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annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 431:12f668401613

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FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 29 Mar 2012 20:54:04 +0200
parents 31a89587eb04
children 1fc0da631200
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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 java.util.ArrayList;
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20 import java.util.Collections;
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21 import java.util.List;
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22 import java.util.Map;
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24 import org.tmatesoft.hg.repo.HgChangelog;
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25 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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26 import org.tmatesoft.hg.repo.HgInvalidStateException;
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.repo.HgRuntimeException;
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29 import org.tmatesoft.hg.repo.HgStatusCollector;
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30 import org.tmatesoft.hg.util.CancelledException;
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31 import org.tmatesoft.hg.util.Path;
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34 /**
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35 * Record in the Mercurial changelog, describing single commit.
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36 *
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37 * Not thread-safe, don't try to read from different threads
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38 *
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39 * @author Artem Tikhomirov
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40 * @author TMate Software Ltd.
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41 */
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42 public class HgChangeset implements Cloneable {
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43 private final HgStatusCollector statusHelper;
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44 private final Path.Source pathHelper;
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45
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46 private HgChangelog.ParentWalker parentHelper;
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47
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48 //
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49 private RawChangeset changeset;
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50 private Nodeid nodeid;
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52 //
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53 private List<HgFileRevision> modifiedFiles, addedFiles;
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54 private List<Path> deletedFiles;
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55 private int revNumber;
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56 private byte[] parent1, parent2;
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58 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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59 // and pass it around
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60 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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61 statusHelper = statusCollector;
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62 pathHelper = pathFactory;
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63 }
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65 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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66 revNumber = localRevNumber;
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67 nodeid = nid;
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68 changeset = rawChangeset.clone();
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69 modifiedFiles = addedFiles = null;
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70 deletedFiles = null;
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71 parent1 = parent2 = null;
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72 // keep references to parentHelper, statusHelper and pathHelper
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73 }
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75 /*package-local*/ void setParentHelper(HgChangelog.ParentWalker pw) {
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76 parentHelper = pw;
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77 if (parentHelper != null) {
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78 if (parentHelper.getRepo() != statusHelper.getRepo()) {
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79 throw new IllegalArgumentException();
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80 }
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81 }
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82 }
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83
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84 /**
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85 * Index of the changeset in local repository. Note, this number is relevant only for local repositories/operations, use
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86 * {@link Nodeid nodeid} to uniquely identify a revision.
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87 *
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88 * @return index of the changeset revision
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89 */
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90 public int getRevisionIndex() {
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91 return revNumber;
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92 }
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93
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94 /**
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95 * Unique identity of this changeset revision
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96 * @return revision identifier, never <code>null</code>
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97 */
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98 public Nodeid getNodeid() {
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99 return nodeid;
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100 }
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101
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102 /**
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103 * Name of the user who made this commit
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104 * @return author of the commit, never <code>null</code>
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105 */
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106 public String getUser() {
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107 return changeset.user();
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108 }
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109
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110 /**
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111 * Commit description
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112 * @return content of the corresponding field in changeset record; empty string if none specified.
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113 */
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114 public String getComment() {
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115 return changeset.comment();
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116 }
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117
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118 /**
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119 * Name of the branch this commit was made in. Returns "default" for main branch.
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120 * @return name of the branch, non-empty string
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121 */
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122 public String getBranch() {
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123 return changeset.branch();
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124 }
211
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125
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126 /**
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127 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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128 */
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129 public HgDate getDate() {
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130 return new HgDate(changeset.date().getTime(), changeset.timezone());
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131 }
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132
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133 /**
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134 * Indicates revision of manifest that tracks state of repository at the moment of this commit.
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135 * Note, may be {@link Nodeid#NULL} in certain scenarios (e.g. first changeset in an empty repository, usually by bogus tools)
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136 *
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137 * @return revision identifier, never <code>null</code>
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138 */
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139 public Nodeid getManifestRevision() {
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140 return changeset.manifest();
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141 }
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142
403
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143 /**
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144 * Lists names of files affected by this commit, as recorded in the changeset itself. Unlike {@link #getAddedFiles()},
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145 * {@link #getModifiedFiles()} and {@link #getRemovedFiles()}, this method doesn't analyze actual changes done
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146 * in the commit, rather extracts value from the changeset record.
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147 *
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148 * List returned by this method may be empty, while aforementioned methods may produce non-empty result.
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149 *
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150 * @return list of filenames, never <code>null</code>
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151 */
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152 public List<Path> getAffectedFiles() {
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153 // reports files as recorded in changelog. Note, merge revisions may have no
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154 // files listed, and thus this method would return empty list, while
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155 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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156 // what #files() gives).
