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annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 575:8bf184c9d733

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Issue 43: poor performance with InflaterDataAccess. Phase 1: test existing code, fix defects found
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Apr 2013 16:59:59 +0200
parents 1ee452f31187
children c18095eedde0
rev   line source
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1 /*
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2 * Copyright (c) 2010-2012 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.Collections;
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25 import java.util.Date;
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26 import java.util.Formatter;
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27 import java.util.HashMap;
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28 import java.util.List;
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29 import java.util.Locale;
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30 import java.util.Map;
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31 import java.util.TimeZone;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.internal.Callback;
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35 import org.tmatesoft.hg.internal.DataAccess;
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36 import org.tmatesoft.hg.internal.Lifecycle;
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37 import org.tmatesoft.hg.internal.LifecycleBridge;
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38 import org.tmatesoft.hg.internal.Pool;
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39 import org.tmatesoft.hg.internal.RevlogStream;
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40 import org.tmatesoft.hg.util.Adaptable;
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41 import org.tmatesoft.hg.util.CancelSupport;
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42 import org.tmatesoft.hg.util.ProgressSupport;
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44 /**
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45 * Representation of the Mercurial changelog file (list of ChangeSets)
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46 *
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47 * @author Artem Tikhomirov
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48 * @author TMate Software Ltd.
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49 */
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50 public final class HgChangelog extends Revlog {
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51
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52 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) {
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53 super(hgRepo, content);
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54 }
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56 public void all(final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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57 range(0, getLastRevision(), inspector);
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58 }
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60 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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61 if (inspector == null) {
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62 throw new IllegalArgumentException();
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63 }
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64 content.iterate(start, end, true, new RawCsetParser(inspector));
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65 }
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67 public List<RawChangeset> range(int start, int end) throws HgInvalidRevisionException, HgInvalidControlFileException {
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68 final RawCsetCollector c = new RawCsetCollector(end - start + 1);
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69 range(start, end, c);
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70 return c.result;
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71 }
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73 /**
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74 * Access individual revisions. Note, regardless of supplied revision order, inspector gets
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75 * changesets strictly in the order they are in the changelog.
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76 * @param inspector callback to get changesets
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77 * @param revisions revisions to read, unrestricted ordering.
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78 */
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79 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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80 Arrays.sort(revisions);
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81 rangeInternal(inspector, revisions);
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82 }
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84 /**
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85 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted
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86 */
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87 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgInvalidRevisionException, HgInvalidControlFileException {
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88 if (sortedRevisions == null || sortedRevisions.length == 0) {
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89 return;
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90 }
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91 if (inspector == null) {
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92 throw new IllegalArgumentException();
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93 }
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94 content.iterate(sortedRevisions, true, new RawCsetParser(inspector));
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95 }
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97 /**
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98 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog
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99 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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100 */
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101 public RawChangeset changeset(Nodeid nid) throws HgInvalidControlFileException, HgInvalidRevisionException {
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102 int x = getRevisionIndex(nid);
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103 return range(x, x).get(0);
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104 }
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105
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106 @Callback
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107 public interface Inspector {
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108 /**
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109 * Access next changeset
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110 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?)
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111 *
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112 * @param revisionIndex index of revision being inspected, local to the inspected object
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113 * @param nodeid revision being inspected
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114 * @param cset changeset raw data
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115 */
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116 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset);
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117 }
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119 /**
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120 * Entry in the Changelog
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121 */
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122 public static class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
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123 // TODO immutable
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124 private/* final */Nodeid manifest;
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125 private String user;
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126 private String comment;
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127 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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128 private Date time;
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129 private int timezone;
161
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130 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
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131 private Map<String, String> extras;
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132
153
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133 /**
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134 * @see mercurial/changelog.py:read()
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135 *
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136 * <pre>
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137 * format used:
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138 * nodeid\n : manifest node in ascii
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139 * user\n : user, no \n or \r allowed
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140 * time tz extra\n : date (time is int or float, timezone is int)
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141 * : extra is metadatas, encoded and separated by '\0'
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142 * : older versions ignore it
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143 * files\n\n : files modified by the cset, no \n or \r allowed
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144 * (.*) : comment (free text, ideally utf-8)
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145 *
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146 * changelog v0 doesn't use extra
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147 * </pre>
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148 */
154
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149 private RawChangeset() {
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150 }
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151
153
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152 public Nodeid manifest() {
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153 return manifest;
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154 }
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155
153
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156 public String user() {
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157 return user;
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158 }
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159
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160 public String comment() {
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161 return comment;
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162 }
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163
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164 public List<String> files() {
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165 return files;
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166 }
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167
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168 public Date date() {
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169 return time;
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170 }
211
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171
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172 /**
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173 * @return time zone value, as is, positive for Western Hemisphere.
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174 */
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175 public int timezone() {
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176 return timezone;
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177 }
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178
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179 public String dateString() {
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180 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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181 StringBuilder sb = new StringBuilder(30);
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182 Formatter f = new Formatter(sb, Locale.US);
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183 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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184 // apparently timezone field records number of seconds time differs from UTC,
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185 // i.e. value to substract from time to get UTC time. Calendar seems to add
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186 // timezone offset to UTC, instead, hence sign change.
