Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/Changeset.java @ 48:e34f90b9ded1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Limit option for history/log
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 23:22:20 +0100
parents b01500fe2604
children 26e3eeaa3962
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.List;
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12 import java.util.Locale;
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13 import java.util.Map;
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14
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15 /**
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16 * @see mercurial/changelog.py:read()
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17 * <pre>
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18 format used:
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19 nodeid\n : manifest node in ascii
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20 user\n : user, no \n or \r allowed
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21 time tz extra\n : date (time is int or float, timezone is int)
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22 : extra is metadatas, encoded and separated by '\0'
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23 : older versions ignore it
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24 files\n\n : files modified by the cset, no \n or \r allowed
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25 (.*) : comment (free text, ideally utf-8)
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26
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27 changelog v0 doesn't use extra
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28 * </pre>
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29 * @author artem
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30 */
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31 public class Changeset implements Cloneable /*for those that would like to keep a copy*/ {
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32 // TODO immutable
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33 private /*final*/ Nodeid manifest;
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34 private String user;
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35 private String comment;
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36 private List<String> files; // unmodifiable collection (otherwise #files() and implicit #clone() shall be revised)
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37 private Date time;
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38 private int timezone; // not sure it's of any use
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39 private String extras; // TODO branch, etc.
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41 private Changeset() {
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42 }
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43
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44 public Nodeid manifest() {
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45 return manifest;
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46 }
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47
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48 public String user() {
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49 return user;
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50 }
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51
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52 public String comment() {
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53 return comment;
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54 }
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55
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56 public List<String> files() {
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57 return files;
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58 }
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59
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60 public Date date() {
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61 return time;
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62 }
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63
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64 public String dateString() {
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65 StringBuilder sb = new StringBuilder(30);
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66 Formatter f = new Formatter(sb, Locale.US);
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67 f.format("%ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz", time);
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68 return sb.toString();
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69 }
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70
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71 public Map<String, String> extras() {
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72 return null; // TODO
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73 }
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74
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75 @Override
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76 public String toString() {
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77 StringBuilder sb = new StringBuilder();
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78 sb.append("Changeset {");
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79 sb.append("User: ").append(user).append(", ");
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80 sb.append("Comment: ").append(comment).append(", ");
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81 sb.append("Manifest: ").append(manifest).append(", ");
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82 sb.append("Date: ").append(time).append(", ");
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83 sb.append("Files: ").append(files.size());
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84 for (String s : files) {
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85 sb.append(", ").append(s);
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86 }
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87 if (extras != null) {
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88 sb.append(", Extra: ").append(extras);
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89 }
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90 sb.append("}");
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91 return sb.toString();
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92 }
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93
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94 public static Changeset parse(byte[] data, int offset, int length) {
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95 Changeset rv = new Changeset();
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96 rv.init(data, offset, length);
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97 return rv;
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98 }
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99
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100 /*package-local*/ void init(byte[] data, int offset, int length) {
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101 final int bufferEndIndex = offset + length;
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102 final byte lineBreak = (byte) '\n';
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103 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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104 if (breakIndex1 == -1) {
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105 throw new IllegalArgumentException("Bad Changeset data");
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106 }
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107 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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108 int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex);
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109 if (breakIndex2 == -1) {
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110 throw new IllegalArgumentException("Bad Changeset data");
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111 }
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112 String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
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113 int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex);
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114 if (breakIndex3 == -1) {
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115 throw new IllegalArgumentException("Bad Changeset data");
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116 }
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117 String _timeString = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
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118 int space1 = _timeString.indexOf(' ');
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119 if (space1 == -1) {
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120 throw new IllegalArgumentException("Bad Changeset data");
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121 }
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122 int space2 = _timeString.indexOf(' ', space1+1);
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123 if (space2 == -1) {
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124 space2 = _timeString.length();
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125 }
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126 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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127 int _timezone = Integer.parseInt(_timeString.substring(space1+1, space2));
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128 // 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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129 // on commit and timezone is recorded to adjust it to UTC.
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130 Date _time = new Date(unixTime * 1000);
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131 String _extras = space2 < _timeString.length() ? _timeString.substring(space2+1) : null;
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132
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133 //
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134 int lastStart = breakIndex3 + 1;
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135 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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136 ArrayList<String> _files = new ArrayList<String>(5);
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137 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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138 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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139 lastStart = breakIndex4 + 1;
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140 if (data[breakIndex4 + 1] == lineBreak) {
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141 // found \n\n
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142 break;
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143 } else {
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144 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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145 }
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146 }
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147 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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148 throw new IllegalArgumentException("Bad Changeset data");
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149 }
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150 String _comment;
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151 try {
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152 _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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153 } catch (UnsupportedEncodingException ex) {
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154 _comment = "";
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155 throw new IllegalStateException("Could hardly happen");
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156 }
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157 // change this instance at once, don't leave it partially changes in case of error
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158 this.manifest = _nodeid;
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159 this.user = _user;
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160 this.time = _time;
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161 this.timezone = _timezone;
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162 this.files = Collections.unmodifiableList(_files);
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163 this.comment = _comment;
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164 this.extras = _extras;
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165 }
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166
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167 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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168 for (int i = startOffset; i < endIndex; i++) {
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169 if (src[i] == what) {
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170 return i;
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171 }
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172 }
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173 return -1;
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174 }
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175
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176 public interface Inspector {
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177 // first(), last(), single().
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178 // <T>
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179 // TODO describe whether cset is new instance each time
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180 void next(int revisionNumber, Nodeid nodeid, Changeset cset);
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181 }
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182 }