Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 430:d280759c2a3f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
branch information is not directly related to dirstate, clean API from this dependency
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 29 Mar 2012 18:48:23 +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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46 private HgChangelog.ParentWalker parentHelper;
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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 }