Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 317:09628675bcee

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rework file history build approach to match rest of the API
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 29 Sep 2011 03:20:28 +0200
parents f9f3e9b67ccc
children a674b8590362
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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33
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34 import org.tmatesoft.hg.core.HgBadStateException;
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35 import org.tmatesoft.hg.core.Nodeid;
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36 import org.tmatesoft.hg.internal.DataAccess;
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37 import org.tmatesoft.hg.internal.IterateControlMediator;
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38 import org.tmatesoft.hg.internal.Lifecycle;
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39 import org.tmatesoft.hg.internal.Pool;
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40 import org.tmatesoft.hg.internal.RevlogStream;
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41 import org.tmatesoft.hg.util.CancelSupport;
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42 import org.tmatesoft.hg.util.Pair;
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43 import org.tmatesoft.hg.util.ProgressSupport;
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44
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45 /**
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46 * Representation of the Mercurial changelog file (list of ChangeSets)
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47 *
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48 * @author Artem Tikhomirov
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49 * @author TMate Software Ltd.
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50 */
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51 public class HgChangelog extends Revlog {
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52
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53 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) {
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54 super(hgRepo, content);
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55 }
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56
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57 public void all(final HgChangelog.Inspector inspector) {
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58 range(0, getLastRevision(), inspector);
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59 }
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60
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61 public void range(int start, int end, final HgChangelog.Inspector inspector) {
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62 if (inspector == null) {
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63 throw new IllegalArgumentException();
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64 }
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65 content.iterate(start, end, true, new RawCsetParser(inspector));
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66 }
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67
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68 public List<RawChangeset> range(int start, int end) {
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69 final RawCsetCollector c = new RawCsetCollector(end - start + 1);
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70 range(start, end, c);
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71 return c.result;
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72 }
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73
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74 /**
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75 * Access individual revisions. Note, regardless of supplied revision order, inspector gets
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76 * changesets strictly in the order they are in the changelog.
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77 * @param inspector callback to get changesets
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78 * @param revisions revisions to read, unrestricted ordering.
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79 */
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80 public void range(final HgChangelog.Inspector inspector, final int... revisions) {
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81 Arrays.sort(revisions);
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82 rangeInternal(inspector, revisions);
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83 }
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85 /**
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86 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted
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87 */
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88 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) {
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89 if (sortedRevisions == null || sortedRevisions.length == 0) {
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90 return;
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91 }
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92 if (inspector == null) {
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93 throw new IllegalArgumentException();
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94 }
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95 content.iterate(sortedRevisions, true, new RawCsetParser(inspector));
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96 }
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98 public RawChangeset changeset(Nodeid nid) {
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99 int x = getLocalRevision(nid);
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100 return range(x, x).get(0);
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101 }
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102
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103 public interface Inspector {
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104 // TODO describe whether cset is new instance each time
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105 // describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?)
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106 void next(int revisionNumber, Nodeid nodeid, RawChangeset cset);
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107 }
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108
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109 /**
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110 * Unlike regular {@link Inspector}, this one supplies changeset revision along with its parents and children according
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111 * to parent information of the revlog this inspector visits.
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112 * @see HgDataFile#history(TreeInspector)
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113 */
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114 public interface TreeInspector {
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115 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can
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116 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to,
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117 // but changeset revisions always.
