/usr/include/Poco/Data/AbstractExtraction.h is in libpoco-dev 1.3.6p1-5+deb8u1.
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// AbstractExtraction.h
//
// $Id: //poco/1.3/Data/include/Poco/Data/AbstractExtraction.h#1 $
//
// Library: Data
// Package: DataCore
// Module: AbstractExtraction
//
// Definition of the AbstractExtraction 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_AbstractExtraction_INCLUDED
#define Data_AbstractExtraction_INCLUDED
#include "Poco/Data/Data.h"
#include "Poco/Data/AbstractExtractor.h"
#include "Poco/Data/Limit.h"
#include "Poco/RefCountedObject.h"
#include "Poco/AutoPtr.h"
#include <vector>
#include <cstddef>
namespace Poco {
namespace Data {
class AbstractPrepare;
class AbstractPreparation;
class Data_API AbstractExtraction: public Poco::RefCountedObject
/// AbstractExtraction is the interface class that connects output positions to concrete values
/// retrieved via an AbstractExtractor.
{
public:
AbstractExtraction(Poco::UInt32 limit = Limit::LIMIT_UNLIMITED);
/// Creates the AbstractExtraction. A limit value equal to EXTRACT_UNLIMITED (0xffffffffu)
/// means that we extract as much data as possible during one execute.
/// Otherwise the limit value is used to partition data extracting to a limited amount of rows.
virtual ~AbstractExtraction();
/// Destroys the AbstractExtraction.
void setExtractor(AbstractExtractor* pExtractor);
/// Sets the class used for extracting the data. Does not take ownership of the pointer.
AbstractExtractor* getExtractor() const;
/// Retrieves the extractor object
virtual std::size_t numOfColumnsHandled() const = 0;
/// Returns the number of columns that the extraction handles.
///
/// The trivial case will be one single column but when
/// complex types are used this value can be larger than one.
virtual std::size_t numOfRowsHandled() const = 0;
/// Returns the number of rows that the extraction handles.
///
/// The trivial case will be one single row but
/// for collection data types (ie vector) it can be larger.
virtual std::size_t numOfRowsAllowed() const = 0;
/// Returns the upper limit on number of rows that the extraction will handle.
virtual void extract(std::size_t pos) = 0;
/// Extracts a value from the param, starting at the given column position.
virtual void reset() = 0;
/// Resets the etxractor so that it can be re-used.
virtual AbstractPrepare* createPrepareObject(AbstractPreparation* pPrep, std::size_t pos) const = 0;
/// Creates a Prepare object for the etxracting object
void setLimit(Poco::UInt32 limit);
/// Sets the limit.
Poco::UInt32 getLimit() const;
/// Gets the limit.
private:
AbstractExtractor* _pExtractor;
Poco::UInt32 _limit;
};
typedef Poco::AutoPtr<AbstractExtraction> AbstractExtractionPtr;
typedef std::vector<AbstractExtractionPtr> AbstractExtractionVec;
//
// inlines
//
inline void AbstractExtraction::setExtractor(AbstractExtractor* pExtractor)
{
_pExtractor = pExtractor;
}
inline AbstractExtractor* AbstractExtraction::getExtractor() const
{
return _pExtractor;
}
inline void AbstractExtraction::setLimit(Poco::UInt32 limit)
{
_limit = limit;
}
inline Poco::UInt32 AbstractExtraction::getLimit() const
{
return _limit;
}
} } // namespace Poco::Data
#endif // Data_AbstractExtraction_INCLUDED
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