Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 631:8a5cdcb27b8f
AIOOBE in HgManifest.RevisionMapper. Provide more details about exception context. Create lock file atomically. Test concurrent pull-rebase and read
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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| date | Thu, 30 May 2013 15:24:17 +0200 |
| parents | 6526d8adbc0f |
| children | a937e63b6e02 |
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1 /* |
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2 * Copyright (c) 2010-2013 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.repo; |
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18 |
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19 import java.io.IOException; |
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20 import java.io.UnsupportedEncodingException; |
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21 import java.util.ArrayList; |
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22 import java.util.Arrays; |
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23 import java.util.Calendar; |
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24 import java.util.Collections; |
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25 import java.util.Date; |
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26 import java.util.Formatter; |
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27 import java.util.HashMap; |
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28 import java.util.List; |
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29 import java.util.Locale; |
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30 import java.util.Map; |
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31 import java.util.TimeZone; |
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32 |
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33 import org.tmatesoft.hg.core.Nodeid; |
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34 import org.tmatesoft.hg.internal.Callback; |
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35 import org.tmatesoft.hg.internal.DataAccess; |
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36 import org.tmatesoft.hg.internal.Lifecycle; |
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37 import org.tmatesoft.hg.internal.LifecycleBridge; |
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38 import org.tmatesoft.hg.internal.Pool; |
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39 import org.tmatesoft.hg.internal.RevlogStream; |
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40 import org.tmatesoft.hg.util.Adaptable; |
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41 import org.tmatesoft.hg.util.CancelSupport; |
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42 import org.tmatesoft.hg.util.ProgressSupport; |
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43 |
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44 /** |
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45 * Representation of the Mercurial changelog file (list of ChangeSets) |
| 153 | 46 * |
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47 * @author Artem Tikhomirov |
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48 * @author TMate Software Ltd. |
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49 */ |
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50 public final class HgChangelog extends Revlog { |
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51 |
| 153 | 52 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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53 super(hgRepo, content, true); |
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54 } |
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55 |
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56 /** |
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57 * Iterate over whole changelog |
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58 * @param inspector callback to process entries |
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59 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em> |
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60 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em> |
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61 */ |
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62 public void all(final HgChangelog.Inspector inspector) throws HgRuntimeException { |
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63 range(0, getLastRevision(), inspector); |
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64 } |
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65 |
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66 /** |
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67 * Iterate over changelog part |
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68 * @param start first changelog entry to process |
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69 * @param end last changelog entry to process |
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70 * @param inspector callback to process entries |
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71 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog. <em>Runtime exception</em> |
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72 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em> |
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73 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em> |
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74 */ |
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75 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgRuntimeException { |
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76 if (inspector == null) { |
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77 throw new IllegalArgumentException(); |
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78 } |
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79 content.iterate(start, end, true, new RawCsetParser(inspector)); |
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80 } |
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81 |
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82 /** |
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83 * @see #range(int, int, Inspector) |
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84 * @return changeset entry objects, never <code>null</code> |
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85 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog. <em>Runtime exception</em> |
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86 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em> |
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87 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em> |
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88 */ |
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89 public List<RawChangeset> range(int start, int end) throws HgRuntimeException { |
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90 final RawCsetCollector c = new RawCsetCollector(end - start + 1); |
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91 range(start, end, c); |
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92 return c.result; |
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93 } |
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94 |
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95 /** |
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96 * Access individual revisions. Note, regardless of supplied revision order, inspector gets |
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97 * changesets strictly in the order they are in the changelog. |
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98 * @param inspector callback to get changesets |
