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annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 418:528b6780a8bd

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A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 22 Mar 2012 21:02:20 +0100
parents ee8264d80747
children 7f136a3fa671
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.core;
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18
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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.HgInternals;
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38 import org.tmatesoft.hg.repo.HgRepository;
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39 import org.tmatesoft.hg.repo.HgStatusCollector;
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40 import org.tmatesoft.hg.util.CancelSupport;
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41 import org.tmatesoft.hg.util.CancelledException;
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42 import org.tmatesoft.hg.util.Pair;
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43 import org.tmatesoft.hg.util.Path;
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44 import org.tmatesoft.hg.util.ProgressSupport;
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47 /**
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48 * Access to changelog, 'hg log' command counterpart.
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49 *
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50 * <pre>
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51 * Usage:
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52 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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53 * </pre>
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54 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
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55 *
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56 * @author Artem Tikhomirov
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57 * @author TMate Software Ltd.
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58 */
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59 public class HgLogCommand extends HgAbstractCommand<HgLogCommand> implements HgChangelog.Inspector {
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61 private final HgRepository repo;
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62 private Set<String> users;
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63 private Set<String> branches;
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64 private int limit = 0, count = 0;
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65 private int startRev = 0, endRev = TIP;
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66 private Calendar date;
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67 private Path file;
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68 private boolean followHistory; // makes sense only when file != null
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69 private ChangesetTransformer csetTransform;
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70 private HgChangelog.ParentWalker parentHelper;
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71
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72 public HgLogCommand(HgRepository hgRepo) {
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73 repo = hgRepo;
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74 }
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76 /**
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77 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be
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78 * cleared, use new command instance in such cases.
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79 * @param user - full or partial name of the user, case-insensitive, non-null.
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80 * @return <code>this</code> instance for convenience
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81 * @throws IllegalArgumentException when argument is null
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82 */
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83 public HgLogCommand user(String user) {
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84 if (user == null) {
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85 throw new IllegalArgumentException();
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86 }
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87 if (users == null) {
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88 users = new TreeSet<String>();
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89 }
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90 users.add(user.toLowerCase());
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91 return this;
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92 }
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94 /**
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95 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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96 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection
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97 * once set, create fresh new command instead.
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98 * @param branch - branch name, case-sensitive, non-null.
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99 * @return <code>this</code> instance for convenience
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100 * @throws IllegalArgumentException when branch argument is null
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101 */
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102 public HgLogCommand branch(String branch) {
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103 if (branch == null) {
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104 throw new IllegalArgumentException();
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105 }
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106 if (branches == null) {
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107 branches = new TreeSet<String>();
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108 }
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109 branches.add(branch);
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110 return this;
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111 }
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113 // limit search to specific date
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114 // multiple?
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115 public HgLogCommand date(Calendar date) {
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116 this.date = date;
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117 // TODO post-1.0 implement
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118 // isSet(field) - false => don't use in detection of 'same date'
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119 throw HgRepository.notImplemented();
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120 }
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121
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122 /**
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123 *
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124 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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125 * @return <code>this</code> instance for convenience
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126 */
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127 public HgLogCommand limit(int num) {
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128 limit = num;
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129 return this;
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130 }
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131
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132 /**
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133 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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134 * Revision may be specified with {@link HgRepository#TIP}
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135 * @param rev1 - revision local index
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136 * @param rev2 - revision local index
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137 * @return <code>this</code> instance for convenience
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138 */
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139 public HgLogCommand range(int rev1, int rev2) {
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140 if (rev1 != TIP && rev2 != TIP) {
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141 startRev = rev2 < rev1 ? rev2 : rev1;
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142 endRev = startRev == rev2 ? rev1 : rev2;
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143 } else if (rev1 == TIP && rev2 != TIP) {
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144 startRev = rev2;
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145 endRev = rev1;
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146 } else {
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147 startRev = rev1;
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148 endRev = rev2;
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149 }
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150 return this;
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151 }
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152
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153 /**
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154 * Select specific changeset
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155 *
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156 * @param nid changeset revision
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157 * @return <code>this</code> for convenience
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158 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog
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159 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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160 */
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161 public HgLogCommand changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException {
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162 // XXX perhaps, shall support multiple (...) arguments and extend #execute to handle not only range, but also set of revisions.
