Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 489:9c0138cda59a
HgRepositoryLock: some javadoc
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Mon, 13 Aug 2012 19:24:29 +0200 |
parents | 31a89587eb04 |
children | 1ee452f31187 |
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1 /* |
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2 * Copyright (c) 2010-2012 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.IterateControlMediator; |
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37 import org.tmatesoft.hg.internal.Lifecycle; |
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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.CancelSupport; |
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41 import org.tmatesoft.hg.util.ProgressSupport; |
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42 |
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43 /** |
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44 * Representation of the Mercurial changelog file (list of ChangeSets) |
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46 * @author Artem Tikhomirov |
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47 * @author TMate Software Ltd. |
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48 */ |
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49 public final class HgChangelog extends Revlog { |
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50 |
153 | 51 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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52 super(hgRepo, content); |
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53 } |
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54 |
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55 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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56 range(0, getLastRevision(), inspector); |
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57 } |
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58 |
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59 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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60 if (inspector == null) { |
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61 throw new IllegalArgumentException(); |
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62 } |
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63 content.iterate(start, end, true, new RawCsetParser(inspector)); |
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64 } |
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65 |
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66 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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67 final RawCsetCollector c = new RawCsetCollector(end - start + 1); |
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68 range(start, end, c); |
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69 return c.result; |
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70 } |
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71 |
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72 /** |
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73 * Access individual revisions. Note, regardless of supplied revision order, inspector gets |
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74 * changesets strictly in the order they are in the changelog. |
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75 * @param inspector callback to get changesets |
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76 * @param revisions revisions to read, unrestricted ordering. |
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77 */ |
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78 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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79 Arrays.sort(revisions); |
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80 rangeInternal(inspector, revisions); |
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81 } |
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82 |
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83 /** |
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84 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted |
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85 */ |
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86 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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87 if (sortedRevisions == null || sortedRevisions.length == 0) { |
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88 return; |
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89 } |
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90 if (inspector == null) { |
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91 throw new IllegalArgumentException(); |
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92 } |
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93 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); |
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94 } |
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95 |
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96 /** |
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97 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog |
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98 * @throws HgInvalidControlFileException if access to revlog index/data entry failed |
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99 */ |
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100 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException { |
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101 int x = getRevisionIndex(nid); |
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102 return range(x, x).get(0); |
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103 } |
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104 |
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105 @Callback |
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106 public interface Inspector { |
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107 /** |
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108 * Access next changeset |
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109 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) |
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110 * |
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111 * @param revisionIndex index of revision being inspected, local to the inspected object |
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112 * @param nodeid revision being inspected |
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113 * @param cset changeset raw data |
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114 */ |
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115 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset); |
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116 } |
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117 |
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118 /** |
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119 * Entry in the Changelog |
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120 */ |
154
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121 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
129
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122 // TODO immutable |
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123 private/* final */Nodeid manifest; |
153 | 124 private String user; |
125 private String comment; | |
126 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
127 private Date time; | |
128 private int timezone; | |
161
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129 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. |
153 | 130 private Map<String, String> extras; |
129
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131 |
153 | 132 /** |
133 * @see mercurial/changelog.py:read() | |
134 * | |
135 * <pre> | |
136 * format used: | |
137 * nodeid\n : manifest node in ascii | |
138 * user\n : user, no \n or \r allowed | |
139 * time tz extra\n : date (time is int or float, timezone is int) | |
140 * : extra is metadatas, encoded and separated by '\0' | |
141 * : older versions ignore it | |
142 * files\n\n : files modified by the cset, no \n or \r allowed | |
143 * (.*) : comment (free text, ideally utf-8) | |
144 * | |
145 * changelog v0 doesn't use extra | |
146 * </pre> | |
147 */ | |
154
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148 private RawChangeset() { |
153 | 149 } |
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150 |
153 | 151 public Nodeid manifest() { |
152 return manifest; | |
153 } | |
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154 |
153 | 155 public String user() { |
156 return user; | |
157 } | |
158 | |
159 public String comment() { | |
160 return comment; | |
161 } | |
162 | |
163 public List<String> files() { | |
164 return files; | |
165 } | |
166 | |
167 public Date date() { | |
168 return time; | |
169 } | |
211
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170 |
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171 /** |
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172 * @return time zone value, as is, positive for Western Hemisphere. |
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173 */ |
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174 public int timezone() { |
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175 return timezone; |
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176 } |
153 | 177 |
178 public String dateString() { | |
179 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
180 StringBuilder sb = new StringBuilder(30); | |
181 Formatter f = new Formatter(sb, Locale.US); | |
211
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182 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); |
