
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257 initCacheRange(minRev, maxRev);
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258 need1 = need2 = false;
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259 }
197
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260 // either both unknown and far from each other, or just one of them.
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261 // read with neighbors to save potential subsequent calls for neighboring elements
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262 // XXX perhaps, if revlog.baseRevision is cheap, shall expand minRev up to baseRevision
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263 // which going to be read anyway
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264 if (need1) {
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265 minRev = rev1;
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266 maxRev = rev1 < lastChangelogRevision-5 ? rev1+5 : lastChangelogRevision;
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267 initCacheRange(minRev, maxRev);
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268 }
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269 if (need2) {
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270 minRev = rev2;
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271 maxRev = rev2 < lastChangelogRevision-5 ? rev2+5 : lastChangelogRevision;
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272 initCacheRange(minRev, maxRev);
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273 }
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274 }
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275 r1 = get(rev1);
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276 r2 = get(rev2);
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277
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278 final CancelSupport cs = CancelSupport.Factory.get(inspector);
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279
285
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280 TreeSet<Path> r1Files = new TreeSet<Path>(r1.files());
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281 for (Path r2fname : r2.files()) {
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282 if (!scope.accept(r2fname)) {
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283 continue;
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284 }
285
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285 if (r1Files.remove(r2fname)) {
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286 Nodeid nidR1 = r1.nodeid(r2fname);
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287 Nodeid nidR2 = r2.nodeid(r2fname);
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288 HgManifest.Flags flagsR1 = r1.flags(r2fname);
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289 HgManifest.Flags flagsR2 = r2.flags(r2fname);
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290 if (nidR1.equals(nidR2) && flagsR2 == flagsR1) {
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291 inspector.clean(r2fname);
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292 } else {
285
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293 inspector.modified(r2fname);
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294 }
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295 cs.checkCancelled();
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296 } else {
157
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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 }
354
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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
360
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308 inspector.invalid(r2fname, ex);
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309 }
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310 cs.checkCancelled();
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311 }
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312 }
285
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313 for (Path r1fname : r1Files) {
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314 if (scope.accept(r1fname)) {
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315 inspector.removed(r1fname);
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316 cs.checkCancelled();
226
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317 }
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318 }
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319 }
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320
403
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321 /**
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322 * Collects status between two revisions, changes from <b>rev1</b> up to <b>rev2</b>.
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323 *
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324 * @param rev1 <em>from</em> changeset index
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325 * @param rev2 <em>to</em> changeset index
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326 * @return information object that describes change between the revisions
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327 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
403
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328 */
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329 public Record status(int rev1, int rev2) throws HgInvalidRevisionException, HgInvalidControlFileException {
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330 Record rv = new Record();
423
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331 try {
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332 walk(rev1, rev2, rv);
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333 } catch (CancelledException ex) {
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334 // can't happen as long our Record class doesn't implement CancelSupport
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335 HgInvalidStateException t = new HgInvalidStateException("Internal error");
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336 t.initCause(ex);
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337 throw t;
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338 }
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339 return rv;
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340 }
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341
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342 /*package-local*/static Path getOriginIfCopy(HgRepository hgRepo, Path fname, Collection<Path> originals, int originalChangelogRevision) throws HgException {
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343 HgDataFile df = hgRepo.getFileNode(fname);
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344 if (!df.exists()) {
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345 String msg = String.format("Didn't find file '%s' in the repo. Perhaps, bad storage name conversion?", fname);
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346 throw new HgException(msg).setFileName(fname).setRevisionIndex(originalChangelogRevision);
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347 }
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348 while (df.isCopy()) {
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349 Path original = df.getCopySourceName();
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350 if (originals.contains(original)) {
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351 df = hgRepo.getFileNode(original);
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352 int changelogRevision = df.getChangesetRevisionIndex(0);
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353 if (changelogRevision <= originalChangelogRevision) {
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354 // copy/rename source was known prior to rev1
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355 // (both r1Files.contains is true and original was created earlier than rev1)
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356 // without r1Files.contains changelogRevision <= rev1 won't suffice as the file
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357 // might get removed somewhere in between (changelogRevision < R < rev1)
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358 return original;
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359 }
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360 break; // copy/rename done later
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361 }
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362 df = hgRepo.getFileNode(original); // try more steps away
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363 }
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364 return null;
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365 }
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366
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367 // XXX for r1..r2 status, only modified, added, removed (and perhaps, clean) make sense
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368 // XXX Need to specify whether copy targets are in added or not (@see Inspector#copied above)
316
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369 /**
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370 * Straightforward {@link HgStatusInspector} implementation that collects all status values.
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371 *
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372 * <p>Naturally, {@link Record Records} originating from {@link HgStatusCollector} would report only <em>modified, added,
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373 * removed</em> and <em>clean</em> values, other are available only when using {@link Record} with {@link HgWorkingCopyStatusCollector}.
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374 *
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375 * <p>Note, this implementation records copied files as added, thus key values in {@link #getCopied()} map are subset of paths
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376 * from {@link #getAdded()}.
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377 */
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378 public static class Record implements HgStatusInspector {
423
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379 // NOTE, shall not implement CancelSupport, or methods that use it and don't expect this exception shall be changed
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380 private List<Path> modified, added, removed, clean, missing, unknown, ignored;
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381 private Map<Path, Path> copied;
360
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382 private Map<Path, Exception> failures;
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383
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384 private int startRev, endRev;
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385 private HgStatusCollector statusHelper;
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386
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387 // XXX StatusCollector may additionally initialize Record instance to speed lookup of changed file revisions
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388 // here I need access to ManifestRevisionInspector via #raw(). Perhaps, non-static class (to get
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389 // implicit reference to StatusCollector) may be better?
