Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 356:91d75e1bac9f
Consistent approach to deal with adaptable objects. Give adaptable precedence over instanceof to allow conditional response when classes do implement desired interface
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 06 Dec 2011 14:25:52 +0100 |
parents | 5f9073eabf06 |
children | 150500515714 |
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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.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.HgInvalidControlFileException; |
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36 import org.tmatesoft.hg.core.HgInvalidRevisionException; |
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37 import org.tmatesoft.hg.core.Nodeid; |
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38 import org.tmatesoft.hg.internal.DataAccess; |
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39 import org.tmatesoft.hg.internal.IterateControlMediator; |
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40 import org.tmatesoft.hg.internal.Lifecycle; |
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41 import org.tmatesoft.hg.internal.Pool; |
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42 import org.tmatesoft.hg.internal.RevlogStream; |
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43 import org.tmatesoft.hg.util.CancelSupport; |
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44 import org.tmatesoft.hg.util.Pair; |
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45 import org.tmatesoft.hg.util.ProgressSupport; |
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46 |
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47 /** |
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48 * Representation of the Mercurial changelog file (list of ChangeSets) |
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50 * @author Artem Tikhomirov |
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51 * @author TMate Software Ltd. |
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52 */ |
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53 public class HgChangelog extends Revlog { |
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54 |
153 | 55 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { |
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56 super(hgRepo, content); |
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57 } |
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58 |
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59 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException { |
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60 range(0, getLastRevision(), inspector); |
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61 } |
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62 |
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63 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException { |
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64 if (inspector == null) { |
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65 throw new IllegalArgumentException(); |
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66 } |
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67 content.iterate(start, end, true, new RawCsetParser(inspector)); |
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68 } |
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69 |
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70 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException { |
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71 final RawCsetCollector c = new RawCsetCollector(end - start + 1); |
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72 range(start, end, c); |
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73 return c.result; |
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74 } |
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75 |
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76 /** |
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77 * Access individual revisions. Note, regardless of supplied revision order, inspector gets |
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78 * changesets strictly in the order they are in the changelog. |
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79 * @param inspector callback to get changesets |
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80 * @param revisions revisions to read, unrestricted ordering. |
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81 */ |
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82 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException { |
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83 Arrays.sort(revisions); |
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84 rangeInternal(inspector, revisions); |
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85 } |
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86 |
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87 /** |
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88 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted |
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89 */ |
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90 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException { |
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91 if (sortedRevisions == null || sortedRevisions.length == 0) { |
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92 return; |
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93 } |
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94 if (inspector == null) { |
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95 throw new IllegalArgumentException(); |
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96 } |
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97 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); |
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98 } |
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99 |
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100 /** |
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101 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog |
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102 * @throws HgInvalidControlFileException if access to revlog index/data entry failed |
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103 */ |
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104 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException { |
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105 int x = getLocalRevision(nid); |
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106 return range(x, x).get(0); |
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107 } |
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108 |
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109 public interface Inspector { |
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110 // TODO describe whether cset is new instance each time |
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111 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) |
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112 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); |
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113 } |
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114 |
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115 /** |
317
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116 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according |
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117 * to parent information of the revlog this inspector visits. |
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118 * @see HgDataFile#history(TreeInspector) |
