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annotate src/org/tmatesoft/hg/core/LogCommand.java @ 84:08754fce5778

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updated design questions
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 25 Jan 2011 22:53:28 +0100
parents 4222b04f34ee
children 61eedab3eb3e
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@svnkit.com
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16 */
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17 package org.tmatesoft.hg.core;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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20
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21 import java.util.Calendar;
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22 import java.util.Collections;
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23 import java.util.ConcurrentModificationException;
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24 import java.util.LinkedList;
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25 import java.util.List;
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26 import java.util.Set;
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27 import java.util.TreeSet;
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29 import org.tmatesoft.hg.repo.Changeset;
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30 import org.tmatesoft.hg.repo.HgDataFile;
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31 import org.tmatesoft.hg.repo.HgRepository;
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32 import org.tmatesoft.hg.repo.StatusCollector;
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33 import org.tmatesoft.hg.util.PathPool;
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36 /**
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37 * <pre>
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38 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler());
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39 * </pre>
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40 * Not thread-safe (each thread has to use own {@link LogCommand} instance).
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41 *
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public class LogCommand implements Changeset.Inspector {
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46
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47 private final HgRepository repo;
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48 private Set<String> users;
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49 private Set<String> branches;
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50 private int limit = 0, count = 0;
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51 private int startRev = 0, endRev = TIP;
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52 private Handler delegate;
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53 private Calendar date;
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54 private Path file;
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55 private boolean followHistory; // makes sense only when file != null
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56 private Cset changeset;
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58 public LogCommand(HgRepository hgRepo) {
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59 this.repo = hgRepo;
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60 }
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61
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62 /**
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63 * Limit search to specified user. Multiple user names may be specified.
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64 * @param user - full or partial name of the user, case-insensitive, non-null.
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65 * @return <code>this</code> instance for convenience
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66 */
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67 public LogCommand user(String user) {
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68 if (user == null) {
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69 throw new IllegalArgumentException();
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70 }
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71 if (users == null) {
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72 users = new TreeSet<String>();
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73 }
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74 users.add(user.toLowerCase());
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75 return this;
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76 }
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77
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78 /**
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79 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these
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80 * would be included in result). If unspecified, all branches are considered.
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81 * @param branch - branch name, case-sensitive, non-null.
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82 * @return <code>this</code> instance for convenience
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83 */
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84 public LogCommand branch(String branch) {
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85 if (branch == null) {
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86 throw new IllegalArgumentException();
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87 }
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88 if (branches == null) {
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89 branches = new TreeSet<String>();
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90 }
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91 branches.add(branch);
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92 return this;
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93 }
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94
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95 // limit search to specific date
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96 // multiple?
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97 public LogCommand date(Calendar date) {
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98 this.date = date;
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99 // FIXME implement
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100 // isSet(field) - false => don't use in detection of 'same date'
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101 throw HgRepository.notImplemented();
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102 }
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103
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104 /**
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105 *
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106 * @param num - number of changeset to produce. Pass 0 to clear the limit.
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107 * @return <code>this</code> instance for convenience
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108 */
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109 public LogCommand limit(int num) {
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110 limit = num;
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111 return this;
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112 }
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113
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114 /**
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115 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive.
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116 * Revision may be specified with {@link HgRepository#TIP}
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117 * @param rev1
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118 * @param rev2
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119 * @return <code>this</code> instance for convenience
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120 */
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121 public LogCommand range(int rev1, int rev2) {
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122 if (rev1 != TIP && rev2 != TIP) {
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123 startRev = rev2 < rev1 ? rev2 : rev1;
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124 endRev = startRev == rev2 ? rev1 : rev2;
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125 } else if (rev1 == TIP && rev2 != TIP) {
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126 startRev = rev2;
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127 endRev = rev1;
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128 } else {
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129 startRev = rev1;
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130 endRev = rev2;
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131 }
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132 return this;
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133 }
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134
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135 /**
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136 * Visit history of a given file only.
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137 * @param file path relative to repository root. Pass <code>null</code> to reset.
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138 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file.
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139 */
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140 public LogCommand file(Path file, boolean followCopyRename) {
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141 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file
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142 this.file = file;
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143 followHistory = followCopyRename;
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144 return this;
64
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145 }
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146
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147 /**
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148 * Similar to {@link #execute(org.tmatesoft.hg.repo.Changeset.Inspector)}, collects and return result as a list.
