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annotate src/org/tmatesoft/hg/repo/HgChangelog.java @ 678:8625cba0a5a8

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Towards better blame of merge revisions: refactor merge handling strategy
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Jul 2013 15:36:29 +0200
parents 545b1d4cc11d
children
rev   line source
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e929cecae4e1 Refactor to move revlog content to base class
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1 /*
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2 * Copyright (c) 2010-2013 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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a3a2e5deb320 Updated contact address to support@hg4j.com
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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.util.ArrayList;
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21 import java.util.Arrays;
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22 import java.util.Calendar;
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23 import java.util.Date;
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24 import java.util.Formatter;
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25 import java.util.List;
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26 import java.util.Locale;
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27 import java.util.Map;
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28 import java.util.TimeZone;
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29
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30 import org.tmatesoft.hg.core.Nodeid;
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31 import org.tmatesoft.hg.core.SessionContext;
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32 import org.tmatesoft.hg.internal.Callback;
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33 import org.tmatesoft.hg.internal.ChangesetParser;
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34 import org.tmatesoft.hg.internal.DataAccess;
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35 import org.tmatesoft.hg.internal.Lifecycle;
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36 import org.tmatesoft.hg.internal.LifecycleBridge;
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37 import org.tmatesoft.hg.internal.RevlogStream;
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38 import org.tmatesoft.hg.util.Adaptable;
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39 import org.tmatesoft.hg.util.CancelSupport;
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40 import org.tmatesoft.hg.util.ProgressSupport;
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41
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42 /**
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43 * Representation of the Mercurial changelog file (list of ChangeSets)
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44 *
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 public final class HgChangelog extends Revlog {
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49
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50 /* package-local */HgChangelog(HgRepository hgRepo, RevlogStream content) {
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51 super(hgRepo, content, true);
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52 }
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53
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54 /**
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55 * Iterate over whole changelog
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56 * @param inspector callback to process entries
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57 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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58 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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59 */
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60 public void all(final HgChangelog.Inspector inspector) throws HgRuntimeException {
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61 range(0, getLastRevision(), inspector);
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62 }
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64 /**
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65 * Iterate over changelog part
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66 * @param start first changelog entry to process
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67 * @param end last changelog entry to process
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68 * @param inspector callback to process entries
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69 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog. <em>Runtime exception</em>
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70 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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71 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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72 */
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73 public void range(int start, int end, final HgChangelog.Inspector inspector) throws HgRuntimeException {
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74 if (inspector == null) {
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75 throw new IllegalArgumentException();
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76 }
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77 content.iterate(start, end, true, new RawCsetParser(getRepo(), inspector));
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78 }
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80 /**
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81 * @see #range(int, int, Inspector)
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82 * @return changeset entry objects, never <code>null</code>
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83 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog. <em>Runtime exception</em>
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84 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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85 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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86 */
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87 public List<RawChangeset> range(int start, int end) throws HgRuntimeException {
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88 final RawCsetCollector c = new RawCsetCollector(end - start + 1);
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89 range(start, end, c);
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90 return c.result;
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91 }
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93 /**
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94 * Access individual revisions. Note, regardless of supplied revision order, inspector gets
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95 * changesets strictly in the order they are in the changelog.
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96 * @param inspector callback to get changesets
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97 * @param revisions revisions to read, unrestricted ordering.
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98 * @throws HgInvalidRevisionException if any supplied revision doesn't identify revision from this revlog <em>Runtime exception</em>
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99 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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100 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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101 */
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102 public void range(final HgChangelog.Inspector inspector, final int... revisions) throws HgRuntimeException {
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103 Arrays.sort(revisions);
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104 rangeInternal(inspector, revisions);
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105 }
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106
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107 /**
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108 * Friends-only version of {@link #range(Inspector, int...)}, when callers know array is sorted
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109 */
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110 /*package-local*/ void rangeInternal(HgChangelog.Inspector inspector, int[] sortedRevisions) throws HgRuntimeException {
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111 if (sortedRevisions == null || sortedRevisions.length == 0) {
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112 return;
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113 }
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114 if (inspector == null) {
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115 throw new IllegalArgumentException();
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116 }
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117 content.iterate(sortedRevisions, true, new RawCsetParser(getRepo(), inspector));
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118 }
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119
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120 /**
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121 * Get changeset entry object
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122 * @throws HgInvalidRevisionException if supplied nodeid doesn't identify any revision from this revlog. <em>Runtime exception</em>
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123 * @throws HgInvalidControlFileException if failed to access revlog index/data entry. <em>Runtime exception</em>
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124 * @throws HgRuntimeException subclass thereof to indicate other issues with the library. <em>Runtime exception</em>
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125 */
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126 public RawChangeset changeset(Nodeid nid) throws HgRuntimeException {
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127 int x = getRevisionIndex(nid);
236
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128 return range(x, x).get(0);
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129 }
129
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130
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131 @Callback
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132 public interface Inspector {
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133 /**
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134 * Access next changeset
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135 * TODO describe what revisionNumber is when Inspector is used with HgBundle (BAD_REVISION or bundle's local order?)