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163 final int csetRevIndex = repo.getChangelog().getRevisionIndex(nid);
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164 return range(csetRevIndex, csetRevIndex);
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165 }
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166
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167 /**
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168 * Visit history of a given file only.
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169 * @param file path relative to repository root. Pass <code>null</code> to reset.
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170 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
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171 */
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172 public HgLogCommand file(Path file, boolean followCopyRename) {
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173 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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174 this.file = file;
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175 followHistory = followCopyRename;
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176 return this;
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177 }
142
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178
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179 /**
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180 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's
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181 */
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182 public HgLogCommand file(String file, boolean followCopyRename) {
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183 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
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184 }
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185
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186 /**
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187 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
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188 */
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189 public List<HgChangeset> execute() throws HgException {
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190 CollectHandler collector = new CollectHandler();
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191 try {
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192 execute(collector);
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193 } catch (CancelledException ex) {
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194 // can't happen as long as our CollectHandler doesn't throw any exception
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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 * Iterate over range of changesets configured in the command.
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202 *
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203 * @param handler callback to process changesets.
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204 * @throws HgCallbackTargetException to re-throw exception from the handler
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205 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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206 * @throws HgException in case of some other library issue
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207 * @throws CancelledException if execution of the command was cancelled
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208 * @throws IllegalArgumentException when inspector argument is null
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209 * @throws ConcurrentModificationException if this log command instance is already running
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210 */
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211 public void execute(HgChangesetHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
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212 if (handler == null) {
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213 throw new IllegalArgumentException();
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214 }
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215 if (csetTransform != null) {
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216 throw new ConcurrentModificationException();
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217 }
215
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218 final ProgressSupport progressHelper = getProgressSupport(handler);
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219 try {
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220 count = 0;
328
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221 HgChangelog.ParentWalker pw = getParentHelper(file == null); // leave it uninitialized unless we iterate whole repo
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222 // ChangesetTransfrom creates a blank PathPool, and #file(String, boolean) above
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223 // may utilize it as well. CommandContext? How about StatusCollector there as well?
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224 csetTransform = new ChangesetTransformer(repo, handler, pw, progressHelper, getCancelSupport(handler, true));
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225 if (file == null) {
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226 progressHelper.start(endRev - startRev + 1);
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227 repo.getChangelog().range(startRev, endRev, this);
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228 csetTransform.checkFailure();
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229 } else {
215
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230 progressHelper.start(-1/*XXX enum const, or a dedicated method startUnspecified(). How about startAtLeast(int)?*/);
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231 HgDataFile fileNode = repo.getFileNode(file);
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232 fileNode.history(startRev, endRev, this);
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233 csetTransform.checkFailure();
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234 if (fileNode.isCopy()) {
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235 // even if we do not follow history, report file rename
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236 do {
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237 if (handler instanceof FileHistoryHandler) {
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238 HgFileRevision src = new HgFileRevision(repo, fileNode.getCopySourceRevision(), null, fileNode.getCopySourceName());
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239 HgFileRevision dst = new HgFileRevision(repo, fileNode.getRevision(0), null, fileNode.getPath(), src.getPath());
215
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240 try {
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241 ((FileHistoryHandler) handler).copy(src, dst);
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242 } catch (HgCallbackTargetException.Wrap ex) {
215
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243 throw new HgCallbackTargetException(ex).setRevision(fileNode.getCopySourceRevision()).setFileName(fileNode.getCopySourceName());
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244 }
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245 }
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246 if (limit > 0 && count >= limit) {
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247 // if limit reach, follow is useless.
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248 break;
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249 }
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250 if (followHistory) {
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251 fileNode = repo.getFileNode(fileNode.getCopySourceName());
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252 fileNode.history(this);
215
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253 csetTransform.checkFailure();
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254 }
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255 } while (followHistory && fileNode.isCopy());
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256 }
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257 }
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258 } finally {
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259 csetTransform = null;
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260 progressHelper.done();
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261 }
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262 }
328
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263
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264 /**
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265 * Tree-wise iteration of a file history, with handy access to parent-child relations between changesets.
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266 *
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267 * @param handler callback to process changesets.
