Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 158:b413b16d10a5
Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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| date | Wed, 09 Mar 2011 13:16:37 +0100 |
| parents | d5268ca7715b |
| children | 9423235ca77b |
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1 /* |
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2 * Copyright (c) 2010-2011 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.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.DataAccess; |
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35 import org.tmatesoft.hg.internal.RevlogStream; |
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36 |
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37 /** |
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38 * Representation of the Mercurial changelog file (list of ChangeSets) |
| 153 | 39 * |
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40 * @author Artem Tikhomirov |
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41 * @author TMate Software Ltd. |
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42 */ |
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43 public class HgChangelog extends Revlog { |
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44 |
| 153 | 45 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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46 super(hgRepo, content); |
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47 } |
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48 |
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49 public void all(final HgChangelog.Inspector inspector) { |
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50 range(0, getLastRevision(), inspector); |
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51 } |
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52 |
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53 public void range(int start, int end, final HgChangelog.Inspector inspector) { |
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54 RevlogStream.Inspector i = new RevlogStream.Inspector() { |
| 153 | 55 |
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56 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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57 RawChangeset cset = RawChangeset.parse(da); |
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58 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse |
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59 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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60 } |
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61 }; |
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62 content.iterate(start, end, true, i); |
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63 } |
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64 |
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65 public List<RawChangeset> range(int start, int end) { |
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66 final ArrayList<RawChangeset> rv = new ArrayList<RawChangeset>(end - start + 1); |
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67 RevlogStream.Inspector i = new RevlogStream.Inspector() { |
| 153 | 68 |
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69 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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70 RawChangeset cset = RawChangeset.parse(da); |
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71 rv.add(cset); |
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72 } |
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73 }; |
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74 content.iterate(start, end, true, i); |
| 153 | 75 return rv; |
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76 } |
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77 |
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78 public void range(final HgChangelog.Inspector inspector, final int... revisions) { |
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79 if (revisions == null || revisions.length == 0) { |
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80 return; |
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81 } |
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82 RevlogStream.Inspector i = new RevlogStream.Inspector() { |
| 153 | 83 |
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84 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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85 if (Arrays.binarySearch(revisions, revisionNumber) >= 0) { |
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86 RawChangeset cset = RawChangeset.parse(da); |
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87 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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88 } |
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89 } |
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90 }; |
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91 Arrays.sort(revisions); |
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92 content.iterate(revisions[0], revisions[revisions.length - 1], true, i); |
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93 } |
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94 |
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95 public interface Inspector { |
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96 // TODO describe whether cset is new instance each time |
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97 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); |
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98 } |
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99 |
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100 /** |
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101 * Entry in the Changelog |
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102 */ |
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103 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
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104 // TODO immutable |
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105 private/* final */Nodeid manifest; |
| 153 | 106 private String user; |
| 107 private String comment; | |
| 108 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
| 109 private Date time; | |
| 110 private int timezone; | |
| 111 private Map<String, String> extras; | |
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112 |
| 153 | 113 /** |
| 114 * @see mercurial/changelog.py:read() | |
| 115 * | |
| 116 * <pre> | |
| 117 * format used: | |
| 118 * nodeid\n : manifest node in ascii | |
| 119 * user\n : user, no \n or \r allowed | |
| 120 * time tz extra\n : date (time is int or float, timezone is int) | |
| 121 * : extra is metadatas, encoded and separated by '\0' | |
| 122 * : older versions ignore it | |
| 123 * files\n\n : files modified by the cset, no \n or \r allowed | |
| 124 * (.*) : comment (free text, ideally utf-8) | |
| 125 * | |
| 126 * changelog v0 doesn't use extra | |
| 127 * </pre> | |
| 128 */ | |
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129 private RawChangeset() { |
| 153 | 130 } |
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131 |
| 153 | 132 public Nodeid manifest() { |
| 133 return manifest; | |
| 134 } | |
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135 |
