Mercurial > jhg

annotate src/com/tmate/hgkit/ll/HgDirstate.java @ 64:19e9e220bf68

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Convenient commands constitute hi-level API. org.tmatesoft namespace, GPL2 statement
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 21 Jan 2011 05:56:43 +0100
parents b771e94a4f7c
children
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.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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22
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23 private final DataAccessProvider accessProvider;
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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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29
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30 /*package-local*/ HgDirstate() {
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31 // empty instance
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32 accessProvider = null;
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33 dirstateFile = null;
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34 }
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36 public HgDirstate(DataAccessProvider dap, File dirstate) {
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37 accessProvider = dap;
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38 dirstateFile = dirstate;
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39 }
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40
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41 private void read() {
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42 normal = added = removed = merged = Collections.<String, Record>emptyMap();
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43 if (dirstateFile == null || !dirstateFile.exists()) {
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44 return;
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45 }
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46 DataAccess da = accessProvider.create(dirstateFile);
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47 if (da.isEmpty()) {
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48 return;
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49 }
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50 // not sure linked is really needed here, just for ease of debug
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51 normal = new LinkedHashMap<String, Record>();
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52 added = new LinkedHashMap<String, Record>();
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53 removed = new LinkedHashMap<String, Record>();
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54 merged = new LinkedHashMap<String, Record>();
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55 try {
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56 // XXX skip(40) if we don't need these?
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57 byte[] parents = new byte[40];
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58 da.readBytes(parents, 0, 40);
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59 parents = null;
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60 do {
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61 final byte state = da.readByte();
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62 final int fmode = da.readInt();
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63 final int size = da.readInt();
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64 final int time = da.readInt();
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65 final int nameLen = da.readInt();
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66 String fn1 = null, fn2 = null;
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67 byte[] name = new byte[nameLen];
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68 da.readBytes(name, 0, nameLen);
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69 for (int i = 0; i < nameLen; i++) {
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70 if (name[i] == 0) {
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71 fn1 = new String(name, 0, i, "UTF-8"); // XXX unclear from documentation what encoding is used there
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72 fn2 = new String(name, i+1, nameLen - i - 1, "UTF-8"); // need to check with different system codepages
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73 break;
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74 }
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75 }
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76 if (fn1 == null) {
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77 fn1 = new String(name);
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78 }
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79 Record r = new Record(fmode, size, time, fn1, fn2);
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80 if (state == 'n') {
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81 normal.put(r.name1, r);
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82 } else if (state == 'a') {
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83 added.put(r.name1, r);
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84 } else if (state == 'r') {
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85 removed.put(r.name1, r);
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86 } else if (state == 'm') {
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87 merged.put(r.name1, r);
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88 } else {
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89 // FIXME log error?
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90 }
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91 } while (!da.isEmpty());
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92 } catch (IOException ex) {
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93 ex.printStackTrace(); // FIXME log error, clean dirstate?
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94 } finally {
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95 da.done();
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96 }
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97 }
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98
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99 // new, modifiable collection
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100 /*package-local*/ TreeSet<String> all() {
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101 read();
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102 TreeSet<String> rv = new TreeSet<String>();
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103 @SuppressWarnings("unchecked")
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104 Map<String, Record>[] all = new Map[] { normal, added, removed, merged };
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105 for (int i = 0; i < all.length; i++) {
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106 for (Record r : all[i].values()) {
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107 rv.add(r.name1);
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108 }
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109 }
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110 return rv;
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111 }
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112
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113 /*package-local*/ Record checkNormal(String fname) {
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114 return normal.get(fname);
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115 }
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116
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117 /*package-local*/ Record checkAdded(String fname) {
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118 return added.get(fname);
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119 }
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120 /*package-local*/ Record checkRemoved(String fname) {
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121 return removed.get(fname);
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122 }
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123 /*package-local*/ Record checkMerged(String fname) {
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124 return merged.get(fname);
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125 }
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126
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127
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128
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129
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130 public void dump() {
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131 read();
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132 @SuppressWarnings("unchecked")
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133 Map<String, Record>[] all = new Map[] { normal, added, removed, merged };
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134 char[] x = new char[] {'n', 'a', 'r', 'm' };
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135 for (int i = 0; i < all.length; i++) {
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136 for (Record r : all[i].values()) {
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137 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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138 if (r.name2 != null) {
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139 System.out.printf(" --> %s", r.name2);
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140 }
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141 System.out.println();
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142 }
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143 System.out.println();
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144 }
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145 }
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146
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147 /*package-local*/ static class Record {
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148 final int mode;
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149 final int size;
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150 final int time;
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151 final String name1;
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152 final String name2;
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153
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154 public Record(int fmode, int fsize, int ftime, String name1, String name2) {
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155 mode = fmode;
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156 size = fsize;
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157 time = ftime;
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158 this.name1 = name1;
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159 this.name2 = name2;
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160
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161 }
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162 }
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163 }