Mercurial > hg4j
annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 365:3572fcb06473
Don't expose methods with DataAccess in public API
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
|---|---|
| date | Sun, 11 Dec 2011 00:39:07 +0100 | 
| parents | d9dfa9fe9cec | 
| children | 189dc6dc1c3e | 
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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.HgBadStateException; | 
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changeset | 35 import org.tmatesoft.hg.core.HgInvalidControlFileException; | 
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changeset | 36 import org.tmatesoft.hg.core.HgInvalidRevisionException; | 
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changeset | 37 import org.tmatesoft.hg.core.Nodeid; | 
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changeset | 38 import org.tmatesoft.hg.internal.DataAccess; | 
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changeset | 39 import org.tmatesoft.hg.internal.IterateControlMediator; | 
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changeset | 40 import org.tmatesoft.hg.internal.Lifecycle; | 
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changeset | 41 import org.tmatesoft.hg.internal.Pool; | 
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changeset | 42 import org.tmatesoft.hg.internal.RevlogStream; | 
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changeset | 43 import org.tmatesoft.hg.util.CancelSupport; | 
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changeset | 44 import org.tmatesoft.hg.util.Pair; | 
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changeset | 45 import org.tmatesoft.hg.util.ProgressSupport; | 
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changeset | 46 | 
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changeset | 47 /** | 
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changeset | 48 * Representation of the Mercurial changelog file (list of ChangeSets) | 
| 153 | 49 * | 
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changeset | 50 * @author Artem Tikhomirov | 
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changeset | 51 * @author TMate Software Ltd. | 
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changeset | 52 */ | 
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changeset | 53 public class HgChangelog extends Revlog { | 
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changeset | 54 | 
| 153 | 55 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) { | 
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changeset | 56 super(hgRepo, content); | 
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changeset | 57 } | 
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changeset | 58 | 
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changeset | 59 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException { | 
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changeset | 60 range(0, getLastRevision(), inspector); | 
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changeset | 61 } | 
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changeset | 62 | 
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changeset | 63 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException { | 
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changeset | 64 if (inspector == null) { | 
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changeset | 65 throw new IllegalArgumentException(); | 
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changeset | 66 } | 
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changeset | 67 content.iterate(start, end, true, new RawCsetParser(inspector)); | 
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changeset | 68 } | 
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changeset | 69 | 
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changeset | 70 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException { | 
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changeset | 71 final RawCsetCollector c = new RawCsetCollector(end - start + 1); | 
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changeset | 72 range(start, end, c); | 
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changeset | 73 return c.result; | 
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changeset | 74 } | 
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changeset | 75 | 
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changeset | 76 /** | 
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changeset | 77 * Access individual revisions. Note, regardless of supplied revision order, inspector gets | 
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changeset | 78 * changesets strictly in the order they are in the changelog. | 
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changeset | 79 * @param inspector callback to get changesets | 
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changeset | 80 * @param revisions revisions to read, unrestricted ordering. | 
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changeset | 81 */ | 
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changeset | 82 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException { | 
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changeset | 83 Arrays.sort(revisions); | 
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changeset | 84 rangeInternal(inspector, revisions); | 
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changeset | 85 } | 
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changeset | 86 | 
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changeset | 87 /** | 
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changeset | 88 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted | 
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changeset | 89 */ | 
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changeset | 90 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException { | 
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changeset | 91 if (sortedRevisions == null || sortedRevisions.length == 0) { | 
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changeset | 92 return; | 
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changeset | 93 } | 
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changeset | 94 if (inspector == null) { | 
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changeset | 95 throw new IllegalArgumentException(); | 
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changeset | 96 } | 
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changeset | 97 content.iterate(sortedRevisions, true, new RawCsetParser(inspector)); | 
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changeset | 98 } | 
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changeset | 99 | 
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changeset | 100 /** | 
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changeset | 101 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog | 
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changeset | 102 * @throws HgInvalidControlFileException if access to revlog index/data entry failed | 
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changeset | 103 */ | 
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changeset | 104 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException { | 
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changeset | 105 int x = getLocalRevision(nid); | 
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changeset | 106 return range(x, x).get(0); | 
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changeset | 107 } | 
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changeset | 108 | 
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changeset | 109 public interface Inspector { | 
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changeset | 110 // TODO describe whether cset is new instance each time | 
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changeset | 111 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?) | 
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changeset | 112 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset); | 
