Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents 694ebabb5cb3
children 5f9073eabf06
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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18
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19 import java.io.IOException;
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20 import java.io.UnsupportedEncodingException;
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21 import java.util.ArrayList;
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22 import java.util.Arrays;
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23 import java.util.Calendar;
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24 import java.util.Collection;
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25 import java.util.Collections;
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26 import java.util.Date;
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27 import java.util.Formatter;
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28 import java.util.HashMap;
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29 import java.util.List;
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30 import java.util.Locale;
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31 import java.util.Map;
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32 import java.util.TimeZone;
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33
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34 import org.tmatesoft.hg.core.HgBadStateException;
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35 import org.tmatesoft.hg.core.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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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 * @deprecated use {@link HgChangesetTreeHandler} and HgLogCommand#execute(HgChangesetTreeHandler)}
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114 */
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115 @Deprecated
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116 public interface TreeInspector {
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117 // the reason TreeInsector is in HgChangelog, not in Revlog, because despite the fact it can
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118 // be applied to any revlog, it's not meant to provide revisions of any revlog it's beeing applied to,
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119 // but changeset revisions always.
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120 // TODO HgChangelog.walk(TreeInspector)
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121 void next(Nodeid changesetRevision, Pair<Nodeid, Nodeid> parentChangesets, Collection<Nodeid> childChangesets);
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122 }
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123
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124 /**
129
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125 * Entry in the Changelog
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126 */
154
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127 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
129
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128 // TODO immutable
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129 private/* final */Nodeid manifest;
153
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130 private String user;
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131 private String comment;
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132 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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133 private Date time;
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134 private int timezone;
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135 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
153
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136 private Map<String, String> extras;
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137
153
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138 /**
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139 * @see mercurial/changelog.py:read()
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140 *
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141 * <pre>
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142 * format used:
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143 * nodeid\n : manifest node in ascii
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144 * user\n : user, no \n or \r allowed
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145 * time tz extra\n : date (time is int or float, timezone is int)
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146 * : extra is metadatas, encoded and separated by '\0'
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147 * : older versions ignore it
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148 * files\n\n : files modified by the cset, no \n or \r allowed
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149 * (.*) : comment (free text, ideally utf-8)
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150 *
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151 * changelog v0 doesn't use extra
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152 * </pre>
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153 */
154
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154 private RawChangeset() {
153
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155 }
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156
153
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157 public Nodeid manifest() {
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158 return manifest;
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159 }
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160
153
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161 public String user() {
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162 return user;
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163 }
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164
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165 public String comment() {
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166 return comment;
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167 }
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168
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169 public List<String> files() {
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170 return files;
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171 }
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172
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173 public Date date() {
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174 return time;
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175 }
211
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176
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177 /**
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178 * @return time zone value, as is, positive for Western Hemisphere.
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179 */
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180 public int timezone() {
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181 return timezone;
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182 }
153
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183
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184 public String dateString() {
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185 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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186 StringBuilder sb = new StringBuilder(30);
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187 Formatter f = new Formatter(sb, Locale.US);
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188 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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189 // apparently timezone field records number of seconds time differs from UTC,
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190 // i.e. value to substract from time to get UTC time. Calendar seems to add
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191 // timezone offset to UTC, instead, hence sign change.
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192 // tz.setRawOffset(timezone * -1000);
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193 Calendar c = Calendar.getInstance(tz, Locale.US);
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194 c.setTime(time);
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195 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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196 return sb.toString();
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197 }
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198
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199 public Map<String, String> extras() {
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200 return extras;
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201 }
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202
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203 public String branch() {
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204 return extras.get("branch");
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205 }
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206
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207 @Override
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208 public String toString() {
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209 StringBuilder sb = new StringBuilder();
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210 sb.append("Changeset {");
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211 sb.append("User: ").append(user).append(", ");
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212 sb.append("Comment: ").append(comment).append(", ");
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213 sb.append("Manifest: ").append(manifest).append(", ");
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214 sb.append("Date: ").append(time).append(", ");
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215 sb.append("Files: ").append(files.size());
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216 for (String s : files) {
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217 sb.append(", ").append(s);
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218 }
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219 if (extras != null) {
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220 sb.append(", Extra: ").append(extras);
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221 }
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222 sb.append("}");
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223 return sb.toString();
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224 }
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225
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226 @Override
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227 public RawChangeset clone() {
153
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228 try {
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229 return (RawChangeset) super.clone();
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230 } catch (CloneNotSupportedException ex) {
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231 throw new InternalError(ex.toString());
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232 }
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233 }
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234
157
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235 public static RawChangeset parse(DataAccess da) {
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236 try {
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237 byte[] data = da.byteArray();
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238 RawChangeset rv = new RawChangeset();
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239 rv.init(data, 0, data.length, null);
157
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240 return rv;
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241 } catch (IOException ex) {
196
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242 throw new HgBadStateException(ex); // FIXME "Error reading changeset data"
157
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243 }
153
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244 }
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245
196
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246 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null
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247 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) {
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248 final int bufferEndIndex = offset + length;
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249 final byte lineBreak = (byte) '\n';
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250 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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251 if (breakIndex1 == -1) {
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252 throw new IllegalArgumentException("Bad Changeset data");
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253 }
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254 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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255 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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256 if (breakIndex2 == -1) {
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257 throw new IllegalArgumentException("Bad Changeset data");
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258 }
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259 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1);
196
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260 if (usersPool != null) {
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261 _user = usersPool.unify(_user);
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262 }
153
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263 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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264 if (breakIndex3 == -1) {
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265 throw new IllegalArgumentException("Bad Changeset data");
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266 }
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267 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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268 int space1 = _timeString.indexOf(' ');
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269 if (space1 == -1) {
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270 throw new IllegalArgumentException("Bad Changeset data");
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271 }
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272 int space2 = _timeString.indexOf(' ', space1 + 1);
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273 if (space2 == -1) {
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274 space2 = _timeString.length();
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275 }
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276 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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277 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
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278 // 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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279 // on commit and timezone is recorded to adjust it to UTC.