380
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268 * @throws HgCallbackTargetException to re-throw exception from the handler
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269 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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270 * @throws HgException in case of some other library issue
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271 * @throws CancelledException if execution of the command was cancelled
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272 * @throws IllegalArgumentException if command is not satisfied with its arguments
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273 * @throws ConcurrentModificationException if this log command instance is already running
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274 */
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275 public void execute(HgChangesetTreeHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
328
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276 if (handler == null) {
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277 throw new IllegalArgumentException();
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278 }
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279 if (csetTransform != null) {
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280 throw new ConcurrentModificationException();
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281 }
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282 if (file == null) {
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283 throw new IllegalArgumentException("History tree is supported for files only (at least now), please specify file");
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284 }
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285 if (followHistory) {
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286 throw new UnsupportedOperationException("Can't follow file history when building tree (yet?)");
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287 }
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288 class TreeBuildInspector implements HgChangelog.ParentInspector, HgChangelog.RevisionInspector {
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289 HistoryNode[] completeHistory;
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290 int[] commitRevisions;
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291
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292 public void next(int revisionNumber, Nodeid revision, int linkedRevision) {
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293 commitRevisions[revisionNumber] = linkedRevision;
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294 }
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295
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296 public void next(int revisionNumber, Nodeid revision, int parent1, int parent2, Nodeid nidParent1, Nodeid nidParent2) {
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297 HistoryNode p1 = null, p2 = null;
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298 if (parent1 != -1) {
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299 p1 = completeHistory[parent1];
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300 }
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301 if (parent2!= -1) {
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302 p2 = completeHistory[parent2];
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303 }
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304 completeHistory[revisionNumber] = new HistoryNode(commitRevisions[revisionNumber], revision, p1, p2);
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305 }
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306
366
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diff changeset
307 HistoryNode[] go(HgDataFile fileNode) throws HgInvalidControlFileException {
328
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308 completeHistory = new HistoryNode[fileNode.getRevisionCount()];
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309 commitRevisions = new int[completeHistory.length];
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310 fileNode.walk(0, TIP, this);
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311 return completeHistory;
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312 }
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313 };
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314 final ProgressSupport progressHelper = getProgressSupport(handler);
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315 progressHelper.start(4);
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316 final CancelSupport cancelHelper = getCancelSupport(handler, true);
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317 cancelHelper.checkCancelled();
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318 HgDataFile fileNode = repo.getFileNode(file);
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319 // build tree of nodes according to parents in file's revlog
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320 final TreeBuildInspector treeBuildInspector = new TreeBuildInspector();
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321 final HistoryNode[] completeHistory = treeBuildInspector.go(fileNode);
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322 progressHelper.worked(1);
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323 cancelHelper.checkCancelled();
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diff changeset
324 ElementImpl ei = new ElementImpl(treeBuildInspector.commitRevisions.length);
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325 final ProgressSupport ph2;
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326 if (treeBuildInspector.commitRevisions.length < 100 /*XXX is it really worth it? */) {
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diff changeset
327 ei.initTransform();
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diff changeset
328 repo.getChangelog().range(ei, treeBuildInspector.commitRevisions);
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diff changeset
329 progressHelper.worked(1);
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330 ph2 = new ProgressSupport.Sub(progressHelper, 2);
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331 } else {
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diff changeset
332 ph2 = new ProgressSupport.Sub(progressHelper, 3);
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333 }
370
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diff changeset
334 try {
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diff changeset
335 ph2.start(completeHistory.length);
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diff changeset
336 // XXX shall sort completeHistory according to changeset numbers?
