Mercurial > jhg
annotate src/org/tmatesoft/hg/repo/HgDataFile.java @ 351:5abba41751e6
Read extra predefined locations with mercurial configuration files
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Wed, 30 Nov 2011 04:39:50 +0100 |
parents | 8da7ade36c57 |
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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 static org.tmatesoft.hg.repo.HgInternals.wrongLocalRevision; |
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20 import static org.tmatesoft.hg.repo.HgRepository.*; |
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21 |
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22 import java.io.ByteArrayOutputStream; |
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23 import java.io.File; |
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24 import java.io.FileInputStream; |
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25 import java.io.IOException; |
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26 import java.nio.ByteBuffer; |
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27 import java.nio.channels.FileChannel; |
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28 import java.util.ArrayList; |
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29 import java.util.Arrays; |
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30 import java.util.Collection; |
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31 import java.util.Collections; |
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32 import java.util.List; |
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33 |
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34 import org.tmatesoft.hg.core.HgDataStreamException; |
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35 import org.tmatesoft.hg.core.HgException; |
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36 import org.tmatesoft.hg.core.HgInvalidRevisionException; |
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37 import org.tmatesoft.hg.core.HgLogCommand; |
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38 import org.tmatesoft.hg.core.Nodeid; |
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39 import org.tmatesoft.hg.internal.DataAccess; |
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40 import org.tmatesoft.hg.internal.FilterByteChannel; |
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41 import org.tmatesoft.hg.internal.FilterDataAccess; |
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42 import org.tmatesoft.hg.internal.IntMap; |
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43 import org.tmatesoft.hg.internal.RevlogStream; |
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44 import org.tmatesoft.hg.util.ByteChannel; |
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45 import org.tmatesoft.hg.util.CancelSupport; |
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46 import org.tmatesoft.hg.util.CancelledException; |
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47 import org.tmatesoft.hg.util.Pair; |
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48 import org.tmatesoft.hg.util.Path; |
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49 import org.tmatesoft.hg.util.ProgressSupport; |
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50 |
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51 |
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52 |
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53 /** |
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54 * ? name:HgFileNode? |
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55 * |
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56 * @author Artem Tikhomirov |
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57 * @author TMate Software Ltd. |
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58 */ |
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59 public class HgDataFile extends Revlog { |
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60 |
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61 // absolute from repo root? |
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62 // slashes, unix-style? |
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63 // repo location agnostic, just to give info to user, not to access real storage |
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64 private final Path path; |
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65 private Metadata metadata; // get initialized on first access to file content. |
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66 |
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67 /*package-local*/HgDataFile(HgRepository hgRepo, Path filePath, RevlogStream content) { |
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68 super(hgRepo, content); |
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69 path = filePath; |
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70 } |
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71 |
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72 /*package-local*/HgDataFile(HgRepository hgRepo, Path filePath) { |
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73 super(hgRepo); |
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74 path = filePath; |
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75 } |
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76 |
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77 // exists is not the best name possible. now it means no file with such name was ever known to the repo. |
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78 // it might be confused with files existed before but lately removed. |
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79 public boolean exists() { |
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80 return content != null; // XXX need better impl |
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81 } |
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82 |
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83 // human-readable (i.e. "COPYING", not "store/data/_c_o_p_y_i_n_g.i") |
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84 public Path getPath() { |
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85 return path; // hgRepo.backresolve(this) -> name? In this case, what about hashed long names? |
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86 } |
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87 |
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88 /** |
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89 * @return size of the file content at the given revision |
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90 */ |
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91 public int length(Nodeid nodeid) throws HgDataStreamException { |
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92 return length(getLocalRevision(nodeid)); |
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93 |
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94 } |
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95 |
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96 /** |
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97 * @return size of the file content at the revision identified by local revision number. |
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98 */ |
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99 public int length(int localRev) throws HgDataStreamException { |
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100 if (metadata == null || !metadata.checked(localRev)) { |
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101 checkAndRecordMetadata(localRev); |
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102 } |
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103 final int dataLen = content.dataLength(localRev); |
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104 if (metadata.known(localRev)) { |
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105 return dataLen - metadata.dataOffset(localRev); |
