Mercurial > hg4j
annotate src/org/tmatesoft/hg/core/HgLogCommand.java @ 337:f377f833b780
Issue 17: temporary code to nail down the problem
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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| date | Tue, 15 Nov 2011 03:07:28 +0100 |
| parents | a674b8590362 |
| children | 5f9073eabf06 |
| 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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18 |
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP; |
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20 |
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21 import java.util.ArrayList; |
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22 import java.util.Arrays; |
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23 import java.util.Calendar; |
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24 import java.util.Collection; |
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25 import java.util.Collections; |
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26 import java.util.ConcurrentModificationException; |
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27 import java.util.LinkedList; |
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28 import java.util.List; |
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29 import java.util.Set; |
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30 import java.util.TreeSet; |
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31 |
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32 import org.tmatesoft.hg.internal.IntMap; |
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33 import org.tmatesoft.hg.internal.IntVector; |
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34 import org.tmatesoft.hg.repo.HgChangelog; |
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Changeset => RawChangeset
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35 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset; |
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36 import org.tmatesoft.hg.repo.HgDataFile; |
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37 import org.tmatesoft.hg.repo.HgRepository; |
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38 import org.tmatesoft.hg.repo.HgStatusCollector; |
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39 import org.tmatesoft.hg.util.CancelSupport; |
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40 import org.tmatesoft.hg.util.CancelledException; |
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41 import org.tmatesoft.hg.util.Pair; |
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42 import org.tmatesoft.hg.util.Path; |
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43 import org.tmatesoft.hg.util.ProgressSupport; |
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44 |
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45 |
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46 /** |
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47 * Access to changelog, 'hg log' command counterpart. |
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48 * |
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49 * <pre> |
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50 * Usage: |
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51 * new LogCommand().limit(20).branch("maintenance-2.1").user("me").execute(new MyHandler()); |
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52 * </pre> |
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53 * Not thread-safe (each thread has to use own {@link HgLogCommand} instance). |
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54 * |
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55 * @author Artem Tikhomirov |
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56 * @author TMate Software Ltd. |
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57 */ |
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58 public class HgLogCommand extends HgAbstractCommand<HgLogCommand> implements HgChangelog.Inspector { |
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59 |
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60 private final HgRepository repo; |
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61 private Set<String> users; |
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62 private Set<String> branches; |
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63 private int limit = 0, count = 0; |
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64 private int startRev = 0, endRev = TIP; |
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65 private Calendar date; |
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66 private Path file; |
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67 private boolean followHistory; // makes sense only when file != null |
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68 private ChangesetTransformer csetTransform; |
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69 private HgChangelog.ParentWalker parentHelper; |
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70 |
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71 public HgLogCommand(HgRepository hgRepo) { |
| 107 | 72 repo = hgRepo; |
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73 } |
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74 |
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75 /** |
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76 * Limit search to specified user. Multiple user names may be specified. Once set, user names can't be |
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77 * cleared, use new command instance in such cases. |
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78 * @param user - full or partial name of the user, case-insensitive, non-null. |
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79 * @return <code>this</code> instance for convenience |
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80 * @throws IllegalArgumentException when argument is null |
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81 */ |
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82 public HgLogCommand user(String user) { |
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83 if (user == null) { |
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84 throw new IllegalArgumentException(); |
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85 } |
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86 if (users == null) { |
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87 users = new TreeSet<String>(); |
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88 } |
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89 users.add(user.toLowerCase()); |
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90 return this; |
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91 } |
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92 |
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93 /** |
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94 * Limit search to specified branch. Multiple branch specification possible (changeset from any of these |
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95 * would be included in result). If unspecified, all branches are considered. There's no way to clean branch selection |
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96 * once set, create fresh new command instead. |
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97 * @param branch - branch name, case-sensitive, non-null. |
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98 * @return <code>this</code> instance for convenience |
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99 * @throws IllegalArgumentException when branch argument is null |
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100 */ |
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101 public HgLogCommand branch(String branch) { |
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102 if (branch == null) { |
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103 throw new IllegalArgumentException(); |
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104 } |
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105 if (branches == null) { |
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106 branches = new TreeSet<String>(); |
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107 } |
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108 branches.add(branch); |
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109 return this; |
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110 } |