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99 * @param revisions revisions to read, unrestricted ordering. |
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100 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog <em>Runtime exception</em> |
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101 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em> |
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102 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em> |
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103 */ |
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104 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgRuntimeException { |
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105 Arrays.sort(revisions); |
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106 rangeInternal(inspector, revisions); |
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107 } |
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108 |
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109 /** |
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110 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted |
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111 */ |
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112 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgRuntimeException { |
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113 if (sortedRevisions == null || sortedRevisions.length == 0) { |
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114 return; |
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115 } |
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116 if (inspector == null) { |
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117 throw new IllegalArgumentException(); |
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118 } |
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119 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); |
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120 } |
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121 |
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122 /** |
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123 * Get changeset entry object |
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124 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog. <em>Runtime exception</em> |
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125 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em> |
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126 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em> |
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127 */ |
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128 public RawChangeset changeset(Nodeid nid) throws HgRuntimeException { |
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129 int x = getRevisionIndex(nid); |
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130 return range(x, x).get(0); |
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131 } |
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132 |
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133 @Callback |
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134 public interface Inspector { |
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135 /** |
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136 * Access next changeset |
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137 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) |
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138 * |
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139 * @param revisionIndex index of revision being inspected, local to the inspected object |
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140 * @param nodeid revision being inspected |
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141 * @param cset changeset raw data |
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142 */ |
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143 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset) throws HgRuntimeException; |
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144 } |
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145 |
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146 /** |
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147 * Entry in the Changelog |
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148 */ |
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149 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
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150 // TODO immutable |
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151 private/* final */Nodeid manifest; |
| 153 | 152 private String user; |
| 153 private String comment; | |
| 154 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
| 155 private Date time; | |
| 156 private int timezone; | |
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161
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157 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. |
| 153 | 158 private Map<String, String> extras; |
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159 |
| 153 | 160 /** |
| 161 * @see mercurial/changelog.py:read() | |
| 162 * | |
| 163 * <pre> | |
| 164 * format used: | |
| 165 * nodeid\n : manifest node in ascii | |
| 166 * user\n : user, no \n or \r allowed | |
| 167 * time tz extra\n : date (time is int or float, timezone is int) | |
| 168 * : extra is metadatas, encoded and separated by '\0' | |
| 169 * : older versions ignore it | |
| 170 * files\n\n : files modified by the cset, no \n or \r allowed | |
| 171 * (.*) : comment (free text, ideally utf-8) | |
| 172 * | |
| 173 * changelog v0 doesn't use extra | |
| 174 * </pre> | |
| 175 */ | |
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176 private RawChangeset() { |
| 153 | 177 } |
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178 |
| 153 | 179 public Nodeid manifest() { |
| 180 return manifest; | |
| 181 } | |
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182 |
| 153 | 183 public String user() { |
| 184 return user; | |
| 185 } | |
| 186 | |
| 187 public String comment() { | |
| 188 return comment; | |
| 189 } | |
| 190 | |
| 191 public List<String> files() { | |
| 192 return files; | |
| 193 } | |
| 194 | |
| 195 public Date date() { | |
| 196 return time; | |
| 197 } | |
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198 |
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199 /** |
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200 * @return time zone value, as is, positive for Western Hemisphere. |
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201 */ |
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202 public int timezone() { |
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203 return timezone; |
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204 } |
| 153 | 205 |
| 206 public String dateString() { | |
| 207 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
| 208 StringBuilder sb = new StringBuilder(30); | |
| 209 Formatter f = new Formatter(sb, Locale.US); | |
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210 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); |
| 153 | 211 // apparently timezone field records number of seconds time differs from UTC, |
| 212 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
| 213 // timezone offset to UTC, instead, hence sign change. | |
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214 // tz.setRawOffset(timezone * -1000); |
| 153 | 215 Calendar c = Calendar.getInstance(tz, Locale.US); |
| 216 c.setTime(time); | |
| 217 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
| 218 return sb.toString(); | |
| 219 } | |
| 220 | |