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changeset | 113 } | 
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changeset | 114 | 
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changeset | 115 /** | 
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changeset | 116 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according | 
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changeset | 117 * to parent information of the revlog this inspector visits. | 
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changeset | 118 * @see HgDataFile#history(TreeInspector) | 
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changeset | 119 * @deprecated use {@link HgChangesetTreeHandler} and HgLogCommand#execute(HgChangesetTreeHandler)} | 
| 317 
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changeset | 120 */ | 
| 328 
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changeset | 121 @Deprecated | 
| 317 
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changeset | 122 public interface TreeInspector { | 
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changeset | 123 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can | 
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changeset | 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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changeset | 125 // but changeset revisions always. | 
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changeset | 126 // TODO HgChangelog.walk(TreeInspector) | 
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changeset | 127 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets); | 
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changeset | 128 } | 
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changeset | 129 | 
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changeset | 130 /** | 
| 129 
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changeset | 131 * Entry in the Changelog | 
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changeset | 132 */ | 
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changeset | 133 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{ | 
| 129 
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changeset | 134 // TODO immutable | 
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changeset | 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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changeset | 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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changeset | 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 */ | |
| 154 
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changeset | 160 private RawChangeset() { | 
| 153 | 161 } | 
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changeset | 162 | 
| 153 | 163 public Nodeid manifest() { | 
| 164 return manifest; | |
| 165 } | |
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changeset | 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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changeset | 182 | 
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changeset | 183 /** | 
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changeset | 184 * @return time zone value, as is, positive for Western Hemisphere. | 
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changeset | 185 */ | 
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changeset | 186 public int timezone() { | 
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changeset | 187 return timezone; | 
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changeset | 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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changeset | 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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changeset | 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 | |
| 154 
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changeset | 233 public RawChangeset clone() { | 
| 153 | 234 try { | 
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changeset | 235 return (RawChangeset) super.clone(); | 
| 153 | 236 } catch (CloneNotSupportedException ex) { | 
| 237 throw new InternalError(ex.toString()); | |
| 238 } | |
| 239 } | |
| 240 | |
| 365 
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changeset | 241 /*package*/ static RawChangeset parse(DataAccess da) throws IOException { | 
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changeset | 242 byte[] data = da.byteArray(); | 
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changeset | 243 RawChangeset rv = new RawChangeset(); | 
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changeset | 244 rv.init(data, 0, data.length, null); | 
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changeset | 245 return rv; | 
| 153 | 246 } | 
| 247 | |
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changeset | 248 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null | 
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changeset | 249 // FIXME throws "Error reading changeset data" | 
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changeset | 250 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) { | 
| 153 | 251 final int bufferEndIndex = offset + length; | 
| 252 final byte lineBreak = (byte) '\n'; | |
| 253 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); | |
| 254 if (breakIndex1 == -1) { | |
| 255 throw new IllegalArgumentException("Bad Changeset data"); | |
| 256 } | |
| 257 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); | |
| 258 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex); | |
| 259 if (breakIndex2 == -1) { | |
| 260 throw new IllegalArgumentException("Bad Changeset data"); | |
| 261 } | |
| 262 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1); | |
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changeset | 263 if (usersPool != null) { | 
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changeset | 264 _user = usersPool.unify(_user); | 
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changeset | 265 } | 
| 153 | 266 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex); | 
| 267 if (breakIndex3 == -1) { | |
| 268 throw new IllegalArgumentException("Bad Changeset data"); | |
| 269 } | |
| 270 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1); | |
| 271 int space1 = _timeString.indexOf(' '); | |
| 272 if (space1 == -1) { | |
| 273 throw new IllegalArgumentException("Bad Changeset data"); | |
| 274 } | |
| 275 int space2 = _timeString.indexOf(' ', space1 + 1); | |
| 276 if (space2 == -1) { | |
| 277 space2 = _timeString.length(); | |
| 278 } | |
| 363 
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changeset | 279 long unixTime = Long.parseLong(_timeString.substring(0, space1)); | 
| 153 | 280 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2)); | 
| 363 
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changeset | 281 // unixTime is local time, and timezone records difference of the local time to UTC. | 
| 153 | 282 Date _time = new Date(unixTime * 1000); | 
| 283 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null; | |
| 284 Map<String, String> _extrasMap; | |
| 252 
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changeset | 285 final String extras_branch_key = "branch"; | 
| 153 | 286 if (_extras == null) { | 
| 252 
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changeset | 287 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 288 } else { | 
| 289 _extrasMap = new HashMap<String, String>(); | |
| 290 for (String pair : _extras.split("\00")) { | |
| 363 
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changeset | 291 pair = decode(pair); | 
| 153 | 292 int eq = pair.indexOf(':'); | 
| 293 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1)); | |
| 294 } | |
| 252 
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changeset | 295 if (!_extrasMap.containsKey(extras_branch_key)) { | 
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changeset | 296 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME); | 
| 153 | 297 } | 
| 298 _extrasMap = Collections.unmodifiableMap(_extrasMap); | |