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106 } |
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107 return dataLen; |
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108 } |
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109 |
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110 /** |
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111 * Reads content of the file from working directory. If file present in the working directory, its actual content without |
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112 * any filters is supplied through the sink. If file does not exist in the working dir, this method provides content of a file |
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113 * as if it would be refreshed in the working copy, i.e. its corresponding revision |
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114 * (XXX according to dirstate? file tip?) is read from the repository, and filters repo -> working copy get applied. |
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115 * |
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116 * @param sink where to pipe content to |
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117 * @throws HgDataStreamException to indicate troubles reading repository file |
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118 * @throws CancelledException if operation was cancelled |
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119 */ |
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120 public void workingCopy(ByteChannel sink) throws HgDataStreamException, CancelledException { |
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121 File f = getRepo().getFile(this); |
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122 if (f.exists()) { |
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123 final CancelSupport cs = CancelSupport.Factory.get(sink); |
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124 final ProgressSupport progress = ProgressSupport.Factory.get(sink); |
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125 final long flength = f.length(); |
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126 final int bsize = (int) Math.min(flength, 32*1024); |
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127 progress.start((int) (flength > Integer.MAX_VALUE ? flength >>> 15 /*32 kb buf size*/ : flength)); |
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128 ByteBuffer buf = ByteBuffer.allocate(bsize); |
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129 FileChannel fc = null; |
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130 try { |
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131 fc = new FileInputStream(f).getChannel(); |
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132 while (fc.read(buf) != -1) { |
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133 cs.checkCancelled(); |
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134 buf.flip(); |
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135 int consumed = sink.write(buf); |
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136 progress.worked(flength > Integer.MAX_VALUE ? 1 : consumed); |
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137 buf.compact(); |
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138 } |
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139 } catch (IOException ex) { |
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140 throw new HgDataStreamException(getPath(), ex); |
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141 } finally { |
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142 progress.done(); |
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143 if (fc != null) { |
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144 try { |
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145 fc.close(); |
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146 } catch (IOException ex) { |
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147 getRepo().getContext().getLog().info(getClass(), ex, null); |
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148 } |
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149 } |
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150 } |
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151 } else { |
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152 contentWithFilters(TIP, sink); |
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153 } |
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154 } |
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155 |
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156 // public void content(int revision, ByteChannel sink, boolean applyFilters) throws HgDataStreamException, IOException, CancelledException { |
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157 // byte[] content = content(revision); |
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158 // final CancelSupport cancelSupport = CancelSupport.Factory.get(sink); |
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159 // final ProgressSupport progressSupport = ProgressSupport.Factory.get(sink); |
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160 // ByteBuffer buf = ByteBuffer.allocate(512); |
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161 // int left = content.length; |
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162 // progressSupport.start(left); |
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163 // int offset = 0; |
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164 // cancelSupport.checkCancelled(); |
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165 // ByteChannel _sink = applyFilters ? new FilterByteChannel(sink, getRepo().getFiltersFromRepoToWorkingDir(getPath())) : sink; |
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166 // do { |
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167 // buf.put(content, offset, Math.min(left, buf.remaining())); |
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168 // buf.flip(); |
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169 // cancelSupport.checkCancelled(); |
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170 // // XXX I may not rely on returned number of bytes but track change in buf position instead. |
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171 // int consumed = _sink.write(buf); |
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172 // buf.compact(); |
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173 // offset += consumed; |
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174 // left -= consumed; |
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175 // progressSupport.worked(consumed); |
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176 // } while (left > 0); |
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177 // progressSupport.done(); // XXX shall specify whether #done() is invoked always or only if completed successfully. |
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178 // } |
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179 |
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180 /*XXX not sure distinct method contentWithFilters() is the best way to do, perhaps, callers shall add filters themselves?*/ |
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181 public void contentWithFilters(int revision, ByteChannel sink) throws HgDataStreamException, CancelledException, HgInvalidRevisionException { |
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182 if (revision == WORKING_COPY) { |
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183 workingCopy(sink); // pass un-mangled sink |
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184 } else { |
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185 content(revision, new FilterByteChannel(sink, getRepo().getFiltersFromRepoToWorkingDir(getPath()))); |
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186 } |
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187 } |
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188 |
