Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 608:e1b29756f901
Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 07 May 2013 21:27:51 +0200 |
parents | 46f29b73e51e |
children | 6526d8adbc0f |
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1 /* |
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2 * Copyright (c) 2010-2013 TMate Software Ltd |
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3 * |
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4 * This program is free software; you can redistribute it and/or modify |
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5 * it under the terms of the GNU General Public License as published by |
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6 * the Free Software Foundation; version 2 of the License. |
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7 * |
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8 * This program is distributed in the hope that it will be useful, |
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 * GNU General Public License for more details. |
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12 * |
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13 * For information on how to redistribute this software under |
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14 * the terms of a license other than GNU General Public License |
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15 * contact TMate Software at support@hg4j.com |
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16 */ |
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17 package org.tmatesoft.hg.repo; |
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18 |
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19 import java.io.IOException; |
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20 import java.io.UnsupportedEncodingException; |
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21 import java.util.ArrayList; |
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22 import java.util.Arrays; |
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23 import java.util.Calendar; |
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24 import java.util.Collections; |
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25 import java.util.Date; |
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26 import java.util.Formatter; |
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27 import java.util.HashMap; |
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28 import java.util.List; |
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29 import java.util.Locale; |
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30 import java.util.Map; |
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31 import java.util.TimeZone; |
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32 |
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33 import org.tmatesoft.hg.core.Nodeid; |
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34 import org.tmatesoft.hg.internal.Callback; |
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35 import org.tmatesoft.hg.internal.DataAccess; |
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36 import org.tmatesoft.hg.internal.Lifecycle; |
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37 import org.tmatesoft.hg.internal.LifecycleBridge; |
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38 import org.tmatesoft.hg.internal.Pool; |
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39 import org.tmatesoft.hg.internal.RevlogStream; |
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40 import org.tmatesoft.hg.util.Adaptable; |
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41 import org.tmatesoft.hg.util.CancelSupport; |
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42 import org.tmatesoft.hg.util.ProgressSupport; |
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43 |
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44 /** |
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45 * Representation of the Mercurial changelog file (list of ChangeSets) |
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47 * @author Artem Tikhomirov |
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48 * @author TMate Software Ltd. |
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49 */ |
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50 public final class HgChangelog extends Revlog { |
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51 |
153 | 52 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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53 super(hgRepo, content, true); |
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54 } |
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55 |
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56 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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57 range(0, getLastRevision(), inspector); |
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58 } |
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59 |
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60 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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61 if (inspector == null) { |
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62 throw new IllegalArgumentException(); |
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63 } |
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64 content.iterate(start, end, true, new RawCsetParser(inspector)); |
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65 } |
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66 |
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67 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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68 final RawCsetCollector c = new RawCsetCollector(end - start + 1); |
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69 range(start, end, c); |
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70 return c.result; |
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71 } |
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72 |
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73 /** |
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74 * Access individual revisions. Note, regardless of supplied revision order, inspector gets |
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75 * changesets strictly in the order they are in the changelog. |
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76 * @param inspector callback to get changesets |
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77 * @param revisions revisions to read, unrestricted ordering. |
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78 */ |
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79 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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80 Arrays.sort(revisions); |
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81 rangeInternal(inspector, revisions); |
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82 } |
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83 |
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84 /** |
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85 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted |
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86 */ |
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87 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException { |
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88 if (sortedRevisions == null || sortedRevisions.length == 0) { |
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89 return; |
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90 } |
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91 if (inspector == null) { |
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92 throw new IllegalArgumentException(); |
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93 } |
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94 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); |
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95 } |
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96 |
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97 /** |
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98 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog |
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99 * @throws HgInvalidControlFileException if access to revlog index/data entry failed |
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100 */ |
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101 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException { |
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102 int x = getRevisionIndex(nid); |
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103 return range(x, x).get(0); |
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104 } |
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105 |
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106 @Callback |
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107 public interface Inspector { |
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108 /** |
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109 * Access next changeset |
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110 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) |
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111 * |
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112 * @param revisionIndex index of revision being inspected, local to the inspected object |