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136 *
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137 * @param revisionIndex index of revision being inspected, local to the inspected object
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138 * @param nodeid revision being inspected
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139 * @param cset changeset raw data
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140 */
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141 void next(int revisionIndex, Nodeid nodeid, RawChangeset cset) throws HgRuntimeException;
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142 }
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143
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144 /**
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145 * Entry in the Changelog
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146 */
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147 public static final class RawChangeset implements Cloneable /* for those that would like to keep a copy */{
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148 // would be nice to get it immutable, but then we can't reuse instances
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149 /* final */Nodeid manifest;
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150 String user;
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151 String comment;
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152 String[] files; // shall not be modified (#clone() does shallow copy)
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153 Date time;
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154 int timezone;
161
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155 // http://mercurial.selenic.com/wiki/PruningDeadBranches - Closing changesets can be identified by close=1 in the changeset's extra field.
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156 Map<String, String> extras;
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157
154
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158 private RawChangeset() {
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159 }
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160
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161 public Nodeid manifest() {
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162 return manifest;
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163 }
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164
153
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165 public String user() {
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166 return user;
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167 }
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168
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169 public String comment() {
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170 return comment;
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171 }
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172
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173 public List<String> files() {
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174 return Arrays.asList(files);
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175 }
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176
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177 public Date date() {
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178 return time;
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179 }
211
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180
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181 /**
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182 * @return time zone value, as is, positive for Western Hemisphere.
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183 */
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184 public int timezone() {
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185 return timezone;
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186 }
153
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187
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188 public String dateString() {
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189 // XXX keep once formatted? Perhaps, there's faster way to set up calendar/time zone?
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190 StringBuilder sb = new StringBuilder(30);
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191 Formatter f = new Formatter(sb, Locale.US);
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192 TimeZone tz = TimeZone.getTimeZone(TimeZone.getAvailableIDs(timezone * 1000)[0]);
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193 // apparently timezone field records number of seconds time differs from UTC,
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194 // i.e. value to substract from time to get UTC time. Calendar seems to add
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195 // timezone offset to UTC, instead, hence sign change.
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196 // tz.setRawOffset(timezone * -1000);
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197 Calendar c = Calendar.getInstance(tz, Locale.US);
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198 c.setTime(time);
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199 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", c);
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200 return sb.toString();
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201 }
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202
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203 public Map<String, String> extras() {
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204 return extras;
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205 }
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206
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207 public String branch() {
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208 return extras.get("branch");
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209 }
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210
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211 @Override
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212 public String toString() {
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213 StringBuilder sb = new StringBuilder();
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214 sb.append("Changeset {");
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215 sb.append("User: ").append(user).append(", ");
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216 sb.append("Comment: ").append(comment).append(", ");
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217 sb.append("Manifest: ").append(manifest).append(", ");
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218 sb.append("Date: ").append(time).append(", ");
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219 sb.append("Files: ").append(files.length);
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220 for (String s : files) {
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221 sb.append(", ").append(s);
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222 }
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223 if (extras != null) {
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224 sb.append(", Extra: ").append(extras);
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225 }
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226 sb.append("}");
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227 return sb.toString();
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228 }
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229
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230 @Override
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231 public RawChangeset clone() {
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232 try {
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233 return (RawChangeset) super.clone();
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234 } catch (CloneNotSupportedException ex) {
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235 throw new InternalError(ex.toString());
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236 }
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237 }
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238 }
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239
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240 /*package-local*/static final class RawCsetFactory implements ChangesetParser.CsetFactory {
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241 private RawChangeset cset;
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242
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243 public RawCsetFactory(boolean shallReuseCsetInstance) {
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244 if (shallReuseCsetInstance) {
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245 cset = new RawChangeset();
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246 }
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247 }
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248
