Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 355:f2c11fe7f3e9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Newline filter shall respect whole stream when deciding whether to process line terminators, hence added stream preview functionality
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 06 Dec 2011 12:57:21 +0100
parents 5f9073eabf06
children 150500515714
rev   line source
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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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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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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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49 *
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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
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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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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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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 /**
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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)}
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120 */
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121 @Deprecated
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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;
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136 private String user;
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137 private String comment;
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138 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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139 private Date time;
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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.
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142 private Map<String, String> extras;
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143
153
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144 /**
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145 * @see mercurial/changelog.py:read()
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146 *
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147 * <pre>
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148 * format used:
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149 * nodeid\n : manifest node in ascii
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150 * user\n : user, no \n or \r allowed
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151 * time tz extra\n : date (time is int or float, timezone is int)
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152 * : extra is metadatas, encoded and separated by '\0'
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153 * : older versions ignore it
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154 * files\n\n : files modified by the cset, no \n or \r allowed
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155 * (.*) : comment (free text, ideally utf-8)
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156 *
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157 * changelog v0 doesn't use extra
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158 * </pre>
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159 */
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160 private RawChangeset() {
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161 }
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162
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163 public Nodeid manifest() {
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164 return manifest;
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165 }
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166
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167 public String user() {
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168 return user;
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169 }
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170
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171 public String comment() {
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172 return comment;
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173 }
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174
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175 public List<String> files() {
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176 return files;
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177 }
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178
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179 public Date date() {
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180 return time;
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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 }
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189
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190 public String dateString() {
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191 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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192 StringBuilder sb = new StringBuilder(30);
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193 Formatter f = new Formatter(sb, Locale.US);
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194 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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195 // apparently timezone field records number of seconds time differs from UTC,
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196 // i.e. value to substract from time to get UTC time. Calendar seems to add
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197 // timezone offset to UTC, instead, hence sign change.
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198 // tz.setRawOffset(timezone * -1000);
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199 Calendar c = Calendar.getInstance(tz, Locale.US);
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200 c.setTime(time);
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201 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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202 return sb.toString();
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203 }
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204
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205 public Map<String, String> extras() {
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206 return extras;
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207 }
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208
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209 public String branch() {
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210 return extras.get("branch");
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211 }
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212
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213 @Override
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214 public String toString() {
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215 StringBuilder sb = new StringBuilder();
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216 sb.append("Changeset {");
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217 sb.append("User: ").append(user).append(", ");
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218 sb.append("Comment: ").append(comment).append(", ");
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219 sb.append("Manifest: ").append(manifest).append(", ");
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220 sb.append("Date: ").append(time).append(", ");
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221 sb.append("Files: ").append(files.size());
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222 for (String s : files) {
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223 sb.append(", ").append(s);
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224 }
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225 if (extras != null) {
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226 sb.append(", Extra: ").append(extras);
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227 }
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228 sb.append("}");
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229 return sb.toString();
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230 }
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231
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232 @Override
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233 public RawChangeset clone() {
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234 try {
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235 return (RawChangeset) super.clone();
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236 } catch (CloneNotSupportedException ex) {
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237 throw new InternalError(ex.toString());
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238 }
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239 }
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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) {
196
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248 throw new HgBadStateException(ex); // FIXME "Error reading changeset data"
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249 }
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250 }
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251
196
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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) {
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254 final int bufferEndIndex = offset + length;
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255 final byte lineBreak = (byte) '\n';
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256 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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257 if (breakIndex1 == -1) {
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258 throw new IllegalArgumentException("Bad Changeset data");
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259 }
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260 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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261 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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262 if (breakIndex2 == -1) {
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263 throw new IllegalArgumentException("Bad Changeset data");
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264 }
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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
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269 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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270 if (breakIndex3 == -1) {
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271 throw new IllegalArgumentException("Bad Changeset data");
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272 }
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273 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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274 int space1 = _timeString.indexOf(' ');
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275 if (space1 == -1) {
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276 throw new IllegalArgumentException("Bad Changeset data");
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277 }
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278 int space2 = _timeString.indexOf(' ', space1 + 1);
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279 if (space2 == -1) {
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280 space2 = _timeString.length();
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281 }
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282 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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283 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
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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
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285 // on commit and timezone is recorded to adjust it to UTC.
