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annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 350:33eaed1ad130

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Allow FileIterator report any errors from the underlaying file system up to the client
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 29 Nov 2011 03:46:17 +0100
parents a674b8590362
children 5f9073eabf06
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.core;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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20
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21 import java.util.ArrayList;
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22 import java.util.Arrays;
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23 import java.util.Calendar;
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24 import java.util.Collection;
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25 import java.util.Collections;
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26 import java.util.ConcurrentModificationException;
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27 import java.util.LinkedList;
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28 import java.util.List;
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29 import java.util.Set;
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30 import java.util.TreeSet;
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31
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32 import org.tmatesoft.hg.internal.IntMap;
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33 import org.tmatesoft.hg.internal.IntVector;
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34 import org.tmatesoft.hg.repo.HgChangelog;
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35 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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36 import org.tmatesoft.hg.repo.HgDataFile;
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37 import org.tmatesoft.hg.repo.HgRepository;
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38 import org.tmatesoft.hg.repo.HgStatusCollector;
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39 import org.tmatesoft.hg.util.CancelSupport;
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40 import org.tmatesoft.hg.util.CancelledException;
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41 import org.tmatesoft.hg.util.Pair;
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42 import org.tmatesoft.hg.util.Path;
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43 import org.tmatesoft.hg.util.ProgressSupport;
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46 /**
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47 * Access to changelog, 'hg log' command counterpart.
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48 *
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49 * <pre>
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50 * Usage:
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51 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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52 * </pre>
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53 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
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54 *
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55 * @author Artem Tikhomirov
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56 * @author TMate Software Ltd.
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57 */
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58 public class HgLogCommand extends HgAbstractCommand<HgLogCommand> implements HgChangelog.Inspector {
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60 private final HgRepository repo;
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61 private Set<String> users;
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62 private Set<String> branches;
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63 private int limit = 0, count = 0;
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64 private int startRev = 0, endRev = TIP;
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65 private Calendar date;
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66 private Path file;
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67 private boolean followHistory; // makes sense only when file != null
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68 private ChangesetTransformer csetTransform;
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69 private HgChangelog.ParentWalker parentHelper;
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71 public HgLogCommand(HgRepository hgRepo) {
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72 repo = hgRepo;
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73 }
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75 /**
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76 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be
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77 * cleared, use new command instance in such cases.
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78 * @param user - full or partial name of the user, case-insensitive, non-null.
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79 * @return <code>this</code> instance for convenience
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80 * @throws IllegalArgumentException when argument is null
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81 */
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82 public HgLogCommand user(String user) {
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83 if (user == null) {
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84 throw new IllegalArgumentException();
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85 }
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86 if (users == null) {
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87 users = new TreeSet<String>();
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88 }
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89 users.add(user.toLowerCase());
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90 return this;
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91 }
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93 /**
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94 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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95 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection
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96 * once set, create fresh new command instead.
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97 * @param branch - branch name, case-sensitive, non-null.
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98 * @return <code>this</code> instance for convenience
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99 * @throws IllegalArgumentException when branch argument is null
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100 */
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101 public HgLogCommand branch(String branch) {
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102 if (branch == null) {
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103 throw new IllegalArgumentException();
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104 }
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105 if (branches == null) {
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106 branches = new TreeSet<String>();
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107 }
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108 branches.add(branch);
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109 return this;
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110 }
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112 // limit search to specific date
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113 // multiple?
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114 public HgLogCommand date(Calendar date) {
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115 this.date = date;
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116 // FIXME implement
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117 // isSet(field) - false => don't use in detection of 'same date'
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118 throw HgRepository.notImplemented();
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119 }
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120
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121 /**
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122 *
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123 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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124 * @return <code>this</code> instance for convenience
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125 */
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126 public HgLogCommand limit(int num) {
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127 limit = num;
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128 return this;
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129 }
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130
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131 /**
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132 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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133 * Revision may be specified with {@link HgRepository#TIP}
148
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134 * @param rev1 - local revision number
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135 * @param rev2 - local revision number
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136 * @return <code>this</code> instance for convenience
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137 */
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138 public HgLogCommand range(int rev1, int rev2) {
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139 if (rev1 != TIP && rev2 != TIP) {
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140 startRev = rev2 < rev1 ? rev2 : rev1;
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141 endRev = startRev == rev2 ? rev1 : rev2;
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142 } else if (rev1 == TIP && rev2 != TIP) {
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143 startRev = rev2;
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144 endRev = rev1;
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145 } else {
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146 startRev = rev1;
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147 endRev = rev2;
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148 }
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149 return this;
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150 }
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151
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152 /**
253
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153 * Select specific changeset
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154 *
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155 * @param nid changeset revision
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156 * @return <code>this</code> for convenience
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157 */
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158 public HgLogCommand changeset(Nodeid nid) {
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159 // XXX perhaps, shall support multiple (...) arguments and extend #execute to handle not only range, but also set of revisions.