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189 // for data files need to check heading of the file content for possible metadata |
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190 // @see http://mercurial.selenic.com/wiki/FileFormats#data.2BAC8- |
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191 public void content(int revision, ByteChannel sink) throws HgDataStreamException, CancelledException, HgInvalidRevisionException { |
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192 if (revision == TIP) { |
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193 revision = getLastRevision(); |
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194 } |
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195 if (revision == WORKING_COPY) { |
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196 // sink is supposed to come into workingCopy without filters |
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197 // thus we shall not get here (into #content) from #contentWithFilters(WC) |
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198 workingCopy(sink); |
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199 return; |
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200 } |
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201 if (wrongLocalRevision(revision) || revision == BAD_REVISION) { |
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202 throw new HgInvalidRevisionException(revision); |
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203 } |
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204 if (sink == null) { |
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205 throw new IllegalArgumentException(); |
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206 } |
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207 if (metadata == null) { |
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208 metadata = new Metadata(); |
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209 } |
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210 ErrorHandlingInspector insp; |
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211 if (metadata.none(revision)) { |
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212 insp = new ContentPipe(sink, 0); |
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213 } else if (metadata.known(revision)) { |
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214 insp = new ContentPipe(sink, metadata.dataOffset(revision)); |
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215 } else { |
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216 // do not know if there's metadata |
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217 insp = new MetadataInspector(metadata, getPath(), new ContentPipe(sink, 0)); |
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218 } |
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219 insp.checkCancelled(); |
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220 super.content.iterate(revision, revision, true, insp); |
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221 try { |
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222 insp.checkFailed(); // XXX is there real need to throw IOException from ContentPipe? |
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223 } catch (HgDataStreamException ex) { |
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224 throw ex; |
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225 } catch (IOException ex) { |
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226 throw new HgDataStreamException(getPath(), ex).setRevisionNumber(revision); |
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227 } catch (HgException ex) { |
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228 // shall not happen, unless we changed ContentPipe or its subclass |
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229 throw new HgDataStreamException(getPath(), ex.getClass().getName(), ex); |
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230 } |
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231 } |
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232 |
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233 private static class HistoryNode { |
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234 int changeset; |
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235 Nodeid cset; |
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236 HistoryNode parent1, parent2; |
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237 List<HistoryNode> children; |
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238 |
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239 HistoryNode(int cs, HistoryNode p1, HistoryNode p2) { |
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240 changeset = cs; |
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241 parent1 = p1; |
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242 parent2 = p2; |
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243 if (p1 != null) { |
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244 p1.addChild(this); |
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245 } |
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246 if (p2 != null) { |
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247 p2.addChild(this); |
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248 } |
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249 } |
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250 |
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251 Nodeid changesetRevision() { |
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252 assert cset != null : "we initialize all csets prior to use"; |
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253 return cset; |
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254 } |
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255 |
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256 void addChild(HistoryNode child) { |
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257 if (children == null) { |
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258 children = new ArrayList<HistoryNode>(2); |
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259 } |
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260 children.add(child); |
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261 } |
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262 } |
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263 |
328
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264 /** |
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265 * @deprecated use {@link HgLogCommand#execute(org.tmatesoft.hg.core.HgChangesetTreeHandler)} instead |
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266 */ |
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267 @Deprecated |
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268 public void history(HgChangelog.TreeInspector inspector) { |
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269 final CancelSupport cancelSupport = CancelSupport.Factory.get(inspector); |
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270 try { |
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271 final boolean[] needsSorting = { false }; |
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272 final HistoryNode[] completeHistory = new HistoryNode[getRevisionCount()]; |
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273 final int[] commitRevisions = new int[completeHistory.length]; |
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274 RevlogStream.Inspector insp = new RevlogStream.Inspector() { |
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275 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) { |
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276 if (revisionNumber > 0) { |
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277 if (commitRevisions[revisionNumber-1] > linkRevision) { |
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278 needsSorting[0] = true; |
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279 } |