| 299 } | |
| 300 | |
| 301 // | |
| 302 int lastStart = breakIndex3 + 1; | |
| 303 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 304 ArrayList<String> _files = null; | |
| 305 if (breakIndex4 > lastStart) { | |
| 306 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision) | |
| 307 _files = new ArrayList<String>(5); | |
| 308 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { | |
| 309 _files.add(new String(data, lastStart, breakIndex4 - lastStart)); | |
| 310 lastStart = breakIndex4 + 1; | |
| 311 if (data[breakIndex4 + 1] == lineBreak) { | |
| 312 // found \n\n | |
| 313 break; | |
| 314 } else { | |
| 315 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); | |
| 129 
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changeset | 316 } | 
| 153 | 317 } | 
| 318 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { | |
| 319 throw new IllegalArgumentException("Bad Changeset data"); | |
| 320 } | |
| 321 } else { | |
| 322 breakIndex4--; | |
| 323 } | |
| 324 String _comment; | |
| 325 try { | |
| 326 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); | |
| 327 // FIXME respect ui.fallbackencoding and try to decode if set | |
| 328 } catch (UnsupportedEncodingException ex) { | |
| 329 _comment = ""; | |
| 330 throw new IllegalStateException("Could hardly happen"); | |
| 331 } | |
| 332 // change this instance at once, don't leave it partially changes in case of error | |
| 333 this.manifest = _nodeid; | |
| 334 this.user = _user; | |
| 335 this.time = _time; | |
| 336 this.timezone = _timezone; | |
| 337 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files); | |
| 338 this.comment = _comment; | |
| 339 this.extras = _extrasMap; | |
| 340 } | |
| 129 
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changeset | 341 | 
| 153 | 342 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { | 
| 343 for (int i = startOffset; i < endIndex; i++) { | |
| 344 if (src[i] == what) { | |
| 345 return i; | |
| 346 } | |
| 347 } | |
| 348 return -1; | |
| 349 } | |
| 363 
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changeset | 350 | 
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changeset | 351 private static String decode(String s) { | 
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changeset | 352 if (s != null && s.indexOf('\\') != -1) { | 
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changeset | 353 // TestAuxUtilities#testChangelogExtrasDecode | 
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changeset | 354 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00"); | 
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changeset | 355 } | 
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changeset | 356 return s; | 
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changeset | 357 } | 
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changeset | 358 } | 
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changeset | 359 | 
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changeset | 360 private static class RawCsetCollector implements Inspector { | 
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changeset | 361 final ArrayList<RawChangeset> result; | 
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changeset | 362 | 
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changeset | 363 public RawCsetCollector(int count) { | 
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changeset | 364 result = new ArrayList<RawChangeset>(count > 0 ? count : 5); | 
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changeset | 365 } | 
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changeset | 366 | 
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changeset | 367 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) { | 
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changeset | 368 result.add(cset.clone()); | 
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changeset | 369 } | 
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changeset | 370 } | 
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changeset | 371 | 
| 312 
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changeset | 372 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle { | 
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changeset | 373 | 
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changeset | 374 private final Inspector inspector; | 
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changeset | 375 private final Pool<String> usersPool; | 
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changeset | 376 private final RawChangeset cset = new RawChangeset(); | 
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changeset | 377 private final ProgressSupport progressHelper; | 
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changeset | 378 private IterateControlMediator iterateControl; | 
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changeset | 379 | 
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changeset | 380 public RawCsetParser(HgChangelog.Inspector delegate) { | 
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changeset | 381 assert delegate != null; | 
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changeset | 382 inspector = delegate; | 
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changeset | 383 usersPool = new Pool<String>(); | 
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changeset | 384 progressHelper = ProgressSupport.Factory.get(delegate); | 
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changeset | 385 } | 
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changeset | 386 | 
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changeset | 387 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) { | 
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changeset | 388 try { | 
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changeset | 389 byte[] data = da.byteArray(); | 
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changeset | 390 cset.init(data, 0, data.length, usersPool); | 
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changeset | 391 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse | 
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changeset | 392 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset); | 
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changeset | 393 progressHelper.worked(1); | 
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changeset | 394 } catch (Exception ex) { | 
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changeset | 395 throw new HgBadStateException(ex); // FIXME exception handling | 
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changeset | 396 } | 
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changeset | 397 if (iterateControl != null) { | 
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changeset | 398 iterateControl.checkCancelled(); | 
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changeset | 399 } | 
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changeset | 400 } | 
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changeset | 401 | 
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changeset | 402 public void start(int count, Callback callback, Object token) { | 
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changeset | 403 CancelSupport cs = CancelSupport.Factory.get(inspector, null); | 
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changeset | 404 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback); | 
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changeset | 405 progressHelper.start(count); | 
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changeset | 406 } | 
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changeset | 407 | 
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changeset | 408 public void finish(Object token) { | 
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changeset | 409 progressHelper.done(); | 
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changeset | 410 } | 
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changeset | 411 } | 
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changeset | 412 } | 