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118 // TODO HgChangelog.walk(TreeInspector)
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119 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets);
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120 }
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121
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122 /**
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123 * Entry in the Changelog
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124 */
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125 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
129
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126 // TODO immutable
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127 private/* final */Nodeid manifest;
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128 private String user;
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129 private String comment;
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130 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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131 private Date time;
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132 private int timezone;
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133 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
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134 private Map<String, String> extras;
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135
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136 /**
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137 * @see mercurial/changelog.py:read()
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138 *
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139 * <pre>
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140 * format used:
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141 * nodeid\n : manifest node in ascii
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142 * user\n : user, no \n or \r allowed
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143 * time tz extra\n : date (time is int or float, timezone is int)
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144 * : extra is metadatas, encoded and separated by '\0'
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145 * : older versions ignore it
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146 * files\n\n : files modified by the cset, no \n or \r allowed
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147 * (.*) : comment (free text, ideally utf-8)
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148 *
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149 * changelog v0 doesn't use extra
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150 * </pre>
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151 */
154
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152 private RawChangeset() {
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153 }
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154
153
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155 public Nodeid manifest() {
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156 return manifest;
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157 }
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158
153
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159 public String user() {
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160 return user;
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161 }
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162
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163 public String comment() {
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164 return comment;
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165 }
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166
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167 public List<String> files() {
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168 return files;
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169 }
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170
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171 public Date date() {
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172 return time;
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173 }
211
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174
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175 /**
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176 * @return time zone value, as is, positive for Western Hemisphere.
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177 */
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178 public int timezone() {
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179 return timezone;
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180 }
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181
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182 public String dateString() {
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183 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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184 StringBuilder sb = new StringBuilder(30);
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185 Formatter f = new Formatter(sb, Locale.US);
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186 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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187 // apparently timezone field records number of seconds time differs from UTC,
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188 // i.e. value to substract from time to get UTC time. Calendar seems to add
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189 // timezone offset to UTC, instead, hence sign change.
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190 // tz.setRawOffset(timezone * -1000);
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191 Calendar c = Calendar.getInstance(tz, Locale.US);
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192 c.setTime(time);
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193 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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194 return sb.toString();
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195 }
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196
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197 public Map<String, String> extras() {
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198 return extras;
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199 }
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200
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201 public String branch() {
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202 return extras.get("branch");
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203 }
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204
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205 @Override
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206 public String toString() {
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207 StringBuilder sb = new StringBuilder();
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208 sb.append("Changeset {");
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209 sb.append("User: ").append(user).append(", ");
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210 sb.append("Comment: ").append(comment).append(", ");
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211 sb.append("Manifest: ").append(manifest).append(", ");
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212 sb.append("Date: ").append(time).append(", ");
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213 sb.append("Files: ").append(files.size());
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214 for (String s : files) {
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215 sb.append(", ").append(s);
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216 }
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217 if (extras != null) {
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218 sb.append(", Extra: ").append(extras);
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219 }
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220 sb.append("}");
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221 return sb.toString();
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222 }
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223
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224 @Override
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225 public RawChangeset clone() {
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226 try {
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227 return (RawChangeset) super.clone();
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228 } catch (CloneNotSupportedException ex) {
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229 throw new InternalError(ex.toString());
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230 }
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231 }
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232
157
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233 public static RawChangeset parse(DataAccess da) {
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234 try {
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235 byte[] data = da.byteArray();
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236 RawChangeset rv = new RawChangeset();
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237 rv.init(data, 0, data.length, null);
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238 return rv;
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239 } catch (IOException ex) {
196
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240 throw new HgBadStateException(ex); // FIXME "Error reading changeset data"
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241 }
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242 }
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243
196
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244 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null
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245 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) {
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246 final int bufferEndIndex = offset + length;
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247 final byte lineBreak = (byte) '\n';
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248 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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249 if (breakIndex1 == -1) {
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250 throw new IllegalArgumentException("Bad Changeset data");
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251 }
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252 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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253 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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254 if (breakIndex2 == -1) {
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255 throw new IllegalArgumentException("Bad Changeset data");
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256 }
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257 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1);
196
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258 if (usersPool != null) {
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259 _user = usersPool.unify(_user);
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260 }
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261 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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262 if (breakIndex3 == -1) {
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263 throw new IllegalArgumentException("Bad Changeset data");
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264 }
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265 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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266 int space1 = _timeString.indexOf(' ');
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267 if (space1 == -1) {
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268 throw new IllegalArgumentException("Bad Changeset data");
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269 }
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270 int space2 = _timeString.indexOf(' ', space1 + 1);
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271 if (space2 == -1) {
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272 space2 = _timeString.length();
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273 }
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274 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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275 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
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276 // 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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277 // on commit and timezone is recorded to adjust it to UTC.