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280 } |
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281 commitRevisions[revisionNumber] = linkRevision; |
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282 HistoryNode p1 = null, p2 = null; |
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283 if (parent1Revision != -1) { |
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284 p1 = completeHistory[parent1Revision]; |
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285 } |
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286 if (parent2Revision != -1) { |
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287 p2 = completeHistory[parent2Revision]; |
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288 } |
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289 completeHistory[revisionNumber] = new HistoryNode(linkRevision, p1, p2); |
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290 } |
317
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291 }; |
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292 content.iterate(0, getLastRevision(), false, insp); |
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293 cancelSupport.checkCancelled(); |
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294 if (needsSorting[0]) { |
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295 Arrays.sort(commitRevisions); |
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296 } |
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297 // read changeset revisions at once (to avoid numerous changelog.getRevision reads) |
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298 // but just nodeids, not RawChangeset (changelog.iterate(data=false) |
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299 ArrayList<Nodeid> changesetRevisions = new ArrayList<Nodeid>(commitRevisions.length); |
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300 getRepo().getChangelog().getRevisionsInternal(changesetRevisions, commitRevisions); |
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301 cancelSupport.checkCancelled(); |
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302 // assign them to corresponding HistoryNodes |
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303 for (int i = 0; i < completeHistory.length; i++ ) { |
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304 final HistoryNode n = completeHistory[i]; |
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305 if (needsSorting[0]) { |
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306 int x = Arrays.binarySearch(commitRevisions, n.changeset); |
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307 assert x >= 0; |
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308 n.cset = changesetRevisions.get(x); |
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309 } else { |
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310 // commit revisions were not sorted, may use original index directly |
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311 n.cset = changesetRevisions.get(i); |
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312 } |
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313 } |
317
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314 cancelSupport.checkCancelled(); |
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315 // XXX shall sort completeHistory according to changeset numbers? |
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316 for (int i = 0; i < completeHistory.length; i++ ) { |
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317 final HistoryNode n = completeHistory[i]; |
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318 HistoryNode p; |
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319 Nodeid p1, p2; |
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320 if ((p = n.parent1) != null) { |
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321 p1 = p.changesetRevision(); |
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322 } else { |
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323 p1 = Nodeid.NULL; |
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324 } |
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325 if ((p= n.parent2) != null) { |
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326 p2 = p.changesetRevision(); |
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327 } else { |
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328 p2 = Nodeid.NULL; |
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329 } |
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330 final Pair<Nodeid, Nodeid> parentChangesets = new Pair<Nodeid, Nodeid>(p1, p2); |
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331 final List<Nodeid> childChangesets; |
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332 if (n.children == null) { |
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333 childChangesets = Collections.emptyList(); |
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334 } else { |
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335 Nodeid[] revisions = new Nodeid[n.children.size()]; |
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336 int j = 0; |
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337 for (HistoryNode hn : n.children) { |
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338 revisions[j++] = hn.changesetRevision(); |
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339 } |
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340 childChangesets = Arrays.asList(revisions); |
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341 } |
317
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342 inspector.next(n.changesetRevision(), parentChangesets, childChangesets); |
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343 cancelSupport.checkCancelled(); |
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344 } |
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345 } catch (CancelledException ex) { |
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346 return; |
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347 } |
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348 } |
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349 |
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350 public void history(HgChangelog.Inspector inspector) { |
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351 history(0, getLastRevision(), inspector); |
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352 } |
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353 |
347
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354 public void history(int start, int end, HgChangelog.Inspector inspector) throws HgInvalidRevisionException { |
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355 if (!exists()) { |
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356 throw new IllegalStateException("Can't get history of invalid repository file node"); |
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357 } |
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358 final int last = getLastRevision(); |
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359 if (end == TIP) { |
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360 end = last; |
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361 } |
300
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362 if (start == TIP) { |
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363 start = last; |
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364 } |
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365 HgInternals.checkRevlogRange(start, end, last); |
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366 |
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367 final int[] commitRevisions = new int[end - start + 1]; |
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368 final boolean[] needsSorting = { false }; |
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369 RevlogStream.Inspector insp = new RevlogStream.Inspector() { |
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370 int count = 0; |
