mirror of
https://github.com/pocoproject/poco.git
synced 2025-07-05 10:00:01 +02:00
113 lines
4.0 KiB
C++
113 lines
4.0 KiB
C++
//
|
|
// AbstractExtractor.h
|
|
//
|
|
// $Id: //poco/Main/Data/include/Poco/Data/AbstractExtractor.h#8 $
|
|
//
|
|
// Library: Data
|
|
// Package: DataCore
|
|
// Module: AbstractExtractor
|
|
//
|
|
// Definition of the AbstractExtractor class.
|
|
//
|
|
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Data_AbstractExtractor_INCLUDED
|
|
#define Data_AbstractExtractor_INCLUDED
|
|
|
|
|
|
#include "Poco/Data/Data.h"
|
|
#include <cstddef>
|
|
|
|
|
|
namespace Poco {
|
|
namespace Data {
|
|
|
|
|
|
class BLOB;
|
|
|
|
|
|
class Data_API AbstractExtractor
|
|
/// Interface used to extract data from a single result row.
|
|
/// If an extractor receives null it is not allowed to change val!
|
|
{
|
|
public:
|
|
AbstractExtractor();
|
|
/// Creates the AbstractExtractor.
|
|
|
|
virtual ~AbstractExtractor();
|
|
/// Destroys the AbstractExtractor.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::Int8& val) = 0;
|
|
/// Extracts an Int8. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::UInt8& val) = 0;
|
|
/// Extracts an UInt8. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::Int16& val) = 0;
|
|
/// Extracts an Int16. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::UInt16& val) = 0;
|
|
/// Extracts an UInt16. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::Int32& val) = 0;
|
|
/// Extracts an Int32. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::UInt32& val) = 0;
|
|
/// Extracts an UInt32. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::Int64& val) = 0;
|
|
/// Extracts an Int64. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, Poco::UInt64& val) = 0;
|
|
/// Extracts an UInt64. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, bool& val) = 0;
|
|
/// Extracts a boolean. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, float& val) = 0;
|
|
/// Extracts a float. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, double& val) = 0;
|
|
/// Extracts a double. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, char& val) = 0;
|
|
/// Extracts a single character. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, std::string& val) = 0;
|
|
/// Extracts a string. Returns false if null was received.
|
|
|
|
virtual bool extract(std::size_t pos, BLOB& val) = 0;
|
|
/// Extracts a BLOB. Returns false if null was received.
|
|
};
|
|
|
|
|
|
} } // namespace Poco::Data
|
|
|
|
|
|
#endif // Data_AbstractExtractor_INCLUDED
|