Mercurial > hg4j

annotate src/com/tmate/hgkit/ll/HgDirstate.java @ 24:d4fdd1845b3f

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Nodeid with array of exactly 20 bytes
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 06 Jan 2011 04:42:15 +0100
parents 02ee376bee79
children b771e94a4f7c
rev   line source
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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.File;
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7 import java.io.IOException;
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8 import java.util.Collections;
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9 import java.util.LinkedHashMap;
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10 import java.util.Map;
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11 import java.util.TreeSet;
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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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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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21 public class HgDirstate {
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23 private final LocalHgRepo repo;
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24 private final File dirstateFile;
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25 private Map<String, Record> normal;
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26 private Map<String, Record> added;
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27 private Map<String, Record> removed;
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28 private Map<String, Record> merged;
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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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33 }
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34
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35 private void read() {
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36 normal = added = removed = merged = Collections.<String, Record>emptyMap();
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37 if (!dirstateFile.exists()) {
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38 return;
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39 }
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40 DataAccessProvider dap = repo.getDataAccess();
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41 DataAccess da = dap.create(dirstateFile);
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42 if (da.isEmpty()) {
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43 return;
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44 }
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45 // not sure linked is really needed here, just for ease of debug
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46 normal = new LinkedHashMap<String, Record>();
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47 added = new LinkedHashMap<String, Record>();
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48 removed = new LinkedHashMap<String, Record>();
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49 merged = new LinkedHashMap<String, Record>();
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50 try {
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51 // XXX skip(40) if we don't need these?
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52 byte[] parents = new byte[40];
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53 da.readBytes(parents, 0, 40);
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54 parents = null;
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55 do {
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56 final byte state = da.readByte();
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57 final int fmode = da.readInt();
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58 final int size = da.readInt();
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59 final int time = da.readInt();
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60 final int nameLen = da.readInt();
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61 String fn1 = null, fn2 = null;
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62 byte[] name = new byte[nameLen];
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63 da.readBytes(name, 0, nameLen);
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64 for (int i = 0; i < nameLen; i++) {
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65 if (name[i] == 0) {
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66 fn1 = new String(name, 0, i, "UTF-8"); // XXX unclear from documentation what encoding is used there
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67 fn2 = new String(name, i+1, nameLen - i - 1, "UTF-8"); // need to check with different system codepages
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68 break;
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69 }
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70 }
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71 if (fn1 == null) {
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72 fn1 = new String(name);
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73 }
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74 Record r = new Record(fmode, size, time, fn1, fn2);
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75 if (state == 'n') {
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76 normal.put(r.name1, r);
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77 } else if (state == 'a') {
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78 added.put(r.name1, r);
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79 } else if (state == 'r') {
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80 removed.put(r.name1, r);
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81 } else if (state == 'm') {
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82 merged.put(r.name1, r);
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83 } else {
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84 // FIXME log error?
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85 }
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86 } while (!da.isEmpty());
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87 } catch (IOException ex) {
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88 ex.printStackTrace(); // FIXME log error, clean dirstate?
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89 } finally {
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90 da.done();
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91 }
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92 }
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93
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94 // new, modifiable collection
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95 /*package-local*/ TreeSet<String> all() {
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96 read();
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97 TreeSet<String> rv = new TreeSet<String>();
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98 @SuppressWarnings("unchecked")
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99 Map<String, Record>[] all = new Map[] { normal, added, removed, merged };
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100 for (int i = 0; i < all.length; i++) {
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101 for (Record r : all[i].values()) {
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102 rv.add(r.name1);
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103 }
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104 }
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105 return rv;
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106 }
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107
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108 /*package-local*/ Record checkNormal(String fname) {
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109 return normal.get(fname);
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110 }
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111
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112 /*package-local*/ Record checkAdded(String fname) {
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113 return added.get(fname);
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114 }
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115 /*package-local*/ Record checkRemoved(String fname) {
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116 return removed.get(fname);
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117 }
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118 /*package-local*/ Record checkMerged(String fname) {
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119 return merged.get(fname);
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120 }
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121
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122
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123
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124
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125 public void dump() {
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126 read();
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127 @SuppressWarnings("unchecked")
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128 Map<String, Record>[] all = new Map[] { normal, added, removed, merged };
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129 char[] x = new char[] {'n', 'a', 'r', 'm' };
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130 for (int i = 0; i < all.length; i++) {
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131 for (Record r : all[i].values()) {
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132 System.out.printf("%c %3o%6d %30tc\t\t%s", x[i], r.mode, r.size, (long) r.time * 1000, r.name1);
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133 if (r.name2 != null) {
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134 System.out.printf(" --> %s", r.name2);
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135 }
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136 System.out.println();
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137 }
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138 System.out.println();
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139 }
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140 }
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141
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142 /*package-local*/ static class Record {
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143 final int mode;
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144 final int size;
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145 final int time;
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146 final String name1;
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147 final String name2;
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148
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149 public Record(int fmode, int fsize, int ftime, String name1, String name2) {
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150 mode = fmode;
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151 size = fsize;
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152 time = ftime;
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153 this.name1 = name1;
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154 this.name2 = name2;
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155
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156 }
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157 }
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158 }