Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 215:41a778e3fd31

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Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 17 May 2011 00:56:54 +0200
parents ffc5f6d59f7e
children 1792b37650f2
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.core;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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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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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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37f3d4a596e4 Use common low to hi-level changeset api transformer
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62 private ChangesetTransformer csetTransform;
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63 private HgChangelog.ParentWalker parentHelper;
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64
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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 {
126
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217 if (handler instanceof FileHistoryHandler) {
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218 FileRevision src = new FileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
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219 FileRevision dst = new FileRevision(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) {
126
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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 }
64
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238 } finally {
193
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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++;
193
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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
64
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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 /**
205
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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
129
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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
205
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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
129
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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
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318 public static final class FileRevision {
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319 private final HgRepository repo;
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320 private final Nodeid revision;
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321 private final Path path;
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322
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323 /*package-local*/FileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
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324 if (hgRepo == null || rev == null || p == null) {
148
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diff changeset
325 // since it's package local, it is our code to blame for non validated arguments
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326 throw new HgBadStateException();
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327 }
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328 repo = hgRepo;
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329 revision = rev;
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330 path = p;
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331 }
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332
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333 public Path getPath() {
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334 return path;
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335 }
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336 public Nodeid getRevision() {
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diff changeset
337 return revision;
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diff changeset
338 }
157
d5268ca7715b Merged branch wrap-data-access into default for resource-friendly data access. Updated API to promote that friendliness to clients (channels, not byte[]). More exceptions
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diff changeset
339 public void putContentTo(ByteChannel sink) throws HgDataStreamException, IOException, CancelledException {
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diff changeset
340 HgDataFile fn = repo.getFileNode(path);
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diff changeset
341 int localRevision = fn.getLocalRevision(revision);
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diff changeset
342 fn.contentWithFilters(localRevision, sink);
64
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343 }
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344 }
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345 }