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187 // tz.setRawOffset(timezone * -1000);
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188 Calendar c = Calendar.getInstance(tz, Locale.US);
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189 c.setTime(time);
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190 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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191 return sb.toString();
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192 }
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193
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194 public Map<String, String> extras() {
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195 return extras;
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196 }
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197
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198 public String branch() {
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199 return extras.get("branch");
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200 }
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201
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202 @Override
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203 public String toString() {
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204 StringBuilder sb = new StringBuilder();
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205 sb.append("Changeset {");
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206 sb.append("User: ").append(user).append(", ");
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207 sb.append("Comment: ").append(comment).append(", ");
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208 sb.append("Manifest: ").append(manifest).append(", ");
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209 sb.append("Date: ").append(time).append(", ");
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210 sb.append("Files: ").append(files.size());
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211 for (String s : files) {
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212 sb.append(", ").append(s);
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213 }
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214 if (extras != null) {
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215 sb.append(", Extra: ").append(extras);
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216 }
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217 sb.append("}");
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218 return sb.toString();
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219 }
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220
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221 @Override
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222 public RawChangeset clone() {
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223 try {
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224 return (RawChangeset) super.clone();
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225 } catch (CloneNotSupportedException ex) {
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226 throw new InternalError(ex.toString());
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227 }
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228 }
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229
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230 /*package*/ static RawChangeset parse(DataAccess da) throws IOException, HgInvalidDataFormatException {
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231 byte[] data = da.byteArray();
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232 RawChangeset rv = new RawChangeset();
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233 rv.init(data, 0, data.length, null);
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234 return rv;
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235 }
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236
196
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237 // @param usersPool - it's likely user names get repeated again and again throughout repository. can be null
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238 /* package-local */void init(byte[] data, int offset, int length, Pool<String> usersPool) throws HgInvalidDataFormatException {
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239 final int bufferEndIndex = offset + length;
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240 final byte lineBreak = (byte) '\n';
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241 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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242 if (breakIndex1 == -1) {
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243 throw new HgInvalidDataFormatException("Bad Changeset data");
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244 }
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245 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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246 int breakIndex2 = indexOf(data, lineBreak, breakIndex1 + 1, bufferEndIndex);
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247 if (breakIndex2 == -1) {
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248 throw new HgInvalidDataFormatException("Bad Changeset data");
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249 }
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250 String _user = new String(data, breakIndex1 + 1, breakIndex2 - breakIndex1 - 1);
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251 if (usersPool != null) {
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252 _user = usersPool.unify(_user);
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253 }
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254 int breakIndex3 = indexOf(data, lineBreak, breakIndex2 + 1, bufferEndIndex);
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255 if (breakIndex3 == -1) {
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256 throw new HgInvalidDataFormatException("Bad Changeset data");
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257 }
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258 String _timeString = new String(data, breakIndex2 + 1, breakIndex3 - breakIndex2 - 1);
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259 int space1 = _timeString.indexOf(' ');
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260 if (space1 == -1) {
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261 throw new HgInvalidDataFormatException(String.format("Bad Changeset data: %s in [%d..%d]", "time string", breakIndex2+1, breakIndex3));
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262 }
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263 int space2 = _timeString.indexOf(' ', space1 + 1);
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264 if (space2 == -1) {
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265 space2 = _timeString.length();
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266 }
363
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267 long unixTime = Long.parseLong(_timeString.substring(0, space1));
153
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268 int _timezone = Integer.parseInt(_timeString.substring(space1 + 1, space2));
363
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269 // unixTime is local time, and timezone records difference of the local time to UTC.