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280 Date _time = new Date(unixTime * 1000);
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281 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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282 Map<String, String> _extrasMap;
252
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283 final String extras_branch_key = "branch";
153
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284 if (_extras == null) {
252
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285 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
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286 } else {
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287 _extrasMap = new HashMap<String, String>();
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288 for (String pair : _extras.split("\00")) {
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289 int eq = pair.indexOf(':');
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290 // FIXME need to decode key/value, @see changelog.py:decodeextra
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291 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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292 }
252
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293 if (!_extrasMap.containsKey(extras_branch_key)) {
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294 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
153
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295 }
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296 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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297 }
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298
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299 //
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300 int lastStart = breakIndex3 + 1;
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301 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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302 ArrayList<String> _files = null;
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303 if (breakIndex4 > lastStart) {
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304 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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305 _files = new ArrayList<String>(5);
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306 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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307 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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308 lastStart = breakIndex4 + 1;
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309 if (data[breakIndex4 + 1] == lineBreak) {
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310 // found \n\n
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311 break;
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312 } else {
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313 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
129
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314 }
153
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315 }
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316 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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317 throw new IllegalArgumentException("Bad Changeset data");
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318 }
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319 } else {
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320 breakIndex4--;
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321 }
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322 String _comment;
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323 try {
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324 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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325 // FIXME respect ui.fallbackencoding and try to decode if set
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326 } catch (UnsupportedEncodingException ex) {
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327 _comment = "";
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328 throw new IllegalStateException("Could hardly happen");
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329 }
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330 // change this instance at once, don't leave it partially changes in case of error
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331 this.manifest = _nodeid;
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332 this.user = _user;
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333 this.time = _time;
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334 this.timezone = _timezone;
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335 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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336 this.comment = _comment;
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337 this.extras = _extrasMap;
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338 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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339
153
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340 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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341 for (int i = startOffset; i < endIndex; i++) {
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342 if (src[i] == what) {
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343 return i;
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344 }
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345 }
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346 return -1;
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347 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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348 }
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349
196
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350 private static class RawCsetCollector implements Inspector {
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351 final ArrayList<RawChangeset> result;
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352
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353 public RawCsetCollector(int count) {
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354 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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355 }
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356
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357 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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diff changeset
358 result.add(cset.clone());
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359 }
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360 }
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361
312
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362 private static class RawCsetParser implements RevlogStream.Inspector, Lifecycle {
196
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363
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364 private final Inspector inspector;
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365 private final Pool<String> usersPool;
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366 private final RawChangeset cset = new RawChangeset();
312
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367 private final ProgressSupport progressHelper;
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368 private IterateControlMediator iterateControl;
196
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369
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370 public RawCsetParser(HgChangelog.Inspector delegate) {
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371 assert delegate != null;
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372 inspector = delegate;
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diff changeset
373 usersPool = new Pool<String>();
312
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374 progressHelper = ProgressSupport.Factory.get(delegate);
196
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375 }
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376
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377 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
378 try {
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379 byte[] data = da.byteArray();
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380 cset.init(data, 0, data.length, usersPool);
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diff changeset
381 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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diff changeset
382 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
312
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diff changeset
383 progressHelper.worked(1);
196
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diff changeset
384 } catch (Exception ex) {
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385 throw new HgBadStateException(ex); // FIXME exception handling
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diff changeset
386 }
312
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diff changeset
387 if (iterateControl != null) {
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diff changeset
388 iterateControl.checkCancelled();
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diff changeset
389 }
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diff changeset
390 }
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diff changeset
391
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diff changeset
392 public void start(int count, Callback callback, Object token) {
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393 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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diff changeset
394 iterateControl = cs == null ? null : new IterateControlMediator(cs, callback);
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diff changeset
395 progressHelper.start(count);
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396 }
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 252
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397
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 252
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398 public void finish(Object token) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 252
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399 progressHelper.done();
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 182
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400 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 182
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401 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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402 }