src/sql/kernel/qsqlnulldriver_p.h

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  41
  42 #ifndef QSQLNULLDRIVER_P_H
  43 #define QSQLNULLDRIVER_P_H
  44
  45 //
  46 //  W A R N I N G
  47 //  -------------
  48 //
  49 // This file is not part of the Qt API.  This header file may
  50 // change from version to version without notice, or even be
  51 // removed.
  52 //
  53 // We mean it.
  54 //
  55
  56 #include "QtCore/qvariant.h"
  57 #include "QtSql/qsqldriver.h"
  58 #include "QtSql/qsqlerror.h"
  59 #include "QtSql/qsqlresult.h"
  60
  61 QT_BEGIN_NAMESPACE
  62
  63 class QSqlNullResult : public QSqlResult
  64 {
  65 public:
  66     inline explicit QSqlNullResult(const QSqlDriver* d): QSqlResult(d)
  67     { QSqlResult::setLastError(
  68             QSqlError(QLatin1String("Driver not loaded"), QLatin1String("Driver not loaded"), QSqlError::ConnectionError)); }
  69 protected:
  70     inline QVariant data(int) { return QVariant(); }
  71     inline bool reset (const QString&) { return false; }
  72     inline bool fetch(int) { return false; }
  73     inline bool fetchFirst() { return false; }
  74     inline bool fetchLast() { return false; }
  75     inline bool isNull(int) { return false; }
  76     inline int size()  { return -1; }
  77     inline int numRowsAffected() { return 0; }
  78
  79     inline void setAt(int) {}
  80     inline void setActive(bool) {}
  81     inline void setLastError(const QSqlError&) {}
  82     inline void setQuery(const QString&) {}
  83     inline void setSelect(bool) {}
  84     inline void setForwardOnly(bool) {}
  85
  86     inline bool exec() { return false; }
  87     inline bool prepare(const QString&) { return false; }
  88     inline bool savePrepare(const QString&) { return false; }
  89     inline void bindValue(int, const QVariant&, QSql::ParamType) {}
  90     inline void bindValue(const QString&, const QVariant&, QSql::ParamType) {}
  91 };
  92
  93 class QSqlNullDriver : public QSqlDriver
  94 {
  95 public:
  96     inline QSqlNullDriver(): QSqlDriver()
  97     { QSqlDriver::setLastError(
  98             QSqlError(QLatin1String("Driver not loaded"), QLatin1String("Driver not loaded"), QSqlError::ConnectionError)); }
  99     inline bool hasFeature(DriverFeature) const { return false; }
 100     inline bool open(const QString &, const QString & , const QString & ,
 101               const QString &, int, const QString&)
 102     { return false; }
 103     inline void close() {}
 104     inline QSqlResult *createResult() const { return new QSqlNullResult(this); }
 105
 106 protected:
 107     inline void setOpen(bool) {}
 108     inline void setOpenError(bool) {}
 109     inline void setLastError(const QSqlError&) {}
 110 };
 111
 112 QT_END_NAMESPACE
 113
 114 #endif // QSQLNULLDRIVER_P_H