153 | 183 // apparently timezone field records number of seconds time differs from UTC, |
184 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
185 // timezone offset to UTC, instead, hence sign change. | |
211
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186 // tz.setRawOffset(timezone * -1000); |
153 | 187 Calendar c = Calendar.getInstance(tz, Locale.US); |
188 c.setTime(time); | |
189 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
190 return sb.toString(); | |
191 } | |
192 | |
193 public Map<String, String> extras() { | |
194 return extras; | |
195 } | |
196 | |
197 public String branch() { | |
198 return extras.get("branch"); | |
199 } | |
200 | |
201 @Override | |
202 public String toString() { | |
203 StringBuilder sb = new StringBuilder(); | |
204 sb.append("Changeset {"); | |
205 sb.append("User: ").append(user).append(", "); | |
206 sb.append("Comment: ").append(comment).append(", "); | |
207 sb.append("Manifest: ").append(manifest).append(", "); | |
208 sb.append("Date: ").append(time).append(", "); | |
209 sb.append("Files: ").append(files.size()); | |
210 for (String s : files) { | |
211 sb.append(", ").append(s); | |
212 } | |
213 if (extras != null) { | |
214 sb.append(", Extra: ").append(extras); | |
215 } | |
216 sb.append("}"); | |
217 return sb.toString(); | |
218 } | |
219 | |
220 @Override | |
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221 public RawChangeset clone() { |
153 | 222 try { |
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223 return (RawChangeset) super.clone(); |
153 | 224 } catch (CloneNotSupportedException ex) { |
225 throw new InternalError(ex.toString()); | |
226 } | |
227 } | |
228 | |
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229 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgInvalidDataFormatException { |
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230 byte[] data = da.byteArray(); |
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231 RawChangeset rv = new RawChangeset(); |
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232 rv.init(data, 0, data.length, null); |
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233 return rv; |
153 | 234 } |
235 | |
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236 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null |
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237 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgInvalidDataFormatException { |
153 | 238 final int bufferEndIndex = offset + length; |
239 final byte lineBreak = (byte) '\n'; | |
240 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
241 if (breakIndex1 == -1) { | |
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242 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 243 } |
244 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
245 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
246 if (breakIndex2 == -1) { | |
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247 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 248 } |
249 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
196
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250 if (usersPool != null) { |
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251 _user = usersPool.unify(_user); |
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252 } |
153 | 253 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); |
254 if (breakIndex3 == -1) { | |
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255 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 256 } |
257 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
258 int space1 = _timeString.indexOf(' '); | |
259 if (space1 == -1) { | |
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260 throw new HgInvalidDataFormatException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3)); |
153 | 261 } |
262 int space2 = _timeString.indexOf(' ', space1 + 1); | |
263 if (space2 == -1) { | |
264 space2 = _timeString.length(); | |
265 } | |
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266 long unixTime = Long.parseLong(_timeString.substring(0, space1)); |
153 | 267 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); |
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268 // unixTime is local time, and timezone records difference of the local time to UTC. |
153 | 269 Date _time = new Date(unixTime * 1000); |
270 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
271 Map<String, String> _extrasMap; | |
252
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272 final String extras_branch_key = "branch"; |
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273 if (_extras == null || _extras.trim().length() == 0) { |
252
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274 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 275 } else { |
276 _extrasMap = new HashMap<String, String>(); | |
277 for (String pair : _extras.split("\00")) { | |
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278 pair = decode(pair); |
153 | 279 int eq = pair.indexOf(':'); |
280 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
281 } | |
252
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282 if (!_extrasMap.containsKey(extras_branch_key)) { |
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283 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 284 } |
285 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
286 } | |
287 | |
288 // | |
289 int lastStart = breakIndex3 + 1; | |
290 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
291 ArrayList<String> _files = null; | |
292 if (breakIndex4 > lastStart) { | |
293 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
294 _files = new ArrayList<String>(5); | |
295 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
296 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
297 lastStart = breakIndex4 + 1; | |
298 if (data[breakIndex4 + 1] == lineBreak) { | |
299 // found \n\n | |
300 break; | |
301 } else { | |
302 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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303 } |
153 | 304 } |
305 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
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306 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 307 } |
308 } else { | |
309 breakIndex4--; | |
310 } | |
311 String _comment; | |
312 try { | |
313 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
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314 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper |
153 | 315 } catch (UnsupportedEncodingException ex) { |
316 _comment = ""; | |
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317 // Could hardly happen |
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318 throw new HgInvalidDataFormatException("Bad Changeset data", ex); |
153 | 319 } |
320 // change this instance at once, don't leave it partially changes in case of error | |
321 this.manifest = _nodeid; | |
322 this.user = _user; | |
323 this.time = _time; | |
324 this.timezone = _timezone; | |
325 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
326 this.comment = _comment; | |
327 this.extras = _extrasMap; | |
328 } | |
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329 |
153 | 330 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
331 for (int i = startOffset; i < endIndex; i++) { | |
332 if (src[i] == what) { | |
333 return i; | |
334 } | |
335 } | |
336 return -1; | |
337 } | |
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338 |
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339 private static String decode(String s) { |
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340 if (s != null && s.indexOf('\\') != -1) { |
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341 // TestAuxUtilities#testChangelogExtrasDecode |
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342 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00"); |
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343 } |
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344 return s; |
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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 (HgInvalidDataFormatException ex) { |
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383 throw ex.setRevisionIndex(revisionNumber); |
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384 } catch (IOException ex) { |
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385 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException) |
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386 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber); |
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387 } |
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388 if (iterateControl != null) { |
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389 iterateControl.checkCancelled(); |
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390 } |
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391 } |
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392 |
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393 public void start(int count, Callback callback, Object token) { |
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394 CancelSupport cs = CancelSupport.Factory.get(inspector, null); |
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395 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback); |
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396 progressHelper.start(count); |
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397 } |
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398 |
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399 public void finish(Object token) { |
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400 progressHelper.done(); |
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401 } |
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402 } |
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403 } |