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annotate src/com/tmate/hgkit/ll/Changeset.java @ 40:21e26da142fa

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Time parsing in Changeset
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 03:37:06 +0100
parents 50dfc69c108e
children b01500fe2604
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.Date;
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9 import java.util.Locale;
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10
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11 /**
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12 * @see mercurial/changelog.py:read()
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13 * <pre>
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14 format used:
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15 nodeid\n : manifest node in ascii
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16 user\n : user, no \n or \r allowed
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17 time tz extra\n : date (time is int or float, timezone is int)
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18 : extra is metadatas, encoded and separated by '\0'
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19 : older versions ignore it
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20 files\n\n : files modified by the cset, no \n or \r allowed
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21 (.*) : comment (free text, ideally utf-8)
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22
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23 changelog v0 doesn't use extra
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24 * </pre>
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25 * @author artem
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26 */
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27 public class Changeset {
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28 // TODO immutable
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29 private /*final*/ Nodeid manifest;
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30 private String user;
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31 private String comment;
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32 private ArrayList<String> files;
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33 private Date time;
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34 private String extras; // TODO branch, etc.
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35
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36 public void dump() {
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37 System.out.println("User: " + user);
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38 System.out.println("Comment: " + comment);
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39 System.out.println("Manifest: " + manifest);
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40 System.out.printf(Locale.US, "Date: %ta %<tb %<td %<tH:%<tM:%<tS %<tY %<tz\n", time);
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41 System.out.println("Files: " + files.size());
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42 if (extras != null) {
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43 System.out.println("Extra: " + extras);
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44 }
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45 for (String s : files) {
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46 System.out.print('\t');
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47 System.out.println(s);
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48 }
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49 }
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50
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51 public static Changeset parse(byte[] data, int offset, int length) {
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52 Changeset rv = new Changeset();
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53 rv.init(data, offset, length);
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54 return rv;
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55 }
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56
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57 /*package-local*/ void init(byte[] data, int offset, int length) {
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58 final int bufferEndIndex = offset + length;
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59 final byte lineBreak = (byte) '\n';
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60 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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61 if (breakIndex1 == -1) {
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62 throw new IllegalArgumentException("Bad Changeset data");
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63 }
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64 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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65 int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex);
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66 if (breakIndex2 == -1) {
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67 throw new IllegalArgumentException("Bad Changeset data");
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68 }
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69 String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
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70 int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex);
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71 if (breakIndex3 == -1) {
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72 throw new IllegalArgumentException("Bad Changeset data");
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73 }
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74 String _timeString = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
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75 int space1 = _timeString.indexOf(' ');
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76 if (space1 == -1) {
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77 throw new IllegalArgumentException("Bad Changeset data");
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78 }
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79 int space2 = _timeString.indexOf(' ', space1+1);
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80 if (space2 == -1) {
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81 space2 = _timeString.length();
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82 }
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83 long unixTime = Long.parseLong(_timeString.substring(0, space1)); // XXX Float, perhaps
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84 int timezone = Integer.parseInt(_timeString.substring(space1+1, space2));
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85 // 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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86 // on commit and timezone is recorded to adjust it to UTC.
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87 Date _time = new Date((unixTime + timezone) * 1000);
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88 String _extras = space2 < _timeString.length() ? _timeString.substring(space2+1) : null;
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89
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90 //
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91 int lastStart = breakIndex3 + 1;
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92 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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93 ArrayList<String> _files = new ArrayList<String>(5);
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94 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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95 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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96 lastStart = breakIndex4 + 1;
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97 if (data[breakIndex4 + 1] == lineBreak) {
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98 // found \n\n
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99 break;
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100 } else {
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101 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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102 }
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103 }
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104 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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105 throw new IllegalArgumentException("Bad Changeset data");
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106 }
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107 String _comment;
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108 try {
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109 _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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110 } catch (UnsupportedEncodingException ex) {
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111 _comment = "";
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112 throw new IllegalStateException("Could hardly happen");
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113 }
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114 // change this instance at once, don't leave it partially changes in case of error
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115 this.manifest = _nodeid;
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116 this.user = _user;
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117 this.time = _time;
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118 this.files = _files;
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119 this.comment = _comment;
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120 this.extras = _extras;
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121 }
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122
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123 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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124 for (int i = startOffset; i < endIndex; i++) {
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125 if (src[i] == what) {
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126 return i;
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127 }
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128 }
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129 return -1;
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130 }
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131
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132 public interface Inspector {
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133 // first(), last(), single().
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134 // <T>
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
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135 void next(Changeset cset);
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
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136 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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137 }