Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 215:41a778e3fd31
Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
|---|---|
| date | Tue, 17 May 2011 00:56:54 +0200 |
| parents | 644ee58c9f16 |
| children | 883300108179 |
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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.HgBadStateException; |
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34 import org.tmatesoft.hg.core.Nodeid; |
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35 import org.tmatesoft.hg.internal.DataAccess; |
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36 import org.tmatesoft.hg.internal.Pool; |
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37 import org.tmatesoft.hg.internal.RevlogStream; |
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38 |
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39 /** |
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40 * Representation of the Mercurial changelog file (list of ChangeSets) |
| 153 | 41 * |
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42 * @author Artem Tikhomirov |
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43 * @author TMate Software Ltd. |
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44 */ |
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45 public class HgChangelog extends Revlog { |
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46 |
| 153 | 47 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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48 super(hgRepo, content); |
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49 } |
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50 |
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51 public void all(final HgChangelog.Inspector inspector) { |
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52 range(0, getLastRevision(), inspector); |
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53 } |
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54 |
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55 public void range(int start, int end, final HgChangelog.Inspector inspector) { |
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56 if (inspector == null) { |
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57 throw new IllegalArgumentException(); |
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58 } |
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59 content.iterate(start, end, true, new RawCsetParser(inspector)); |
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60 } |
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61 |
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62 public List<RawChangeset> range(int start, int end) { |
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63 final RawCsetCollector c = new RawCsetCollector(end - start + 1); |
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64 range(start, end, c); |
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65 return c.result; |
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66 } |
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67 |
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68 public void range(final HgChangelog.Inspector inspector, final int... revisions) { |
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69 if (revisions == null || revisions.length == 0) { |
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70 return; |
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71 } |
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72 RevlogStream.Inspector i = new RevlogStream.Inspector() { |
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73 private final RawCsetParser delegate = new RawCsetParser(inspector); |
| 153 | 74 |
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75 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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76 if (Arrays.binarySearch(revisions, revisionNumber) >= 0) { |
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77 delegate.next(revisionNumber, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, nodeid, da); |
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78 } |
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79 } |
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80 }; |
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81 Arrays.sort(revisions); |
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82 content.iterate(revisions[0], revisions[revisions.length - 1], true, i); |
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83 } |
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84 |
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85 public interface Inspector { |
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86 // TODO describe whether cset is new instance each time |
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87 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) |
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88 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); |
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89 } |
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90 |
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91 /** |
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92 * Entry in the Changelog |
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93 */ |
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94 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
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95 // TODO immutable |
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96 private/* final */Nodeid manifest; |
| 153 | 97 private String user; |
| 98 private String comment; | |
| 99 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
| 100 private Date time; | |
| 101 private int timezone; | |
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102 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. |
| 153 | 103 private Map<String, String> extras; |
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104 |
| 153 | 105 /** |
| 106 * @see mercurial/changelog.py:read() | |
| 107 * | |
| 108 * <pre> | |
| 109 * format used: | |
| 110 * nodeid\n : manifest node in ascii | |
| 111 * user\n : user, no \n or \r allowed | |
| 112 * time tz extra\n : date (time is int or float, timezone is int) | |
| 113 * : extra is metadatas, encoded and separated by '\0' | |
| 114 * : older versions ignore it | |
| 115 * files\n\n : files modified by the cset, no \n or \r allowed | |
| 116 * (.*) : comment (free text, ideally utf-8) | |
| 117 * | |
| 118 * changelog v0 doesn't use extra | |
| 119 * </pre> | |
| 120 */ | |
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121 private RawChangeset() { |
| 153 | 122 } |
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123 |
| 153 | 124 public Nodeid manifest() { |
| 125 return manifest; | |
| 126 } | |
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127 |
| 153 | 128 public String user() { |
| 129 return user; | |
| 130 } | |
| 131 | |
| 132 public String comment() { | |
| 133 return comment; | |
| 134 } | |
| 135 | |
| 136 public List<String> files() { | |
| 137 return files; | |
| 138 } | |
| 139 | |
| 140 public Date date() { | |
| 141 return time; | |
| 142 } | |
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143 |
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144 /** |
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145 * @return time zone value, as is, positive for Western Hemisphere. |
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146 */ |
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147 public int timezone() { |
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148 return timezone; |
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149 } |
| 153 | 150 |
| 151 public String dateString() { | |
| 152 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
| 153 StringBuilder sb = new StringBuilder(30); | |
| 154 Formatter f = new Formatter(sb, Locale.US); | |
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155 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); |
| 153 | 156 // apparently timezone field records number of seconds time differs from UTC, |
| 157 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
| 158 // timezone offset to UTC, instead, hence sign change. | |
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159 // tz.setRawOffset(timezone * -1000); |
| 153 | 160 Calendar c = Calendar.getInstance(tz, Locale.US); |
| 161 c.setTime(time); | |
| 162 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
| 163 return sb.toString(); | |
| 164 } | |
| 165 | |
| 166 public Map<String, String> extras() { | |
| 167 return extras; | |
| 168 } | |
| 169 | |
| 170 public String branch() { | |
| 171 return extras.get("branch"); | |
| 172 } | |
| 173 | |
| 174 @Override | |
| 175 public String toString() { | |
| 176 StringBuilder sb = new StringBuilder(); | |
