Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/Changeset.java @ 115:c0cc2535462c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Introduced channels to pipeline (and easily filter) data streams
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 03 Feb 2011 23:32:08 +0100
parents a3a2e5deb320
children 44b97930570c
rev   line source
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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 java.io.UnsupportedEncodingException;
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20 import java.util.ArrayList;
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21 import java.util.Collections;
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22 import java.util.Date;
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23 import java.util.Formatter;
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24 import java.util.HashMap;
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25 import java.util.List;
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26 import java.util.Locale;
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27 import java.util.Map;
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28
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29 import org.tmatesoft.hg.core.Nodeid;
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30
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31 /**
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32 * @see mercurial/changelog.py:read()
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33 * <pre>
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34 format used:
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35 nodeid\n : manifest node in ascii
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36 user\n : user, no \n or \r allowed
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37 time tz extra\n : date (time is int or float, timezone is int)
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38 : extra is metadatas, encoded and separated by '\0'
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39 : older versions ignore it
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40 files\n\n : files modified by the cset, no \n or \r allowed
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41 (.*) : comment (free text, ideally utf-8)
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42
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43 changelog v0 doesn't use extra
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44 * </pre>
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45 *
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46 * @author Artem Tikhomirov
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47 * @author TMate Software Ltd.
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48 */
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49 public class Changeset implements Cloneable /*for those that would like to keep a copy*/ {
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50 // TODO immutable
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51 private /*final*/ Nodeid manifest;
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52 private String user;
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53 private String comment;
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54 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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55 private Date time;
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56 private int timezone; // not sure it's of any use
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57 private Map<String,String> extras;
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58
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59 private Changeset() {
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60 }
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61
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62 public Nodeid manifest() {
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63 return manifest;
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64 }
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65
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66 public String user() {
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67 return user;
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68 }
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69
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70 public String comment() {
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71 return comment;
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72 }
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73
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74 public List<String> files() {
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75 return files;
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76 }
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77
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78 public Date date() {
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79 return time;
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80 }
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81
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82 public String dateString() {
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83 StringBuilder sb = new StringBuilder(30);
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84 Formatter f = new Formatter(sb, Locale.US);
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85 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", time);
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86 return sb.toString();
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87 }
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88
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89 public Map<String, String> extras() {
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90 return extras;
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91 }
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92
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93 public String branch() {
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94 return extras.get("branch");
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95 }
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96
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97 @Override
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98 public String toString() {
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99 StringBuilder sb = new StringBuilder();
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100 sb.append("Changeset {");
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101 sb.append("User: ").append(user).append(", ");
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102 sb.append("Comment: ").append(comment).append(", ");
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103 sb.append("Manifest: ").append(manifest).append(", ");
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104 sb.append("Date: ").append(time).append(", ");
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105 sb.append("Files: ").append(files.size());
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106 for (String s : files) {
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107 sb.append(", ").append(s);
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108 }
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109 if (extras != null) {
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110 sb.append(", Extra: ").append(extras);
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111 }
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112 sb.append("}");
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113 return sb.toString();
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114 }
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116 @Override
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117 public Changeset clone() {
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118 try {
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119 return (Changeset) super.clone();
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120 } catch (CloneNotSupportedException ex) {
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121 throw new InternalError(ex.toString());
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122 }
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123 }
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124
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125 public static Changeset parse(byte[] data, int offset, int length) {
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126 Changeset rv = new Changeset();
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127 rv.init(data, offset, length);
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128 return rv;
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129 }
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130
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131 /*package-local*/ void init(byte[] data, int offset, int length) {
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132 final int bufferEndIndex = offset + length;
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133 final byte lineBreak = (byte) '\n';
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134 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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135 if (breakIndex1 == -1) {
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136 throw new IllegalArgumentException("Bad Changeset data");
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137 }
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138 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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139 int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex);
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140 if (breakIndex2 == -1) {
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141 throw new IllegalArgumentException("Bad Changeset data");
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142 }
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143 String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
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144 int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex);
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145 if (breakIndex3 == -1) {
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146 throw new IllegalArgumentException("Bad Changeset data");
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147 }
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148 String _timeString = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
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149 int space1 = _timeString.indexOf(' ');
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150 if (space1 == -1) {
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151 throw new IllegalArgumentException("Bad Changeset data");
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152 }
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153 int space2 = _timeString.indexOf(' ', space1+1);
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154 if (space2 == -1) {
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155 space2 = _timeString.length();
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156 }
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157 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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158 int _timezone = Integer.parseInt(_timeString.substring(space1+1, space2));
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159 // 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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160 // on commit and timezone is recorded to adjust it to UTC.
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161 Date _time = new Date(unixTime * 1000);
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162 String _extras = space2 < _timeString.length() ? _timeString.substring(space2+1) : null;
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163 Map<String, String> _extrasMap;
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164 if (_extras == null) {
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165 _extrasMap = Collections.singletonMap("branch", "default");
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166 } else {
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167 _extrasMap = new HashMap<String, String>();
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168 for (String pair : _extras.split("\00")) {
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169 int eq = pair.indexOf(':');
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170 // FIXME need to decode key/value, @see changelog.py:decodeextra
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171 _extrasMap.put(pair.substring(0, eq), pair.substring(eq+1));
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172 }
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173 if (!_extrasMap.containsKey("branch")) {
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174 _extrasMap.put("branch", "default");
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175 }
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176 _extrasMap = Collections.unmodifiableMap(_extrasMap);
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177 }
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178
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179 //
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180 int lastStart = breakIndex3 + 1;
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181 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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182 ArrayList<String> _files = null;
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183 if (breakIndex4 > lastStart) {
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184 // if breakIndex4 == lastStart, we already found \n\n and hence there are no files (e.g. merge revision)
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185 _files = new ArrayList<String>(5);
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186 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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187 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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188 lastStart = breakIndex4 + 1;
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189 if (data[breakIndex4 + 1] == lineBreak) {
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190 // found \n\n
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191 break;
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192 } else {
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193 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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194 }
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195 }
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196 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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197 throw new IllegalArgumentException("Bad Changeset data");
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198 }
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199 } else {
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200 breakIndex4--;
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201 }
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202 String _comment;
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203 try {
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204 _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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205 } catch (UnsupportedEncodingException ex) {
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206 _comment = "";
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207 throw new IllegalStateException("Could hardly happen");
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208 }
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209 // change this instance at once, don't leave it partially changes in case of error
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210 this.manifest = _nodeid;
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211 this.user = _user;
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212 this.time = _time;
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213 this.timezone = _timezone;
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214 this.files = _files == null ? Collections.<String>emptyList() : Collections.unmodifiableList(_files);
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215 this.comment = _comment;
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216 this.extras = _extrasMap;
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217 }
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218
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219 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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220 for (int i = startOffset; i < endIndex; i++) {
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221 if (src[i] == what) {
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222 return i;
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223 }
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224 }
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225 return -1;
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226 }
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227
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228 public interface Inspector {
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229 // first(), last(), single().
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230 // <T>
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231 // TODO describe whether cset is new instance each time
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232 void next(int revisionNumber, Nodeid nodeid, Changeset cset);
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233 }
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234 }