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113 * @param nodeid revision being inspected |
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114 * @param cset changeset raw data |
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115 */ |
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116 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset); |
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117 } |
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118 |
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119 /** |
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120 * Entry in the Changelog |
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121 */ |
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122 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
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123 // TODO immutable |
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124 private/* final */Nodeid manifest; |
153 | 125 private String user; |
126 private String comment; | |
127 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
128 private Date time; | |
129 private int timezone; | |
161
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130 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. |
153 | 131 private Map<String, String> extras; |
129
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132 |
153 | 133 /** |
134 * @see mercurial/changelog.py:read() | |
135 * | |
136 * <pre> | |
137 * format used: | |
138 * nodeid\n : manifest node in ascii | |
139 * user\n : user, no \n or \r allowed | |
140 * time tz extra\n : date (time is int or float, timezone is int) | |
141 * : extra is metadatas, encoded and separated by '\0' | |
142 * : older versions ignore it | |
143 * files\n\n : files modified by the cset, no \n or \r allowed | |
144 * (.*) : comment (free text, ideally utf-8) | |
145 * | |
146 * changelog v0 doesn't use extra | |
147 * </pre> | |
148 */ | |
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149 private RawChangeset() { |
153 | 150 } |
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151 |
153 | 152 public Nodeid manifest() { |
153 return manifest; | |
154 } | |
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155 |
153 | 156 public String user() { |
157 return user; | |
158 } | |
159 | |
160 public String comment() { | |
161 return comment; | |
162 } | |
163 | |
164 public List<String> files() { | |
165 return files; | |
166 } | |
167 | |
168 public Date date() { | |
169 return time; | |
170 } | |
211
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171 |
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172 /** |
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173 * @return time zone value, as is, positive for Western Hemisphere. |
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174 */ |
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175 public int timezone() { |
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176 return timezone; |
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177 } |
153 | 178 |
179 public String dateString() { | |
180 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
181 StringBuilder sb = new StringBuilder(30); | |
182 Formatter f = new Formatter(sb, Locale.US); | |
211
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183 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); |
153 | 184 // apparently timezone field records number of seconds time differs from UTC, |
185 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
186 // timezone offset to UTC, instead, hence sign change. | |
211
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187 // tz.setRawOffset(timezone * -1000); |
153 | 188 Calendar c = Calendar.getInstance(tz, Locale.US); |
189 c.setTime(time); | |
190 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
191 return sb.toString(); | |
192 } | |
193 | |
194 public Map<String, String> extras() { | |
195 return extras; | |
196 } | |
197 | |
198 public String branch() { | |
199 return extras.get("branch"); | |
200 } | |
201 | |
202 @Override | |
203 public String toString() { | |
204 StringBuilder sb = new StringBuilder(); | |
205 sb.append("Changeset {"); | |
206 sb.append("User: ").append(user).append(", "); | |
207 sb.append("Comment: ").append(comment).append(", "); | |
208 sb.append("Manifest: ").append(manifest).append(", "); | |
209 sb.append("Date: ").append(time).append(", "); | |
210 sb.append("Files: ").append(files.size()); | |
211 for (String s : files) { | |
212 sb.append(", ").append(s); | |
213 } | |
214 if (extras != null) { | |
215 sb.append(", Extra: ").append(extras); | |
216 } | |
217 sb.append("}"); | |
218 return sb.toString(); | |
219 } | |
220 | |
221 @Override | |
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222 public RawChangeset clone() { |
153 | 223 try { |
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224 return (RawChangeset) super.clone(); |
153 | 225 } catch (CloneNotSupportedException ex) { |
226 throw new InternalError(ex.toString()); | |
227 } | |
228 } | |
229 | |
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230 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgInvalidDataFormatException { |
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231 byte[] data = da.byteArray(); |
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232 RawChangeset rv = new RawChangeset(); |
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233 rv.init(data, 0, data.length, null); |
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234 return rv; |
153 | 235 } |
236 | |
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237 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null |
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238 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgInvalidDataFormatException { |
153 | 239 final int bufferEndIndex = offset + length; |
240 final byte lineBreak = (byte) '\n'; | |
241 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
242 if (breakIndex1 == -1) { | |
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243 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 244 } |
245 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
246 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
247 if (breakIndex2 == -1) { | |
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248 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 249 } |
589
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250 String _user; |
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251 try { |
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252 // TODO use encoding helper? Although where encoding is fixed (like here), seems to be just too much |
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253 _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1, "UTF-8"); |
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254 if (usersPool != null) { |
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255 _user = usersPool.unify(_user); |
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256 } |
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257 } catch (UnsupportedEncodingException ex) { |
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258 _user = ""; |
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259 // Could hardly happen |
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260 throw new HgInvalidDataFormatException("Bad Changeset data", ex); |
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261 } |
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262 |
153 | 263 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); |
264 if (breakIndex3 == -1) { | |
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265 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 266 } |
267 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
268 int space1 = _timeString.indexOf(' '); | |
269 if (space1 == -1) { | |
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270 throw new HgInvalidDataFormatException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3)); |
153 | 271 } |
272 int space2 = _timeString.indexOf(' ', space1 + 1); | |
273 if (space2 == -1) { | |
274 space2 = _timeString.length(); | |
275 } | |
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276 long unixTime = Long.parseLong(_timeString.substring(0, space1)); |
153 | 277 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); |
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278 // unixTime is local time, and timezone records difference of the local time to UTC. |
153 | 279 Date _time = new Date(unixTime * 1000); |
280 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
281 Map<String, String> _extrasMap; | |
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282 final String extras_branch_key = "branch"; |
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283 if (_extras == null || _extras.trim().length() == 0) { |
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284 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 285 } else { |
286 _extrasMap = new HashMap<String, String>(); | |
287 for (String pair : _extras.split("\00")) { | |
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288 pair = decode(pair); |
153 | 289 int eq = pair.indexOf(':'); |
290 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
291 } | |
252
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292 if (!_extrasMap.containsKey(extras_branch_key)) { |
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293 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 294 } |
295 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