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111 |
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112 // limit search to specific date |
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113 // multiple? |
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114 public HgLogCommand date(Calendar date) { |
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115 this.date = date; |
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116 // FIXME implement |
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117 // isSet(field) - false => don't use in detection of 'same date' |
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118 throw HgRepository.notImplemented(); |
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119 } |
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120 |
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121 /** |
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122 * |
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123 * @param num - number of changeset to produce. Pass 0 to clear the limit. |
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124 * @return <code>this</code> instance for convenience |
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125 */ |
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126 public HgLogCommand limit(int num) { |
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127 limit = num; |
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128 return this; |
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129 } |
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130 |
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131 /** |
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132 * Limit to specified subset of Changelog, [min(rev1,rev2), max(rev1,rev2)], inclusive. |
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133 * Revision may be specified with {@link HgRepository#TIP} |
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134 * @param rev1 - local revision number |
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135 * @param rev2 - local revision number |
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136 * @return <code>this</code> instance for convenience |
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137 */ |
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138 public HgLogCommand range(int rev1, int rev2) { |
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139 if (rev1 != TIP && rev2 != TIP) { |
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140 startRev = rev2 < rev1 ? rev2 : rev1; |
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141 endRev = startRev == rev2 ? rev1 : rev2; |
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142 } else if (rev1 == TIP && rev2 != TIP) { |
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143 startRev = rev2; |
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144 endRev = rev1; |
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145 } else { |
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146 startRev = rev1; |
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147 endRev = rev2; |
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148 } |
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149 return this; |
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150 } |
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151 |
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152 /** |
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153 * Select specific changeset |
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154 * |
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155 * @param nid changeset revision |
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156 * @return <code>this</code> for convenience |
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157 */ |
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158 public HgLogCommand changeset(Nodeid nid) { |
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159 // XXX perhaps, shall support multiple (...) arguments and extend #execute to handle not only range, but also set of revisions. |
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160 final int csetLocal = repo.getChangelog().getLocalRevision(nid); |
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161 return range(csetLocal, csetLocal); |
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162 } |
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163 |
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164 /** |
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165 * Visit history of a given file only. |
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166 * @param file path relative to repository root. Pass <code>null</code> to reset. |
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167 * @param followCopyRename true to report changesets of the original file(-s), if copy/rename ever occured to the file. |
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168 */ |
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169 public HgLogCommand file(Path file, boolean followCopyRename) { |
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170 // multiple? Bad idea, would need to include extra method into Handler to tell start of next file |
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171 this.file = file; |
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172 followHistory = followCopyRename; |
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173 return this; |
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174 } |
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175 |
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176 /** |
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177 * Handy analog of {@link #file(Path, boolean)} when clients' paths come from filesystem and need conversion to repository's |
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178 */ |
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179 public HgLogCommand file(String file, boolean followCopyRename) { |
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180 return file(Path.create(repo.getToRepoPathHelper().rewrite(file)), followCopyRename); |
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181 } |
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182 |
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183 /** |
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184 * Similar to {@link #execute(org.tmatesoft.hg.repo.RawChangeset.Inspector)}, collects and return result as a list. |
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185 */ |
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186 public List<HgChangeset> execute() throws HgDataStreamException { |
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187 CollectHandler collector = new CollectHandler(); |
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188 try { |
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189 execute(collector); |
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190 } catch (HgException ex) { |
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191 // can't happen as long as our CollectHandler doesn't throw any exception |
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192 throw new HgBadStateException(ex.getCause()); |
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193 } catch (CancelledException ex) { |
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194 // can't happen, see above |
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195 throw new HgBadStateException(ex); |
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196 } |
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197 return collector.getChanges(); |
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198 } |
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199 |
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200 /** |
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201 * |
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202 * @param handler callback to process changesets. |
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203 * @throws IllegalArgumentException when inspector argument is null |
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204 * @throws ConcurrentModificationException if this log command instance is already running |
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205 */ |
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206 public void execute(HgChangesetHandler handler) throws HgDataStreamException, HgCallbackTargetException, CancelledException { |