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160 final int csetLocal = repo.getChangelog().getLocalRevision(nid);
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161 return range(csetLocal, csetLocal);
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162 }
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163
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164 /**
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165 * Visit history of a given file only.
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166 * @param file path relative to repository root. Pass <code>null</code> to reset.
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167 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
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168 */
131
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169 public HgLogCommand file(Path file, boolean followCopyRename) {
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170 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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171 this.file = file;
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172 followHistory = followCopyRename;
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173 return this;
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174 }
142
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175
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176 /**
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177 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's
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178 */
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179 public HgLogCommand file(String file, boolean followCopyRename) {
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180 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
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181 }
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182
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183 /**
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184 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
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185 */
215
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186 public List<HgChangeset> execute() throws HgDataStreamException {
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187 CollectHandler collector = new CollectHandler();
215
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188 try {
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189 execute(collector);
275
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190 } catch (HgException ex) {
215
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191 // can't happen as long as our CollectHandler doesn't throw any exception
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192 throw new HgBadStateException(ex.getCause());
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193 } catch (CancelledException ex) {
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194 // can't happen, see above
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195 throw new HgBadStateException(ex);
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196 }
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197 return collector.getChanges();
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198 }
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199
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200 /**
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201 *
205
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202 * @param handler callback to process changesets.
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203 * @throws IllegalArgumentException when inspector argument is null
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204 * @throws ConcurrentModificationException if this log command instance is already running
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205 */
215
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206 public void execute(HgChangesetHandler handler) throws HgDataStreamException, HgCallbackTargetException, CancelledException {
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207 if (handler == null) {
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208 throw new IllegalArgumentException();
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209 }
193
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210 if (csetTransform != null) {
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211 throw new ConcurrentModificationException();
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212 }
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213 final ProgressSupport progressHelper = getProgressSupport(handler);
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214 try {
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215 count = 0;
328
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216 HgChangelog.ParentWalker pw = getParentHelper(file == null); // leave it uninitialized unless we iterate whole repo
193
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217 // ChangesetTransfrom creates a blank PathPool, and #file(String, boolean) above
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218 // may utilize it as well. CommandContext? How about StatusCollector there as well?
322
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219 csetTransform = new ChangesetTransformer(repo, handler, pw, progressHelper, getCancelSupport(handler, true));
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220 if (file == null) {
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221 progressHelper.start(endRev - startRev + 1);
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222 repo.getChangelog().range(startRev, endRev, this);
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223 csetTransform.checkFailure();
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224 } else {
215
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225 progressHelper.start(-1/*XXX enum const, or a dedicated method startUnspecified(). How about startAtLeast(int)?*/);
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226 HgDataFile fileNode = repo.getFileNode(file);
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227 fileNode.history(startRev, endRev, this);
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228 csetTransform.checkFailure();
126
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229 if (fileNode.isCopy()) {
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230 // even if we do not follow history, report file rename
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231 do {
126
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232 if (handler instanceof FileHistoryHandler) {
231
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233 HgFileRevision src = new HgFileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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234 HgFileRevision dst = new HgFileRevision(repo, fileNode.getRevision(0), fileNode.getPath(), src.getPath());
215
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235 try {
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236 ((FileHistoryHandler) handler).copy(src, dst);
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237 } catch (RuntimeException ex) {
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238 throw new HgCallbackTargetException(ex).setRevision(fileNode.getCopySourceRevision()).setFileName(fileNode.getCopySourceName());
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239 }
126
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240 }
80
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241 if (limit > 0 && count >= limit) {
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242 // if limit reach, follow is useless.
