Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 233:1d389c0cb0a5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Optimize file history walk not to iterat over whole changelog for sparse and distant revisions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 03 Jun 2011 04:50:09 +0200
parents 1792b37650f2
children 6e1373b54e9b
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
102
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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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21 import java.io.IOException;
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22 import java.util.Calendar;
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23 import java.util.Collections;
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24 import java.util.ConcurrentModificationException;
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25 import java.util.LinkedList;
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26 import java.util.List;
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27 import java.util.Set;
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28 import java.util.TreeSet;
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29
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30 import org.tmatesoft.hg.repo.HgChangelog;
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31 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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32 import org.tmatesoft.hg.repo.HgDataFile;
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33 import org.tmatesoft.hg.repo.HgRepository;
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34 import org.tmatesoft.hg.util.ByteChannel;
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35 import org.tmatesoft.hg.util.CancelledException;
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36 import org.tmatesoft.hg.util.Path;
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37 import org.tmatesoft.hg.util.ProgressSupport;
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40 /**
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41 * Access to changelog, 'hg log' command counterpart.
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42 *
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43 * <pre>
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44 * Usage:
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45 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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46 * </pre>
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47 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public class HgLogCommand extends HgAbstractCommand<HgLogCommand> implements HgChangelog.Inspector {
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54 private final HgRepository repo;
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55 private Set<String> users;
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56 private Set<String> branches;
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57 private int limit = 0, count = 0;
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58 private int startRev = 0, endRev = TIP;
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59 private Calendar date;
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60 private Path file;
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61 private boolean followHistory; // makes sense only when file != null
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62 private ChangesetTransformer csetTransform;
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63 private HgChangelog.ParentWalker parentHelper;
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65 public HgLogCommand(HgRepository hgRepo) {
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66 repo = hgRepo;
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67 }
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69 /**
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70 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be
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71 * cleared, use new command instance in such cases.
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72 * @param user - full or partial name of the user, case-insensitive, non-null.
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73 * @return <code>this</code> instance for convenience
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74 * @throws IllegalArgumentException when argument is null
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75 */
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76 public HgLogCommand user(String user) {
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77 if (user == null) {
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78 throw new IllegalArgumentException();
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79 }
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80 if (users == null) {
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81 users = new TreeSet<String>();
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82 }
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83 users.add(user.toLowerCase());
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84 return this;
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85 }
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87 /**
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88 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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89 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection
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90 * once set, create fresh new command instead.
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91 * @param branch - branch name, case-sensitive, non-null.
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92 * @return <code>this</code> instance for convenience
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93 * @throws IllegalArgumentException when branch argument is null
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94 */
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95 public HgLogCommand branch(String branch) {
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96 if (branch == null) {
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97 throw new IllegalArgumentException();
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98 }
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99 if (branches == null) {
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100 branches = new TreeSet<String>();
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101 }
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102 branches.add(branch);
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103 return this;
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104 }
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106 // limit search to specific date
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107 // multiple?
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108 public HgLogCommand date(Calendar date) {
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109 this.date = date;
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110 // FIXME implement
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111 // isSet(field) - false => don't use in detection of 'same date'
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112 throw HgRepository.notImplemented();
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113 }
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114
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115 /**
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116 *
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117 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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118 * @return <code>this</code> instance for convenience
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119 */
131
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120 public HgLogCommand limit(int num) {
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121 limit = num;
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122 return this;
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123 }
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124
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125 /**
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126 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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127 * Revision may be specified with {@link HgRepository#TIP}
148
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128 * @param rev1 - local revision number
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129 * @param rev2 - local revision number
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130 * @return <code>this</code> instance for convenience
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131 */
131
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132 public HgLogCommand range(int rev1, int rev2) {
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133 if (rev1 != TIP && rev2 != TIP) {
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134 startRev = rev2 < rev1 ? rev2 : rev1;
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135 endRev = startRev == rev2 ? rev1 : rev2;
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136 } else if (rev1 == TIP && rev2 != TIP) {
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137 startRev = rev2;
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138 endRev = rev1;
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139 } else {
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140 startRev = rev1;
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141 endRev = rev2;
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142 }
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143 return this;
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144 }
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145
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146 /**
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147 * Visit history of a given file only.
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148 * @param file path relative to repository root. Pass <code>null</code> to reset.
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149 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
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150 */
131
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151 public HgLogCommand file(Path file, boolean followCopyRename) {
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152 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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153 this.file = file;
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154 followHistory = followCopyRename;
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155 return this;
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156 }
142
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157
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158 /**
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159 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's
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160 */
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161 public HgLogCommand file(String file, boolean followCopyRename) {
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162 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
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163 }
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164
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165 /**
154
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166 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
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167 */
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168 public List<HgChangeset> execute() throws HgDataStreamException {
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169 CollectHandler collector = new CollectHandler();
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170 try {
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171 execute(collector);
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172 } catch (HgCallbackTargetException ex) {
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173 // can't happen as long as our CollectHandler doesn't throw any exception
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174 throw new HgBadStateException(ex.getCause());
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175 } catch (CancelledException ex) {
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176 // can't happen, see above
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177 throw new HgBadStateException(ex);
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178 }
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179 return collector.getChanges();
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180 }
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181
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182 /**
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183 *
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184 * @param handler callback to process changesets.