296 } | |
297 | |
298 // | |
299 int lastStart = breakIndex3 + 1; | |
300 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
301 ArrayList<String> _files = null; | |
302 if (breakIndex4 > lastStart) { | |
303 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
304 _files = new ArrayList<String>(5); | |
305 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
306 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
307 lastStart = breakIndex4 + 1; | |
308 if (data[breakIndex4 + 1] == lineBreak) { | |
309 // found \n\n | |
310 break; | |
311 } else { | |
312 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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313 } |
153 | 314 } |
315 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
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316 throw new HgInvalidDataFormatException("Bad Changeset data"); |
153 | 317 } |
318 } else { | |
319 breakIndex4--; | |
320 } | |
321 String _comment; | |
322 try { | |
323 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
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324 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper |
153 | 325 } catch (UnsupportedEncodingException ex) { |
326 _comment = ""; | |
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327 // Could hardly happen |
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328 throw new HgInvalidDataFormatException("Bad Changeset data", ex); |
153 | 329 } |
330 // change this instance at once, don't leave it partially changes in case of error | |
331 this.manifest = _nodeid; | |
332 this.user = _user; | |
333 this.time = _time; | |
334 this.timezone = _timezone; | |
335 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
336 this.comment = _comment; | |
337 this.extras = _extrasMap; | |
338 } | |
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339 |
153 | 340 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
341 for (int i = startOffset; i < endIndex; i++) { | |
342 if (src[i] == what) { | |
343 return i; | |
344 } | |
345 } | |
346 return -1; | |
347 } | |
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348 |
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349 private static String decode(String s) { |
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350 if (s != null && s.indexOf('\\') != -1) { |
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351 // TestAuxUtilities#testChangelogExtrasDecode |
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352 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00"); |
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353 } |
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354 return s; |
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355 } |
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356 } |
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357 |
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358 private static class RawCsetCollector implements Inspector { |
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359 final ArrayList<RawChangeset> result; |
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360 |
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361 public RawCsetCollector(int count) { |
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362 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); |
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363 } |
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364 |
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365 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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366 result.add(cset.clone()); |
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367 } |
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368 } |
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369 |
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370 private static class RawCsetParser implements RevlogStream.Inspector, Adaptable { |
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371 |
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372 private final Inspector inspector; |
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373 private final Pool<String> usersPool; |
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374 private final RawChangeset cset = new RawChangeset(); |
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375 // non-null when inspector uses high-level lifecycle entities (progress and/or cancel supports) |
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376 private final LifecycleBridge lifecycleStub; |
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377 // non-null when inspector relies on low-level lifecycle and is responsible |
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378 // to proceed any possible high-level entities himself. |
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379 private final Lifecycle inspectorLifecycle; |
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380 |
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381 public RawCsetParser(HgChangelog.Inspector delegate) { |
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382 assert delegate != null; |
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383 inspector = delegate; |
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384 usersPool = new Pool<String>(); |
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385 inspectorLifecycle = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null); |
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386 if (inspectorLifecycle == null) { |
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387 ProgressSupport ph = Adaptable.Factory.getAdapter(delegate, ProgressSupport.class, null); |
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388 CancelSupport cs = Adaptable.Factory.getAdapter(delegate, CancelSupport.class, null); |
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389 if (cs != null || ph != null) { |
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390 lifecycleStub = new LifecycleBridge(ph, cs); |
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391 } else { |
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392 lifecycleStub = null; |
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393 } |
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394 } else { |
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395 lifecycleStub = null; |
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396 } |
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397 } |
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398 |
423
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399 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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400 try { |
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401 byte[] data = da.byteArray(); |
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402 cset.init(data, 0, data.length, usersPool); |
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403 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse |
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404 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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405 if (lifecycleStub != null) { |
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406 lifecycleStub.nextStep(); |
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407 } |
427
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408 } catch (HgInvalidDataFormatException ex) { |
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409 throw ex.setRevisionIndex(revisionNumber); |
366
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410 } catch (IOException ex) { |
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411 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException) |
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412 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber); |
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413 } |
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414 } |
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415 |
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416 public <T> T getAdapter(Class<T> adapterClass) { |
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417 if (adapterClass == Lifecycle.class) { |
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418 if (inspectorLifecycle != null) { |
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419 return adapterClass.cast(inspectorLifecycle); |
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420 } |
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421 // reveal interest in lifecycle only when either progress or cancel support is there |
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422 // and inspector itself doesn't respond to lifecycle request |
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423 // lifecycleStub may still be null here (no progress and cancel), it's ok to cast(null) |
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424 return adapterClass.cast(lifecycleStub); |
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425 |
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426 } |
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427 return Adaptable.Factory.getAdapter(inspector, adapterClass, null); |
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428 } |
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429 |
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430 } |
0
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431 } |