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119 * @deprecated use {@link HgChangesetTreeHandler} and HgLogCommand#execute(HgChangesetTreeHandler)} |
317
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120 */ |
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121 @Deprecated |
317
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122 public interface TreeInspector { |
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123 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can |
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124 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to, |
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125 // but changeset revisions always. |
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126 // TODO HgChangelog.walk(TreeInspector) |
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127 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets); |
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128 } |
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129 |
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130 /** |
129
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131 * Entry in the Changelog |
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132 */ |
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133 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ |
129
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134 // TODO immutable |
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135 private/* final */Nodeid manifest; |
153 | 136 private String user; |
137 private String comment; | |
138 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
139 private Date time; | |
140 private int timezone; | |
161
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141 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. |
153 | 142 private Map<String, String> extras; |
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143 |
153 | 144 /** |
145 * @see mercurial/changelog.py:read() | |
146 * | |
147 * <pre> | |
148 * format used: | |
149 * nodeid\n : manifest node in ascii | |
150 * user\n : user, no \n or \r allowed | |
151 * time tz extra\n : date (time is int or float, timezone is int) | |
152 * : extra is metadatas, encoded and separated by '\0' | |
153 * : older versions ignore it | |
154 * files\n\n : files modified by the cset, no \n or \r allowed | |
155 * (.*) : comment (free text, ideally utf-8) | |
156 * | |
157 * changelog v0 doesn't use extra | |
158 * </pre> | |
159 */ | |
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160 private RawChangeset() { |
153 | 161 } |
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162 |
153 | 163 public Nodeid manifest() { |
164 return manifest; | |
165 } | |
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166 |
153 | 167 public String user() { |
168 return user; | |
169 } | |
170 | |
171 public String comment() { | |
172 return comment; | |
173 } | |
174 | |
175 public List<String> files() { | |
176 return files; | |
177 } | |
178 | |
179 public Date date() { | |
180 return time; | |
181 } | |
211
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182 |
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183 /** |
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184 * @return time zone value, as is, positive for Western Hemisphere. |
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185 */ |
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186 public int timezone() { |
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187 return timezone; |
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188 } |
153 | 189 |
190 public String dateString() { | |
191 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
192 StringBuilder sb = new StringBuilder(30); | |
193 Formatter f = new Formatter(sb, Locale.US); | |
211
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194 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); |
153 | 195 // apparently timezone field records number of seconds time differs from UTC, |
196 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
197 // timezone offset to UTC, instead, hence sign change. | |
211
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198 // tz.setRawOffset(timezone * -1000); |
153 | 199 Calendar c = Calendar.getInstance(tz, Locale.US); |
200 c.setTime(time); | |
201 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
202 return sb.toString(); | |
203 } | |
204 | |
205 public Map<String, String> extras() { | |
206 return extras; | |
207 } | |
208 | |
209 public String branch() { | |
210 return extras.get("branch"); | |
211 } | |
212 | |
213 @Override | |
214 public String toString() { | |
215 StringBuilder sb = new StringBuilder(); | |
216 sb.append("Changeset {"); | |
217 sb.append("User: ").append(user).append(", "); | |
218 sb.append("Comment: ").append(comment).append(", "); | |
219 sb.append("Manifest: ").append(manifest).append(", "); | |
220 sb.append("Date: ").append(time).append(", "); | |
221 sb.append("Files: ").append(files.size()); | |
222 for (String s : files) { | |
223 sb.append(", ").append(s); | |
224 } | |
225 if (extras != null) { | |
226 sb.append(", Extra: ").append(extras); | |
227 } | |
228 sb.append("}"); | |
229 return sb.toString(); | |
230 } | |
231 | |
232 @Override | |
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233 public RawChangeset clone() { |
153 | 234 try { |
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235 return (RawChangeset) super.clone(); |
153 | 236 } catch (CloneNotSupportedException ex) { |
237 throw new InternalError(ex.toString()); | |
238 } | |
239 } | |
240 | |
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241 public static RawChangeset parse(DataAccess da) { |
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242 try { |
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243 byte[] data = da.byteArray(); |
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244 RawChangeset rv = new RawChangeset(); |
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245 rv.init(data, 0, data.length, null); |
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246 return rv; |
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247 } catch (IOException ex) { |
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248 throw new HgBadStateException(ex); // FIXME "Error reading changeset data" |
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249 } |
153 | 250 } |
251 | |
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252 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null |
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253 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) { |
153 | 254 final int bufferEndIndex = offset + length; |
255 final byte lineBreak = (byte) '\n'; | |
256 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
257 if (breakIndex1 == -1) { | |
258 throw new IllegalArgumentException("Bad Changeset data"); | |
259 } | |
260 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
261 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
262 if (breakIndex2 == -1) { | |
263 throw new IllegalArgumentException("Bad Changeset data"); | |
264 } | |
265 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
196
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266 if (usersPool != null) { |
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267 _user = usersPool.unify(_user); |
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268 } |
153 | 269 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); |
270 if (breakIndex3 == -1) { | |
271 throw new IllegalArgumentException("Bad Changeset data"); | |
272 } | |
273 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
274 int space1 = _timeString.indexOf(' '); | |
275 if (space1 == -1) { | |
276 throw new IllegalArgumentException("Bad Changeset data"); | |
277 } | |
278 int space2 = _timeString.indexOf(' ', space1 + 1); | |
