Mercurial > jhg

annotate src/org/tmatesoft/hg/core/HgChangeset.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents ee6b467c1a5f
children 189dc6dc1c3e
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 import java.util.Map;
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23
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24 import org.tmatesoft.hg.repo.HgChangelog.RawChangeset;
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25 import org.tmatesoft.hg.repo.HgChangelog;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.repo.HgStatusCollector;
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28 import org.tmatesoft.hg.util.Path;
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31 /**
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32 * Record in the Mercurial changelog, describing single commit.
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33 *
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34 * Not thread-safe, don't try to read from different threads
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35 *
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36 * @author Artem Tikhomirov
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37 * @author TMate Software Ltd.
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38 */
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39 public class HgChangeset implements Cloneable {
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40 private final HgStatusCollector statusHelper;
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41 private final Path.Source pathHelper;
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43 private HgChangelog.ParentWalker parentHelper;
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45 //
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46 private RawChangeset changeset;
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47 private Nodeid nodeid;
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49 //
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50 private List<HgFileRevision> modifiedFiles, addedFiles;
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51 private List<Path> deletedFiles;
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52 private int revNumber;
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53 private byte[] parent1, parent2;
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55 // XXX consider CommandContext with StatusCollector, PathPool etc. Commands optionally get CC through a cons or create new
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56 // and pass it around
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57 /*package-local*/HgChangeset(HgStatusCollector statusCollector, Path.Source pathFactory) {
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58 statusHelper = statusCollector;
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59 pathHelper = pathFactory;
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60 }
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62 /*package-local*/ void init(int localRevNumber, Nodeid nid, RawChangeset rawChangeset) {
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63 revNumber = localRevNumber;
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64 nodeid = nid;
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65 changeset = rawChangeset.clone();
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66 modifiedFiles = addedFiles = null;
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67 deletedFiles = null;
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68 parent1 = parent2 = null;
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69 // keep references to parentHelper, statusHelper and pathHelper
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70 }
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72 /*package-local*/ void setParentHelper(HgChangelog.ParentWalker pw) {
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73 parentHelper = pw;
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74 if (parentHelper != null) {
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75 if (parentHelper.getRepo() != statusHelper.getRepo()) {
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76 throw new IllegalArgumentException();
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77 }
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78 }
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79 }
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81 public int getRevision() {
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82 return revNumber;
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83 }
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84 public Nodeid getNodeid() {
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85 return nodeid;
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86 }
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87 public String getUser() {
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88 return changeset.user();
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89 }
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90 public String getComment() {
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91 return changeset.comment();
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92 }
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93 public String getBranch() {
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94 return changeset.branch();
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95 }
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97 /**
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98 * @return used to be String, now {@link HgDate}, use {@link HgDate#toString()} to get same result as before
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99 */
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100 public HgDate getDate() {
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101 return new HgDate(changeset.date().getTime(), changeset.timezone());
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102 }
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103 public Nodeid getManifestRevision() {
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104 return changeset.manifest();
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105 }
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107 public List<Path> getAffectedFiles() {
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108 // reports files as recorded in changelog. Note, merge revisions may have no
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109 // files listed, and thus this method would return empty list, while
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110 // #getModifiedFiles() would return list with merged file(s) (because it uses status to get 'em, not
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111 // what #files() gives).
