Mercurial > jhg

annotate src/com/tmate/hgkit/ll/Changeset.java @ 50:f1db8610da62

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Log to consult (placeholder, for now) class to find out associated tags
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 15 Jan 2011 01:41:49 +0100
parents 26e3eeaa3962
children fd4f2c98995b
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 }