Mercurial > dedupe

annotate FileDBLink.hpp @ 108:e9b798e80bad

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Setup prepared begin, end queries. Support for more effective delete statement.
author Tom Fredrik Blenning Klaussen <bfg@bfgconsult.no>
date Tue, 18 Feb 2014 17:08:06 +0100
parents 6bc013d5788b
children
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1 #ifndef FILEDBLINK
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2 #define FILEDBLINK
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3
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4 #include <QtCore/QCryptographicHash>
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5 #include <QtCore/QDateTime>
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6 #include <QtCore/QFileInfo>
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7
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8 class FileDBLink : public QObject {
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9 Q_OBJECT
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10 public:
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11 class DBInfo {
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12 public:
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13 DBInfo(const QString& path, quint64 size,
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14 const QDateTime& mtime, const QByteArray& hash) : path_(path),
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15 size_(size),
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16 mtime_(mtime),
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17 hash_(hash)
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18 {}
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19 DBInfo() {}
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20
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21 virtual ~DBInfo() {}
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22
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23 const QString& path() const
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24 {
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25 return path_;
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26 }
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27
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28 QString name() const
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29 {
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30 QFileInfo finf(path());
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31 return finf.fileName();
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32 }
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33
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34 quint64 size() const
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35 {
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36 return size_;
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37 }
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38
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39 const QDateTime& mtime() const
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40 {
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41 return mtime_;
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42 }
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43
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44 const QByteArray checksum() const
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45 {
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46 return hash_;
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47 }
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48
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49 virtual QString serialize() const
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50 {
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51 QString size = QString::number(size_);
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52 QString str = path_;
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53 str += ", " + size;
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54 str += ", " + mtime_.toString();
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55 str += ", " + hash_.toHex();
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56 return str;
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57 }
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58
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59 private:
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60 QString path_;
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61 quint64 size_;
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62 QDateTime mtime_;
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63 QByteArray hash_;
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64 };
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65
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66 class ExtendedDBInfo : public DBInfo {
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67 public:
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68 ExtendedDBInfo(const DBInfo& dbinfo,
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69 const QString& closestEditPath,
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70 int editDistance) :
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71 DBInfo(dbinfo),
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72 closestEditPath_(closestEditPath),
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73 editDistance_(editDistance)
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74 {
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75 }
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76 ExtendedDBInfo()
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77 {
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78 }
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80 virtual ~ExtendedDBInfo()
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81 {
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82 }
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83
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84 virtual QString serialize() const
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85 {
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86 QString dist = QString::number(editDistance_);
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87 QString str = DBInfo::serialize();
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88 str += ", " + closestEditPath_;
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89 str += ", " + dist;
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90 return str;
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91 }
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92
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93 int editDistance() const
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94 {
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95 return editDistance_;
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96 }
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97
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98 private:
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99 QString closestEditPath_;
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100 int editDistance_;
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101 };
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102 typedef QSharedPointer<DBInfo> dbinf_ptr_t;
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103
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104 static dbinf_ptr_t
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105 computedValue(const dbinf_ptr_t& info,
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106 const QList<dbinf_ptr_t >&);
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107
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108 static QByteArray
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109 computeHash(const QString& path,
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110 QCryptographicHash::Algorithm = QCryptographicHash::Sha1);
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112 signals:
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113 void progressUpdate(int, int);
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114
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115 public:
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116 enum DBStatus { NONE = 0, MTIME_DIFFERENT, SAME};
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117
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118 virtual ~FileDBLink();
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120 void updateIfModified(const QString& path, bool lazy = false);
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121
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122 virtual void addFile(const QString& path, quint64 size,
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123 const QDateTime& dtime, const QByteArray& hash,
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124 bool lazy) = 0;
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125 virtual void keepOnlyFromPrefix(const QString& prefix,
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126 const QStringList& files,
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127 bool lazy = false) = 0;
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128 virtual void deleteFileFromDB(const QString& path, bool lazy = false) = 0;
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129
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130 virtual const QList<dbinf_ptr_t> filesWithSize(quint64 size, const QString& prefix = QString()) const;
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132 bool updateAllWithSize(quint64 size);
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134 virtual dbinf_ptr_t value(const QString& path) const;
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136 void addFile(const QString& path, quint64 size, const QDateTime& dtime, bool lazy = false);
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137 void addFile(const QFileInfo& fileinfo, bool lazy = false);
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138
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139 virtual void updateFile(const QString& path, quint64 size,
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140 const QDateTime& dtime, const QByteArray& hash,
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141 bool lazy = false) = 0;
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142 void updateFile(const QString& path, quint64 size, const QDateTime& dtime, bool lazy = false);
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143 void updateFile(const QFileInfo& fileinfo, bool lazy = false);
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144
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145 virtual bool exists(const QString& path) = 0;
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146 virtual DBStatus existsWithMtime(const QString& path,
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147 const QDateTime& mtime) = 0;
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148
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149 virtual bool commit(const QString& prefix = QString(), bool dirty = true);
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150 virtual const QList<dbinf_ptr_t>
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151 values(const QString& prefix = QString() ) const = 0;
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152
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153 virtual const QList<dbinf_ptr_t>
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154 computedValues(const QString& prefix = QString() ) const;
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155
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156 enum SORTORDER { PATH, SIZE, MTIME, CHECKSUM, EDIT };
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157
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158 virtual const QList<dbinf_ptr_t>
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159 sortOn(const QString& prefix, SORTORDER order, bool extended = false);
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160 };
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161
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162 #endif //FILEDBLINK