Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 383:994b5813a925
Few comments
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
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| date | Mon, 13 Feb 2012 12:47:24 +0100 | 
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| children | 73e875154afb | 
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changeset | 1 /* | 
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changeset | 2 * Copyright (c) 2010-2011 TMate Software Ltd | 
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changeset | 3 * | 
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changeset | 4 * This program is free software; you can redistribute it and/or modify | 
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changeset | 5 * it under the terms of the GNU General Public License as published by | 
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changeset | 6 * the Free Software Foundation; version 2 of the License. | 
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changeset | 7 * | 
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changeset | 8 * This program is distributed in the hope that it will be useful, | 
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changeset | 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
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changeset | 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 
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changeset | 11 * GNU General Public License for more details. | 
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changeset | 12 * | 
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changeset | 13 * For information on how to redistribute this software under | 
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changeset | 14 * the terms of a license other than GNU General Public License | 
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changeset | 15 * contact TMate Software at support@hg4j.com | 
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changeset | 16 */ | 
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changeset | 17 package org.tmatesoft.hg.repo; | 
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changeset | 18 | 
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changeset | 19 import java.io.IOException; | 
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changeset | 20 import java.io.UnsupportedEncodingException; | 
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changeset | 21 import java.util.ArrayList; | 
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changeset | 22 import java.util.Arrays; | 
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changeset | 23 import java.util.Calendar; | 
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changeset | 24 import java.util.Collection; | 
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changeset | 25 import java.util.Collections; | 
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changeset | 26 import java.util.Date; | 
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changeset | 27 import java.util.Formatter; | 
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changeset | 28 import java.util.HashMap; | 
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changeset | 29 import java.util.List; | 
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changeset | 30 import java.util.Locale; | 
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changeset | 31 import java.util.Map; | 
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changeset | 32 import java.util.TimeZone; | 
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changeset | 33 | 
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changeset | 34 import org.tmatesoft.hg.core.HgBadArgumentException; | 
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changeset | 35 import org.tmatesoft.hg.core.HgException; | 
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changeset | 36 import org.tmatesoft.hg.core.HgInvalidControlFileException; | 
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changeset | 37 import org.tmatesoft.hg.core.HgInvalidRevisionException; | 
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changeset | 38 import org.tmatesoft.hg.core.Nodeid; | 
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changeset | 39 import org.tmatesoft.hg.internal.DataAccess; | 
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changeset | 40 import org.tmatesoft.hg.internal.IterateControlMediator; | 
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changeset | 41 import org.tmatesoft.hg.internal.Lifecycle; | 
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changeset | 42 import org.tmatesoft.hg.internal.Pool; | 
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changeset | 43 import org.tmatesoft.hg.internal.RevlogStream; | 
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changeset | 44 import org.tmatesoft.hg.util.CancelSupport; | 
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changeset | 45 import org.tmatesoft.hg.util.Pair; | 
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changeset | 46 import org.tmatesoft.hg.util.ProgressSupport; | 
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changeset | 47 | 
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changeset | 48 /** | 
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changeset | 49 * Representation of the Mercurial changelog file (list of ChangeSets) | 
| 153 | 50 * | 
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changeset | 51 * @author Artem Tikhomirov | 
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changeset | 52 * @author TMate Software Ltd. | 
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changeset | 53 */ | 
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changeset | 54 public class HgChangelog extends Revlog { | 
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changeset | 55 | 
| 153 | 56 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { | 
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changeset | 57 super(hgRepo, content); | 
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changeset | 58 } | 
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changeset | 59 | 
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changeset | 60 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { | 
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changeset | 61 range(0, getLastRevision(), inspector); | 
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changeset | 62 } | 
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changeset | 63 | 
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changeset | 64 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException { | 
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changeset | 65 if (inspector == null) { | 
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changeset | 66 throw new IllegalArgumentException(); | 
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changeset | 67 } | 
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changeset | 68 content.iterate(start, end, true, new RawCsetParser(inspector)); | 
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changeset | 69 } | 
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changeset | 70 | 
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changeset | 71 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException { | 
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changeset | 72 final RawCsetCollector c = new RawCsetCollector(end - start + 1); | 
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changeset | 73 range(start, end, c); | 
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changeset | 74 return c.result; | 
