Library: Data
Package: DataCore
Header: Poco/Data/AbstractExtractor.h
Description
Interface used to extract data from a single result row. If an extractor receives null it is not allowed to change val!
Inheritance
Known Derived Classes: Poco::Data::ODBC::Extractor, Poco::Data::MySQL::Extractor, Poco::Data::SQLite::Extractor
Member Summary
Member Functions: extract
Constructors
AbstractExtractor
Creates the AbstractExtractor.
Destructor
~AbstractExtractor 
virtual ~AbstractExtractor();
Destroys the AbstractExtractor.
Member Functions
extract
virtual bool extract(
std::size_t pos,
Poco::Int8 & val
) = 0;
Extracts an Int8. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::UInt8 & val
) = 0;
Extracts an UInt8. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::Int16 & val
) = 0;
Extracts an Int16. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::UInt16 & val
) = 0;
Extracts an UInt16. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::Int32 & val
) = 0;
Extracts an Int32. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::UInt32 & val
) = 0;
Extracts an UInt32. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::Int64 & val
) = 0;
Extracts an Int64. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
Poco::UInt64 & val
) = 0;
Extracts an UInt64. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
bool & val
) = 0;
Extracts a boolean. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
float & val
) = 0;
Extracts a float. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
double & val
) = 0;
Extracts a double. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
char & val
) = 0;
Extracts a single character. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
std::string & val
) = 0;
Extracts a string. Returns false if null was received.
extract
virtual bool extract(
std::size_t pos,
BLOB & val
) = 0;
Extracts a BLOB. Returns false if null was received.