| 221 public Map<String, String> extras() { | |
| 222 return extras; | |
| 223 } | |
| 224 | |
| 225 public String branch() { | |
| 226 return extras.get("branch"); | |
| 227 } | |
| 228 | |
| 229 @Override | |
| 230 public String toString() { | |
| 231 StringBuilder sb = new StringBuilder(); | |
| 232 sb.append("Changeset {"); | |
| 233 sb.append("User: ").append(user).append(", "); | |
| 234 sb.append("Comment: ").append(comment).append(", "); | |
| 235 sb.append("Manifest: ").append(manifest).append(", "); | |
| 236 sb.append("Date: ").append(time).append(", "); | |
| 237 sb.append("Files: ").append(files.size()); | |
| 238 for (String s : files) { | |
| 239 sb.append(", ").append(s); | |
| 240 } | |
| 241 if (extras != null) { | |
| 242 sb.append(", Extra: ").append(extras); | |
| 243 } | |
| 244 sb.append("}"); | |
| 245 return sb.toString(); | |
| 246 } | |
| 247 | |
| 248 @Override | |
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249 public RawChangeset clone() { |
| 153 | 250 try { |
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251 return (RawChangeset) super.clone(); |
| 153 | 252 } catch (CloneNotSupportedException ex) { |
| 253 throw new InternalError(ex.toString()); | |
| 254 } | |
| 255 } | |
| 256 | |
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257 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgInvalidDataFormatException { |
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258 byte[] data = da.byteArray(); |
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259 RawChangeset rv = new RawChangeset(); |
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260 rv.init(data, 0, data.length, null); |
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261 return rv; |
| 153 | 262 } |
| 263 | |
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264 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null |
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265 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgInvalidDataFormatException { |
| 153 | 266 final int bufferEndIndex = offset + length; |
| 267 final byte lineBreak = (byte) '\n'; | |
| 268 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
| 269 if (breakIndex1 == -1) { | |
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270 throw new HgInvalidDataFormatException("Bad Changeset data"); |
| 153 | 271 } |
| 272 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
| 273 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
| 274 if (breakIndex2 == -1) { | |
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275 throw new HgInvalidDataFormatException("Bad Changeset data"); |
| 153 | 276 } |
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277 String _user; |
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278 try { |
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279 // TODO use encoding helper? Although where encoding is fixed (like here), seems to be just too much |
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280 _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1, "UTF-8"); |
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281 if (usersPool != null) { |
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282 _user = usersPool.unify(_user); |
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283 } |
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284 } catch (UnsupportedEncodingException ex) { |
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285 _user = ""; |
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286 // Could hardly happen |
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287 throw new HgInvalidDataFormatException("Bad Changeset data", ex); |
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288 } |
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289 |
| 153 | 290 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); |
| 291 if (breakIndex3 == -1) { | |
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292 throw new HgInvalidDataFormatException("Bad Changeset data"); |
| 153 | 293 } |
| 294 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 295 int space1 = _timeString.indexOf(' '); | |
| 296 if (space1 == -1) { | |
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297 throw new HgInvalidDataFormatException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3)); |
| 153 | 298 } |
| 299 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 300 if (space2 == -1) { | |
| 301 space2 = _timeString.length(); | |
| 302 } | |
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303 long unixTime = Long.parseLong(_timeString.substring(0, space1)); |
| 153 | 304 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); |
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305 // unixTime is local time, and timezone records difference of the local time to UTC. |
| 153 | 306 Date _time = new Date(unixTime * 1000); |
| 307 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 308 Map<String, String> _extrasMap; | |
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309 final String extras_branch_key = "branch"; |
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310 if (_extras == null || _extras.trim().length() == 0) { |
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311 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
| 153 | 312 } else { |
| 313 _extrasMap = new HashMap<String, String>(); | |
| 314 for (String pair : _extras.split("\00")) { | |
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315 pair = decode(pair); |
| 153 | 316 int eq = pair.indexOf(':'); |
| 317 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 318 } | |
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319 if (!_extrasMap.containsKey(extras_branch_key)) { |
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320 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
| 153 | 321 } |
| 322 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 323 } | |
| 324 | |
| 325 // | |
| 326 int lastStart = breakIndex3 + 1; | |
| 327 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 328 ArrayList<String> _files = null; | |
| 329 if (breakIndex4 > lastStart) { | |
| 330 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 331 _files = new ArrayList<String>(5); | |
| 332 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 333 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 334 lastStart = breakIndex4 + 1; | |
| 335 if (data[breakIndex4 + 1] == lineBreak) { | |
| 336 // found \n\n | |
| 337 break; | |
| 338 } else { | |
| 339 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
|
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340 } |
| 153 | 341 } |
| 342 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
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343 throw new HgInvalidDataFormatException("Bad Changeset data"); |
| 153 | 344 } |
| 345 } else { | |
| 346 breakIndex4--; | |
| 347 } | |
| 348 String _comment; | |
| 349 try { | |
| 350 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
|
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351 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper |
| 153 | 352 } catch (UnsupportedEncodingException ex) { |
| 353 _comment = ""; | |
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354 // Could hardly happen |
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355 throw new HgInvalidDataFormatException("Bad Changeset data", ex); |
| 153 | 356 } |
| 357 // change this instance at once, don't leave it partially changes in case of error | |
| 358 this.manifest = _nodeid; | |
| 359 this.user = _user; | |
| 360 this.time = _time; | |
| 361 this.timezone = _timezone; | |
| 362 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 363 this.comment = _comment; | |
| 364 this.extras = _extrasMap; | |
| 365 } | |
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366 |