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371 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) { |
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372 if (count > 0) { |
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373 if (commitRevisions[count -1] > linkRevision) { |
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374 needsSorting[0] = true; |
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375 } |
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376 } |
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377 commitRevisions[count++] = linkRevision; |
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378 } |
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379 }; |
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380 content.iterate(start, end, false, insp); |
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381 final HgChangelog changelog = getRepo().getChangelog(); |
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382 if (needsSorting[0]) { |
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383 // automatic tools (svnmerge?) produce unnatural file history |
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384 // (e.g. cpython/Lib/doctest.py, revision 164 points to cset 63509, 165 - to 38453) |
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385 Arrays.sort(commitRevisions); |
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386 } |
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387 changelog.rangeInternal(inspector, commitRevisions); |
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388 } |
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389 |
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390 // for a given local revision of the file, find out local revision in the changelog |
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391 public int getChangesetLocalRevision(int revision) { |
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392 return content.linkRevision(revision); |
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393 } |
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394 |
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395 public Nodeid getChangesetRevision(Nodeid nid) { |
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396 int changelogRevision = getChangesetLocalRevision(getLocalRevision(nid)); |
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397 return getRepo().getChangelog().getRevision(changelogRevision); |
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398 } |
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399 |
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400 public boolean isCopy() throws HgDataStreamException { |
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401 if (metadata == null || !metadata.checked(0)) { |
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402 checkAndRecordMetadata(0); |
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403 } |
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404 if (!metadata.known(0)) { |
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405 return false; |
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406 } |
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407 return metadata.find(0, "copy") != null; |
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408 } |
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409 |
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410 public Path getCopySourceName() throws HgDataStreamException { |
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411 if (isCopy()) { |
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412 return Path.create(metadata.find(0, "copy")); |
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413 } |
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414 throw new UnsupportedOperationException(); // XXX REVISIT, think over if Exception is good (clients would check isCopy() anyway, perhaps null is sufficient?) |
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415 } |
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416 |
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417 public Nodeid getCopySourceRevision() throws HgDataStreamException { |
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418 if (isCopy()) { |
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419 return Nodeid.fromAscii(metadata.find(0, "copyrev")); // XXX reuse/cache Nodeid |
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420 } |
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421 throw new UnsupportedOperationException(); |
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422 } |
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423 |
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424 @Override |
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425 public String toString() { |
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426 StringBuilder sb = new StringBuilder(getClass().getSimpleName()); |
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427 sb.append('('); |
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428 sb.append(getPath()); |
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429 sb.append(')'); |
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430 return sb.toString(); |
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431 } |
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432 |
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433 private void checkAndRecordMetadata(int localRev) throws HgDataStreamException { |
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434 // content() always initializes metadata. |
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435 // FIXME this is expensive way to find out metadata, distinct RevlogStream.Iterator would be better. |
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436 // Alternatively, may parameterize MetadataContentPipe to do prepare only. |
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437 // For reference, when throwing CancelledException, hg status -A --rev 3:80 takes 70 ms |
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438 // however, if we just consume buffer instead (buffer.position(buffer.limit()), same command takes ~320ms |
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439 // (compared to command-line counterpart of 190ms) |
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440 try { |
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441 content(localRev, new ByteChannel() { // No-op channel |
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442 public int write(ByteBuffer buffer) throws IOException, CancelledException { |
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443 throw new CancelledException(); |
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444 } |
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445 }); |
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446 } catch (CancelledException ex) { |
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447 // it's ok, we did that |
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448 } |
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449 } |
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450 |
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451 private static final class MetadataEntry { |
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452 private final String entry; |
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453 private final int valueStart; |
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454 /*package-local*/MetadataEntry(String key, String value) { |
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455 entry = key + value; |
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456 valueStart = key.length(); |
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457 } |
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458 /*package-local*/boolean matchKey(String key) { |