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243 break;
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244 }
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245 if (followHistory) {
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246 fileNode = repo.getFileNode(fileNode.getCopySourceName());
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247 fileNode.history(this);
215
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248 csetTransform.checkFailure();
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249 }
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250 } while (followHistory && fileNode.isCopy());
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251 }
77
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252 }
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253 } finally {
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254 csetTransform = null;
215
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255 progressHelper.done();
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256 }
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257 }
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258
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259 public void execute(HgChangesetTreeHandler handler) throws CancelledException {
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260 if (handler == null) {
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261 throw new IllegalArgumentException();
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262 }
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263 if (csetTransform != null) {
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264 throw new ConcurrentModificationException();
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265 }
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266 if (file == null) {
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267 throw new IllegalArgumentException("History tree is supported for files only (at least now), please specify file");
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268 }
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269 if (followHistory) {
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270 throw new UnsupportedOperationException("Can't follow file history when building tree (yet?)");
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271 }
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272 class TreeBuildInspector implements HgChangelog.ParentInspector, HgChangelog.RevisionInspector {
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273 HistoryNode[] completeHistory;
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274 int[] commitRevisions;
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275
328
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276 public void next(int revisionNumber, Nodeid revision, int linkedRevision) {
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277 commitRevisions[revisionNumber] = linkedRevision;
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278 }
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279
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280 public void next(int revisionNumber, Nodeid revision, int parent1, int parent2, Nodeid nidParent1, Nodeid nidParent2) {
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281 HistoryNode p1 = null, p2 = null;
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diff changeset
282 if (parent1 != -1) {
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diff changeset
283 p1 = completeHistory[parent1];
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284 }
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285 if (parent2!= -1) {
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286 p2 = completeHistory[parent2];
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287 }
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288 completeHistory[revisionNumber] = new HistoryNode(commitRevisions[revisionNumber], revision, p1, p2);
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289 }
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290
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291 HistoryNode[] go(HgDataFile fileNode) {
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diff changeset
292 completeHistory = new HistoryNode[fileNode.getRevisionCount()];
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293 commitRevisions = new int[completeHistory.length];
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diff changeset
294 fileNode.walk(0, TIP, this);
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295 return completeHistory;
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296 }
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297 };
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298 final ProgressSupport progressHelper = getProgressSupport(handler);
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diff changeset
299 progressHelper.start(4);
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diff changeset
300 final CancelSupport cancelHelper = getCancelSupport(handler, true);
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diff changeset
301 cancelHelper.checkCancelled();
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diff changeset
302 HgDataFile fileNode = repo.getFileNode(file);
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diff changeset
303 // build tree of nodes according to parents in file's revlog
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diff changeset
304 final TreeBuildInspector treeBuildInspector = new TreeBuildInspector();
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diff changeset
305 final HistoryNode[] completeHistory = treeBuildInspector.go(fileNode);
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diff changeset
306 progressHelper.worked(1);
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diff changeset
307 cancelHelper.checkCancelled();
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diff changeset
308 ElementImpl ei = new ElementImpl(treeBuildInspector.commitRevisions.length);
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diff changeset
309 final ProgressSupport ph2;
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diff changeset
310 if (treeBuildInspector.commitRevisions.length < 100 /*XXX is it really worth it? */) {
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diff changeset
311 ei.initTransform();
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diff changeset
312 repo.getChangelog().range(ei, treeBuildInspector.commitRevisions);
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diff changeset
313 progressHelper.worked(1);
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diff changeset
314 ph2 = new ProgressSupport.Sub(progressHelper, 2);
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diff changeset
315 } else {
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diff changeset
316 ph2 = new ProgressSupport.Sub(progressHelper, 3);
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diff changeset
317 }
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diff changeset
318 ph2.start(completeHistory.length);
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diff changeset
319 // XXX shall sort completeHistory according to changeset numbers?
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diff changeset
320 for (int i = 0; i < completeHistory.length; i++ ) {
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diff changeset
321 final HistoryNode n = completeHistory[i];
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diff changeset
322 handler.next(ei.init(n));
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diff changeset
323 ph2.worked(1);
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diff changeset
324 cancelHelper.checkCancelled();
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diff changeset
325 }
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diff changeset
326 progressHelper.done();
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diff changeset
327 }
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diff changeset
328
64
19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
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diff changeset
329 //
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parents:
diff changeset
330
154
ba2bf656f00f Changeset => RawChangeset
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diff changeset
331 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
64
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diff changeset
332 if (limit > 0 && count >= limit) {
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diff changeset
333 return;
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parents:
diff changeset
334 }
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diff changeset
335 if (branches != null && !branches.contains(cset.branch())) {
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diff changeset
336 return;
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diff changeset
337 }
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diff changeset
338 if (users != null) {
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diff changeset
339 String csetUser = cset.user().toLowerCase();
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diff changeset
340 boolean found = false;
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diff changeset
341 for (String u : users) {
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diff changeset
342 if (csetUser.indexOf(u) != -1) {
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diff changeset
343 found = true;
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diff changeset
344 break;
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diff changeset
345 }
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parents:
diff changeset
346 }
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diff changeset
347 if (!found) {
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diff changeset
348 return;
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diff changeset
349 }
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diff changeset
350 }
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diff changeset
351 if (date != null) {
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parents:
diff changeset
352 // FIXME
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diff changeset
353 }
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diff changeset
354 count++;
193
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diff changeset
355 csetTransform.next(revisionNumber, nodeid, cset);
64
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diff changeset
356 }
195
c9b305df0b89 Optimization: use ParentWalker to get changeset's parents, if possible. Do not keep duplicating nodeids and strings in manifest revisions
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diff changeset
357
328
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diff changeset
358 private HgChangelog.ParentWalker getParentHelper(boolean create) {
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diff changeset
359 if (parentHelper == null && create) {
195
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360 parentHelper = repo.getChangelog().new ParentWalker();
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361 parentHelper.init();
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362 }
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363 return parentHelper;
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364 }
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365
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366
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367 /**
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368 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(HgChangesetHandler)} may optionally
249
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369 * implement this interface to get information about file renames. Method {@link #copy(HgFileRevision, HgFileRevision)} would
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370 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
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371 *
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372 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
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373 * {@link #copy(HgFileRevision, HgFileRevision)} would be invoked for the first copy/rename in the history of the file, but not
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374 * followed by any changesets.