279 if (space2 == -1) { | |
280 space2 = _timeString.length(); | |
281 } | |
282 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps | |
283 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | |
284 // 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 | |
285 // on commit and timezone is recorded to adjust it to UTC. | |
286 Date _time = new Date(unixTime * 1000); | |
287 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
288 Map<String, String> _extrasMap; | |
252
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289 final String extras_branch_key = "branch"; |
153 | 290 if (_extras == null) { |
252
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291 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 292 } else { |
293 _extrasMap = new HashMap<String, String>(); | |
294 for (String pair : _extras.split("\00")) { | |
295 int eq = pair.indexOf(':'); | |
296 // FIXME need to decode key/value, @see changelog.py:decodeextra | |
297 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
298 } | |
252
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299 if (!_extrasMap.containsKey(extras_branch_key)) { |
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300 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); |
153 | 301 } |
302 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
303 } | |
304 | |
305 // | |
306 int lastStart = breakIndex3 + 1; | |
307 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
308 ArrayList<String> _files = null; | |
309 if (breakIndex4 > lastStart) { | |
310 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
311 _files = new ArrayList<String>(5); | |
312 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
313 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
314 lastStart = breakIndex4 + 1; | |
315 if (data[breakIndex4 + 1] == lineBreak) { | |
316 // found \n\n | |
317 break; | |
318 } else { | |
319 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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320 } |
153 | 321 } |
322 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
323 throw new IllegalArgumentException("Bad Changeset data"); | |
324 } | |
325 } else { | |
326 breakIndex4--; | |
327 } | |
328 String _comment; | |
329 try { | |
330 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
331 // FIXME respect ui.fallbackencoding and try to decode if set | |
332 } catch (UnsupportedEncodingException ex) { | |
333 _comment = ""; | |
334 throw new IllegalStateException("Could hardly happen"); | |
335 } | |
336 // change this instance at once, don't leave it partially changes in case of error | |
337 this.manifest = _nodeid; | |
338 this.user = _user; | |
339 this.time = _time; | |
340 this.timezone = _timezone; | |
341 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
342 this.comment = _comment; | |
343 this.extras = _extrasMap; | |
344 } | |
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345 |
153 | 346 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { |
347 for (int i = startOffset; i < endIndex; i++) { | |
348 if (src[i] == what) { | |
349 return i; | |
350 } | |
351 } | |
352 return -1; | |
353 } | |
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354 } |
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355 |
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356 private static class RawCsetCollector implements Inspector { |
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357 final ArrayList<RawChangeset> result; |
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358 |
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359 public RawCsetCollector(int count) { |
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360 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); |
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361 } |
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362 |
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363 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { |
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364 result.add(cset.clone()); |
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365 } |
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366 } |
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367 |
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368 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle { |
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369 |
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370 private final Inspector inspector; |
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371 private final Pool<String> usersPool; |
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372 private final RawChangeset cset = new RawChangeset(); |
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373 private final ProgressSupport progressHelper; |
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374 private IterateControlMediator iterateControl; |
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375 |
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376 public RawCsetParser(HgChangelog.Inspector delegate) { |
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377 assert delegate != null; |
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378 inspector = delegate; |
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379 usersPool = new Pool<String>(); |
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380 progressHelper = ProgressSupport.Factory.get(delegate); |
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381 } |
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382 |
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383 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { |
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384 try { |
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385 byte[] data = da.byteArray(); |
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386 cset.init(data, 0, data.length, usersPool); |
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387 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse |
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388 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); |
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389 progressHelper.worked(1); |
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390 } catch (Exception ex) { |
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391 throw new HgBadStateException(ex); // FIXME exception handling |
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392 } |
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393 if (iterateControl != null) { |
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394 iterateControl.checkCancelled(); |
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395 } |
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396 } |
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397 |
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398 public void start(int count, Callback callback, Object token) { |
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399 CancelSupport cs = CancelSupport.Factory.get(inspector, null); |
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400 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback); |
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401 progressHelper.start(count); |
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402 } |
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403 |
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404 public void finish(Object token) { |
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405 progressHelper.done(); |
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406 } |
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407 } |
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408 } |