Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 288:b11f6a08f748

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Avoid boxing int values and list resizes on revlog read
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 10 Sep 2011 00:18:39 +0200
parents 9fb50c04f03c
children ee6b467c1a5f
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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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
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23 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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24 import org.tmatesoft.hg.repo.HgChangelog;
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25 import org.tmatesoft.hg.repo.HgRepository;
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26 import org.tmatesoft.hg.repo.HgStatusCollector;
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27 import org.tmatesoft.hg.util.Path;
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30 /**
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31 * Record in the Mercurial changelog, describing single commit.
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32 *
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33 * Not thread-safe, don't try to read from different threads
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class HgChangeset implements Cloneable {
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39 private final HgStatusCollector statusHelper;
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40 private final Path.Source pathHelper;
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42 private HgChangelog.ParentWalker parentHelper;
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44 //
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45 private RawChangeset changeset;
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46 private Nodeid nodeid;
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47
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48 //
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49 private List<HgFileRevision> modifiedFiles, addedFiles;
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50 private List<Path> deletedFiles;
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51 private int revNumber;
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52 private byte[] parent1, parent2;
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54 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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55 // and pass it around
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56 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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57 statusHelper = statusCollector;
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58 pathHelper = pathFactory;
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59 }
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61 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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62 revNumber = localRevNumber;
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63 nodeid = nid;
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64 changeset = rawChangeset.clone();
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65 modifiedFiles = addedFiles = null;
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66 deletedFiles = null;
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67 parent1 = parent2 = null;
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68 // keep references to parentHelper, statusHelper and pathHelper
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69 }
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71 /*package-local*/ void setParentHelper(HgChangelog.ParentWalker pw) {
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72 parentHelper = pw;
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73 if (parentHelper != null) {
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74 if (parentHelper.getRepo() != statusHelper.getRepo()) {
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75 throw new IllegalArgumentException();
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76 }
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77 }
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78 }
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79
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80 public int getRevision() {
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81 return revNumber;
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82 }
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83 public Nodeid getNodeid() {
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84 return nodeid;
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85 }
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86 public String getUser() {
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87 return changeset.user();
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88 }
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89 public String getComment() {
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90 return changeset.comment();
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91 }
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92 public String getBranch() {
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93 return changeset.branch();
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94 }
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96 /**
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97 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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98 */
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99 public HgDate getDate() {
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100 return new HgDate(changeset.date().getTime(), changeset.timezone());
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101 }
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102 public Nodeid getManifestRevision() {
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103 return changeset.manifest();
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104 }
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106 public List<Path> getAffectedFiles() {
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107 // reports files as recorded in changelog. Note, merge revisions may have no
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108 // files listed, and thus this method would return empty list, while
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109 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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110 // what #files() gives).
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111 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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112 for (String name : changeset.files()) {
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113 rv.add(pathHelper.path(name));
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114 }
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115 return rv;
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116 }
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117
231
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118 public List<HgFileRevision> getModifiedFiles() {
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119 if (modifiedFiles == null) {
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120 initFileChanges();
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121 }
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122 return modifiedFiles;
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123 }
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124
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125 public List<HgFileRevision> getAddedFiles() {
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126 if (addedFiles == null) {
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127 initFileChanges();
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128 }
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129 return addedFiles;
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130 }
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131
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132 public List<Path> getRemovedFiles() {
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133 if (deletedFiles == null) {
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134 initFileChanges();
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135 }
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136 return deletedFiles;
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137 }
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138
125
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139 public boolean isMerge() {
195
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140 // p1 == -1 and p2 != -1 is legitimate case
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141 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
125
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142 }
124
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143
274
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144 /**
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145 * @return never <code>null</code>
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146 */
124
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147 public Nodeid getFirstParentRevision() {
195
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148 if (parentHelper != null) {
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149 return parentHelper.safeFirstParent(nodeid);
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150 }
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151 // read once for both p1 and p2
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152 if (parent1 == null) {
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153 parent1 = new byte[20];
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154 parent2 = new byte[20];
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155 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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156 }
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157 return Nodeid.fromBinary(parent1, 0);
124
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158 }
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159
274
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160 /**
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161 * @return never <code>null</code>
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162 */
124
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163 public Nodeid getSecondParentRevision() {
195
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164 if (parentHelper != null) {
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165 return parentHelper.safeSecondParent(nodeid);
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166 }
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167 if (parent2 == null) {
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168 parent1 = new byte[20];
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169 parent2 = new byte[20];
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170 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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diff changeset
171 }
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172 return Nodeid.fromBinary(parent2, 0);
124
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173 }
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diff changeset
174
64
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175 @Override
129
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diff changeset
176 public HgChangeset clone() {
64
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177 try {
129
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178 HgChangeset copy = (HgChangeset) super.clone();
196
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179 // copy.changeset references this.changeset, doesn't need own copy
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180 return copy;
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181 } catch (CloneNotSupportedException ex) {
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182 throw new InternalError(ex.toString());
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183 }
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184 }
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185
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186 private /*synchronized*/ void initFileChanges() {
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187 ArrayList<Path> deleted = new ArrayList<Path>();
231
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diff changeset
188 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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diff changeset
189 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
94
af1f3b78b918 *StatusCollector renamed to Hg*StatusCollector
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diff changeset
190 HgStatusCollector.Record r = new HgStatusCollector.Record();
64
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191 statusHelper.change(revNumber, r);
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diff changeset
192 final HgRepository repo = statusHelper.getRepo();
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
193 for (Path s : r.getModified()) {
64
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194 Nodeid nid = r.nodeidAfterChange(s);
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diff changeset
195 if (nid == null) {
148
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support
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diff changeset
196 throw new HgBadStateException();
64
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197 }
231
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diff changeset
198 modified.add(new HgFileRevision(repo, nid, s));
64
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199 }
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
200 for (Path s : r.getAdded()) {
64
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diff changeset
201 Nodeid nid = r.nodeidAfterChange(s);
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diff changeset
202 if (nid == null) {
148
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diff changeset
203 throw new HgBadStateException();
64
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diff changeset
204 }
231
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diff changeset
205 added.add(new HgFileRevision(repo, nid, s));
64
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diff changeset
206 }
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
207 for (Path s : r.getRemoved()) {
124
cea84c5995e6 Changeset to access parent nodeids
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parents: 102
diff changeset
208 // with Path from getRemoved, may just copy
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
209 deleted.add(s);
64
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210 }
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diff changeset
211 modified.trimToSize();
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diff changeset
212 added.trimToSize();
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diff changeset
213 deleted.trimToSize();
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parents:
diff changeset
214 modifiedFiles = Collections.unmodifiableList(modified);
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parents:
diff changeset
215 addedFiles = Collections.unmodifiableList(added);
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parents:
diff changeset
216 deletedFiles = Collections.unmodifiableList(deleted);
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parents:
diff changeset
217 }
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diff changeset
218 }