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changeset | 75 } | 
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changeset | 76 | 
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changeset | 77 /** | 
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changeset | 78 * Access individual revisions. Note, regardless of supplied revision order, inspector gets | 
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changeset | 79 * changesets strictly in the order they are in the changelog. | 
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changeset | 80 * @param inspector callback to get changesets | 
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changeset | 81 * @param revisions revisions to read, unrestricted ordering. | 
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changeset | 82 */ | 
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changeset | 83 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException { | 
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changeset | 84 Arrays.sort(revisions); | 
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changeset | 85 rangeInternal(inspector, revisions); | 
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changeset | 86 } | 
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changeset | 87 | 
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changeset | 88 /** | 
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changeset | 89 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted | 
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changeset | 90 */ | 
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changeset | 91 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException { | 
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changeset | 92 if (sortedRevisions == null || sortedRevisions.length == 0) { | 
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changeset | 93 return; | 
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changeset | 94 } | 
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changeset | 95 if (inspector == null) { | 
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changeset | 96 throw new IllegalArgumentException(); | 
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changeset | 97 } | 
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changeset | 98 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); | 
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changeset | 99 } | 
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changeset | 100 | 
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changeset | 101 /** | 
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changeset | 102 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog | 
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changeset | 103 * @throws HgInvalidControlFileException if access to revlog index/data entry failed | 
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changeset | 104 */ | 
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changeset | 105 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException { | 
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changeset | 106 int x = getRevisionIndex(nid); | 
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changeset | 107 return range(x, x).get(0); | 
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changeset | 108 } | 
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changeset | 109 | 
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changeset | 110 public interface Inspector { | 
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changeset | 111 // TODO describe whether cset is new instance each time | 
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changeset | 112 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) | 
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changeset | 113 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); | 
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changeset | 114 } | 
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changeset | 115 | 
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changeset | 116 /** | 
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changeset | 117 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according | 
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changeset | 118 * to parent information of the revlog this inspector visits. | 
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changeset | 119 * @see HgDataFile#history(TreeInspector) | 
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changeset | 120 * @deprecated use {@link HgChangesetTreeHandler} and HgLogCommand#execute(HgChangesetTreeHandler)} | 
| 317 
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changeset | 121 */ | 
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changeset | 122 @Deprecated | 
| 317 
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changeset | 123 public interface TreeInspector { | 
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changeset | 124 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can | 
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changeset | 125 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to, | 
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changeset | 126 // but changeset revisions always. | 
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changeset | 127 // TODO HgChangelog.walk(TreeInspector) | 
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changeset | 128 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets); | 
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changeset | 129 } | 
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changeset | 130 | 
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changeset | 131 /** | 
| 129 
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changeset | 132 * Entry in the Changelog | 
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changeset | 133 */ | 
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changeset | 134 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ | 
| 129 
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changeset | 135 // TODO immutable | 
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changeset | 136 private/* final */Nodeid manifest; | 
| 153 | 137 private String user; | 
| 138 private String comment; | |
| 139 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised) | |
| 140 private Date time; | |
| 141 private int timezone; | |
| 161 
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changeset | 142 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field. | 
| 153 | 143 private Map<String, String> extras; | 
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changeset | 144 | 
| 153 | 145 /** | 
| 146 * @see mercurial/changelog.py:read() | |
| 147 * | |
| 148 * <pre> | |
| 149 * format used: | |
| 150 * nodeid\n : manifest node in ascii | |
| 151 * user\n : user, no \n or \r allowed | |
| 152 * time tz extra\n : date (time is int or float, timezone is int) | |
| 153 * : extra is metadatas, encoded and separated by '\0' | |
| 154 * : older versions ignore it | |
| 155 * files\n\n : files modified by the cset, no \n or \r allowed | |
| 156 * (.*) : comment (free text, ideally utf-8) | |
| 157 * | |
| 158 * changelog v0 doesn't use extra | |
| 159 * </pre> | |
| 160 */ | |
| 154 
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changeset | 161 private RawChangeset() { | 
| 153 | 162 } | 
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changeset | 163 | 
| 153 | 164 public Nodeid manifest() { | 
| 165 return manifest; | |
| 166 } | |
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changeset | 167 | 
| 153 | 168 public String user() { | 
| 169 return user; | |
| 170 } | |
| 171 | |
| 172 public String comment() { | |
