Mercurial > jhg

annotate src/com/tmate/hgkit/ll/Changeset.java @ 42:92c3d0920d58

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Real integrity check, with exception. DigestHelper refactored to accomodate new needs
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 14 Jan 2011 04:29:03 +0100
parents 21e26da142fa
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>
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135 void next(Changeset cset);
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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136 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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137 }