Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 317:09628675bcee
Rework file history build approach to match rest of the API
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
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| date | Thu, 29 Sep 2011 03:20:28 +0200 | 
| parents | f9f3e9b67ccc | 
| children | a674b8590362 | 
| rev | line source | 
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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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102
 
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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.Collection; | 
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25 import java.util.Collections; | 
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26 import java.util.Date; | 
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27 import java.util.Formatter; | 
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28 import java.util.HashMap; | 
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29 import java.util.List; | 
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30 import java.util.Locale; | 
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31 import java.util.Map; | 
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32 import java.util.TimeZone; | 
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33 | 
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34 import org.tmatesoft.hg.core.HgBadStateException; | 
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35 import org.tmatesoft.hg.core.Nodeid; | 
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36 import org.tmatesoft.hg.internal.DataAccess; | 
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37 import org.tmatesoft.hg.internal.IterateControlMediator; | 
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38 import org.tmatesoft.hg.internal.Lifecycle; | 
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39 import org.tmatesoft.hg.internal.Pool; | 
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40 import org.tmatesoft.hg.internal.RevlogStream; | 
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41 import org.tmatesoft.hg.util.CancelSupport; | 
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42 import org.tmatesoft.hg.util.Pair; | 
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43 import org.tmatesoft.hg.util.ProgressSupport; | 
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44 | 
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45 /** | 
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46 * Representation of the Mercurial changelog file (list of ChangeSets) | 
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48 * @author Artem Tikhomirov | 
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49 * @author TMate Software Ltd. | 
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50 */ | 
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Changelog to HgChangelog
 
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51 public class HgChangelog extends Revlog { | 
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52 | 
| 153 | 53 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { | 
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54 super(hgRepo, content); | 
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55 } | 
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56 | 
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57 public void all(final HgChangelog.Inspector inspector) { | 
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58 range(0, getLastRevision(), inspector); | 
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59 } | 
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60 | 
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61 public void range(int start, int end, final HgChangelog.Inspector inspector) { | 
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62 if (inspector == null) { | 
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63 throw new IllegalArgumentException(); | 
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64 } | 
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65 content.iterate(start, end, true, new RawCsetParser(inspector)); | 
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66 } | 
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67 | 
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68 public List<RawChangeset> range(int start, int end) { | 
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69 final RawCsetCollector c = new RawCsetCollector(end - start + 1); | 
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70 range(start, end, c); | 
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71 return c.result; | 
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72 } | 
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73 | 
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74 /** | 
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75 * Access individual revisions. Note, regardless of supplied revision order, inspector gets | 
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76 * changesets strictly in the order they are in the changelog. | 
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77 * @param inspector callback to get changesets | 
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78 * @param revisions revisions to read, unrestricted ordering. | 
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79 */ | 
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80 public void range(final HgChangelog.Inspector inspector, final int... revisions) { | 
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81 Arrays.sort(revisions); | 
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82 rangeInternal(inspector, revisions); | 
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83 } | 
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84 | 
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85 /** | 
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86 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted | 
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87 */ | 
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88 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) { | 
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89 if (sortedRevisions == null || sortedRevisions.length == 0) { | 
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90 return; | 
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91 } | 
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92 if (inspector == null) { | 
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93 throw new IllegalArgumentException(); | 
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94 } | 
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95 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); | 
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96 } | 
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97 | 
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98 public RawChangeset changeset(Nodeid nid) { | 
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99 int x = getLocalRevision(nid); | 
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100 return range(x, x).get(0); | 
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101 } | 
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102 | 
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103 public interface Inspector { | 
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104 // TODO describe whether cset is new instance each time | 
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105 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) | 
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106 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); | 
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107 } | 
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108 | 
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109 /** | 
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110 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according | 