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278 Date _time = new Date(unixTime * 1000);
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279 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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280 Map<String, String> _extrasMap;
252
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281 final String extras_branch_key = "branch";
153
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282 if (_extras == null) {
252
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283 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
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284 } else {
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285 _extrasMap = new HashMap<String, String>();
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286 for (String pair : _extras.split("\00")) {
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287 int eq = pair.indexOf(':');
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288 // FIXME need to decode key/value, @see changelog.py:decodeextra
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289 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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290 }
252
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291 if (!_extrasMap.containsKey(extras_branch_key)) {
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292 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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293 }
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294 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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295 }
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296
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297 //
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298 int lastStart = breakIndex3 + 1;
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299 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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300 ArrayList<String> _files = null;
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301 if (breakIndex4 > lastStart) {
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302 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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303 _files = new ArrayList<String>(5);
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304 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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305 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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306 lastStart = breakIndex4 + 1;
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307 if (data[breakIndex4 + 1] == lineBreak) {
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308 // found \n\n
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309 break;
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310 } else {
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311 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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312 }
153
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313 }
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314 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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315 throw new IllegalArgumentException("Bad Changeset data");
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316 }
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317 } else {
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318 breakIndex4--;
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319 }
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320 String _comment;
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321 try {
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322 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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323 // FIXME respect ui.fallbackencoding and try to decode if set
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324 } catch (UnsupportedEncodingException ex) {
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325 _comment = "";
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326 throw new IllegalStateException("Could hardly happen");
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327 }
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328 // change this instance at once, don't leave it partially changes in case of error
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329 this.manifest = _nodeid;
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330 this.user = _user;
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331 this.time = _time;
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332 this.timezone = _timezone;
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333 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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334 this.comment = _comment;
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335 this.extras = _extrasMap;
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336 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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337
153
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338 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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339 for (int i = startOffset; i < endIndex; i++) {
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340 if (src[i] == what) {
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341 return i;
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342 }
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343 }
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344 return -1;
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345 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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346 }
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347
196
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348 private static class RawCsetCollector implements Inspector {
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349 final ArrayList<RawChangeset> result;
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350
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351 public RawCsetCollector(int count) {
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352 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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353 }
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354
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355 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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356 result.add(cset.clone());
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357 }
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358 }
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359
312
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360 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle {
196
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361
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362 private final Inspector inspector;
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363 private final Pool<String> usersPool;
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364 private final RawChangeset cset = new RawChangeset();
312
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365 private final ProgressSupport progressHelper;
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366 private IterateControlMediator iterateControl;
196
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367
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368 public RawCsetParser(HgChangelog.Inspector delegate) {
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369 assert delegate != null;
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370 inspector = delegate;
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371 usersPool = new Pool<String>();
312
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372 progressHelper = ProgressSupport.Factory.get(delegate);
196
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373 }
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374
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375 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
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376 try {
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377 byte[] data = da.byteArray();
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378 cset.init(data, 0, data.length, usersPool);
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diff changeset
379 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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diff changeset
380 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
312
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381 progressHelper.worked(1);
196
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382 } catch (Exception ex) {
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383 throw new HgBadStateException(ex); // FIXME exception handling
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384 }
312
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diff changeset
385 if (iterateControl != null) {
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diff changeset
386 iterateControl.checkCancelled();
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diff changeset
387 }
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diff changeset
388 }
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diff changeset
389
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390 public void start(int count, Callback callback, Object token) {
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391 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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diff changeset
392 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback);
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diff changeset
393 progressHelper.start(count);
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diff changeset
394 }
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diff changeset
395
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diff changeset
396 public void finish(Object token) {
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diff changeset
397 progressHelper.done();
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 182
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398 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 182
diff changeset
399 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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400 }