| 173 return comment; | |
| 174 } | |
| 175 | |
| 176 public List<String> files() { | |
| 177 return files; | |
| 178 } | |
| 179 | |
| 180 public Date date() { | |
| 181 return time; | |
| 182 } | |
| 211 
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changeset | 183 | 
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changeset | 184 /** | 
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changeset | 185 * @return time zone value, as is, positive for Western Hemisphere. | 
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changeset | 186 */ | 
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changeset | 187 public int timezone() { | 
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changeset | 188 return timezone; | 
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changeset | 189 } | 
| 153 | 190 | 
| 191 public String dateString() { | |
| 192 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone? | |
| 193 StringBuilder sb = new StringBuilder(30); | |
| 194 Formatter f = new Formatter(sb, Locale.US); | |
| 211 
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changeset | 195 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]); | 
| 153 | 196 // apparently timezone field records number of seconds time differs from UTC, | 
| 197 // i.e. value to substract from time to get UTC time. Calendar seems to add | |
| 198 // timezone offset to UTC, instead, hence sign change. | |
| 211 
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changeset | 199 // tz.setRawOffset(timezone * -1000); | 
| 153 | 200 Calendar c = Calendar.getInstance(tz, Locale.US); | 
| 201 c.setTime(time); | |
| 202 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c); | |
| 203 return sb.toString(); | |
| 204 } | |
| 205 | |
| 206 public Map<String, String> extras() { | |
| 207 return extras; | |
| 208 } | |
| 209 | |
| 210 public String branch() { | |
| 211 return extras.get("branch"); | |
| 212 } | |
| 213 | |
| 214 @Override | |
| 215 public String toString() { | |
| 216 StringBuilder sb = new StringBuilder(); | |
| 217 sb.append("Changeset {"); | |
| 218 sb.append("User: ").append(user).append(", "); | |
| 219 sb.append("Comment: ").append(comment).append(", "); | |
| 220 sb.append("Manifest: ").append(manifest).append(", "); | |
| 221 sb.append("Date: ").append(time).append(", "); | |
| 222 sb.append("Files: ").append(files.size()); | |
| 223 for (String s : files) { | |
| 224 sb.append(", ").append(s); | |
| 225 } | |
| 226 if (extras != null) { | |
| 227 sb.append(", Extra: ").append(extras); | |
| 228 } | |
| 229 sb.append("}"); | |
| 230 return sb.toString(); | |
| 231 } | |
| 232 | |
| 233 @Override | |
| 154 
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changeset | 234 public RawChangeset clone() { | 
| 153 | 235 try { | 
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changeset | 236 return (RawChangeset) super.clone(); | 
| 153 | 237 } catch (CloneNotSupportedException ex) { | 
| 238 throw new InternalError(ex.toString()); | |
| 239 } | |
| 240 } | |
| 241 | |
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changeset | 242 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgBadArgumentException { | 
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changeset | 243 byte[] data = da.byteArray(); | 
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changeset | 244 RawChangeset rv = new RawChangeset(); | 
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changeset | 245 rv.init(data, 0, data.length, null); | 
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changeset | 246 return rv; | 
| 153 | 247 } | 
| 248 | |
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changeset | 249 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null | 
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changeset | 250 // FIXME replace HgBadArgumentException with HgInvalidDataFormatException or HgInvalidControlFileException | 
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changeset | 251 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgBadArgumentException { | 
| 153 | 252 final int bufferEndIndex = offset + length; | 
| 253 final byte lineBreak = (byte) '\n'; | |
| 254 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
| 255 if (breakIndex1 == -1) { | |
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changeset | 256 throw new HgBadArgumentException("Bad Changeset data", null); | 
| 153 | 257 } | 
| 258 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
| 259 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
| 260 if (breakIndex2 == -1) { | |
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changeset | 261 throw new HgBadArgumentException("Bad Changeset data", null); | 
| 153 | 262 } | 
| 263 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
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changeset | 264 if (usersPool != null) { | 
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changeset | 265 _user = usersPool.unify(_user); | 
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changeset | 266 } | 
| 153 | 267 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); | 
| 268 if (breakIndex3 == -1) { | |
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changeset | 269 throw new HgBadArgumentException("Bad Changeset data", null); | 
| 153 | 270 } | 
| 271 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 272 int space1 = _timeString.indexOf(' '); | |
| 273 if (space1 == -1) { | |
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changeset | 274 throw new HgBadArgumentException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3), null); | 
| 153 | 275 } | 
| 276 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 277 if (space2 == -1) { | |
| 278 space2 = _timeString.length(); | |
| 279 } | |
| 363 
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changeset | 280 long unixTime = Long.parseLong(_timeString.substring(0, space1)); | 
| 153 | 281 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | 
| 363 
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changeset | 282 // unixTime is local time, and timezone records difference of the local time to UTC. | 
| 153 | 283 Date _time = new Date(unixTime * 1000); | 
| 284 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 285 Map<String, String> _extrasMap; | |
| 252 
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changeset | 286 final String extras_branch_key = "branch"; | 
| 153 | 287 if (_extras == null) { | 
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changeset | 288 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 289 } else { | 
| 290 _extrasMap = new HashMap<String, String>(); | |
| 291 for (String pair : _extras.split("\00")) { | |
| 363 
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changeset | 292 pair = decode(pair); | 
| 153 | 293 int eq = pair.indexOf(':'); | 
| 294 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 295 } | |
| 252 
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changeset | 296 if (!_extrasMap.containsKey(extras_branch_key)) { | 
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changeset | 297 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 298 } | 
| 299 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 300 } | |
| 301 | |
| 302 // | |
| 303 int lastStart = breakIndex3 + 1; | |
| 304 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 305 ArrayList<String> _files = null; | |
| 306 if (breakIndex4 > lastStart) { | |
| 307 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 308 _files = new ArrayList<String>(5); | |
| 309 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 310 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 311 lastStart = breakIndex4 + 1; | |
| 312 if (data[breakIndex4 + 1] == lineBreak) { | |
| 313 // found \n\n | |
| 314 break; | |
