Mercurial > hg4j

annotate hg4j/src/main/java/org/tmatesoft/hg/core/HgLogCommand.java @ 213:6ec4af642ba8 gradle

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Project uses Gradle for build - actual changes
author Alexander Kitaev <kitaev@gmail.com>
date Tue, 10 May 2011 10:52:53 +0200
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213
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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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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.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.RawChangeset;
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31 import org.tmatesoft.hg.repo.HgChangelog;
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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
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38
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39 /**
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40 * Access to changelog, 'hg log' command counterpart.
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41 *
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42 * <pre>
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43 * Usage:
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44 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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45 * </pre>
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46 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance).
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47 *
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48 * @author Artem Tikhomirov
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49 * @author TMate Software Ltd.
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50 */
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51 public class HgLogCommand implements HgChangelog.Inspector {
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52
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53 private final HgRepository repo;
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54 private Set<String> users;
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55 private Set<String> branches;
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56 private int limit = 0, count = 0;
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57 private int startRev = 0, endRev = TIP;
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58 private Calendar date;
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59 private Path file;
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60 private boolean followHistory; // makes sense only when file != null
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61 private ChangesetTransformer csetTransform;
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62 private HgChangelog.ParentWalker parentHelper;
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63
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64 public HgLogCommand(HgRepository hgRepo) {
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65 repo = hgRepo;
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66 }
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67
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68 /**
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69 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be
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70 * cleared, use new command instance in such cases.
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71 * @param user - full or partial name of the user, case-insensitive, non-null.
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72 * @return <code>this</code> instance for convenience
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73 * @throws IllegalArgumentException when argument is null
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74 */
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75 public HgLogCommand user(String user) {
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76 if (user == null) {
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77 throw new IllegalArgumentException();
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78 }
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79 if (users == null) {
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80 users = new TreeSet<String>();
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81 }
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82 users.add(user.toLowerCase());
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83 return this;
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84 }
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85
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86 /**
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87 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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88 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection
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89 * once set, create fresh new command instead.
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90 * @param branch - branch name, case-sensitive, non-null.
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91 * @return <code>this</code> instance for convenience
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92 * @throws IllegalArgumentException when branch argument is null
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93 */
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94 public HgLogCommand branch(String branch) {
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95 if (branch == null) {
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96 throw new IllegalArgumentException();
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97 }
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98 if (branches == null) {
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99 branches = new TreeSet<String>();
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100 }
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101 branches.add(branch);
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102 return this;
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103 }
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104
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105 // limit search to specific date
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106 // multiple?
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107 public HgLogCommand date(Calendar date) {
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108 this.date = date;
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109 // FIXME implement
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110 // isSet(field) - false => don't use in detection of 'same date'
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111 throw HgRepository.notImplemented();
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112 }
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113
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114 /**
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115 *
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116 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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117 * @return <code>this</code> instance for convenience
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118 */
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119 public HgLogCommand limit(int num) {
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120 limit = num;
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121 return this;
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122 }
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123
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124 /**
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125 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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126 * Revision may be specified with {@link HgRepository#TIP}
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127 * @param rev1 - local revision number
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128 * @param rev2 - local revision number
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129 * @return <code>this</code> instance for convenience
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130 */
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131 public HgLogCommand range(int rev1, int rev2) {
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132 if (rev1 != TIP && rev2 != TIP) {
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133 startRev = rev2 < rev1 ? rev2 : rev1;
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134 endRev = startRev == rev2 ? rev1 : rev2;
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135 } else if (rev1 == TIP && rev2 != TIP) {
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136 startRev = rev2;
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137 endRev = rev1;
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138 } else {
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139 startRev = rev1;
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140 endRev = rev2;
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141 }
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142 return this;
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143 }
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144
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145 /**
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146 * Visit history of a given file only.
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147 * @param file path relative to repository root. Pass <code>null</code> to reset.
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148 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
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149 */
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150 public HgLogCommand file(Path file, boolean followCopyRename) {
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151 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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152 this.file = file;
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153 followHistory = followCopyRename;
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154 return this;
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155 }
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156
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157 /**
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158 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's
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159 */
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160 public HgLogCommand file(String file, boolean followCopyRename) {
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161 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename);
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162 }
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163
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164 /**
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165 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list.
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166 */
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167 public List<HgChangeset> execute() throws HgException {
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168 CollectHandler collector = new CollectHandler();
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169 execute(collector);
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170 return collector.getChanges();
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171 }
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172
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173 /**
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174 *
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175 * @param handler callback to process changesets.
