Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 495:abfbe81154b5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Do not use exception when only metadata processing is needed. For hg4j repo, status 0:-1 changed from 500 to 60 ms
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Oct 2012 16:03:21 +0200
parents ba36f66c32b4
children 934037edbea0
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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23
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24 import org.tmatesoft.hg.internal.PhasesHelper;
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25 import org.tmatesoft.hg.repo.HgChangelog;
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26 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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27 import org.tmatesoft.hg.repo.HgInternals;
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28 import org.tmatesoft.hg.repo.HgPhase;
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29 import org.tmatesoft.hg.repo.HgInvalidStateException;
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30 import org.tmatesoft.hg.repo.HgRepository;
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31 import org.tmatesoft.hg.repo.HgRuntimeException;
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32 import org.tmatesoft.hg.repo.HgStatusCollector;
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33 import org.tmatesoft.hg.repo.HgParentChildMap;
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34 import org.tmatesoft.hg.util.CancelledException;
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35 import org.tmatesoft.hg.util.Path;
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38 /**
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39 * Record in the Mercurial changelog, describing single commit.
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40 *
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41 * Not thread-safe, don't try to read from different threads
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42 *
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43 * @author Artem Tikhomirov
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44 * @author TMate Software Ltd.
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45 */
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46 public class HgChangeset implements Cloneable {
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48 // these get initialized
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49 private RawChangeset changeset;
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50 private int revNumber;
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51 private Nodeid nodeid;
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53 class ShareDataStruct {
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54 ShareDataStruct(HgStatusCollector statusCollector, Path.Source pathFactory) {
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55 statusHelper = statusCollector;
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56 pathHelper = pathFactory;
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57 }
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58 public final HgStatusCollector statusHelper;
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59 public final Path.Source pathHelper;
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61 public HgParentChildMap<HgChangelog> parentHelper;
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62 public PhasesHelper phaseHelper;
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63 };
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65 // Helpers/utilities shared among few instances of HgChangeset
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66 private final ShareDataStruct shared;
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68 // these are built on demand
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69 private List<HgFileRevision> modifiedFiles, addedFiles;
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70 private List<Path> deletedFiles;
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71 private byte[] parent1, parent2;
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74 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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75 // and pass it around
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76 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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77 shared = new ShareDataStruct(statusCollector, pathFactory);
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78 }
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80 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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81 revNumber = localRevNumber;
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82 nodeid = nid;
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83 changeset = rawChangeset.clone();
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84 modifiedFiles = addedFiles = null;
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85 deletedFiles = null;
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86 parent1 = parent2 = null;
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87 // keep references to shared (and everything in there: parentHelper, statusHelper, phaseHelper and pathHelper)
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88 }
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90 /*package-local*/ void setParentHelper(HgParentChildMap<HgChangelog> pw) {
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91 if (pw != null) {
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92 if (pw.getRepo() != shared.statusHelper.getRepo()) {
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93 throw new IllegalArgumentException();
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94 }
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95 }
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96 shared.parentHelper = pw;
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97 }
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98
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99 /**
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100 * Index of the changeset in local repository. Note, this number is relevant only for local repositories/operations, use
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101 * {@link Nodeid nodeid} to uniquely identify a revision.
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102 *
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103 * @return index of the changeset revision
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104 */
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105 public int getRevisionIndex() {
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106 return revNumber;
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107 }
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108
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109 /**
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110 * Unique identity of this changeset revision
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111 * @return revision identifier, never <code>null</code>
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112 */
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113 public Nodeid getNodeid() {
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114 return nodeid;
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115 }
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116
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117 /**
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118 * Name of the user who made this commit
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119 * @return author of the commit, never <code>null</code>
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120 */
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121 public String getUser() {
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122 return changeset.user();
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123 }
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124
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125 /**
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126 * Commit description
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127 * @return content of the corresponding field in changeset record; empty string if none specified.
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128 */
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129 public String getComment() {
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130 return changeset.comment();
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131 }
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132
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133 /**
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134 * Name of the branch this commit was made in. Returns "default" for main branch.
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135 * @return name of the branch, non-empty string
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136 */
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137 public String getBranch() {
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138 return changeset.branch();
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139 }
211
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140
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141 /**
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142 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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143 */
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144 public HgDate getDate() {
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145 return new HgDate(changeset.date().getTime(), changeset.timezone());
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146 }
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147
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148 /**
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149 * Indicates revision of manifest that tracks state of repository at the moment of this commit.
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150 * 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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151 *
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152 * @return revision identifier, never <code>null</code>
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153 */
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154 public Nodeid getManifestRevision() {
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155 return changeset.manifest();
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156 }
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157
403
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158 /**
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159 * Lists names of files affected by this commit, as recorded in the changeset itself. Unlike {@link #getAddedFiles()},
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160 * {@link #getModifiedFiles()} and {@link #getRemovedFiles()}, this method doesn't analyze actual changes done
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161 * in the commit, rather extracts value from the changeset record.
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162 *
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163 * List returned by this method may be empty, while aforementioned methods may produce non-empty result.
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164 *
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165 * @return list of filenames, never <code>null</code>
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166 */
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167 public List<Path> getAffectedFiles() {
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168 // reports files as recorded in changelog. Note, merge revisions may have no
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169 // files listed, and thus this method would return empty list, while
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170 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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171 // what #files() gives).