| 315 } else { | |
| 316 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
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changeset | 317 } | 
| 153 | 318 } | 
| 319 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
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changeset | 320 throw new HgBadArgumentException("Bad Changeset data", null); | 
| 153 | 321 } | 
| 322 } else { | |
| 323 breakIndex4--; | |
| 324 } | |
| 325 String _comment; | |
| 326 try { | |
| 327 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
| 328 // FIXME respect ui.fallbackencoding and try to decode if set | |
| 329 } catch (UnsupportedEncodingException ex) { | |
| 330 _comment = ""; | |
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changeset | 331 // Could hardly happen | 
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changeset | 332 throw new HgBadArgumentException("Bad Changeset data", ex); | 
| 153 | 333 } | 
| 334 // change this instance at once, don't leave it partially changes in case of error | |
| 335 this.manifest = _nodeid; | |
| 336 this.user = _user; | |
| 337 this.time = _time; | |
| 338 this.timezone = _timezone; | |
| 339 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 340 this.comment = _comment; | |
| 341 this.extras = _extrasMap; | |
| 342 } | |
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changeset | 343 | 
| 153 | 344 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { | 
| 345 for (int i = startOffset; i < endIndex; i++) { | |
| 346 if (src[i] == what) { | |
| 347 return i; | |
| 348 } | |
| 349 } | |
| 350 return -1; | |
| 351 } | |
| 363 
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changeset | 352 | 
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changeset | 353 private static String decode(String s) { | 
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changeset | 354 if (s != null && s.indexOf('\\') != -1) { | 
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changeset | 355 // TestAuxUtilities#testChangelogExtrasDecode | 
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changeset | 356 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00"); | 
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changeset | 357 } | 
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changeset | 358 return s; | 
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changeset | 359 } | 
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changeset | 360 } | 
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changeset | 361 | 
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changeset | 362 private static class RawCsetCollector implements Inspector { | 
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changeset | 363 final ArrayList<RawChangeset> result; | 
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changeset | 364 | 
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changeset | 365 public RawCsetCollector(int count) { | 
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changeset | 366 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); | 
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changeset | 367 } | 
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changeset | 368 | 
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changeset | 369 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { | 
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changeset | 370 result.add(cset.clone()); | 
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changeset | 371 } | 
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changeset | 372 } | 
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changeset | 373 | 
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changeset | 374 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle { | 
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changeset | 375 | 
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changeset | 376 private final Inspector inspector; | 
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changeset | 377 private final Pool<String> usersPool; | 
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changeset | 378 private final RawChangeset cset = new RawChangeset(); | 
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changeset | 379 private final ProgressSupport progressHelper; | 
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changeset | 380 private IterateControlMediator iterateControl; | 
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changeset | 381 | 
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changeset | 382 public RawCsetParser(HgChangelog.Inspector delegate) { | 
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changeset | 383 assert delegate != null; | 
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changeset | 384 inspector = delegate; | 
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changeset | 385 usersPool = new Pool<String>(); | 
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changeset | 386 progressHelper = ProgressSupport.Factory.get(delegate); | 
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changeset | 387 } | 
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changeset | 388 | 
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changeset | 389 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) throws HgException { | 
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changeset | 390 try { | 
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changeset | 391 byte[] data = da.byteArray(); | 
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changeset | 392 cset.init(data, 0, data.length, usersPool); | 
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changeset | 393 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse | 
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changeset | 394 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); | 
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changeset | 395 progressHelper.worked(1); | 
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changeset | 396 } catch (IOException ex) { | 
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changeset | 397 throw new HgException(ex); // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException) | 
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changeset | 398 } | 
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changeset | 399 if (iterateControl != null) { | 
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changeset | 400 iterateControl.checkCancelled(); | 
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changeset | 401 } | 
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changeset | 402 } | 
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changeset | 403 | 
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changeset | 404 public void start(int count, Callback callback, Object token) { | 
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changeset | 405 CancelSupport cs = CancelSupport.Factory.get(inspector, null); | 
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changeset | 406 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback); | 
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changeset | 407 progressHelper.start(count); | 
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changeset | 408 } | 
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changeset | 409 | 
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changeset | 410 public void finish(Object token) { | 
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changeset | 411 progressHelper.done(); | 
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changeset | 412 } | 
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changeset | 413 } | 
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changeset | 414 } | 