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249 public RawChangeset create(Nodeid nodeidManifest, String user, Date time, int timezone, List<String> files, String comment, Map<String, String> extrasMap) {
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250 RawChangeset target;
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251 if (cset != null) {
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252 target = cset;
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253 } else {
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254 target = new RawChangeset();
153
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255 }
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256 target.manifest = nodeidManifest;
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257 target.user = user;
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258 target.time = time;
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259 target.timezone = timezone;
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260 target.files = files == null ? new String[0] : files.toArray(new String[files.size()]);
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261 target.comment = comment;
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262 target.extras = extrasMap;
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263 return target;
363
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264 }
129
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265 }
673
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266
196
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267 private static class RawCsetCollector implements Inspector {
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268 final ArrayList<RawChangeset> result;
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269
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270 public RawCsetCollector(int count) {
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271 result = new ArrayList<RawChangeset>(count > 0 ? count : 5);
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272 }
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273
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274 public void next(int revisionNumber, Nodeid nodeid, RawChangeset cset) {
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275 result.add(cset.clone());
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276 }
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277 }
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278
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279 private static final class RawCsetParser implements RevlogStream.Inspector, Adaptable, Lifecycle {
196
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280
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281 private final Inspector inspector;
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282 private final ChangesetParser csetBuilder;
520
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283 // non-null when inspector uses high-level lifecycle entities (progress and/or cancel supports)
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284 private final LifecycleBridge lifecycleStub;
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285 // non-null when inspector relies on low-level lifecycle and is responsible
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286 // to proceed any possible high-level entities himself.
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287 private final Lifecycle inspectorLifecycle;
196
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288
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289 public RawCsetParser(SessionContext.Source sessionContext, HgChangelog.Inspector delegate) {
196
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290 assert delegate != null;
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291 inspector = delegate;
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292 csetBuilder = new ChangesetParser(sessionContext, new RawCsetFactory(true));
520
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293 inspectorLifecycle = Adaptable.Factory.getAdapter(delegate, Lifecycle.class, null);
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294 if (inspectorLifecycle == null) {
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295 ProgressSupport ph = Adaptable.Factory.getAdapter(delegate, ProgressSupport.class, null);
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296 CancelSupport cs = Adaptable.Factory.getAdapter(delegate, CancelSupport.class, null);
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297 if (cs != null || ph != null) {
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298 lifecycleStub = new LifecycleBridge(ph, cs);
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299 } else {
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300 lifecycleStub = null;
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301 }
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302 } else {
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303 lifecycleStub = null;
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304 }
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305 }
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306
628
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307 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) throws HgRuntimeException {
196
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308 try {
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309 RawChangeset cset = csetBuilder.parse(da);
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310 // XXX there's no guarantee for Changeset.Callback that distinct instance comes each time, consider instance reuse
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311 inspector.next(revisionNumber, Nodeid.fromBinary(nodeid, 0), cset);
520
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312 if (lifecycleStub != null) {
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313 lifecycleStub.nextStep();
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314 }
427
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315 } catch (HgInvalidDataFormatException ex) {
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316 throw ex.setRevisionIndex(revisionNumber);
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
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317 } catch (IOException ex) {
423
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318 // XXX need better exception, perhaps smth like HgChangelogException (extends HgInvalidControlFileException)
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319 throw new HgInvalidControlFileException("Failed reading changelog", ex, null).setRevisionIndex(revisionNumber);
196
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320 }
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321 }
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322
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323 public <T> T getAdapter(Class<T> adapterClass) {
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324 if (adapterClass == Lifecycle.class) {
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325 return adapterClass.cast(this);
312
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326 }
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327 // XXX what if caller takes Progress/Cancel (which we update through lifecycleStub, too)
520
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328 return Adaptable.Factory.getAdapter(inspector, adapterClass, null);
312
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329 }
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330
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331 public void start(int count, Callback callback, Object token) {
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332 if (inspectorLifecycle != null) {
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333 inspectorLifecycle.start(count, callback, token);
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334 } else if (lifecycleStub != null) {
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335 lifecycleStub.start(count, callback, token);
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336 }
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337 }
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338
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339 public void finish(Object token) {
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340 if (inspectorLifecycle != null) {
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341 inspectorLifecycle.finish(token);
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342 } else if (lifecycleStub != null) {
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343 lifecycleStub.finish(token);
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344 }
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345 csetBuilder.dispose();
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346 }
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347
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348 }
0
dbd663faec1f Basic changelog parsing
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349 }