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207 if (handler == null) { |
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208 throw new IllegalArgumentException(); |
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209 } |
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210 if (csetTransform != null) { |
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211 throw new ConcurrentModificationException(); |
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212 } |
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213 final ProgressSupport progressHelper = getProgressSupport(handler); |
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214 try { |
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215 count = 0; |
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216 HgChangelog.ParentWalker pw = getParentHelper(file == null); // leave it uninitialized unless we iterate whole repo |
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217 // ChangesetTransfrom creates a blank PathPool, and #file(String, boolean) above |
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218 // may utilize it as well. CommandContext? How about StatusCollector there as well? |
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219 csetTransform = new ChangesetTransformer(repo, handler, pw, progressHelper, getCancelSupport(handler, true)); |
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220 if (file == null) { |
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221 progressHelper.start(endRev - startRev + 1); |
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222 repo.getChangelog().range(startRev, endRev, this); |
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223 csetTransform.checkFailure(); |
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224 } else { |
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225 progressHelper.start(-1/*XXX enum const, or a dedicated method startUnspecified(). How about startAtLeast(int)?*/); |
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226 HgDataFile fileNode = repo.getFileNode(file); |
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227 fileNode.history(startRev, endRev, this); |
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228 csetTransform.checkFailure(); |
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229 if (fileNode.isCopy()) { |
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230 // even if we do not follow history, report file rename |
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231 do { |
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232 if (handler instanceof FileHistoryHandler) { |
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233 HgFileRevision src = new HgFileRevision(repo, fileNode.getCopySourceRevision(), fileNode.getCopySourceName()); |
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234 HgFileRevision dst = new HgFileRevision(repo, fileNode.getRevision(0), fileNode.getPath(), src.getPath()); |
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235 try { |
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236 ((FileHistoryHandler) handler).copy(src, dst); |
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237 } catch (RuntimeException ex) { |
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238 throw new HgCallbackTargetException(ex).setRevision(fileNode.getCopySourceRevision()).setFileName(fileNode.getCopySourceName()); |
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239 } |
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240 } |
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241 if (limit > 0 && count >= limit) { |
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242 // if limit reach, follow is useless. |
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243 break; |
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244 } |
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245 if (followHistory) { |
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246 fileNode = repo.getFileNode(fileNode.getCopySourceName()); |
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247 fileNode.history(this); |
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248 csetTransform.checkFailure(); |
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249 } |
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250 } while (followHistory && fileNode.isCopy()); |
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251 } |
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252 } |
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253 } finally { |
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254 csetTransform = null; |
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255 progressHelper.done(); |
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256 } |
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257 } |
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258 |
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259 public void execute(HgChangesetTreeHandler handler) throws CancelledException { |
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260 if (handler == null) { |
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261 throw new IllegalArgumentException(); |
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262 } |
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263 if (csetTransform != null) { |
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264 throw new ConcurrentModificationException(); |
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265 } |
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266 if (file == null) { |
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267 throw new IllegalArgumentException("History tree is supported for files only (at least now), please specify file"); |
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268 } |
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269 if (followHistory) { |
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270 throw new UnsupportedOperationException("Can't follow file history when building tree (yet?)"); |
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271 } |
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272 class TreeBuildInspector implements HgChangelog.ParentInspector, HgChangelog.RevisionInspector { |
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273 HistoryNode[] completeHistory; |
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274 int[] commitRevisions; |
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275 |
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276 public void next(int revisionNumber, Nodeid revision, int linkedRevision) { |
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277 commitRevisions[revisionNumber] = linkedRevision; |
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278 } |
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279 |
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280 public void next(int revisionNumber, Nodeid revision, int parent1, int parent2, Nodeid nidParent1, Nodeid nidParent2) { |
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281 HistoryNode p1 = null, p2 = null; |
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282 if (parent1 != -1) { |
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283 p1 = completeHistory[parent1]; |
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284 } |
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285 if (parent2!= -1) { |
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286 p2 = completeHistory[parent2]; |
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287 } |
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288 completeHistory[revisionNumber] = new HistoryNode(commitRevisions[revisionNumber], revision, p1, p2); |
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289 } |
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290 |
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291 HistoryNode[] go(HgDataFile fileNode) { |
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292 completeHistory = new HistoryNode[fileNode.getRevisionCount()]; |
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293 commitRevisions = new int[completeHistory.length]; |
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294 fileNode.walk(0, TIP, this); |
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295 return completeHistory; |
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296 } |
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297 }; |
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298 final ProgressSupport progressHelper = getProgressSupport(handler); |