64
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149 */
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150 public List<Cset> execute() {
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151 CollectHandler collector = new CollectHandler();
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152 execute(collector);
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153 return collector.getChanges();
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154 }
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155
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156 /**
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157 *
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158 * @param inspector
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159 * @throws IllegalArgumentException when inspector argument is null
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160 * @throws ConcurrentModificationException if this log command instance is already running
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161 */
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162 public void execute(Handler handler) {
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163 if (handler == null) {
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164 throw new IllegalArgumentException();
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165 }
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166 if (delegate != null) {
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167 throw new ConcurrentModificationException();
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168 }
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169 try {
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170 delegate = handler;
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171 count = 0;
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172 changeset = new Cset(new StatusCollector(repo), new PathPool(repo.getPathHelper()));
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173 if (file == null) {
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174 repo.getChangelog().range(startRev, endRev, this);
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175 } else {
80
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176 HgDataFile fileNode = repo.getFileNode(file);
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177 fileNode.history(startRev, endRev, this);
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178 if (handler instanceof FileHistoryHandler && fileNode.isCopy()) {
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179 // even if we do not follow history, report file rename
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180 do {
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181 FileRevision src = new FileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName());
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182 FileRevision dst = new FileRevision(repo, fileNode.getRevisionNumber(0), fileNode.getPath());
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183 ((FileHistoryHandler) handler).copy(src, dst);
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184 if (limit > 0 && count >= limit) {
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185 // if limit reach, follow is useless.
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186 break;
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187 }
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188 if (followHistory) {
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189 fileNode = repo.getFileNode(src.getPath());
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190 fileNode.history(this);
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191 }
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192 } while (followHistory && fileNode.isCopy());
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193 }
77
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194 }
64
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195 } finally {
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196 delegate = null;
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197 changeset = null;
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198 }
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199 }
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200
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201 //
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202
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203 public void next(int revisionNumber, Nodeid nodeid, Changeset cset) {
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204 if (limit > 0 && count >= limit) {
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205 return;
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206 }
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207 if (branches != null && !branches.contains(cset.branch())) {
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208 return;
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209 }
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210 if (users != null) {
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211 String csetUser = cset.user().toLowerCase();
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212 boolean found = false;
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213 for (String u : users) {
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214 if (csetUser.indexOf(u) != -1) {
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215 found = true;
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216 break;
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217 }
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218 }
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219 if (!found) {
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220 return;
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221 }
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222 }
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223 if (date != null) {
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224 // FIXME
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225 }
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226 count++;
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227 changeset.init(revisionNumber, nodeid, cset);
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228 delegate.next(changeset);
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229 }
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230
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231 public interface Handler {
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232 /**
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233 * @param changeset not necessarily a distinct instance each time, {@link Cset#clone() clone()} if need a copy.
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234 */
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235 void next(Cset changeset);
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236 }
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237
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238 /**
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239 * When {@link LogCommand} is executed against file, handler passed to {@link LogCommand#execute(Handler)} may optionally
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240 * implement this interface to get information about file renames. Method {@link #copy(FileRevision, FileRevision)} would
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241 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(Cset)}.
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242 *
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243 * For {@link LogCommand#file(Path, boolean)} with renamed file path and follow argument set to false,
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244 * {@link #copy(FileRevision, FileRevision)} would be invoked for the first copy/rename in the history of the file, but not
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245 * followed by any changesets.
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246 *
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247 * @author Artem Tikhomirov
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248 * @author TMate Software Ltd.
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249 */
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250 public interface FileHistoryHandler extends Handler {
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251 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them?
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252 void copy(FileRevision from, FileRevision to);
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253 }
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254
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255 public static class CollectHandler implements Handler {
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256 private final List<Cset> result = new LinkedList<Cset>();
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257
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258 public List<Cset> getChanges() {
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259 return Collections.unmodifiableList(result);
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260 }
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261
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262 public void next(Cset changeset) {
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263 result.add(changeset.clone());
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264 }
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265 }
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266
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267 public static final class FileRevision {
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268 private final HgRepository repo;
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269 private final Nodeid revision;
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270 private final Path path;
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271
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272 /*package-local*/FileRevision(HgRepository hgRepo, Nodeid rev, Path p) {
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273 if (hgRepo == null || rev == null || p == null) {
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274 throw new IllegalArgumentException();
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275 }
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276 repo = hgRepo;
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277 revision = rev;
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278 path = p;
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279 }
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280
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281 public Path getPath() {
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282 return path;
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283 }
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284 public Nodeid getRevision() {
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285 return revision;
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286 }
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287 public byte[] getContent() {
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288 // XXX Content wrapper, to allow formats other than byte[], e.g. Stream, DataAccess, etc?
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289 return repo.getFileNode(path).content(revision);
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290 }
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291 }
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292 }