| 153 | 367 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
| 368 for (int i = startOffset; i < endIndex; i++) { | |
| 369 if (src[i] == what) { | |
| 370 return i; | |
| 371 } | |
| 372 } | |
| 373 return -1; | |
| 374 } | |
|
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375 |
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376 private static String decode(String s) { |
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377 if (s != null && s.indexOf('\\') != -1) { |
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378 // TestAuxUtilities#testChangelogExtrasDecode |
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379 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00"); |
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380 } |
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381 return s; |
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382 } |
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383 } |
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384 |
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385 private static class RawCsetCollector implements Inspector { |
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386 final ArrayList<RawChangeset> result; |
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387 |
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388 public RawCsetCollector(int count) { |
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389 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); |
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390 } |
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391 |
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392 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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393 result.add(cset.clone()); |
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394 } |
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395 } |
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396 |
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397 private static class RawCsetParser implements RevlogStream.Inspector, Adaptable { |
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398 |
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399 private final Inspector inspector; |
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400 private final Pool<String> usersPool; |
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401 private final RawChangeset cset = new RawChangeset(); |
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402 // non-null when inspector uses high-level lifecycle entities (progress and/or cancel supports) |
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403 private final LifecycleBridge lifecycleStub; |
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404 // non-null when inspector relies on low-level lifecycle and is responsible |
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405 // to proceed any possible high-level entities himself. |
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406 private final Lifecycle inspectorLifecycle; |
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407 |
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408 public RawCsetParser(HgChangelog.Inspector delegate) { |
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409 assert delegate != null; |
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410 inspector = delegate; |
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411 usersPool = new Pool<String>(); |
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412 inspectorLifecycle = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null); |
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413 if (inspectorLifecycle == null) { |
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414 ProgressSupport ph = Adaptable.Factory.getAdapter(delegate, ProgressSupport.class, null); |
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415 CancelSupport cs = Adaptable.Factory.getAdapter(delegate, CancelSupport.class, null); |
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416 if (cs != null || ph != null) { |
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417 lifecycleStub = new LifecycleBridge(ph, cs); |
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418 } else { |
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419 lifecycleStub = null; |
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420 } |
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421 } else { |
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422 lifecycleStub = null; |
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423 } |
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424 } |
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425 |
|
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426 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) throws HgRuntimeException { |
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427 try { |
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428 byte[] data = da.byteArray(); |
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429 cset.init(data, 0, data.length, usersPool); |
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430 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse |
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431 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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432 if (lifecycleStub != null) { |
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433 lifecycleStub.nextStep(); |
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434 } |
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435 } catch (HgInvalidDataFormatException ex) { |
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436 throw ex.setRevisionIndex(revisionNumber); |
|
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437 } catch (IOException ex) { |
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438 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException) |
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439 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber); |
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440 } |
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441 } |
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442 |
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443 public <T> T getAdapter(Class<T> adapterClass) { |
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444 if (adapterClass == Lifecycle.class) { |
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445 if (inspectorLifecycle != null) { |
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446 return adapterClass.cast(inspectorLifecycle); |
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447 } |
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448 // reveal interest in lifecycle only when either progress or cancel support is there |
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449 // and inspector itself doesn't respond to lifecycle request |
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450 // lifecycleStub may still be null here (no progress and cancel), it's ok to cast(null) |
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451 return adapterClass.cast(lifecycleStub); |
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452 |
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453 } |
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454 return Adaptable.Factory.getAdapter(inspector, adapterClass, null); |
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455 } |
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456 |
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457 } |
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458 } |