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111 * to parent information of the revlog this inspector visits. | 
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112 * @see HgDataFile#history(TreeInspector) | 
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113 */ | 
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114 public interface TreeInspector { | 
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115 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can | 
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116 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to, | 
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117 // but changeset revisions always. | 
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118 // TODO HgChangelog.walk(TreeInspector) | 
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119 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets); | 
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120 } | 
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121 | 
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122 /** | 
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123 * Entry in the Changelog | 
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124 */ | 
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125 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ | 
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126 // TODO immutable | 
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127 private/* final */Nodeid manifest; | 
| 153 | 128 private String user; | 
| 129 private String comment; | |
| 130 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
| 131 private Date time; | |
| 132 private int timezone; | |
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133 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. | 
| 153 | 134 private Map<String, String> extras; | 
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135 | 
| 153 | 136 /** | 
| 137 * @see mercurial/changelog.py:read() | |
| 138 * | |
| 139 * <pre> | |
| 140 * format used: | |
| 141 * nodeid\n : manifest node in ascii | |
| 142 * user\n : user, no \n or \r allowed | |
| 143 * time tz extra\n : date (time is int or float, timezone is int) | |
| 144 * : extra is metadatas, encoded and separated by '\0' | |
| 145 * : older versions ignore it | |
| 146 * files\n\n : files modified by the cset, no \n or \r allowed | |
| 147 * (.*) : comment (free text, ideally utf-8) | |
| 148 * | |
| 149 * changelog v0 doesn't use extra | |
| 150 * </pre> | |
| 151 */ | |
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152 private RawChangeset() { | 
| 153 | 153 } | 
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154 | 
| 153 | 155 public Nodeid manifest() { | 
| 156 return manifest; | |
| 157 } | |
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158 | 
| 153 | 159 public String user() { | 
| 160 return user; | |
| 161 } | |
| 162 | |
| 163 public String comment() { | |
| 164 return comment; | |
| 165 } | |
| 166 | |
| 167 public List<String> files() { | |
| 168 return files; | |
| 169 } | |
| 170 | |
| 171 public Date date() { | |
| 172 return time; | |
| 173 } | |
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174 | 
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175 /** | 
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176 * @return time zone value, as is, positive for Western Hemisphere. | 
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177 */ | 
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178 public int timezone() { | 
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179 return timezone; | 
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180 } | 
| 153 | 181 | 
| 182 public String dateString() { | |
| 183 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
| 184 StringBuilder sb = new StringBuilder(30); | |
| 185 Formatter f = new Formatter(sb, Locale.US); | |
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186 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); | 
| 153 | 187 // apparently timezone field records number of seconds time differs from UTC, | 
| 188 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
| 189 // timezone offset to UTC, instead, hence sign change. | |
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190 // tz.setRawOffset(timezone * -1000); | 
| 153 | 191 Calendar c = Calendar.getInstance(tz, Locale.US); | 
| 192 c.setTime(time); | |
| 193 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
| 194 return sb.toString(); | |
| 195 } | |
| 196 | |
| 197 public Map<String, String> extras() { | |
| 198 return extras; | |
| 199 } | |
| 200 | |
| 201 public String branch() { | |
| 202 return extras.get("branch"); | |
| 203 } | |
| 204 | |
| 205 @Override | |
| 206 public String toString() { | |
| 207 StringBuilder sb = new StringBuilder(); | |
| 208 sb.append("Changeset {"); | |
| 209 sb.append("User: ").append(user).append(", "); | |
| 210 sb.append("Comment: ").append(comment).append(", "); | |
| 211 sb.append("Manifest: ").append(manifest).append(", "); | |
| 212 sb.append("Date: ").append(time).append(", "); | |
| 213 sb.append("Files: ").append(files.size()); | |
| 214 for (String s : files) { | |
| 215 sb.append(", ").append(s); | |
| 216 } | |
| 217 if (extras != null) { | |
| 218 sb.append(", Extra: ").append(extras); | |
| 219 } | |
| 220 sb.append("}"); | |
| 221 return sb.toString(); | |
| 222 } | |
| 223 | |
| 224 @Override | |
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225 public RawChangeset clone() { | 
| 153 | 226 try { | 
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227 return (RawChangeset) super.clone(); | 
| 153 | 228 } catch (CloneNotSupportedException ex) { | 
| 229 throw new InternalError(ex.toString()); | |
| 230 } | |
| 231 } | |
| 232 | |
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233 public static RawChangeset parse(DataAccess da) { | 
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234 try { | 
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235 byte[] data = da.byteArray(); | 
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236 RawChangeset rv = new RawChangeset(); | 
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237 rv.init(data, 0, data.length, null); | 
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238 return rv; | 
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239 } catch (IOException ex) { | 
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240 throw new HgBadStateException(ex); // FIXME "Error reading changeset data" | 
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241 } | 
| 153 | 242 } | 
| 243 | |
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244 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null | 
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245 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) { | 
| 153 | 246 final int bufferEndIndex = offset + length; | 
| 247 final byte lineBreak = (byte) '\n'; | |
| 248 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
| 249 if (breakIndex1 == -1) { | |
| 250 throw new IllegalArgumentException("Bad Changeset data"); | |
| 251 } | |
| 252 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
| 253 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
| 254 if (breakIndex2 == -1) { | |
| 255 throw new IllegalArgumentException("Bad Changeset data"); | |
| 256 } | |
| 257 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
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258 if (usersPool != null) { | 
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259 _user = usersPool.unify(_user); | 
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260 } | 
| 153 | 261 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); | 
| 262 if (breakIndex3 == -1) { | |
| 263 throw new IllegalArgumentException("Bad Changeset data"); | |
| 264 } | |
| 265 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 266 int space1 = _timeString.indexOf(' '); | |
| 267 if (space1 == -1) { | |
| 268 throw new IllegalArgumentException("Bad Changeset data"); | |
