ODBC generic nulls, added Row and RowIterator

Data/src/RowIterator.cpp

@@ -0,0 +1,118 @@
+//
+// RowIterator.cpp
+//
+// $Id: //poco/Main/Data/src/RowIterator.cpp#2 $
+//
+// Library: Data
+// Package: DataCore
+// Module:  RowIterator
+//
+// 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.
+//
+
+
+#include "Poco/Data/RowIterator.h"
+#include "Poco/Data/RecordSet.h"
+#undef min
+#undef max
+#include <limits>
+
+
+namespace Poco {
+namespace Data {
+
+
+const int RowIterator::POSITION_END = std::numeric_limits<std::size_t>::max();
+
+
+RowIterator::RowIterator(const RecordSet& recordSet, bool isEmpty): 
+	_position(isEmpty ? POSITION_END : 0),
+	_recordSet(recordSet)
+{
+}
+
+
+RowIterator::~RowIterator()
+{
+}
+
+
+void RowIterator::increment()
+{
+	if (POSITION_END == _position)
+		throw RangeException("End of iterator reached.");
+
+	if (_position < _recordSet.rowCount() - 1)
+		++_position;
+	else
+		_position = POSITION_END;
+}
+
+
+void RowIterator::decrement()
+{
+	if (0 == _position)
+		throw RangeException("End of iterator reached.");
+
+	--_position;
+}
+
+
+const Row& RowIterator::operator * () const
+{
+	return _recordSet.row(_position);
+}
+
+
+const Row& RowIterator::operator ++ ()
+{
+	increment();
+	return _recordSet.row(_position);
+}
+
+
+const Row& RowIterator::operator ++ (int)
+{
+	increment();
+	return _recordSet.row(_position - 1);
+}
+
+
+const Row& RowIterator::operator -- ()
+{
+	decrement();
+	return _recordSet.row(_position);
+}
+
+
+const Row& RowIterator::operator -- (int)
+{
+	decrement();
+	return _recordSet.row(_position + 1);
+}
+
+
+} } // namespace Poco::Data