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172 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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173 for (String name : changeset.files()) {
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174 rv.add(shared.pathHelper.path(name));
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175 }
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176 return rv;
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177 }
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178
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179 /**
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180 * Figures out files and specific revisions thereof that were modified in this commit
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181 *
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182 * @return revisions of files modified in this commit
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183 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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184 */
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185 public List<HgFileRevision> getModifiedFiles() throws HgRuntimeException {
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186 if (modifiedFiles == null) {
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187 initFileChanges();
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188 }
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189 return modifiedFiles;
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190 }
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191
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192 /**
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193 * Figures out files added in this commit
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194 *
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195 * @return revisions of files added in this commit
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196 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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197 */
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198 public List<HgFileRevision> getAddedFiles() throws HgRuntimeException {
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199 if (addedFiles == null) {
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200 initFileChanges();
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201 }
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202 return addedFiles;
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203 }
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204
403
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205 /**
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206 * Figures out files that were deleted as part of this commit
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207 *
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208 * @return revisions of files deleted in this commit
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209 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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210 */
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211 public List<Path> getRemovedFiles() throws HgRuntimeException {
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212 if (deletedFiles == null) {
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213 initFileChanges();
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214 }
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215 return deletedFiles;
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216 }
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217
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218 public boolean isMerge() throws HgRuntimeException {
195
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219 // p1 == -1 and p2 != -1 is legitimate case
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220 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
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221 }
124
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222
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223 /**
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224 * @return never <code>null</code>
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225 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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226 */
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227 public Nodeid getFirstParentRevision() throws HgRuntimeException {
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228 if (shared.parentHelper != null) {
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229 return shared.parentHelper.safeFirstParent(nodeid);
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230 }
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231 // read once for both p1 and p2
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232 if (parent1 == null) {
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233 parent1 = new byte[20];
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234 parent2 = new byte[20];
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235 getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
195
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236 }
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237 return Nodeid.fromBinary(parent1, 0);
124
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238 }
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239
274
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240 /**
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241 * @return never <code>null</code>
423
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242 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
274
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243 */
423
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244 public Nodeid getSecondParentRevision() throws HgRuntimeException {
450
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245 if (shared.parentHelper != null) {
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246 return shared.parentHelper.safeSecondParent(nodeid);
195
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247 }
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248 if (parent2 == null) {
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249 parent1 = new byte[20];
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250 parent2 = new byte[20];
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251 getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
195
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252 }
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253 return Nodeid.fromBinary(parent2, 0);
124
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254 }
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255
471
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256 /**
445
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257 * Tells the phase this changeset belongs to.
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258 * @return one of {@link HgPhase} values
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259 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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260 */
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261 public HgPhase getPhase() throws HgRuntimeException {
450
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262 if (shared.phaseHelper == null) {
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263 // XXX would be handy to obtain ProgressSupport (perhaps, from statusHelper?)
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264 // and pass it to #init(), so that there could be indication of file being read and cache being built
450
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265 synchronized (shared) {
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266 // ensure field is initialized only once
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267 if (shared.phaseHelper == null) {
493
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268 shared.phaseHelper = new PhasesHelper(HgInternals.getImplementationRepo(getRepo()), shared.parentHelper);
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269 }
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270 }
445
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271 }
450
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272 return shared.phaseHelper.getPhase(this);
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273 }
124
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274
403
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275 /**
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276 * Create a copy of this changeset
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277 */
64
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278 @Override
129
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279 public HgChangeset clone() {
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280 try {
129
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281 HgChangeset copy = (HgChangeset) super.clone();
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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282 // copy.changeset references this.changeset, doesn't need own copy
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283 return copy;
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284 } catch (CloneNotSupportedException ex) {
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285 throw new InternalError(ex.toString());
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286 }
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287 }
445
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288
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289 private HgRepository getRepo() {
450
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290 return shared.statusHelper.getRepo();
445
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291 }
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292
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293 private /*synchronized*/ void initFileChanges() throws HgRuntimeException {
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294 ArrayList<Path> deleted = new ArrayList<Path>();
231
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295 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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296 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
94
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297 HgStatusCollector.Record r = new HgStatusCollector.Record();
423
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298 try {
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299 shared.statusHelper.change(revNumber, r);
423
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300 } catch (CancelledException ex) {
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301 // Record can't cancel
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302 throw new HgInvalidStateException("Internal error");
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303 }
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304 final HgRepository repo = getRepo();
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diff changeset
305 for (Path s : r.getModified()) {
64
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306 Nodeid nid = r.nodeidAfterChange(s);
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307 if (nid == null) {
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308 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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309 }
415
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diff changeset
310 modified.add(new HgFileRevision(repo, nid, null, s, null));
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311 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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diff changeset
312 final Map<Path, Path> copied = r.getCopied();
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313 for (Path s : r.getAdded()) {
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314 Nodeid nid = r.nodeidAfterChange(s);
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315 if (nid == null) {
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316 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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317 }
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diff changeset
318 added.add(new HgFileRevision(repo, nid, null, s, copied.get(s)));
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319 }
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diff changeset
320 for (Path s : r.getRemoved()) {
124
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diff changeset
321 // with Path from getRemoved, may just copy
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322 deleted.add(s);
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323 }
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324 modified.trimToSize();
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325 added.trimToSize();
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326 deleted.trimToSize();
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327 modifiedFiles = Collections.unmodifiableList(modified);
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328 addedFiles = Collections.unmodifiableList(added);
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329 deletedFiles = Collections.unmodifiableList(deleted);
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330 }
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331 }