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185 * @throws IllegalArgumentException when inspector argument is null
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186 * @throws ConcurrentModificationException if this log command instance is already running
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187 */
215
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188 public void execute(HgChangesetHandler handler) throws HgDataStreamException, HgCallbackTargetException, CancelledException {
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189 if (handler == null) {
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190 throw new IllegalArgumentException();
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191 }
193
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192 if (csetTransform != null) {
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193 throw new ConcurrentModificationException();
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194 }
215
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195 final ProgressSupport progressHelper = getProgressSupport(handler);
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196 try {
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197 count = 0;
195
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198 HgChangelog.ParentWalker pw = parentHelper; // leave it uninitialized unless we iterate whole repo
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199 if (file == null) {
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200 pw = getParentHelper();
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201 }
193
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202 // ChangesetTransfrom creates a blank PathPool, and #file(String, boolean) above
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203 // may utilize it as well. CommandContext? How about StatusCollector there as well?
215
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204 csetTransform = new ChangesetTransformer(repo, handler, pw, progressHelper, getCancelSupport(handler));
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205 if (file == null) {
215
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206 progressHelper.start(endRev - startRev + 1);
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207 repo.getChangelog().range(startRev, endRev, this);
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208 csetTransform.checkFailure();
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209 } else {
215
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210 progressHelper.start(-1/*XXX enum const, or a dedicated method startUnspecified(). How about startAtLeast(int)?*/);
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211 HgDataFile fileNode = repo.getFileNode(file);
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212 fileNode.history(startRev, endRev, this);
215
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213 csetTransform.checkFailure();
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214 if (fileNode.isCopy()) {
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215 // even if we do not follow history, report file rename
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216 do {
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217 if (handler instanceof FileHistoryHandler) {
231
1792b37650f2 Introduced access to conflict resolution information (merge state)
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218 HgFileRevision src = new HgFileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
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219 HgFileRevision dst = new HgFileRevision(repo, fileNode.getRevision(0), fileNode.getPath());
215
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220 try {
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221 ((FileHistoryHandler) handler).copy(src, dst);
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222 } catch (RuntimeException ex) {
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223 throw new HgCallbackTargetException(ex).setRevision(fileNode.getCopySourceRevision()).setFileName(fileNode.getCopySourceName());
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224 }
126
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225 }
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226 if (limit > 0 && count >= limit) {
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227 // if limit reach, follow is useless.
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228 break;
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229 }
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230 if (followHistory) {
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231 fileNode = repo.getFileNode(fileNode.getCopySourceName());
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232 fileNode.history(this);
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233 csetTransform.checkFailure();
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234 }
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235 } while (followHistory && fileNode.isCopy());
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236 }
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237 }
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238 } finally {
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239 csetTransform = null;
215
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240 progressHelper.done();
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241 }
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242 }
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243
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244 //
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245
154
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246 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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247 if (limit > 0 && count >= limit) {
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248 return;
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249 }
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250 if (branches != null && !branches.contains(cset.branch())) {
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251 return;
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252 }
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253 if (users != null) {
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254 String csetUser = cset.user().toLowerCase();
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255 boolean found = false;
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256 for (String u : users) {
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257 if (csetUser.indexOf(u) != -1) {
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258 found = true;
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259 break;
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260 }
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261 }
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262 if (!found) {
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263 return;
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264 }
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265 }
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266 if (date != null) {
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267 // FIXME
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268 }
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269 count++;
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270 csetTransform.next(revisionNumber, nodeid, cset);
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271 }
195
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272
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273 private HgChangelog.ParentWalker getParentHelper() {
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274 if (parentHelper == null) {
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275 parentHelper = repo.getChangelog().new ParentWalker();
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276 parentHelper.init();
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277 }
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278 return parentHelper;
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279 }
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280
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281
205
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282 /**
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283 * @deprecated Use {@link HgChangesetHandler} instead. This interface is left temporarily for compatibility.
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284 */
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285 @Deprecated()
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286 public interface Handler extends HgChangesetHandler {
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287 }
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288
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289 /**
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290 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(HgChangesetHandler)} may optionally
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291 * implement this interface to get information about file renames. Method {@link #copy(FileRevision, FileRevision)} would
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292 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
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293 *
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294 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
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295 * {@link #copy(FileRevision, FileRevision)} would be invoked for the first copy/rename in the history of the file, but not
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296 * followed by any changesets.
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297 *
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298 * @author Artem Tikhomirov
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299 * @author TMate Software Ltd.
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300 */
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301 public interface FileHistoryHandler extends HgChangesetHandler {
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302 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
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303 void copy(FileRevision from, FileRevision to);
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304 }
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305
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306 public static class CollectHandler implements HgChangesetHandler {
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307 private final List<HgChangeset> result = new LinkedList<HgChangeset>();
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308
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309 public List<HgChangeset> getChanges() {
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310 return Collections.unmodifiableList(result);
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311 }
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312
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313 public void next(HgChangeset changeset) {
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314 result.add(changeset.clone());
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315 }
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316 }
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317
231
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318 /**
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319 * @deprecated pulled up, use {@link HgFileRevision} instead.
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320 */
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321 @Deprecated
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322 public interface FileRevision {
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323 public abstract Path getPath();
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324 public abstract Nodeid getRevision();
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325 public abstract void putContentTo(ByteChannel sink) throws HgDataStreamException, IOException, CancelledException;
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326 }
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327 }