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337 for (int i = 0; i < completeHistory.length; i++ ) {
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diff changeset
338 final HistoryNode n = completeHistory[i];
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diff changeset
339 handler.next(ei.init(n));
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340 ph2.worked(1);
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341 cancelHelper.checkCancelled();
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342 }
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343 } catch (HgCallbackTargetException.Wrap ex) {
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344 throw new HgCallbackTargetException(ex);
328
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345 }
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346 progressHelper.done();
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347 }
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348
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349 //
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350
154
ba2bf656f00f Changeset => RawChangeset
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diff changeset
351 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
64
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352 if (limit > 0 && count >= limit) {
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353 return;
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354 }
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355 if (branches != null && !branches.contains(cset.branch())) {
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356 return;
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357 }
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358 if (users != null) {
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359 String csetUser = cset.user().toLowerCase();
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360 boolean found = false;
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361 for (String u : users) {
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362 if (csetUser.indexOf(u) != -1) {
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363 found = true;
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364 break;
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365 }
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366 }
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367 if (!found) {
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368 return;
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369 }
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370 }
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371 if (date != null) {
418
528b6780a8bd A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
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372 // TODO post-1.0 implement date support for log
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373 }
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374 count++;
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375 csetTransform.next(revisionNumber, nodeid, cset);
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376 }
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377
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378 private HgChangelog.ParentWalker getParentHelper(boolean create) throws HgInvalidControlFileException {
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379 if (parentHelper == null && create) {
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380 parentHelper = repo.getChangelog().new ParentWalker();
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381 parentHelper.init();
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382 }
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383 return parentHelper;
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384 }
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385
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386
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387 /**
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388 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(HgChangesetHandler)} may optionally
249
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389 * implement this interface to get information about file renames. Method {@link #copy(HgFileRevision, HgFileRevision)} would
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390 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
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391 *
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392 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
249
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393 * {@link #copy(HgFileRevision, HgFileRevision)} would be invoked for the first copy/rename in the history of the file, but not
80
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394 * followed by any changesets.
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395 *
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396 * @author Artem Tikhomirov
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397 * @author TMate Software Ltd.
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398 */
370
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399 public interface FileHistoryHandler extends HgChangesetHandler { // FIXME move to stanalone class file, perhaps?
80
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400 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
370
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401 /**
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402 * @throws HgCallbackTargetException.Wrap wrapper object for any exception user code may produce. Wrapped exception would get re-thrown with {@link HgCallbackTargetException}
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403 */
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404 void copy(HgFileRevision from, HgFileRevision to) throws HgCallbackTargetException.Wrap;
80
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405 }
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406
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407 public static class CollectHandler implements HgChangesetHandler {
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408 private final List<HgChangeset> result = new LinkedList<HgChangeset>();
64
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409
129
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410 public List<HgChangeset> getChanges() {
64
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411 return Collections.unmodifiableList(result);
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412 }
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diff changeset
413
129
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414 public void next(HgChangeset changeset) {
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415 result.add(changeset.clone());
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416 }
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417 }
328
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418
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419 private static class HistoryNode {
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420 final int changeset;
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421 final Nodeid fileRevision;
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422 final HistoryNode parent1, parent2;
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423 List<HistoryNode> children;
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424
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425 HistoryNode(int cs, Nodeid revision, HistoryNode p1, HistoryNode p2) {
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diff changeset
426 changeset = cs;
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427 fileRevision = revision;
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428 parent1 = p1;
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429 parent2 = p2;
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430 if (p1 != null) {
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diff changeset
431 p1.addChild(this);
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diff changeset
432 }
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433 if (p2 != null) {
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434 p2.addChild(this);
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435 }
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diff changeset
436 }
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diff changeset
437
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diff changeset
438 void addChild(HistoryNode child) {
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439 if (children == null) {
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diff changeset
440 children = new ArrayList<HistoryNode>(2);
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diff changeset