| 177 sb.append("Changeset {"); | |
| 178 sb.append("User: ").append(user).append(", "); | |
| 179 sb.append("Comment: ").append(comment).append(", "); | |
| 180 sb.append("Manifest: ").append(manifest).append(", "); | |
| 181 sb.append("Date: ").append(time).append(", "); | |
| 182 sb.append("Files: ").append(files.size()); | |
| 183 for (String s : files) { | |
| 184 sb.append(", ").append(s); | |
| 185 } | |
| 186 if (extras != null) { | |
| 187 sb.append(", Extra: ").append(extras); | |
| 188 } | |
| 189 sb.append("}"); | |
| 190 return sb.toString(); | |
| 191 } | |
| 192 | |
| 193 @Override | |
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194 public RawChangeset clone() { |
| 153 | 195 try { |
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196 return (RawChangeset) super.clone(); |
| 153 | 197 } catch (CloneNotSupportedException ex) { |
| 198 throw new InternalError(ex.toString()); | |
| 199 } | |
| 200 } | |
| 201 | |
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202 public static RawChangeset parse(DataAccess da) { |
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203 try { |
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204 byte[] data = da.byteArray(); |
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205 RawChangeset rv = new RawChangeset(); |
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206 rv.init(data, 0, data.length, null); |
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207 return rv; |
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208 } catch (IOException ex) { |
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209 throw new HgBadStateException(ex); // FIXME "Error reading changeset data" |
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210 } |
| 153 | 211 } |
| 212 | |
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213 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null |
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214 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) { |
| 153 | 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); | |
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227 if (usersPool != null) { |
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228 _user = usersPool.unify(_user); |
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229 } |
| 153 | 230 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); |
| 231 if (breakIndex3 == -1) { | |
| 232 throw new IllegalArgumentException("Bad Changeset data"); | |
| 233 } | |
| 234 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 235 int space1 = _timeString.indexOf(' '); | |
| 236 if (space1 == -1) { | |
| 237 throw new IllegalArgumentException("Bad Changeset data"); | |
| 238 } | |
| 239 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 240 if (space2 == -1) { | |
| 241 space2 = _timeString.length(); | |
| 242 } | |
| 243 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps | |
| 244 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | |
| 245 // 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 | |
| 246 // on commit and timezone is recorded to adjust it to UTC. | |
| 247 Date _time = new Date(unixTime * 1000); | |
| 248 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 249 Map<String, String> _extrasMap; | |
| 250 if (_extras == null) { | |
| 251 _extrasMap = Collections.singletonMap("branch", "default"); | |
| 252 } else { | |
| 253 _extrasMap = new HashMap<String, String>(); | |
| 254 for (String pair : _extras.split("\00")) { | |
| 255 int eq = pair.indexOf(':'); | |
| 256 // FIXME need to decode key/value, @see changelog.py:decodeextra | |
| 257 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 258 } | |
| 259 if (!_extrasMap.containsKey("branch")) { | |
| 260 _extrasMap.put("branch", "default"); | |
| 261 } | |
| 262 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 263 } | |
| 264 | |
| 265 // | |
| 266 int lastStart = breakIndex3 + 1; | |
| 267 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 268 ArrayList<String> _files = null; | |
| 269 if (breakIndex4 > lastStart) { | |
| 270 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 271 _files = new ArrayList<String>(5); | |
| 272 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 273 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 274 lastStart = breakIndex4 + 1; | |
| 275 if (data[breakIndex4 + 1] == lineBreak) { | |
| 276 // found \n\n | |
| 277 break; | |
| 278 } else { | |
| 279 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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280 } |
| 153 | 281 } |
| 282 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
| 283 throw new IllegalArgumentException("Bad Changeset data"); | |
| 284 } | |
| 285 } else { | |
| 286 breakIndex4--; | |
| 287 } | |
| 288 String _comment; | |
| 289 try { | |
| 290 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
| 291 // FIXME respect ui.fallbackencoding and try to decode if set | |
| 292 } catch (UnsupportedEncodingException ex) { | |
| 293 _comment = ""; | |
| 294 throw new IllegalStateException("Could hardly happen"); | |
| 295 } | |
| 296 // change this instance at once, don't leave it partially changes in case of error | |
| 297 this.manifest = _nodeid; | |
| 298 this.user = _user; | |
| 299 this.time = _time; | |
| 300 this.timezone = _timezone; | |
| 301 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 302 this.comment = _comment; | |
| 303 this.extras = _extrasMap; | |
| 304 } | |
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305 |
| 153 | 306 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
| 307 for (int i = startOffset; i < endIndex; i++) { | |
| 308 if (src[i] == what) { | |
| 309 return i; | |
| 310 } | |
| 311 } | |
| 312 return -1; | |
| 313 } | |
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314 } |
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315 |
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316 private static class RawCsetCollector implements Inspector { |
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317 final ArrayList<RawChangeset> result; |
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318 |
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319 public RawCsetCollector(int count) { |
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320 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); |
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321 } |
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322 |
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323 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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324 result.add(cset.clone()); |
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325 } |
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326 } |
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327 |
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328 private static class RawCsetParser implements RevlogStream.Inspector { |
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329 |
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330 private final Inspector inspector; |
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331 private final Pool<String> usersPool; |
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332 private final RawChangeset cset = new RawChangeset(); |
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333 |
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334 public RawCsetParser(HgChangelog.Inspector delegate) { |
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335 assert delegate != null; |
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336 inspector = delegate; |
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337 usersPool = new Pool<String>(); |
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338 } |
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339 |
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340 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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341 try { |
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342 byte[] data = da.byteArray(); |
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343 cset.init(data, 0, data.length, usersPool); |
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344 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse |
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345 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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346 } catch (Exception ex) { |
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347 throw new HgBadStateException(ex); // FIXME exception handling |
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348 } |
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349 } |
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350 } |
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351 } |