| 269 } | |
| 270 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 271 if (space2 == -1) { | |
| 272 space2 = _timeString.length(); | |
| 273 } | |
| 274 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps | |
| 275 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | |
| 276 // 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 | |
| 277 // on commit and timezone is recorded to adjust it to UTC. | |
| 278 Date _time = new Date(unixTime * 1000); | |
| 279 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 280 Map<String, String> _extrasMap; | |
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281 final String extras_branch_key = "branch"; | 
| 153 | 282 if (_extras == null) { | 
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283 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 284 } else { | 
| 285 _extrasMap = new HashMap<String, String>(); | |
| 286 for (String pair : _extras.split("\00")) { | |
| 287 int eq = pair.indexOf(':'); | |
| 288 // FIXME need to decode key/value, @see changelog.py:decodeextra | |
| 289 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 290 } | |
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291 if (!_extrasMap.containsKey(extras_branch_key)) { | 
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292 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 293 } | 
| 294 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 295 } | |
| 296 | |
| 297 // | |
| 298 int lastStart = breakIndex3 + 1; | |
| 299 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 300 ArrayList<String> _files = null; | |
| 301 if (breakIndex4 > lastStart) { | |
| 302 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 303 _files = new ArrayList<String>(5); | |
| 304 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 305 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 306 lastStart = breakIndex4 + 1; | |
| 307 if (data[breakIndex4 + 1] == lineBreak) { | |
| 308 // found \n\n | |
| 309 break; | |
| 310 } else { | |
| 311 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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312 } | 
| 153 | 313 } | 
| 314 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
| 315 throw new IllegalArgumentException("Bad Changeset data"); | |
| 316 } | |
| 317 } else { | |
| 318 breakIndex4--; | |
| 319 } | |
| 320 String _comment; | |
| 321 try { | |
| 322 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
| 323 // FIXME respect ui.fallbackencoding and try to decode if set | |
| 324 } catch (UnsupportedEncodingException ex) { | |
| 325 _comment = ""; | |
| 326 throw new IllegalStateException("Could hardly happen"); | |
| 327 } | |
| 328 // change this instance at once, don't leave it partially changes in case of error | |
| 329 this.manifest = _nodeid; | |
| 330 this.user = _user; | |
| 331 this.time = _time; | |
| 332 this.timezone = _timezone; | |
| 333 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 334 this.comment = _comment; | |
| 335 this.extras = _extrasMap; | |
| 336 } | |
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337 | 
| 153 | 338 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { | 
| 339 for (int i = startOffset; i < endIndex; i++) { | |
| 340 if (src[i] == what) { | |
| 341 return i; | |
| 342 } | |
| 343 } | |
| 344 return -1; | |
| 345 } | |
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346 } | 
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347 | 
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348 private static class RawCsetCollector implements Inspector { | 
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349 final ArrayList<RawChangeset> result; | 
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350 | 
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351 public RawCsetCollector(int count) { | 
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352 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); | 
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353 } | 
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354 | 
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355 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { | 
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356 result.add(cset.clone()); | 
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357 } | 
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358 } | 
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359 | 
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360 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle { | 
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361 | 
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362 private final Inspector inspector; | 
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363 private final Pool<String> usersPool; | 
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364 private final RawChangeset cset = new RawChangeset(); | 
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365 private final ProgressSupport progressHelper; | 
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366 private IterateControlMediator iterateControl; | 
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367 | 
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368 public RawCsetParser(HgChangelog.Inspector delegate) { | 
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369 assert delegate != null; | 
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370 inspector = delegate; | 
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371 usersPool = new Pool<String>(); | 
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372 progressHelper = ProgressSupport.Factory.get(delegate); | 
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373 } | 
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374 | 
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375 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { | 
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376 try { | 
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377 byte[] data = da.byteArray(); | 
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378 cset.init(data, 0, data.length, usersPool); | 
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379 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse | 
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380 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); | 
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381 progressHelper.worked(1); | 
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382 } catch (Exception ex) { | 
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383 throw new HgBadStateException(ex); // FIXME exception handling | 
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384 } | 
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385 if (iterateControl != null) { | 
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386 iterateControl.checkCancelled(); | 
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387 } | 
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388 } | 
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389 | 
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390 public void start(int count, Callback callback, Object token) { | 
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391 CancelSupport cs = CancelSupport.Factory.get(inspector, null); | 
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392 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback); | 
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393 progressHelper.start(count); | 
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394 } | 
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395 | 
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396 public void finish(Object token) { | 
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397 progressHelper.done(); | 
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398 } | 
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399 } | 
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0
 
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400 } | 