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299 progressHelper.start(4); |
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300 final CancelSupport cancelHelper = getCancelSupport(handler, true); |
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301 cancelHelper.checkCancelled(); |
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302 HgDataFile fileNode = repo.getFileNode(file); |
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303 // build tree of nodes according to parents in file's revlog |
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304 final TreeBuildInspector treeBuildInspector = new TreeBuildInspector(); |
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305 final HistoryNode[] completeHistory = treeBuildInspector.go(fileNode); |
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306 progressHelper.worked(1); |
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307 cancelHelper.checkCancelled(); |
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308 ElementImpl ei = new ElementImpl(treeBuildInspector.commitRevisions.length); |
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309 final ProgressSupport ph2; |
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310 if (treeBuildInspector.commitRevisions.length < 100 /*XXX is it really worth it? */) { |
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311 ei.initTransform(); |
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312 repo.getChangelog().range(ei, treeBuildInspector.commitRevisions); |
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313 progressHelper.worked(1); |
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314 ph2 = new ProgressSupport.Sub(progressHelper, 2); |
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315 } else { |
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316 ph2 = new ProgressSupport.Sub(progressHelper, 3); |
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317 } |
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318 ph2.start(completeHistory.length); |
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319 // XXX shall sort completeHistory according to changeset numbers? |
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320 for (int i = 0; i < completeHistory.length; i++ ) { |
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321 final HistoryNode n = completeHistory[i]; |
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322 handler.next(ei.init(n)); |
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323 ph2.worked(1); |
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324 cancelHelper.checkCancelled(); |
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325 } |
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326 progressHelper.done(); |
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327 } |
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328 |
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329 // |
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330 |
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331 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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332 if (limit > 0 && count >= limit) { |
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333 return; |
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334 } |
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335 if (branches != null && !branches.contains(cset.branch())) { |
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336 return; |
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337 } |
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338 if (users != null) { |
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339 String csetUser = cset.user().toLowerCase(); |
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340 boolean found = false; |
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341 for (String u : users) { |
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342 if (csetUser.indexOf(u) != -1) { |
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343 found = true; |
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344 break; |
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345 } |
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346 } |
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347 if (!found) { |
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348 return; |
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349 } |
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350 } |
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351 if (date != null) { |
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352 // FIXME |
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353 } |
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354 count++; |
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355 csetTransform.next(revisionNumber, nodeid, cset); |
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356 } |
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357 |
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358 private HgChangelog.ParentWalker getParentHelper(boolean create) { |
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359 if (parentHelper == null && create) { |
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360 parentHelper = repo.getChangelog().new ParentWalker(); |
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361 parentHelper.init(); |
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362 } |
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363 return parentHelper; |
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364 } |
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365 |
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366 |
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367 /** |
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368 * When {@link HgLogCommand} is executed against file, handler passed to {@link HgLogCommand#execute(HgChangesetHandler)} may optionally |
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369 * implement this interface to get information about file renames. Method {@link #copy(HgFileRevision, HgFileRevision)} would |
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370 * get invoked prior any changeset of the original file (if file history being followed) is reported via {@link #next(HgChangeset)}. |
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371 * |
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372 * For {@link HgLogCommand#file(Path, boolean)} with renamed file path and follow argument set to false, |
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373 * {@link #copy(HgFileRevision, HgFileRevision)} would be invoked for the first copy/rename in the history of the file, but not |
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374 * followed by any changesets. |
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375 * |
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376 * @author Artem Tikhomirov |
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377 * @author TMate Software Ltd. |
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378 */ |
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379 public interface FileHistoryHandler extends HgChangesetHandler { |
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380 // XXX perhaps, should distinguish copy from rename? And what about merged revisions and following them? |
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381 void copy(HgFileRevision from, HgFileRevision to); |
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382 } |
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383 |
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384 public static class CollectHandler implements HgChangesetHandler { |
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385 private final List<HgChangeset> result = new LinkedList<HgChangeset>(); |
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386 |
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387 public List<HgChangeset> getChanges() { |
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388 return Collections.unmodifiableList(result); |
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389 } |
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390 |
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391 public void next(HgChangeset changeset) { |
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392 result.add(changeset.clone()); |
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393 } |