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375 *
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376 * @author Artem Tikhomirov
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377 * @author TMate Software Ltd.
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378 */
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379 public interface FileHistoryHandler extends HgChangesetHandler {
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380 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
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381 void copy(HgFileRevision from, HgFileRevision to);
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382 }
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383
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384 public static class CollectHandler implements HgChangesetHandler {
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385 private final List<HgChangeset> result = new LinkedList<HgChangeset>();
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386
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387 public List<HgChangeset> getChanges() {
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388 return Collections.unmodifiableList(result);
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389 }
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390
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391 public void next(HgChangeset changeset) {
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392 result.add(changeset.clone());
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393 }
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394 }
328
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395
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396 private static class HistoryNode {
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397 final int changeset;
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398 final Nodeid fileRevision;
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399 final HistoryNode parent1, parent2;
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400 List<HistoryNode> children;
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401
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402 HistoryNode(int cs, Nodeid revision, HistoryNode p1, HistoryNode p2) {
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403 changeset = cs;
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404 fileRevision = revision;
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405 parent1 = p1;
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406 parent2 = p2;
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407 if (p1 != null) {
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408 p1.addChild(this);
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409 }
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410 if (p2 != null) {
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411 p2.addChild(this);
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412 }
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413 }
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414
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415 void addChild(HistoryNode child) {
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416 if (children == null) {
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417 children = new ArrayList<HistoryNode>(2);
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418 }
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419 children.add(child);
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420 }
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421 }
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422
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423 private class ElementImpl implements HgChangesetTreeHandler.TreeElement, HgChangelog.Inspector {
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424 private HistoryNode historyNode;
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425 private Pair<HgChangeset, HgChangeset> parents;
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426 private List<HgChangeset> children;
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427 private IntMap<HgChangeset> cachedChangesets;
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428 private ChangesetTransformer.Transformation transform;
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429 private Nodeid changesetRevision;
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430 private Pair<Nodeid,Nodeid> parentRevisions;
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431 private List<Nodeid> childRevisions;
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432
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433 public ElementImpl(int total) {
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434 cachedChangesets = new IntMap<HgChangeset>(total);
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435 }
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436
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437 ElementImpl init(HistoryNode n) {
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438 historyNode = n;
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439 parents = null;
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440 children = null;
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441 changesetRevision = null;
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442 parentRevisions = null;
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443 childRevisions = null;
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444 return this;
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445 }
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446
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447 public Nodeid fileRevision() {
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448 return historyNode.fileRevision;
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449 }
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450
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451 public HgChangeset changeset() {
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452 return get(historyNode.changeset)[0];
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453 }
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454
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455 public Pair<HgChangeset, HgChangeset> parents() {
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456 if (parents != null) {
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457 return parents;
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458 }
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459 HistoryNode p;
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460 final int p1, p2;
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461 if ((p = historyNode.parent1) != null) {
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462 p1 = p.changeset;
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463 } else {
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464 p1 = -1;
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465 }
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466 if ((p = historyNode.parent2) != null) {
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467 p2 = p.changeset;
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468 } else {
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469 p2 = -1;
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470 }
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471 HgChangeset[] r = get(p1, p2);
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472 return parents = new Pair<HgChangeset, HgChangeset>(r[0], r[1]);
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473 }
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474
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475 public Collection<HgChangeset> children() {
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476 if (children != null) {
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477 return children;
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478 }
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479 if (historyNode.children == null) {
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480 children = Collections.emptyList();
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481 } else {
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482 int[] childrentChangesetNumbers = new int[historyNode.children.size()];
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483 int j = 0;
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484 for (HistoryNode hn : historyNode.children) {
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485 childrentChangesetNumbers[j++] = hn.changeset;
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486 }
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487 children = Arrays.asList(get(childrentChangesetNumbers));
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488 }
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489 return children;
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490 }
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491
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492 void populate(HgChangeset cs) {
