Mercurial > jhg
annotate src/com/tmate/hgkit/ll/HgDirstate.java @ 10:382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> | 
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| date | Sat, 25 Dec 2010 21:50:12 +0100 | 
| parents | |
| children | d46773d89a19 | 
| rev | line source | 
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10
 
382cfe9463db
Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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1 /* | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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2 * Copyright (c) 2010 Artem Tikhomirov | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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3 */ | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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4 package com.tmate.hgkit.ll; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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5 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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6 import java.io.File; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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7 import java.io.IOException; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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8 import java.util.Collections; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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9 import java.util.Date; | 
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10 import java.util.LinkedList; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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11 import java.util.List; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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12 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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13 import com.tmate.hgkit.fs.DataAccess; | 
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14 import com.tmate.hgkit.fs.DataAccessProvider; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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15 | 
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16 /** | 
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17 * @see http://mercurial.selenic.com/wiki/DirState | 
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18 * @see http://mercurial.selenic.com/wiki/FileFormats#dirstate | 
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19 * @author artem | 
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20 */ | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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21 public class HgDirstate { | 
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22 | 
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23 private final LocalHgRepo repo; | 
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24 private final File dirstateFile; | 
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25 private List<Record> normal; | 
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26 private List<Record> added; | 
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27 private List<Record> removed; | 
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28 private List<Record> merged; | 
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29 | 
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30 public HgDirstate(LocalHgRepo hgRepo, File dirstate) { | 
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31 this.repo = hgRepo; | 
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32 this.dirstateFile = dirstate; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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33 } | 
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34 | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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35 private void read() { | 
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36 normal = added = removed = merged = Collections.emptyList(); | 
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37 if (!dirstateFile.exists()) { | 
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38 return; | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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39 } | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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40 DataAccessProvider dap = repo.getDataAccess(); | 
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41 DataAccess da = dap.create(dirstateFile); | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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42 if (da.isEmpty()) { | 
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43 return; | 
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44 } | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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45 normal = new LinkedList<Record>(); | 
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46 added = new LinkedList<Record>(); | 
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47 removed = new LinkedList<Record>(); | 
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48 merged = new LinkedList<Record>(); | 
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49 try { | 
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50 // XXX skip(40) if we don't need these? | 
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51 byte[] parents = new byte[40]; | 
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52 da.readBytes(parents, 0, 40); | 
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53 parents = null; | 
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54 do { | 
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55 final byte state = da.readByte(); | 
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56 final int fmode = da.readInt(); | 
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57 final int size = da.readInt(); | 
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58 final int time = da.readInt(); | 
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59 final int nameLen = da.readInt(); | 
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60 String fn1 = null, fn2 = null; | 
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61 byte[] name = new byte[nameLen]; | 
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62 da.readBytes(name, 0, nameLen); | 
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63 for (int i = 0; i < nameLen; i++) { | 
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64 if (name[i] == 0) { | 
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65 fn1 = new String(name, 0, i); | 
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66 fn2 = new String(name, i+1, nameLen); | 
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67 break; | 
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68 } | 
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69 } | 
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70 if (fn1 == null) { | 
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71 fn1 = new String(name); | 
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72 } | 
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73 Record r = new Record(fmode, size, time, fn1, fn2); | 
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74 if (state == 'n') { | 
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75 normal.add(r); | 
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76 } else if (state == 'a') { | 
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77 added.add(r); | 
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78 } else if (state == 'r') { | 
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79 removed.add(r); | 
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80 } else if (state == 'm') { | 
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81 merged.add(r); | 
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82 } else { | 
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83 // FIXME log error? | 
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84 } | 
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85 } while (!da.isEmpty()); | 
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86 } catch (IOException ex) { | 
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87 ex.printStackTrace(); // FIXME log error, clean dirstate? | 
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88 } finally { | 
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89 da.done(); | 
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90 } | 
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91 } | 
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92 | 
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93 public void dump() { | 
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94 read(); | 
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95 @SuppressWarnings("unchecked") | 
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96 List<Record>[] all = new List[] { normal, added, removed, merged }; | 
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97 char[] x = new char[] {'n', 'a', 'r', 'm' }; | 
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98 for (int i = 0; i < all.length; i++) { | 
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99 for (Record r : all[i]) { | 
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100 System.out.printf("%c %3o%6d %30tc\t\t%s", x[i], r.mode, r.size, (long) r.time, r.name1); | 
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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
 
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101 if (r.name2 != null) { | 
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102 System.out.printf(" --> %s", r.name2); | 
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103 } | 
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104 System.out.println(); | 
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105 } | 
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106 System.out.println(); | 
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107 } | 
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108 } | 
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109 | 
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110 private static class Record { | 
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111 final int mode; | 
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112 final int size; | 
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113 final int time; | 
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114 final String name1; | 
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115 final String name2; | 
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116 | 
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117 public Record(int fmode, int fsize, int ftime, String name1, String name2) { | 
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118 mode = fmode; | 
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119 size = fsize; | 
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120 time = ftime; | 
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121 this.name1 = name1; | 
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122 this.name2 = name2; | 
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123 | 
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124 } | 
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125 } | 
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126 } | 