441 }
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diff changeset
442 children.add(child);
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443 }
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444 }
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445
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446 private class ElementImpl implements HgChangesetTreeHandler.TreeElement, HgChangelog.Inspector {
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447 private HistoryNode historyNode;
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448 private Pair<HgChangeset, HgChangeset> parents;
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449 private List<HgChangeset> children;
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450 private IntMap<HgChangeset> cachedChangesets;
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451 private ChangesetTransformer.Transformation transform;
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452 private Nodeid changesetRevision;
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diff changeset
453 private Pair<Nodeid,Nodeid> parentRevisions;
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diff changeset
454 private List<Nodeid> childRevisions;
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455
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456 public ElementImpl(int total) {
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diff changeset
457 cachedChangesets = new IntMap<HgChangeset>(total);
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diff changeset
458 }
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diff changeset
459
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diff changeset
460 ElementImpl init(HistoryNode n) {
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diff changeset
461 historyNode = n;
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462 parents = null;
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463 children = null;
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464 changesetRevision = null;
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465 parentRevisions = null;
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466 childRevisions = null;
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467 return this;
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468 }
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469
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470 public Nodeid fileRevision() {
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471 return historyNode.fileRevision;
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472 }
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473
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diff changeset
474 public HgChangeset changeset() throws HgException {
328
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475 return get(historyNode.changeset)[0];
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476 }
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diff changeset
477
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diff changeset
478 public Pair<HgChangeset, HgChangeset> parents() throws HgException {
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diff changeset
479 if (parents != null) {
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480 return parents;
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diff changeset
481 }
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482 HistoryNode p;
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483 final int p1, p2;
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484 if ((p = historyNode.parent1) != null) {
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diff changeset
485 p1 = p.changeset;
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diff changeset
486 } else {
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diff changeset
487 p1 = -1;
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488 }
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diff changeset
489 if ((p = historyNode.parent2) != null) {
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diff changeset
490 p2 = p.changeset;
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491 } else {
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diff changeset
492 p2 = -1;
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493 }
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494 HgChangeset[] r = get(p1, p2);
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495 return parents = new Pair<HgChangeset, HgChangeset>(r[0], r[1]);
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496 }
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diff changeset
497
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diff changeset
498 public Collection<HgChangeset> children() throws HgException {
328
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499 if (children != null) {
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diff changeset
500 return children;
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501 }
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502 if (historyNode.children == null) {
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503 children = Collections.emptyList();
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504 } else {
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505 int[] childrentChangesetNumbers = new int[historyNode.children.size()];
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diff changeset
506 int j = 0;
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507 for (HistoryNode hn : historyNode.children) {
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diff changeset
508 childrentChangesetNumbers[j++] = hn.changeset;
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509 }
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diff changeset
510 children = Arrays.asList(get(childrentChangesetNumbers));
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511 }
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diff changeset
512 return children;
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513 }
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514
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515 void populate(HgChangeset cs) {
403
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diff changeset
516 cachedChangesets.put(cs.getRevisionIndex(), cs);
328
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517 }
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diff changeset
518
403
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diff changeset
519 private HgChangeset[] get(int... changelogRevisionIndex) throws HgException {
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diff changeset
520 HgChangeset[] rv = new HgChangeset[changelogRevisionIndex.length];
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diff changeset
521 IntVector misses = new IntVector(changelogRevisionIndex.length, -1);
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diff changeset
522 for (int i = 0; i < changelogRevisionIndex.length; i++) {
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diff changeset
523 if (changelogRevisionIndex[i] == -1) {
328
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diff changeset
524 rv[i] = null;
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diff changeset
525 continue;
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diff changeset
526 }
403
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diff changeset
527 HgChangeset cached = cachedChangesets.get(changelogRevisionIndex[i]);
328
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diff changeset
528 if (cached != null) {
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diff changeset
529 rv[i] = cached;
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diff changeset
530 } else {
403
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diff changeset
531 misses.add(changelogRevisionIndex[i]);
328
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532 }
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diff changeset
533 }
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diff changeset
534 if (misses.size() > 0) {
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diff changeset
535 final int[] changesets2read = misses.toArray();
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diff changeset
536 initTransform();
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diff changeset
537 repo.getChangelog().range(this, changesets2read);
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diff changeset
538 for (int changeset2read : changesets2read) {
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diff changeset
539 HgChangeset cs = cachedChangesets.get(changeset2read);
403
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
540 if (cs == null) {
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
541 throw new HgException(String.format("Can't get changeset for revision %d", changeset2read));