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112 ArrayList<Path> rv = new ArrayList<Path>(changeset.files().size());
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113 for (String name : changeset.files()) {
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114 rv.add(pathHelper.path(name));
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115 }
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116 return rv;
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117 }
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118
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119 public List<HgFileRevision> getModifiedFiles() {
64
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120 if (modifiedFiles == null) {
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121 initFileChanges();
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122 }
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123 return modifiedFiles;
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124 }
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125
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126 public List<HgFileRevision> getAddedFiles() {
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127 if (addedFiles == null) {
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128 initFileChanges();
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129 }
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130 return addedFiles;
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131 }
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132
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133 public List<Path> getRemovedFiles() {
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134 if (deletedFiles == null) {
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135 initFileChanges();
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136 }
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137 return deletedFiles;
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138 }
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139
125
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140 public boolean isMerge() {
195
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141 // p1 == -1 and p2 != -1 is legitimate case
274
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142 return !(getFirstParentRevision().isNull() || getSecondParentRevision().isNull());
125
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143 }
124
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144
274
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145 /**
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146 * @return never <code>null</code>
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147 */
124
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148 public Nodeid getFirstParentRevision() {
195
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149 if (parentHelper != null) {
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150 return parentHelper.safeFirstParent(nodeid);
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151 }
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152 // read once for both p1 and p2
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153 if (parent1 == null) {
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154 parent1 = new byte[20];
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155 parent2 = new byte[20];
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156 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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diff changeset
157 }
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158 return Nodeid.fromBinary(parent1, 0);
124
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159 }
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160
274
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161 /**
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162 * @return never <code>null</code>
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163 */
124
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diff changeset
164 public Nodeid getSecondParentRevision() {
195
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165 if (parentHelper != null) {
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166 return parentHelper.safeSecondParent(nodeid);
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167 }
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168 if (parent2 == null) {
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diff changeset
169 parent1 = new byte[20];
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diff changeset
170 parent2 = new byte[20];
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diff changeset
171 statusHelper.getRepo().getChangelog().parents(revNumber, new int[2], parent1, parent2);
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diff changeset
172 }
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diff changeset
173 return Nodeid.fromBinary(parent2, 0);
124
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174 }
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diff changeset
175
64
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176 @Override
129
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diff changeset
177 public HgChangeset clone() {
64
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178 try {
129
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diff changeset
179 HgChangeset copy = (HgChangeset) super.clone();
196
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diff changeset
180 // copy.changeset references this.changeset, doesn't need own copy
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181 return copy;
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182 } catch (CloneNotSupportedException ex) {
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183 throw new InternalError(ex.toString());
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184 }
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185 }
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186
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187 private /*synchronized*/ void initFileChanges() {
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diff changeset
188 ArrayList<Path> deleted = new ArrayList<Path>();
231
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diff changeset
189 ArrayList<HgFileRevision> modified = new ArrayList<HgFileRevision>();
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diff changeset
190 ArrayList<HgFileRevision> added = new ArrayList<HgFileRevision>();
94
af1f3b78b918 *StatusCollector renamed to Hg*StatusCollector
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parents: 93
diff changeset
191 HgStatusCollector.Record r = new HgStatusCollector.Record();
64
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diff changeset
192 statusHelper.change(revNumber, r);
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diff changeset
193 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
194 for (Path s : r.getModified()) {
64
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195 Nodeid nid = r.nodeidAfterChange(s);
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diff changeset
196 if (nid == null) {
148
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support
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diff changeset
197 throw new HgBadStateException();
64
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198 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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diff changeset
199 modified.add(new HgFileRevision(repo, nid, s, null));
64
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diff changeset
200 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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diff changeset
201 final Map<Path, Path> copied = r.getCopied();
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
202 for (Path s : r.getAdded()) {
64
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diff changeset
203 Nodeid nid = r.nodeidAfterChange(s);
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diff changeset
204 if (nid == null) {
148
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support
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diff changeset
205 throw new HgBadStateException();
64
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parents:
diff changeset
206 }
316
ee6b467c1a5f Supply HGFileRevision with copy information when possible, calculate it otherwise
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diff changeset
207 added.add(new HgFileRevision(repo, nid, s, copied.get(s)));
64
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diff changeset
208 }
93
d55d4eedfc57 Switch to Path instead of String in filenames returned by various status operations
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diff changeset
209 for (Path s : r.getRemoved()) {
124
cea84c5995e6 Changeset to access parent nodeids
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parents: 102
diff changeset
210 // 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
211 deleted.add(s);
64
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diff changeset
212 }
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diff changeset
213 modified.trimToSize();
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diff changeset
214 added.trimToSize();
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parents:
diff changeset
215 deleted.trimToSize();
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parents:
diff changeset
216 modifiedFiles = Collections.unmodifiableList(modified);
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parents:
diff changeset
217 addedFiles = Collections.unmodifiableList(added);
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parents:
diff changeset
218 deletedFiles = Collections.unmodifiableList(deleted);
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diff changeset
219 }
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diff changeset
220 }