Mercurial > jhg

annotate src/com/tmate/hgkit/ll/Changeset.java @ 55:05829a70b30b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Status operation extracted into separate, cache-friendly class
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 17 Jan 2011 04:45:09 +0100
parents fd4f2c98995b
children 19e9e220bf68
rev   line source
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1 /*
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2 * Copyright (c) 2010, 2011 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 import java.io.UnsupportedEncodingException;
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7 import java.util.ArrayList;
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8 import java.util.Collections;
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9 import java.util.Date;
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10 import java.util.Formatter;
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11 import java.util.HashMap;
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12 import java.util.List;
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13 import java.util.Locale;
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14 import java.util.Map;
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15
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16 /**
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17 * @see mercurial/changelog.py:read()
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18 * <pre>
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19 format used:
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20 nodeid\n : manifest node in ascii
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21 user\n : user, no \n or \r allowed
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22 time tz extra\n : date (time is int or float, timezone is int)
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23 : extra is metadatas, encoded and separated by '\0'
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24 : older versions ignore it
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25 files\n\n : files modified by the cset, no \n or \r allowed
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26 (.*) : comment (free text, ideally utf-8)
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27
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28 changelog v0 doesn't use extra
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29 * </pre>
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30 * @author artem
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31 */
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32 public class Changeset implements Cloneable /*for those that would like to keep a copy*/ {
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33 // TODO immutable
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34 private /*final*/ Nodeid manifest;
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35 private String user;
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36 private String comment;
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37 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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38 private Date time;
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39 private int timezone; // not sure it's of any use
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40 private Map<String,String> extras;
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41
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42 private Changeset() {
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43 }
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44
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45 public Nodeid manifest() {
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46 return manifest;
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47 }
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48
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49 public String user() {
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50 return user;
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51 }
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52
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53 public String comment() {
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54 return comment;
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55 }
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56
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57 public List<String> files() {
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58 return files;
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59 }
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60
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61 public Date date() {
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62 return time;
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63 }
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64
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65 public String dateString() {
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66 StringBuilder sb = new StringBuilder(30);
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67 Formatter f = new Formatter(sb, Locale.US);
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68 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", time);
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69 return sb.toString();
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70 }
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71
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72 public Map<String, String> extras() {
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73 return extras;
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74 }
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75
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76 public String branch() {
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77 return extras.get("branch");
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78 }
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79
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80 @Override
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81 public String toString() {
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82 StringBuilder sb = new StringBuilder();
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83 sb.append("Changeset {");
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84 sb.append("User: ").append(user).append(", ");
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85 sb.append("Comment: ").append(comment).append(", ");
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86 sb.append("Manifest: ").append(manifest).append(", ");
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87 sb.append("Date: ").append(time).append(", ");
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88 sb.append("Files: ").append(files.size());
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89 for (String s : files) {
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90 sb.append(", ").append(s);
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91 }
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92 if (extras != null) {
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93 sb.append(", Extra: ").append(extras);
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94 }
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95 sb.append("}");
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96 return sb.toString();
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97 }
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98
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99 public static Changeset parse(byte[] data, int offset, int length) {
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100 Changeset rv = new Changeset();
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101 rv.init(data, offset, length);
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102 return rv;
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103 }
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104
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105 /*package-local*/ void init(byte[] data, int offset, int length) {
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106 final int bufferEndIndex = offset + length;
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107 final byte lineBreak = (byte) '\n';
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108 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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109 if (breakIndex1 == -1) {
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110 throw new IllegalArgumentException("Bad Changeset data");
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111 }
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112 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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113 int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex);
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114 if (breakIndex2 == -1) {
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115 throw new IllegalArgumentException("Bad Changeset data");
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116 }
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117 String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
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118 int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex);
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119 if (breakIndex3 == -1) {
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120 throw new IllegalArgumentException("Bad Changeset data");
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121 }
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122 String _timeString = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
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123 int space1 = _timeString.indexOf(' ');
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124 if (space1 == -1) {
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125 throw new IllegalArgumentException("Bad Changeset data");
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126 }
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127 int space2 = _timeString.indexOf(' ', space1+1);
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128 if (space2 == -1) {
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129 space2 = _timeString.length();
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130 }
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131 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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132 int _timezone = Integer.parseInt(_timeString.substring(space1+1, space2));
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133 // XXX not sure need to add timezone here - I can't figure out whether Hg keeps GMT time, and records timezone just for info, or unixTime is taken local
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134 // on commit and timezone is recorded to adjust it to UTC.
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135 Date _time = new Date(unixTime * 1000);
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136 String _extras = space2 < _timeString.length() ? _timeString.substring(space2+1) : null;
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137 Map<String, String> _extrasMap;
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138 if (_extras == null) {
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139 _extrasMap = Collections.singletonMap("branch", "default");
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140 } else {
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141 _extrasMap = new HashMap<String, String>();
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142 for (String pair : _extras.split("\00")) {
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143 int eq = pair.indexOf(':');
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144 // FIXME need to decode key/value, @see changelog.py:decodeextra
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145 _extrasMap.put(pair.substring(0, eq), pair.substring(eq+1));
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146 }
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147 if (!_extrasMap.containsKey("branch")) {
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148 _extrasMap.put("branch", "default");
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149 }
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150 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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151 }
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152
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153 //
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154 int lastStart = breakIndex3 + 1;
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155 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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156 ArrayList<String> _files = new ArrayList<String>(5);
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157 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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158 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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159 lastStart = breakIndex4 + 1;
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160 if (data[breakIndex4 + 1] == lineBreak) {
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161 // found \n\n
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162 break;
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163 } else {
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164 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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165 }
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166 }
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167 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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168 throw new IllegalArgumentException("Bad Changeset data");
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169 }
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170 String _comment;
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171 try {
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172 _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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173 } catch (UnsupportedEncodingException ex) {
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174 _comment = "";
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175 throw new IllegalStateException("Could hardly happen");
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176 }
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177 // change this instance at once, don't leave it partially changes in case of error
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178 this.manifest = _nodeid;
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179 this.user = _user;
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180 this.time = _time;
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181 this.timezone = _timezone;
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182 this.files = Collections.unmodifiableList(_files);
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183 this.comment = _comment;
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184 this.extras = _extrasMap;
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185 }
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186
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187 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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188 for (int i = startOffset; i < endIndex; i++) {
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189 if (src[i] == what) {
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190 return i;
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191 }
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192 }
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193 return -1;
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194 }
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195
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196 public interface Inspector {
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197 // first(), last(), single().
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198 // <T>
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199 // TODO describe whether cset is new instance each time
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200 void next(int revisionNumber, Nodeid nodeid, Changeset cset);
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201 }
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202 }