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394 } |
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395 |
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396 private static class HistoryNode { |
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397 final int changeset; |
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398 final Nodeid fileRevision; |
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399 final HistoryNode parent1, parent2; |
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400 List<HistoryNode> children; |
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401 |
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402 HistoryNode(int cs, Nodeid revision, HistoryNode p1, HistoryNode p2) { |
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403 changeset = cs; |
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404 fileRevision = revision; |
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405 parent1 = p1; |
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406 parent2 = p2; |
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407 if (p1 != null) { |
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408 p1.addChild(this); |
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409 } |
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410 if (p2 != null) { |
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411 p2.addChild(this); |
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412 } |
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413 } |
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414 |
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415 void addChild(HistoryNode child) { |
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416 if (children == null) { |
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417 children = new ArrayList<HistoryNode>(2); |
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418 } |
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419 children.add(child); |
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420 } |
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421 } |
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422 |
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423 private class ElementImpl implements HgChangesetTreeHandler.TreeElement, HgChangelog.Inspector { |
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424 private HistoryNode historyNode; |
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425 private Pair<HgChangeset, HgChangeset> parents; |
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426 private List<HgChangeset> children; |
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427 private IntMap<HgChangeset> cachedChangesets; |
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428 private ChangesetTransformer.Transformation transform; |
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429 private Nodeid changesetRevision; |
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430 private Pair<Nodeid,Nodeid> parentRevisions; |
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431 private List<Nodeid> childRevisions; |
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432 |
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433 public ElementImpl(int total) { |
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434 cachedChangesets = new IntMap<HgChangeset>(total); |
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435 } |
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436 |
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437 ElementImpl init(HistoryNode n) { |
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438 historyNode = n; |
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439 parents = null; |
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440 children = null; |
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441 changesetRevision = null; |
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442 parentRevisions = null; |
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443 childRevisions = null; |
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444 return this; |
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445 } |
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446 |
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447 public Nodeid fileRevision() { |
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448 return historyNode.fileRevision; |
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449 } |
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450 |
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451 public HgChangeset changeset() { |
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452 return get(historyNode.changeset)[0]; |
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453 } |
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454 |
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455 public Pair<HgChangeset, HgChangeset> parents() { |
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456 if (parents != null) { |
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457 return parents; |
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458 } |
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459 HistoryNode p; |
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460 final int p1, p2; |
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461 if ((p = historyNode.parent1) != null) { |
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462 p1 = p.changeset; |
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463 } else { |
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464 p1 = -1; |
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465 } |
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466 if ((p = historyNode.parent2) != null) { |
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467 p2 = p.changeset; |
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468 } else { |
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469 p2 = -1; |
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470 } |
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471 HgChangeset[] r = get(p1, p2); |
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472 return parents = new Pair<HgChangeset, HgChangeset>(r[0], r[1]); |
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473 } |
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474 |
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475 public Collection<HgChangeset> children() { |
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476 if (children != null) { |
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477 return children; |
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478 } |
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479 if (historyNode.children == null) { |
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480 children = Collections.emptyList(); |
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481 } else { |
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482 int[] childrentChangesetNumbers = new int[historyNode.children.size()]; |
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483 int j = 0; |
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484 for (HistoryNode hn : historyNode.children) { |
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485 childrentChangesetNumbers[j++] = hn.changeset; |
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486 } |
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487 children = Arrays.asList(get(childrentChangesetNumbers)); |
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488 } |
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489 return children; |
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490 } |
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491 |
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492 void populate(HgChangeset cs) { |
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493 cachedChangesets.put(cs.getRevision(), cs); |
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494 } |
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495 |
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496 private HgChangeset[] get(int... changelogRevisionNumber) { |
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497 HgChangeset[] rv = new HgChangeset[changelogRevisionNumber.length]; |
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498 IntVector misses = new IntVector(changelogRevisionNumber.length, -1); |
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499 for (int i = 0; i < changelogRevisionNumber.length; i++) { |