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459 return key.length() == valueStart && entry.startsWith(key); |
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460 } |
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461 // uncomment once/if needed |
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462 // public String key() { |
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463 // return entry.substring(0, valueStart); |
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464 // } |
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465 public String value() { |
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466 return entry.substring(valueStart); |
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467 } |
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468 } |
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469 |
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470 private static class Metadata { |
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471 private static class Record { |
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472 public final int offset; |
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473 public final MetadataEntry[] entries; |
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474 |
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475 public Record(int off, MetadataEntry[] entr) { |
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476 offset = off; |
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477 entries = entr; |
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478 } |
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479 } |
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480 // XXX sparse array needed |
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481 private final IntMap<Record> entries = new IntMap<Record>(5); |
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482 |
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483 private final Record NONE = new Record(-1, null); // don't want statics |
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484 |
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485 // true when there's metadata for given revision |
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486 boolean known(int revision) { |
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487 Record i = entries.get(revision); |
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488 return i != null && NONE != i; |
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489 } |
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490 |
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491 // true when revision has been checked for metadata presence. |
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492 public boolean checked(int revision) { |
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493 return entries.containsKey(revision); |
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494 } |
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495 |
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496 // true when revision has been checked and found not having any metadata |
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497 boolean none(int revision) { |
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498 Record i = entries.get(revision); |
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499 return i == NONE; |
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500 } |
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501 |
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502 // mark revision as having no metadata. |
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503 void recordNone(int revision) { |
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504 Record i = entries.get(revision); |
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505 if (i == NONE) { |
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506 return; // already there |
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507 } |
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508 if (i != null) { |
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509 throw new IllegalStateException(String.format("Trying to override Metadata state for revision %d (known offset: %d)", revision, i)); |
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510 } |
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511 entries.put(revision, NONE); |
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512 } |
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513 |
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514 // since this is internal class, callers are supposed to ensure arg correctness (i.e. ask known() before) |
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515 int dataOffset(int revision) { |
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516 return entries.get(revision).offset; |
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517 } |
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518 void add(int revision, int dataOffset, Collection<MetadataEntry> e) { |
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519 assert !entries.containsKey(revision); |
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520 entries.put(revision, new Record(dataOffset, e.toArray(new MetadataEntry[e.size()]))); |
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521 } |
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522 |
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523 String find(int revision, String key) { |
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524 for (MetadataEntry me : entries.get(revision).entries) { |
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525 if (me.matchKey(key)) { |
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526 return me.value(); |
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527 } |
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528 } |
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529 return null; |
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530 } |
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531 } |
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532 |
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533 private static class MetadataInspector extends ErrorHandlingInspector implements RevlogStream.Inspector { |
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534 private final Metadata metadata; |
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535 private final Path fname; // need this only for error reporting |
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536 private final RevlogStream.Inspector delegate; |
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537 |
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538 public MetadataInspector(Metadata _metadata, Path file, RevlogStream.Inspector chain) { |
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539 metadata = _metadata; |
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540 fname = file; |
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541 delegate = chain; |
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542 setCancelSupport(CancelSupport.Factory.get(chain)); |
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543 } |
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544 |
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545 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) { |
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546 try { |
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547 final int daLength = data.length(); |
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548 if (daLength < 4 || data.readByte() != 1 || data.readByte() != 10) { |
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549 metadata.recordNone(revisionNumber); |
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550 data.reset(); |
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551 } else { |
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552 ArrayList<MetadataEntry> _metadata = new ArrayList<MetadataEntry>(); |
