mirror of
https://github.com/VCMP-SqMod/SqMod.git
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4a6bfc086c
Switched to POCO library for unified platform/library interface. Deprecated the external module API. It was creating more problems than solving. Removed most built-in libraries in favor of system libraries for easier maintenance. Cleaned and secured code with help from static analyzers.
156 lines
3.6 KiB
C++
156 lines
3.6 KiB
C++
//
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// RowIterator.h
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//
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// Library: Data
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// Package: DataCore
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// Module: RowIterator
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//
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// Definition of the RowIterator class.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Data_RowIterator_INCLUDED
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#define Data_RowIterator_INCLUDED
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#include "Poco/Data/Data.h"
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#include "Poco/Data/Row.h"
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#include "Poco/Dynamic/Var.h"
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#include <iterator>
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#include <algorithm>
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namespace Poco {
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namespace Data {
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class RecordSet;
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class Data_API RowIterator
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/// RowIterator class.
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{
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public:
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = Row;
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using difference_type = std::ptrdiff_t;
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using pointer = Row*;
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using reference = Row&;
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static const std::size_t POSITION_END;
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/// End position indicator.
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RowIterator(RecordSet* pRecordSet, bool positionEnd);
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/// Creates the RowIterator and positions it at the end of
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/// the recordset if positionEnd is true. Otherwise, it is
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/// positioned at the beginning.
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RowIterator(const RowIterator& other);
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/// Creates a copy of other RowIterator.
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RowIterator(RowIterator&& other) noexcept;
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/// Move constructor.
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~RowIterator();
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/// Destroys the RowIterator.
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RowIterator& operator = (const RowIterator& other);
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/// Assigns the other RowIterator.
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RowIterator& operator = (RowIterator&& other) noexcept;
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/// Move assignment.
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bool operator == (const RowIterator& other) const;
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/// Equality operator.
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bool operator != (const RowIterator& other) const;
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/// Inequality operator.
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Row& operator * () const;
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/// Returns reference to the current row.
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Row* operator -> () const;
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/// Returns pointer to the current row.
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const RowIterator& operator ++ () const;
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/// Advances by one position and returns current position.
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RowIterator operator ++ (int) const;
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/// Advances by one position and returns copy of the iterator with
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/// previous current position.
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const RowIterator& operator -- () const;
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/// Goes back by one position and returns copy of the iterator with
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/// previous current position.
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RowIterator operator -- (int) const;
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/// Goes back by one position and returns previous current position.
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RowIterator operator + (std::size_t diff) const;
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/// Returns a copy the RowIterator advanced by diff positions.
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RowIterator operator - (std::size_t diff) const;
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/// Returns a copy the RowIterator backed by diff positions.
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/// Throws RangeException if diff is larger than current position.
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void swap(RowIterator& other);
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/// Swaps the RowIterator with another one.
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private:
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RowIterator();
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void increment() const;
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/// Increments the iterator position by one.
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/// Throws RangeException if position is out of range.
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void decrement() const;
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/// Decrements the iterator position by one.
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/// Throws RangeException if position is out of range.
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void setPosition(std::size_t pos) const;
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/// Sets the iterator position.
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/// Throws RangeException if position is out of range.
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RecordSet* _pRecordSet;
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mutable std::size_t _position;
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};
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///
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/// inlines
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///
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inline bool RowIterator::operator == (const RowIterator& other) const
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{
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return _pRecordSet == other._pRecordSet && _position == other._position;
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}
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inline bool RowIterator::operator != (const RowIterator& other) const
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{
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return _pRecordSet != other._pRecordSet || _position != other._position;
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}
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} } // namespace Poco::Data
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namespace std
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{
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template<>
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inline void swap<Poco::Data::RowIterator>(Poco::Data::RowIterator& s1, Poco::Data::RowIterator& s2) noexcept
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/// Full template specalization of std:::swap for RowIterator
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{
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s1.swap(s2);
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}
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}
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#endif // Data_RowIterator_INCLUDED
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