| 153 | 136 public String user() { |
| 137 return user; | |
| 138 } | |
| 139 | |
| 140 public String comment() { | |
| 141 return comment; | |
| 142 } | |
| 143 | |
| 144 public List<String> files() { | |
| 145 return files; | |
| 146 } | |
| 147 | |
| 148 public Date date() { | |
| 149 return time; | |
| 150 } | |
| 151 | |
| 152 public String dateString() { | |
| 153 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
| 154 StringBuilder sb = new StringBuilder(30); | |
| 155 Formatter f = new Formatter(sb, Locale.US); | |
| 156 TimeZone tz = TimeZone.getTimeZone("GMT"); | |
| 157 // apparently timezone field records number of seconds time differs from UTC, | |
| 158 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
| 159 // timezone offset to UTC, instead, hence sign change. | |
| 160 tz.setRawOffset(timezone * -1000); | |
| 161 Calendar c = Calendar.getInstance(tz, Locale.US); | |
| 162 c.setTime(time); | |
| 163 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
| 164 return sb.toString(); | |
| 165 } | |
| 166 | |
| 167 public Map<String, String> extras() { | |
| 168 return extras; | |
| 169 } | |
| 170 | |
| 171 public String branch() { | |
| 172 return extras.get("branch"); | |
| 173 } | |
| 174 | |
| 175 @Override | |
| 176 public String toString() { | |
| 177 StringBuilder sb = new StringBuilder(); | |
| 178 sb.append("Changeset {"); | |
| 179 sb.append("User: ").append(user).append(", "); | |
| 180 sb.append("Comment: ").append(comment).append(", "); | |
| 181 sb.append("Manifest: ").append(manifest).append(", "); | |
| 182 sb.append("Date: ").append(time).append(", "); | |
| 183 sb.append("Files: ").append(files.size()); | |
| 184 for (String s : files) { | |
| 185 sb.append(", ").append(s); | |
| 186 } | |
| 187 if (extras != null) { | |
| 188 sb.append(", Extra: ").append(extras); | |
| 189 } | |
| 190 sb.append("}"); | |
| 191 return sb.toString(); | |
| 192 } | |
| 193 | |
| 194 @Override | |
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195 public RawChangeset clone() { |
| 153 | 196 try { |
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197 return (RawChangeset) super.clone(); |
| 153 | 198 } catch (CloneNotSupportedException ex) { |
| 199 throw new InternalError(ex.toString()); | |
| 200 } | |
| 201 } | |
| 202 | |
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203 public static RawChangeset parse(DataAccess da) { |
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204 try { |
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205 byte[] data = da.byteArray(); |
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206 RawChangeset rv = new RawChangeset(); |
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207 rv.init(data, 0, data.length); |
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208 return rv; |
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209 } catch (IOException ex) { |
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210 throw new IllegalArgumentException(ex); // FIXME better handling of IOExc |
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211 } |
| 153 | 212 } |
| 213 | |
| 214 /* package-local */void init(byte[] data, int offset, int length) { | |
| 215 final int bufferEndIndex = offset + length; | |
| 216 final byte lineBreak = (byte) '\n'; | |
| 217 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
| 218 if (breakIndex1 == -1) { | |
| 219 throw new IllegalArgumentException("Bad Changeset data"); | |
| 220 } | |
| 221 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
| 222 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
| 223 if (breakIndex2 == -1) { | |
| 224 throw new IllegalArgumentException("Bad Changeset data"); | |
| 225 } | |
| 226 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
| 227 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); | |
| 228 if (breakIndex3 == -1) { | |
| 229 throw new IllegalArgumentException("Bad Changeset data"); | |
| 230 } | |
| 231 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 232 int space1 = _timeString.indexOf(' '); | |
| 233 if (space1 == -1) { | |
| 234 throw new IllegalArgumentException("Bad Changeset data"); | |
| 235 } | |
| 236 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 237 if (space2 == -1) { | |
| 238 space2 = _timeString.length(); | |
| 239 } | |
| 240 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps | |
| 241 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | |
| 242 // XXX not sure need to add timezone here - I can't figure out whether Hg keeps GMT time, and records timezone just for info, or unixTime is taken local | |
| 243 // on commit and timezone is recorded to adjust it to UTC. | |
| 244 Date _time = new Date(unixTime * 1000); | |
| 245 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 246 Map<String, String> _extrasMap; | |
| 247 if (_extras == null) { | |
| 248 _extrasMap = Collections.singletonMap("branch", "default"); | |
| 249 } else { | |
| 250 _extrasMap = new HashMap<String, String>(); | |
| 251 for (String pair : _extras.split("\00")) { | |
| 252 int eq = pair.indexOf(':'); | |
| 253 // FIXME need to decode key/value, @see changelog.py:decodeextra | |
| 254 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 255 } | |
| 256 if (!_extrasMap.containsKey("branch")) { | |
| 257 _extrasMap.put("branch", "default"); | |
| 258 } | |
| 259 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 260 } | |
| 261 | |
| 262 // | |
| 263 int lastStart = breakIndex3 + 1; | |
| 264 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 265 ArrayList<String> _files = null; | |
| 266 if (breakIndex4 > lastStart) { | |
| 267 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 268 _files = new ArrayList<String>(5); | |
| 269 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 270 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 271 lastStart = breakIndex4 + 1; | |
| 272 if (data[breakIndex4 + 1] == lineBreak) { | |
| 273 // found \n\n | |
| 274 break; | |
| 275 } else { | |
| 276 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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277 } |
| 153 | 278 } |
| 279 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
| 280 throw new IllegalArgumentException("Bad Changeset data"); | |
| 281 } | |
| 282 } else { | |
| 283 breakIndex4--; | |
| 284 } | |
| 285 String _comment; | |
| 286 try { | |
| 287 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
| 288 // FIXME respect ui.fallbackencoding and try to decode if set | |
| 289 } catch (UnsupportedEncodingException ex) { | |
| 290 _comment = ""; | |
| 291 throw new IllegalStateException("Could hardly happen"); | |
| 292 } | |
| 293 // change this instance at once, don't leave it partially changes in case of error | |
| 294 this.manifest = _nodeid; | |
| 295 this.user = _user; | |
| 296 this.time = _time; | |
| 297 this.timezone = _timezone; | |
| 298 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 299 this.comment = _comment; | |
| 300 this.extras = _extrasMap; | |
| 301 } | |
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302 |
| 153 | 303 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
| 304 for (int i = startOffset; i < endIndex; i++) { | |
| 305 if (src[i] == what) { | |
| 306 return i; | |
| 307 } | |
| 308 } | |
| 309 return -1; | |
| 310 } | |
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311 } |
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312 |
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313 } |