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157 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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158 for (String name : changeset.files()) {
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159 rv.add(pathHelper.path(name));
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160 }
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161 return rv;
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162 }
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163
403
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164 /**
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165 * Figures out files and specific revisions thereof that were modified in this commit
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166 *
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167 * @return revisions of files modified in this commit
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168 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
403
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169 */
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170 public List<HgFileRevision> getModifiedFiles() throws HgRuntimeException {
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171 if (modifiedFiles == null) {
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172 initFileChanges();
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173 }
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174 return modifiedFiles;
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175 }
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176
403
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177 /**
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178 * Figures out files added in this commit
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179 *
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180 * @return revisions of files added in this commit
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181 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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182 */
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183 public List<HgFileRevision> getAddedFiles() throws HgRuntimeException {
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184 if (addedFiles == null) {
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185 initFileChanges();
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186 }
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187 return addedFiles;
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188 }
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189
403
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190 /**
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191 * Figures out files that were deleted as part of this commit
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192 *
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193 * @return revisions of files deleted in this commit
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194 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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195 */
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196 public List<Path> getRemovedFiles() throws HgRuntimeException {
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197 if (deletedFiles == null) {
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198 initFileChanges();
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199 }
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200 return deletedFiles;
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201 }
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202
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203 public boolean isMerge() throws HgRuntimeException {
195
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204 // p1 == -1 and p2 != -1 is legitimate case
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205 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
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206 }
124
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207
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208 /**
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209 * @return never <code>null</code>
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210 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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211 */
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212 public Nodeid getFirstParentRevision() throws HgRuntimeException {
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213 if (parentHelper != null) {
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214 return parentHelper.safeFirstParent(nodeid);
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215 }
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216 // read once for both p1 and p2
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217 if (parent1 == null) {
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218 parent1 = new byte[20];
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219 parent2 = new byte[20];
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220 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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221 }
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222 return Nodeid.fromBinary(parent1, 0);
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223 }
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224
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225 /**
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226 * @return never <code>null</code>
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227 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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228 */
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229 public Nodeid getSecondParentRevision() throws HgRuntimeException {
195
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230 if (parentHelper != null) {
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231 return parentHelper.safeSecondParent(nodeid);
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232 }
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233 if (parent2 == null) {
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234 parent1 = new byte[20];
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235 parent2 = new byte[20];
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236 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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237 }
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238 return Nodeid.fromBinary(parent2, 0);
124
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239 }
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240
403
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241 /**
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242 * Create a copy of this changeset
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243 */
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244 @Override
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245 public HgChangeset clone() {
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246 try {
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247 HgChangeset copy = (HgChangeset) super.clone();
196
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248 // copy.changeset references this.changeset, doesn't need own copy
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249 return copy;
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250 } catch (CloneNotSupportedException ex) {
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251 throw new InternalError(ex.toString());
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252 }
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253 }
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254
423
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255 private /*synchronized*/ void initFileChanges() throws HgRuntimeException {
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256 ArrayList<Path> deleted = new ArrayList<Path>();
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257 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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258 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
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259 HgStatusCollector.Record r = new HgStatusCollector.Record();
423
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260 try {
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261 statusHelper.change(revNumber, r);
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262 } catch (CancelledException ex) {
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263 // Record can't cancel
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264 throw new HgInvalidStateException("Internal error");
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265 }
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266 final HgRepository repo = statusHelper.getRepo();
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267 for (Path s : r.getModified()) {
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268 Nodeid nid = r.nodeidAfterChange(s);
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269 if (nid == null) {
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270 throw new HgInvalidStateException(String.format("For the file %s recorded as modified in changeset %d couldn't find revision after change", s, revNumber));
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271 }
415
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272 modified.add(new HgFileRevision(repo, nid, null, s, null));
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273 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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274 final Map<Path, Path> copied = r.getCopied();
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275 for (Path s : r.getAdded()) {
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276 Nodeid nid = r.nodeidAfterChange(s);
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277 if (nid == null) {
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278 throw new HgInvalidStateException(String.format("For the file %s recorded as added in changeset %d couldn't find revision after change", s, revNumber));
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279 }
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280 added.add(new HgFileRevision(repo, nid, null, s, copied.get(s)));
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281 }
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282 for (Path s : r.getRemoved()) {
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283 // with Path from getRemoved, may just copy
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284 deleted.add(s);
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285 }
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286 modified.trimToSize();
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287 added.trimToSize();
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288 deleted.trimToSize();
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289 modifiedFiles = Collections.unmodifiableList(modified);
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290 addedFiles = Collections.unmodifiableList(added);
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291 deletedFiles = Collections.unmodifiableList(deleted);
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292 }
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293 }