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176 * @throws IllegalArgumentException when inspector argument is null
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177 * @throws ConcurrentModificationException if this log command instance is already running
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178 */
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179 public void execute(HgChangesetHandler handler) throws HgException {
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180 if (handler == null) {
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181 throw new IllegalArgumentException();
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182 }
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183 if (csetTransform != null) {
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184 throw new ConcurrentModificationException();
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185 }
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186 try {
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187 count = 0;
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188 HgChangelog.ParentWalker pw = parentHelper; // leave it uninitialized unless we iterate whole repo
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189 if (file == null) {
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190 pw = getParentHelper();
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191 }
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192 // ChangesetTransfrom creates a blank PathPool, and #file(String, boolean) above
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193 // may utilize it as well. CommandContext? How about StatusCollector there as well?
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194 csetTransform = new ChangesetTransformer(repo, handler, pw);
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195 if (file == null) {
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196 repo.getChangelog().range(startRev, endRev, this);
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197 } else {
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198 HgDataFile fileNode = repo.getFileNode(file);
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199 fileNode.history(startRev, endRev, this);
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200 if (fileNode.isCopy()) {
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201 // even if we do not follow history, report file rename
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202 do {
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203 if (handler instanceof FileHistoryHandler) {
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204 FileRevision src = new FileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
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205 FileRevision dst = new FileRevision(repo, fileNode.getRevision(0), fileNode.getPath());
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206 ((FileHistoryHandler) handler).copy(src, dst);
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207 }
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208 if (limit > 0 && count >= limit) {
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209 // if limit reach, follow is useless.
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210 break;
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211 }
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212 if (followHistory) {
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213 fileNode = repo.getFileNode(fileNode.getCopySourceName());
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214 fileNode.history(this);
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215 }
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216 } while (followHistory && fileNode.isCopy());
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217 }
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218 }
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219 } finally {
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220 csetTransform = null;
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221 }
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222 }
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223
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224 //
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225
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226 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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227 if (limit > 0 && count >= limit) {
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228 return;
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229 }
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230 if (branches != null && !branches.contains(cset.branch())) {
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231 return;
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232 }
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233 if (users != null) {
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234 String csetUser = cset.user().toLowerCase();
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235 boolean found = false;
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236 for (String u : users) {
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237 if (csetUser.indexOf(u) != -1) {
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238 found = true;
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239 break;
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240 }
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241 }
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242 if (!found) {
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243 return;
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244 }
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245 }
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246 if (date != null) {
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247 // FIXME
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248 }
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249 count++;
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250 csetTransform.next(revisionNumber, nodeid, cset);
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251 }
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252
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253 private HgChangelog.ParentWalker getParentHelper() {
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254 if (parentHelper == null) {
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255 parentHelper = repo.getChangelog().new ParentWalker();
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256 parentHelper.init();
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257 }
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258 return parentHelper;
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259 }
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260
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261
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262 /**
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263 * @deprecated Use {@link HgChangesetHandler} instead. This interface is left temporarily for compatibility.
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264 */
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265 @Deprecated()
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266 public interface Handler extends HgChangesetHandler {
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267 }
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268
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269 /**
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270 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(HgChangesetHandler)} may optionally
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271 * implement this interface to get information about file renames. Method {@link #copy(FileRevision, FileRevision)} would
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272 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}.
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273 *
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274 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
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275 * {@link #copy(FileRevision, FileRevision)} would be invoked for the first copy/rename in the history of the file, but not
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276 * followed by any changesets.
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277 *
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278 * @author Artem Tikhomirov
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279 * @author TMate Software Ltd.
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280 */
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281 public interface FileHistoryHandler extends HgChangesetHandler {
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282 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
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283 void copy(FileRevision from, FileRevision to);
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284 }
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285
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286 public static class CollectHandler implements HgChangesetHandler {
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287 private final List<HgChangeset> result = new LinkedList<HgChangeset>();
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288
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289 public List<HgChangeset> getChanges() {
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290 return Collections.unmodifiableList(result);
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291 }
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292
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293 public void next(HgChangeset changeset) {
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294 result.add(changeset.clone());
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295 }
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296 }
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297
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298 public static final class FileRevision {
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299 private final HgRepository repo;
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300 private final Nodeid revision;
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301 private final Path path;
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302
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303 /*package-local*/FileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
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304 if (hgRepo == null || rev == null || p == null) {
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305 // since it's package local, it is our code to blame for non validated arguments
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306 throw new HgBadStateException();
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307 }
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308 repo = hgRepo;
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309 revision = rev;
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310 path = p;
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311 }
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312
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313 public Path getPath() {
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314 return path;
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315 }
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316 public Nodeid getRevision() {
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317 return revision;
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318 }
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319 public void putContentTo(ByteChannel sink) throws HgDataStreamException, IOException, CancelledException {
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320 HgDataFile fn = repo.getFileNode(path);
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321 int localRevision = fn.getLocalRevision(revision);
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322 fn.contentWithFilters(localRevision, sink);
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323 }
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324 }
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325 }