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493 cachedChangesets.put(cs.getRevision(), cs);
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494 }
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495
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496 private HgChangeset[] get(int... changelogRevisionNumber) {
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497 HgChangeset[] rv = new HgChangeset[changelogRevisionNumber.length];
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498 IntVector misses = new IntVector(changelogRevisionNumber.length, -1);
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499 for (int i = 0; i < changelogRevisionNumber.length; i++) {
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500 if (changelogRevisionNumber[i] == -1) {
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501 rv[i] = null;
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502 continue;
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503 }
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504 HgChangeset cached = cachedChangesets.get(changelogRevisionNumber[i]);
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505 if (cached != null) {
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506 rv[i] = cached;
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507 } else {
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508 misses.add(changelogRevisionNumber[i]);
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509 }
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510 }
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511 if (misses.size() > 0) {
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512 final int[] changesets2read = misses.toArray();
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513 initTransform();
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514 repo.getChangelog().range(this, changesets2read);
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515 for (int changeset2read : changesets2read) {
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516 HgChangeset cs = cachedChangesets.get(changeset2read);
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517 if (cs == null) {
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518 throw new HgBadStateException();
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519 }
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520 // HgChangelog.range may reorder changesets according to their order in the changelog
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521 // thus need to find original index
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522 boolean sanity = false;
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523 for (int i = 0; i < changelogRevisionNumber.length; i++) {
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524 if (changelogRevisionNumber[i] == cs.getRevision()) {
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525 rv[i] = cs;
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526 sanity = true;
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527 break;
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528 }
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529 }
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530 assert sanity;
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531 }
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532 }
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533 return rv;
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534 }
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535
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536 // init only when needed
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537 void initTransform() {
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538 if (transform == null) {
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539 transform = new ChangesetTransformer.Transformation(new HgStatusCollector(repo)/*XXX try to reuse from context?*/, getParentHelper(false));
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540 }
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541 }
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542
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543 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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544 HgChangeset cs = transform.handle(revisionNumber, nodeid, cset);
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545 populate(cs.clone());
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546 }
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547
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548 public Nodeid changesetRevision() {
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549 if (changesetRevision == null) {
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diff changeset
550 changesetRevision = getRevision(historyNode.changeset);
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551 }
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552 return changesetRevision;
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553 }
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554
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555 public Pair<Nodeid, Nodeid> parentRevisions() {
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556 if (parentRevisions == null) {
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557 HistoryNode p;
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558 final Nodeid p1, p2;
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559 if ((p = historyNode.parent1) != null) {
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560 p1 = getRevision(p.changeset);
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561 } else {
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562 p1 = Nodeid.NULL;;
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563 }
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564 if ((p = historyNode.parent2) != null) {
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565 p2 = getRevision(p.changeset);
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566 } else {
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567 p2 = Nodeid.NULL;
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568 }
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569 parentRevisions = new Pair<Nodeid, Nodeid>(p1, p2);
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570 }
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diff changeset
571 return parentRevisions;
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572 }
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573
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574 public Collection<Nodeid> childRevisions() {
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575 if (childRevisions != null) {
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576 return childRevisions;
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577 }
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578 if (historyNode.children == null) {
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diff changeset
579 childRevisions = Collections.emptyList();
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580 } else {
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diff changeset
581 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(historyNode.children.size());
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diff changeset
582 for (HistoryNode hn : historyNode.children) {
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diff changeset
583 rv.add(getRevision(hn.changeset));
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584 }
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diff changeset
585 childRevisions = Collections.unmodifiableList(rv);
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586 }
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diff changeset
587 return childRevisions;
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parents: 322
diff changeset
588 }
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diff changeset
589
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diff changeset
590 // reading nodeid involves reading index only, guess, can afford not to optimize multiple reads
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diff changeset
591 private Nodeid getRevision(int changelogRevisionNumber) {
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diff changeset
592 // XXX pipe through pool
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diff changeset
593 HgChangeset cs = cachedChangesets.get(changelogRevisionNumber);
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diff changeset
594 if (cs != null) {
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diff changeset
595 return cs.getNodeid();
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diff changeset
596 } else {
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diff changeset
597 return repo.getChangelog().getRevision(changelogRevisionNumber);
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diff changeset
598 }
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diff changeset
599 }
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diff changeset
600 }
64
19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
601 }