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500 if (changelogRevisionNumber[i] == -1) { |
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501 rv[i] = null; |
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502 continue; |
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503 } |
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504 HgChangeset cached = cachedChangesets.get(changelogRevisionNumber[i]); |
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505 if (cached != null) { |
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506 rv[i] = cached; |
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507 } else { |
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508 misses.add(changelogRevisionNumber[i]); |
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509 } |
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510 } |
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511 if (misses.size() > 0) { |
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512 final int[] changesets2read = misses.toArray(); |
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513 initTransform(); |
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514 repo.getChangelog().range(this, changesets2read); |
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515 for (int changeset2read : changesets2read) { |
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516 HgChangeset cs = cachedChangesets.get(changeset2read); |
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517 if (cs == null) { |
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518 throw new HgBadStateException(); |
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519 } |
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520 // HgChangelog.range may reorder changesets according to their order in the changelog |
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521 // thus need to find original index |
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522 boolean sanity = false; |
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523 for (int i = 0; i < changelogRevisionNumber.length; i++) { |
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524 if (changelogRevisionNumber[i] == cs.getRevision()) { |
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525 rv[i] = cs; |
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526 sanity = true; |
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527 break; |
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528 } |
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529 } |
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530 assert sanity; |
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531 } |
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532 } |
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533 return rv; |
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534 } |
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535 |
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536 // init only when needed |
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537 void initTransform() { |
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538 if (transform == null) { |
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539 transform = new ChangesetTransformer.Transformation(new HgStatusCollector(repo)/*XXX try to reuse from context?*/, getParentHelper(false)); |
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540 } |
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541 } |
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542 |
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543 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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544 HgChangeset cs = transform.handle(revisionNumber, nodeid, cset); |
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545 populate(cs.clone()); |
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546 } |
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547 |
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548 public Nodeid changesetRevision() { |
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549 if (changesetRevision == null) { |
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550 changesetRevision = getRevision(historyNode.changeset); |
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551 } |
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552 return changesetRevision; |
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553 } |
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554 |
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555 public Pair<Nodeid, Nodeid> parentRevisions() { |
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556 if (parentRevisions == null) { |
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557 HistoryNode p; |
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558 final Nodeid p1, p2; |
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559 if ((p = historyNode.parent1) != null) { |
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560 p1 = getRevision(p.changeset); |
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561 } else { |
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562 p1 = Nodeid.NULL;; |
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563 } |
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564 if ((p = historyNode.parent2) != null) { |
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565 p2 = getRevision(p.changeset); |
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566 } else { |
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567 p2 = Nodeid.NULL; |
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568 } |
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569 parentRevisions = new Pair<Nodeid, Nodeid>(p1, p2); |
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570 } |
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571 return parentRevisions; |
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572 } |
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573 |
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574 public Collection<Nodeid> childRevisions() { |
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575 if (childRevisions != null) { |
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576 return childRevisions; |
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577 } |
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578 if (historyNode.children == null) { |
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579 childRevisions = Collections.emptyList(); |
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580 } else { |
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581 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(historyNode.children.size()); |
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582 for (HistoryNode hn : historyNode.children) { |
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583 rv.add(getRevision(hn.changeset)); |
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584 } |
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585 childRevisions = Collections.unmodifiableList(rv); |
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586 } |
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587 return childRevisions; |
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588 } |
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589 |
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590 // reading nodeid involves reading index only, guess, can afford not to optimize multiple reads |
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591 private Nodeid getRevision(int changelogRevisionNumber) { |
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592 // XXX pipe through pool |
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593 HgChangeset cs = cachedChangesets.get(changelogRevisionNumber); |
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594 if (cs != null) { |
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595 return cs.getNodeid(); |
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596 } else { |
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597 return repo.getChangelog().getRevision(changelogRevisionNumber); |
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598 } |
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599 } |
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600 } |
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64
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601 } |