153
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270 Date _time = new Date(unixTime * 1000);
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271 String _extras = space2 < _timeString.length() ? _timeString.substring(space2 + 1) : null;
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272 Map<String, String> _extrasMap;
252
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273 final String extras_branch_key = "branch";
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274 if (_extras == null || _extras.trim().length() == 0) {
252
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275 _extrasMap = Collections.singletonMap(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
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276 } else {
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277 _extrasMap = new HashMap<String, String>();
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278 for (String pair : _extras.split("\00")) {
363
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279 pair = decode(pair);
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280 int eq = pair.indexOf(':');
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281 _extrasMap.put(pair.substring(0, eq), pair.substring(eq + 1));
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282 }
252
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283 if (!_extrasMap.containsKey(extras_branch_key)) {
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284 _extrasMap.put(extras_branch_key, HgRepository.DEFAULT_BRANCH_NAME);
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285 }
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286 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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287 }
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288
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289 //
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290 int lastStart = breakIndex3 + 1;
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291 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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292 ArrayList<String> _files = null;
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293 if (breakIndex4 > lastStart) {
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294 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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295 _files = new ArrayList<String>(5);
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296 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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297 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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298 lastStart = breakIndex4 + 1;
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299 if (data[breakIndex4 + 1] == lineBreak) {
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300 // found \n\n
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301 break;
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302 } else {
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303 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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304 }
153
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305 }
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306 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
427
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307 throw new HgInvalidDataFormatException("Bad Changeset data");
153
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308 }
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309 } else {
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310 breakIndex4--;
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311 }
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312 String _comment;
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313 try {
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314 _comment = new String(data, breakIndex4 + 2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
418
528b6780a8bd A bit of FIXME cleanup (mostly degraded to TODO post 1.0), comments and javadoc
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315 // TODO post-1.0 respect ui.fallbackencoding and try to decode if set; use EncodingHelper
153
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316 } catch (UnsupportedEncodingException ex) {
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317 _comment = "";
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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318 // Could hardly happen
427
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319 throw new HgInvalidDataFormatException("Bad Changeset data", ex);
153
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320 }
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321 // change this instance at once, don't leave it partially changes in case of error
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322 this.manifest = _nodeid;
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323 this.user = _user;
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324 this.time = _time;
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325 this.timezone = _timezone;
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326 this.files = _files == null ? Collections.<String> emptyList() : Collections.unmodifiableList(_files);
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327 this.comment = _comment;
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328 this.extras = _extrasMap;
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329 }
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645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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330
153
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331 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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332 for (int i = startOffset; i < endIndex; i++) {
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333 if (src[i] == what) {
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334 return i;
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335 }
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336 }
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337 return -1;
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338 }
363
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339
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340 private static String decode(String s) {
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341 if (s != null && s.indexOf('\\') != -1) {
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diff changeset
342 // TestAuxUtilities#testChangelogExtrasDecode
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diff changeset
343 return s.replace("\\\\", "\\").replace("\\n", "\n").replace("\\r", "\r").replace("\\0", "\00");
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344 }
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345 return s;
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diff changeset
346 }
129
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
347 }
645829962785 core.Cset renamed to HgChangeset; repo.Changeset moved into HgChangelog
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diff changeset
348
196
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diff changeset
349 private static class RawCsetCollector implements Inspector {
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diff changeset
350 final ArrayList<RawChangeset> result;
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351
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352 public RawCsetCollector(int count) {
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diff changeset
353 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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354 }
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355
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356 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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diff changeset
357 result.add(cset.clone());
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358 }
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359 }
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360
520
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diff changeset
361 private static class RawCsetParser implements RevlogStream.Inspector, Adaptable {
196
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diff changeset
362
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diff changeset
363 private final Inspector inspector;
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364 private final Pool<String> usersPool;
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diff changeset
365 private final RawChangeset cset = new RawChangeset();
520
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diff changeset
366 // non-null when inspector uses high-level lifecycle entities (progress and/or cancel supports)
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diff changeset
367 private final LifecycleBridge lifecycleStub;
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diff changeset
368 // non-null when inspector relies on low-level lifecycle and is responsible
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diff changeset
369 // to proceed any possible high-level entities himself.
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diff changeset
370 private final Lifecycle inspectorLifecycle;
196
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371
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diff changeset
372 public RawCsetParser(HgChangelog.Inspector delegate) {
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diff changeset
373 assert delegate != null;
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374 inspector = delegate;
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diff changeset
375 usersPool = new Pool<String>();
520
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diff changeset
376 inspectorLifecycle = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null);
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diff changeset
377 if (inspectorLifecycle == null) {
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diff changeset
378 ProgressSupport ph = Adaptable.Factory.getAdapter(delegate, ProgressSupport.class, null);
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diff changeset
379 CancelSupport cs = Adaptable.Factory.getAdapter(delegate, CancelSupport.class, null);
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diff changeset
380 if (cs != null || ph != null) {
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diff changeset
381 lifecycleStub = new LifecycleBridge(ph, cs);
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diff changeset
382 } else {
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diff changeset
383 lifecycleStub = null;
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diff changeset
384 }
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diff changeset
385 } else {
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diff changeset
386 lifecycleStub = null;
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diff changeset
387 }
196
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388 }
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389
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390 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
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391 try {
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392 byte[] data = da.byteArray();
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393 cset.init(data, 0, data.length, usersPool);
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394 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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395 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
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396 if (lifecycleStub != null) {
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397 lifecycleStub.nextStep();
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398 }
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399 } catch (HgInvalidDataFormatException ex) {
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400 throw ex.setRevisionIndex(revisionNumber);
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401 } catch (IOException ex) {
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402 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException)
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403 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber);
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404 }
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405 }
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406
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407 public <T> T getAdapter(Class<T> adapterClass) {
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408 if (adapterClass == Lifecycle.class) {
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409 if (inspectorLifecycle != null) {
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410 return adapterClass.cast(inspectorLifecycle);
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411 }
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412 // reveal interest in lifecycle only when either progress or cancel support is there
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413 // and inspector itself doesn't respond to lifecycle request
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414 // lifecycleStub may still be null here (no progress and cancel), it's ok to cast(null)
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415 return adapterClass.cast(lifecycleStub);
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416
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417 }
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418 return Adaptable.Factory.getAdapter(inspector, adapterClass, null);
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419 }
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420
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421 }
0
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422 }