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286 Date _time = new Date(unixTime * 1000);
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287 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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288 Map<String, String> _extrasMap;
252
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289 final String extras_branch_key = "branch";
153
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290 if (_extras == null) {
252
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291 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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292 } else {
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293 _extrasMap = new HashMap<String, String>();
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294 for (String pair : _extras.split("\00")) {
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295 int eq = pair.indexOf(':');
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296 // FIXME need to decode key/value, @see changelog.py:decodeextra
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297 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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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
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301 }
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302 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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303 }
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304
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305 //
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306 int lastStart = breakIndex3 + 1;
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307 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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308 ArrayList<String> _files = null;
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309 if (breakIndex4 > lastStart) {
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310 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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311 _files = new ArrayList<String>(5);
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312 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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313 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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314 lastStart = breakIndex4 + 1;
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315 if (data[breakIndex4 + 1] == lineBreak) {
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316 // found \n\n
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317 break;
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318 } else {
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319 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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320 }
153
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321 }
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322 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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323 throw new IllegalArgumentException("Bad Changeset data");
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324 }
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325 } else {
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326 breakIndex4--;
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327 }
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328 String _comment;
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329 try {
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330 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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331 // FIXME respect ui.fallbackencoding and try to decode if set
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332 } catch (UnsupportedEncodingException ex) {
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333 _comment = "";
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334 throw new IllegalStateException("Could hardly happen");
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335 }
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336 // change this instance at once, don't leave it partially changes in case of error
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337 this.manifest = _nodeid;
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338 this.user = _user;
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339 this.time = _time;
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340 this.timezone = _timezone;
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341 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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342 this.comment = _comment;
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343 this.extras = _extrasMap;
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344 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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345
153
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diff changeset
346 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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347 for (int i = startOffset; i < endIndex; i++) {
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348 if (src[i] == what) {
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349 return i;
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350 }
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351 }
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352 return -1;
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diff changeset
353 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
354 }
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
355
196
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diff changeset
356 private static class RawCsetCollector implements Inspector {
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diff changeset
357 final ArrayList<RawChangeset> result;
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358
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diff changeset
359 public RawCsetCollector(int count) {
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diff changeset
360 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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diff changeset
361 }
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diff changeset
362
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diff changeset
363 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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diff changeset
364 result.add(cset.clone());
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diff changeset
365 }
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diff changeset
366 }
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diff changeset
367
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
368 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle {
196
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diff changeset
369
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diff changeset
370 private final Inspector inspector;
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371 private final Pool<String> usersPool;
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diff changeset
372 private final RawChangeset cset = new RawChangeset();
312
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diff changeset
373 private final ProgressSupport progressHelper;
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diff changeset
374 private IterateControlMediator iterateControl;
196
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diff changeset
375
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diff changeset
376 public RawCsetParser(HgChangelog.Inspector delegate) {
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diff changeset
377 assert delegate != null;
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diff changeset
378 inspector = delegate;
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diff changeset
379 usersPool = new Pool<String>();
312
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diff changeset
380 progressHelper = ProgressSupport.Factory.get(delegate);
196
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diff changeset
381 }
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diff changeset
382
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diff changeset
383 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
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diff changeset
384 try {
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diff changeset
385 byte[] data = da.byteArray();
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diff changeset
386 cset.init(data, 0, data.length, usersPool);
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diff changeset
387 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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diff changeset
388 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
312
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diff changeset
389 progressHelper.worked(1);
196
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diff changeset
390 } catch (Exception ex) {
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diff changeset
391 throw new HgBadStateException(ex); // FIXME exception handling
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diff changeset
392 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
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diff changeset
393 if (iterateControl != null) {
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diff changeset
394 iterateControl.checkCancelled();
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diff changeset
395 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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396 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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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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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 252
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403
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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404 public void finish(Object token) {
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405 progressHelper.done();
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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406 }
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407 }
0
dbd663faec1f Basic changelog parsing
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408 }