Mercurial > dedupe

annotate FileDBLink.cpp @ 38:7905fa8a3f1b

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Test for empty string.
author Tom Fredrik Blenning Klaussen <bfg@blenning.no>
date Fri, 07 Sep 2012 13:07:46 +0200
parents fda70a362ed5
children f711ddb56ae7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9
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1 #include "EditDistance.hpp"
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2 #include "FileDBLink.hpp"
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3 #include "Exception/PermissionException.hpp"
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4
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5
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6 #include <QtCore/QtConcurrentMap>
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7
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8 #include <boost/bind.hpp>
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9
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10 #include <algorithm>
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11 #include <cassert>
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12 #include <functional>
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13 #include <iostream>
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14
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15 void FileDBLink::updateIfModified(const QString& path)
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16 {
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17 QFileInfo fileinfo(path);
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18 FileDBLink::DBStatus status = existsWithMtime(path, fileinfo.lastModified());
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19
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20 switch (status) {
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21 case FileDBLink::NONE: {
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22 addFile(fileinfo);
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23 break;
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24 }
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25 case FileDBLink::MTIME_DIFFERENT: {
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26 updateFile(fileinfo);
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27 }
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28 default: {
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29 }
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30 }
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31 }
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32
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33 void FileDBLink::addFile(const QFileInfo& fileinfo)
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34 {
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35 addFile(fileinfo.absoluteFilePath(), fileinfo.size(), fileinfo.lastModified());
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36 }
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37
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38 QByteArray FileDBLink::computeHash(const QString& path, QCryptographicHash::Algorithm algorithm)
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39 {
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40 const static uint buffersize = 32768;
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41 QCryptographicHash hash(algorithm);
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42 QFile file(path);
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43 if ( file.open( QIODevice::ReadOnly ) ) {
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44 while(!file.atEnd()){
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45 hash.addData(file.read(buffersize));
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46 }
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47 }
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48 else {
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49 QString errorMsg = path + ": " + file.errorString();
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50
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51 switch (file.error()) {
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52 case QFile::PermissionsError:
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53 throw PermissionException(errorMsg);
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54 default:
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55 throw IOException(errorMsg);
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56 }
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57 }
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58 return hash.result();
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59 }
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61
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62 void FileDBLink::addFile(const QString& path, qint64 size, const QDateTime& lastModified)
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63 {
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64 addFile(path, size, lastModified, computeHash(path));
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65 }
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66
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67 void FileDBLink::updateFile(const QFileInfo& fileinfo)
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68 {
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69 updateFile(fileinfo.absoluteFilePath(), fileinfo.size(), fileinfo.lastModified());
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70 }
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71
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72 void FileDBLink::updateFile(const QString& path, qint64 size, const QDateTime& lastModified)
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73 {
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74 updateFile(path, size, lastModified, computeHash(path));
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75 }
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76
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77 const QList<QSharedPointer<FileDBLink::DBInfo> > FileDBLink::sortOn(const QString& prefix, SORTORDER order, bool extended)
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78 {
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79 QList<QSharedPointer<DBInfo> > list = (extended) ? computedValues(prefix) : values(prefix);
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80
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81 switch (order) {
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82 case PATH:
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83 {
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84 QList<QSharedPointer<FileDBLink::DBInfo> > oList;
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85 foreach(QSharedPointer<DBInfo> info, list) {
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86 oList.push_back(info);
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87 }
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88 return oList;
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89 }
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90 case SIZE:
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91 {
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92 QMultiMap<quint64, QSharedPointer<DBInfo> > oList;
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93 foreach(QSharedPointer<DBInfo> info, list) {
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94 oList.insert(info->size(), info);
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95 }
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96 return oList.values();
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97 }
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98 case MTIME:
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99 {
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100 QMultiMap<QDateTime, QSharedPointer<DBInfo> > oList;
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101 foreach(QSharedPointer<DBInfo> info, list) {
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102 oList.insert(info->mtime(), info);
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103 }
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104 return oList.values();
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105 }
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106 case CHECKSUM:
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107 {
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108 QMultiMap<QByteArray, QSharedPointer<DBInfo> > oList;
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109 foreach(QSharedPointer<DBInfo> info, list) {
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110 oList.insert(info->checksum(), info);
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111 }
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112 return oList.values();
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113 }
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114 case EDIT:
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115 {
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116 assert(extended);
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117 QMultiMap<int, QSharedPointer<DBInfo> > oList;
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118 foreach(QSharedPointer<DBInfo> info, list) {
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119 QSharedPointer<ExtendedDBInfo> ptr;
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120 ptr = info.dynamicCast<ExtendedDBInfo>();
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121 oList.insert(ptr->editDistance(), info);
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122 }
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123 return oList.values();
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124
0
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125 }
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126 }
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127 abort();
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128 }
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129
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130 QSharedPointer<FileDBLink::DBInfo> FileDBLink::computedValue(const QSharedPointer<DBInfo>& info,
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131 const QList<QSharedPointer<DBInfo> >& entries)
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132 {
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133 QString p1 = info->name();
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134 int minDist = 100000;
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135 QString other;
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136 for (QList<QSharedPointer<DBInfo> >::const_iterator it2 = entries.begin();
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137 it2 != entries.end(); ++it2) {
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138 if (info == *it2)
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139 continue;
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140 QString p2 = (*it2)->name();
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141 int dist = EditDistance::Compute(p1, p2, false);
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142 if (dist < minDist) {
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143 minDist = dist;
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144 other = (*it2)->path();
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145 }
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146 }
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147 return QSharedPointer<DBInfo>(new ExtendedDBInfo(*info, other, minDist));
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148 }
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149
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150 const QList<QSharedPointer<FileDBLink::DBInfo> > FileDBLink::computedValues(const QString& prefix) const
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151 {
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152 QList<QSharedPointer<DBInfo> > list;
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153 QList<QSharedPointer<DBInfo> > entries = values(prefix);
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154
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155 #if 1
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156 list = QtConcurrent::blockingMapped(entries, boost::bind( &FileDBLink::computedValue, _1, entries));
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157 #else
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158 for (QList<QSharedPointer<DBInfo> >::const_iterator it1 = entries.begin();
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159 it1 != entries.end(); ++it1) {
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160 QSharedPointer<DBInfo> ext = computedValue(*it1, entries);
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161 list.push_back(ext);
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162 }
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163 #endif
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164 return list;
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165 }