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
542 }
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
543 // HgChangelog.range may reorder changesets according to their order in the changelog
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
544 // thus need to find original index
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
545 boolean sanity = false;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
546 for (int i = 0; i < changelogRevisionIndex.length; i++) {
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
547 if (changelogRevisionIndex[i] == cs.getRevisionIndex()) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
548 rv[i] = cs;
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
549 sanity = true;
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parents: 402
diff changeset
550 break;
328
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parents: 322
diff changeset
551 }
403
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parents: 402
diff changeset
552 }
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
553 if (!sanity) {
2747b0723867 FIXMEs: work on exceptions and javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
554 HgInternals.getContext(repo).getLog().error(getClass(), "Index of revision %d:%s doesn't match any of requested", cs.getRevisionIndex(), cs.getNodeid().shortNotation());
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
555 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
556 assert sanity;
328
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diff changeset
557 }
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diff changeset
558 }
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diff changeset
559 return rv;
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parents: 322
diff changeset
560 }
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parents: 322
diff changeset
561
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diff changeset
562 // init only when needed
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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parents: 354
diff changeset
563 void initTransform() throws HgInvalidControlFileException {
328
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parents: 322
diff changeset
564 if (transform == null) {
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diff changeset
565 transform = new ChangesetTransformer.Transformation(new HgStatusCollector(repo)/*XXX try to reuse from context?*/, getParentHelper(false));
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diff changeset
566 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
567 }
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diff changeset
568
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diff changeset
569 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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parents: 322
diff changeset
570 HgChangeset cs = transform.handle(revisionNumber, nodeid, cset);
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parents: 322
diff changeset
571 populate(cs.clone());
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parents: 322
diff changeset
572 }
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diff changeset
573
403
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diff changeset
574 public Nodeid changesetRevision() throws HgException {
328
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parents: 322
diff changeset
575 if (changesetRevision == null) {
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parents: 322
diff changeset
576 changesetRevision = getRevision(historyNode.changeset);
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parents: 322
diff changeset
577 }
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parents: 322
diff changeset
578 return changesetRevision;
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parents: 322
diff changeset
579 }
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parents: 322
diff changeset
580
403
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parents: 402
diff changeset
581 public Pair<Nodeid, Nodeid> parentRevisions() throws HgException {
328
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parents: 322
diff changeset
582 if (parentRevisions == null) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
583 HistoryNode p;
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diff changeset
584 final Nodeid p1, p2;
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parents: 322
diff changeset
585 if ((p = historyNode.parent1) != null) {
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parents: 322
diff changeset
586 p1 = getRevision(p.changeset);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
587 } else {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
588 p1 = Nodeid.NULL;;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
589 }
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parents: 322
diff changeset
590 if ((p = historyNode.parent2) != null) {
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parents: 322
diff changeset
591 p2 = getRevision(p.changeset);
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parents: 322
diff changeset
592 } else {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
593 p2 = Nodeid.NULL;
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parents: 322
diff changeset
594 }
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diff changeset
595 parentRevisions = new Pair<Nodeid, Nodeid>(p1, p2);
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parents: 322
diff changeset
596 }
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parents: 322
diff changeset
597 return parentRevisions;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
598 }
a674b8590362 Move file tree history to upper API level
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parents: 322
diff changeset
599
403
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diff changeset
600 public Collection<Nodeid> childRevisions() throws HgException {
328
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parents: 322
diff changeset
601 if (childRevisions != null) {
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parents: 322
diff changeset
602 return childRevisions;
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parents: 322
diff changeset
603 }
a674b8590362 Move file tree history to upper API level
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parents: 322
diff changeset
604 if (historyNode.children == null) {
a674b8590362 Move file tree history to upper API level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
605 childRevisions = Collections.emptyList();
a674b8590362 Move file tree history to upper API level
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parents: 322
diff changeset
606 } else {
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diff changeset
607 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(historyNode.children.size());
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parents: 322
diff changeset
608 for (HistoryNode hn : historyNode.children) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
609 rv.add(getRevision(hn.changeset));
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
610 }
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parents: 322
diff changeset
611 childRevisions = Collections.unmodifiableList(rv);
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parents: 322
diff changeset
612 }
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parents: 322
diff changeset
613 return childRevisions;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
614 }
a674b8590362 Move file tree history to upper API level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 322
diff changeset
615
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
616 // reading nodeid involves reading index only, guess, can afford not to optimize multiple reads
403
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 402
diff changeset
617 private Nodeid getRevision(int changelogRevisionNumber) throws HgInvalidControlFileException {
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parents: 402
diff changeset
618 // TODO [post-1.0] pipe through pool
328
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diff changeset
619 HgChangeset cs = cachedChangesets.get(changelogRevisionNumber);
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620 if (cs != null) {
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621 return cs.getNodeid();
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622 } else {
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623 return repo.getChangelog().getRevision(changelogRevisionNumber);
328
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624 }
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625 }
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626 }
64
19e9e220bf68 Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
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627 }