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390 // Since users may want to reuse Record instance we've once created (and initialized), we need to
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391 // ensure functionality is correct for each/any call (#walk checks instanceof Record and fixes it up)
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392 // Perhaps, distinct helper (sc.getRevisionHelper().nodeid(fname)) would be better, just not clear
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393 // how to supply [start..end] values there easily
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394 /*package-local*/void init(int startRevision, int endRevision, HgStatusCollector self) {
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395 startRev = startRevision;
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396 endRev = endRevision;
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397 statusHelper = self;
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398 }
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399
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400 public Nodeid nodeidBeforeChange(Path fname) throws HgInvalidControlFileException {
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401 if (statusHelper == null || startRev == BAD_REVISION) {
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402 return null;
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403 }
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404 if ((modified == null || !modified.contains(fname)) && (removed == null || !removed.contains(fname))) {
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405 return null;
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406 }
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407 return statusHelper.raw(startRev).nodeid(fname);
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408 }
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409 public Nodeid nodeidAfterChange(Path fname) throws HgInvalidControlFileException {
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410 if (statusHelper == null || endRev == BAD_REVISION) {
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411 return null;
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412 }
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413 if ((modified == null || !modified.contains(fname)) && (added == null || !added.contains(fname))) {
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414 return null;
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415 }
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416 return statusHelper.raw(endRev).nodeid(fname);
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417 }
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418
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419 public List<Path> getModified() {
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420 return proper(modified);
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421 }
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422
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423 public List<Path> getAdded() {
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424 return proper(added);
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425 }
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426
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427 public List<Path> getRemoved() {
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428 return proper(removed);
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429 }
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430
316
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431 /**
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432 * Map files from {@link #getAdded()} to their original filenames, if were copied/moved.
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433 */
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434 public Map<Path,Path> getCopied() {
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435 if (copied == null) {
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436 return Collections.emptyMap();
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437 }
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438 return Collections.unmodifiableMap(copied);
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439 }
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440
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441 public List<Path> getClean() {
55
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442 return proper(clean);
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443 }
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444
93
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445 public List<Path> getMissing() {
55
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446 return proper(missing);
05829a70b30b Status operation extracted into separate, cache-friendly class
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447 }
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448
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449 public List<Path> getUnknown() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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450 return proper(unknown);
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451 }
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452
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453 public List<Path> getIgnored() {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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454 return proper(ignored);
05829a70b30b Status operation extracted into separate, cache-friendly class
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455 }
360
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456
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457 public Map<Path, Exception> getInvalid() {
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458 if (failures == null) {
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459 return Collections.emptyMap();
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460 }
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461 return Collections.unmodifiableMap(failures);
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462 }
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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463
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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464 private static List<Path> proper(List<Path> l) {
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465 if (l == null) {
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466 return Collections.emptyList();
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467 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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468 return Collections.unmodifiableList(l);
05829a70b30b Status operation extracted into separate, cache-friendly class
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469 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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470
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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471 //
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472 //
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473
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474 public void modified(Path fname) {
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475 modified = doAdd(modified, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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476 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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477
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diff changeset
478 public void added(Path fname) {
55
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479 added = doAdd(added, fname);
05829a70b30b Status operation extracted into separate, cache-friendly class
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480 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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481
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482 public void copied(Path fnameOrigin, Path fnameAdded) {
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483 if (copied == null) {
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484 copied = new LinkedHashMap<Path, Path>();
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485 }
74
6f1b88693d48 Complete refactoring to org.tmatesoft
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486 added(fnameAdded);
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487 copied.put(fnameAdded, fnameOrigin);
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488 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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489
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diff changeset
490 public void removed(Path fname) {
55
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491 removed = doAdd(removed, fname);
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492 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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493
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494 public void clean(Path fname) {
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495 clean = doAdd(clean, fname);
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496 }
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497
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498 public void missing(Path fname) {
55
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499 missing = doAdd(missing, fname);
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500 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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501
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502 public void unknown(Path fname) {
55
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503 unknown = doAdd(unknown, fname);
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504 }
05829a70b30b Status operation extracted into separate, cache-friendly class
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505
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506 public void ignored(Path fname) {
55
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diff changeset
507 ignored = doAdd(ignored, fname);
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508 }
360
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509
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parents: 354
diff changeset
510 public void invalid(Path fname, Exception ex) {
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511 if (failures == null) {
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diff changeset
512 failures = new LinkedHashMap<Path, Exception>();
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diff changeset
513 }
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parents: 354
diff changeset
514 failures.put(fname, ex);
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diff changeset
515 }
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
516
93
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diff changeset
517 private static List<Path> doAdd(List<Path> l, Path p) {
55
05829a70b30b Status operation extracted into separate, cache-friendly class
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diff changeset
518 if (l == null) {
93
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diff changeset
519 l = new LinkedList<Path>();
55
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520 }
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diff changeset
521 l.add(p);
55
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diff changeset
522 return l;
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
523 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
524 }
05829a70b30b Status operation extracted into separate, cache-friendly class
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
525
05829a70b30b Status operation extracted into separate, cache-friendly class
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parents:
diff changeset
526 }