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553 int offset = parseMetadata(data, daLength, _metadata); |
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554 metadata.add(revisionNumber, offset, _metadata); |
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555 // da is in prepared state (i.e. we consumed all bytes up to metadata end). |
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556 // However, it's not safe to assume delegate won't call da.reset() for some reason, |
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557 // and we need to ensure predictable result. |
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558 data.reset(); |
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559 data = new FilterDataAccess(data, offset, daLength - offset); |
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560 } |
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561 if (delegate != null) { |
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562 delegate.next(revisionNumber, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, nodeid, data); |
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563 } |
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564 } catch (IOException ex) { |
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565 recordFailure(ex); |
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566 } catch (HgDataStreamException ex) { |
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567 recordFailure(ex.setRevisionNumber(revisionNumber)); |
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568 } |
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569 } |
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570 |
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571 private int parseMetadata(DataAccess data, final int daLength, ArrayList<MetadataEntry> _metadata) throws IOException, HgDataStreamException { |
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572 int lastEntryStart = 2; |
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573 int lastColon = -1; |
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574 // XXX in fact, need smth like ByteArrayBuilder, similar to StringBuilder, |
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575 // which can't be used here because we can't convert bytes to chars as we read them |
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576 // (there might be multi-byte encoding), and we need to collect all bytes before converting to string |
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577 ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
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578 String key = null, value = null; |
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579 boolean byteOne = false; |
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580 boolean metadataIsComplete = false; |
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581 for (int i = 2; i < daLength; i++) { |
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582 byte b = data.readByte(); |
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583 if (b == '\n') { |
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584 if (byteOne) { // i.e. \n follows 1 |
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585 lastEntryStart = i+1; |
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586 metadataIsComplete = true; |
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587 // XXX is it possible to have here incomplete key/value (i.e. if last pair didn't end with \n) |
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588 // if yes, need to set metadataIsComplete to true in that case as well |
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589 break; |
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590 } |
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591 if (key == null || lastColon == -1 || i <= lastColon) { |
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592 throw new IllegalStateException(); // FIXME log instead and record null key in the metadata. Ex just to fail fast during dev |
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593 } |
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594 value = new String(bos.toByteArray()).trim(); |
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595 bos.reset(); |
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596 _metadata.add(new MetadataEntry(key, value)); |
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597 key = value = null; |
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598 lastColon = -1; |
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599 lastEntryStart = i+1; |
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600 continue; |
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601 } |
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602 // byteOne has to be consumed up to this line, if not yet, consume it |
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603 if (byteOne) { |
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604 // insert 1 we've read on previous step into the byte builder |
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605 bos.write(1); |
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606 byteOne = false; |
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607 // fall-through to consume current byte |
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608 } |
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609 if (b == (int) ':') { |
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610 assert value == null; |
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611 key = new String(bos.toByteArray()); |
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612 bos.reset(); |
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613 lastColon = i; |
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614 } else if (b == 1) { |
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615 byteOne = true; |
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616 } else { |
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617 bos.write(b); |
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618 } |
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619 } |
323
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620 // data.isEmpty is not reliable, renamed files of size==0 keep only metadata |
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621 if (!metadataIsComplete) { |
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622 // XXX perhaps, worth a testcase (empty file, renamed, read or ask ifCopy |
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623 throw new HgDataStreamException(fname, "Metadata is not closed properly", null); |
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624 } |
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625 return lastEntryStart; |
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626 } |
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627 |
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628 @Override |
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629 public void checkFailed() throws HgException, IOException, CancelledException { |
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630 super.checkFailed(); |
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631 if (delegate instanceof ErrorHandlingInspector) { |
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632 // XXX need to add ErrorDestination and pass it around (much like CancelSupport get passed) |
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633 // so that delegate would be able report its failures directly to caller without this hack |
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634 ((ErrorHandlingInspector) delegate).checkFailed(); |
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635 } |
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636 } |
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637 } |
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638 } |