Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/Changeset.java @ 17:571e1b2cc3f7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 27 Dec 2010 01:43:08 +0100
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children 50dfc69c108e
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1 /**
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2 * Copyright (c) 2010 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
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9 /**
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10 * @see mercurial/changelog.py:read()
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11 * <pre>
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12 format used:
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13 nodeid\n : manifest node in ascii
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14 user\n : user, no \n or \r allowed
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15 time tz extra\n : date (time is int or float, timezone is int)
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16 : extra is metadatas, encoded and separated by '\0'
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17 : older versions ignore it
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18 files\n\n : files modified by the cset, no \n or \r allowed
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19 (.*) : comment (free text, ideally utf-8)
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20
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21 changelog v0 doesn't use extra
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22 * </pre>
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23 * @author artem
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24 */
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25 public class Changeset {
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26 // TODO immutable
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27 private /*final*/ Nodeid nodeid;
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28 private String user;
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29 private String comment;
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30 private ArrayList<String> files;
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31 private String timezone; // FIXME
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32
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33 public void dump() {
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34 System.out.println("User:" + user);
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35 System.out.println("Comment:" + comment);
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36 System.out.println("Nodeid:" + nodeid);
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37 System.out.println("Date:" + timezone);
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38 System.out.println("Files: " + files.size());
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39 for (String s : files) {
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40 System.out.print('\t');
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41 System.out.println(s);
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42 }
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43 }
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44
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45 public static Changeset parse(byte[] data, int offset, int length) {
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46 Changeset rv = new Changeset();
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47 rv.init(data, offset, length);
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48 return rv;
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49 }
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50
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51 /*package-local*/ void init(byte[] data, int offset, int length) {
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52 final int bufferEndIndex = offset + length;
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53 final byte lineBreak = (byte) '\n';
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54 int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex);
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55 if (breakIndex1 == -1) {
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56 throw new IllegalArgumentException("Bad Changeset data");
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57 }
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58 Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1);
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59 int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex);
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60 if (breakIndex2 == -1) {
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61 throw new IllegalArgumentException("Bad Changeset data");
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62 }
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63 String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
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64 int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex);
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65 if (breakIndex3 == -1) {
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66 throw new IllegalArgumentException("Bad Changeset data");
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67 }
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68 String _timezone = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
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69
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70 //
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71 int lastStart = breakIndex3 + 1;
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72 int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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73 ArrayList<String> _files = new ArrayList<String>(5);
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74 while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
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75 _files.add(new String(data, lastStart, breakIndex4 - lastStart));
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76 lastStart = breakIndex4 + 1;
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77 if (data[breakIndex4 + 1] == lineBreak) {
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78 // found \n\n
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79 break;
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80 } else {
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81 breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex);
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82 }
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83 }
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84 if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
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85 throw new IllegalArgumentException("Bad Changeset data");
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86 }
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87 String _comment;
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88 try {
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89 _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
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90 } catch (UnsupportedEncodingException ex) {
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91 _comment = "";
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92 throw new IllegalStateException("Could hardly happen");
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93 }
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94 // change this instance at once, don't leave it partially changes in case of error
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95 this.nodeid = _nodeid;
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96 this.user = _user;
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97 this.timezone = _timezone;
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98 this.files = _files;
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99 this.comment = _comment;
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100 }
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101
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102 private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
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103 for (int i = startOffset; i < endIndex; i++) {
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104 if (src[i] == what) {
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105 return i;
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106 }
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107 }
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108 return -1;
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109 }
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110
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111 public interface Inspector {
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112 // first(), last(), single().
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113 // <T>
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114 void next(Changeset cset);
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115 }
0
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116 }