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https://github.com/pocoproject/poco.git
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390 lines
11 KiB
C++
390 lines
11 KiB
C++
//
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// RecordSet.cpp
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//
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// $Id: //poco/Main/Data/src/RecordSet.cpp#2 $
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//
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// Library: Data
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// Package: DataCore
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// Module: RecordSet
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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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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/Data/RecordSet.h"
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#include "Poco/Data/RowFilter.h"
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#include "Poco/Data/Date.h"
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#include "Poco/Data/Time.h"
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#include "Poco/Data/DataException.h"
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#include "Poco/DateTime.h"
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using namespace Poco::Data::Keywords;
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using Poco::DateTime;
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namespace Poco {
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namespace Data {
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const std::size_t RecordSet::UNKNOWN_TOTAL_ROW_COUNT = std::numeric_limits<std::size_t>::max();
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RecordSet::RecordSet(const Statement& rStatement,
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RowFormatter::Ptr pRowFormatter):
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Statement(rStatement),
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_currentRow(0),
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_pBegin(new RowIterator(this, 0 == rowsExtracted())),
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_pEnd(new RowIterator(this, true)),
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_pFilter(0),
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_totalRowCount(UNKNOWN_TOTAL_ROW_COUNT)
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{
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if (pRowFormatter) setRowFormatter(pRowFormatter);
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}
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RecordSet::RecordSet(Session& rSession,
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const std::string& query,
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RowFormatter::Ptr pRowFormatter):
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Statement((rSession << query, now)),
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_currentRow(0),
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_pBegin(new RowIterator(this, 0 == rowsExtracted())),
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_pEnd(new RowIterator(this, true)),
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_pFilter(0),
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_totalRowCount(UNKNOWN_TOTAL_ROW_COUNT)
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{
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if (pRowFormatter) setRowFormatter(pRowFormatter);
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}
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RecordSet::RecordSet(const RecordSet& other):
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Statement(other.impl()),
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_currentRow(other._currentRow),
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_pBegin(new RowIterator(this, 0 == rowsExtracted())),
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_pEnd(new RowIterator(this, true)),
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_pFilter(other._pFilter),
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_totalRowCount(other._totalRowCount)
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{
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}
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RecordSet::~RecordSet()
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{
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delete _pBegin;
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delete _pEnd;
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if(_pFilter) _pFilter->release();
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RowMap::iterator it = _rowMap.begin();
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RowMap::iterator end = _rowMap.end();
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for (; it != end; ++it) delete it->second;
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}
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Poco::Dynamic::Var RecordSet::value(std::size_t col, std::size_t row, bool useFilter) const
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{
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if (useFilter && isFiltered() && !isAllowed(row))
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throw InvalidAccessException("Row not allowed");
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if (isNull(col, row)) return Poco::Dynamic::Var();
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switch (columnType(col))
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{
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case MetaColumn::FDT_BOOL: return value<bool>(col, row, useFilter);
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case MetaColumn::FDT_INT8: return value<Int8>(col, row, useFilter);
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case MetaColumn::FDT_UINT8: return value<UInt8>(col, row, useFilter);
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case MetaColumn::FDT_INT16: return value<Int16>(col, row, useFilter);
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case MetaColumn::FDT_UINT16: return value<UInt16>(col, row, useFilter);
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case MetaColumn::FDT_INT32: return value<Int32>(col, row, useFilter);
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case MetaColumn::FDT_UINT32: return value<UInt32>(col, row, useFilter);
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case MetaColumn::FDT_INT64: return value<Int64>(col, row, useFilter);
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case MetaColumn::FDT_UINT64: return value<UInt64>(col, row, useFilter);
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case MetaColumn::FDT_FLOAT: return value<float>(col, row, useFilter);
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case MetaColumn::FDT_DOUBLE: return value<double>(col, row, useFilter);
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case MetaColumn::FDT_STRING: return value<std::string>(col, row, useFilter);
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case MetaColumn::FDT_BLOB: return value<BLOB>(col, row, useFilter);
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case MetaColumn::FDT_CLOB: return value<CLOB>(col, row, useFilter);
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case MetaColumn::FDT_DATE: return value<Date>(col, row, useFilter);
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case MetaColumn::FDT_TIME: return value<Time>(col, row, useFilter);
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case MetaColumn::FDT_TIMESTAMP: return value<DateTime>(col, row);
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default:
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throw UnknownTypeException("Data type not supported.");
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}
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}
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Poco::Dynamic::Var RecordSet::value(const std::string& name, std::size_t row, bool useFilter) const
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{
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if (useFilter && isFiltered() && !isAllowed(row))
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throw InvalidAccessException("Row not allowed");
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if (isNull(metaColumn(name).position(), row)) return Poco::Dynamic::Var();
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switch (columnType(name))
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{
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case MetaColumn::FDT_BOOL: return value<bool>(name, row, useFilter);
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case MetaColumn::FDT_INT8: return value<Int8>(name, row, useFilter);
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case MetaColumn::FDT_UINT8: return value<UInt8>(name, row, useFilter);
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case MetaColumn::FDT_INT16: return value<Int16>(name, row, useFilter);
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case MetaColumn::FDT_UINT16: return value<UInt16>(name, row, useFilter);
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case MetaColumn::FDT_INT32: return value<Int32>(name, row, useFilter);
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case MetaColumn::FDT_UINT32: return value<UInt32>(name, row, useFilter);
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case MetaColumn::FDT_INT64: return value<Int64>(name, row, useFilter);
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case MetaColumn::FDT_UINT64: return value<UInt64>(name, row, useFilter);
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case MetaColumn::FDT_FLOAT: return value<float>(name, row, useFilter);
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case MetaColumn::FDT_DOUBLE: return value<double>(name, row, useFilter);
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case MetaColumn::FDT_STRING: return value<std::string>(name, row, useFilter);
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case MetaColumn::FDT_BLOB: return value<BLOB>(name, row, useFilter);
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case MetaColumn::FDT_DATE: return value<Date>(name, row, useFilter);
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case MetaColumn::FDT_TIME: return value<Time>(name, row, useFilter);
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case MetaColumn::FDT_TIMESTAMP: return value<DateTime>(name, row, useFilter);
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default:
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throw UnknownTypeException("Data type not supported.");
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}
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}
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Row& RecordSet::row(std::size_t pos)
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{
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std::size_t rowCnt = rowCount();
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if (0 == rowCnt || pos > rowCnt - 1)
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throw RangeException("Invalid recordset row requested.");
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RowMap::const_iterator it = _rowMap.find(pos);
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Row* pRow = 0;
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std::size_t columns = columnCount();
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if (it == _rowMap.end())
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{
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if (_rowMap.size())
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{
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//reuse first row column names and sorting fields to save some memory
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pRow = new Row(_rowMap.begin()->second->names(),
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_rowMap.begin()->second->getSortMap(),
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getRowFormatter());
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for (std::size_t col = 0; col < columns; ++col)
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pRow->set(col, value(col, pos));
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}
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else
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{
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pRow = new Row;
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pRow->setFormatter(getRowFormatter());
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for (std::size_t col = 0; col < columns; ++col)
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pRow->append(metaColumn(static_cast<UInt32>(col)).name(), value(col, pos));
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}
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_rowMap.insert(RowMap::value_type(pos, pRow));
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}
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else
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{
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pRow = it->second;
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poco_check_ptr (pRow);
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}
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return *pRow;
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}
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std::size_t RecordSet::rowCount() const
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{
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poco_assert (extractions().size());
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std::size_t rc = subTotalRowCount();
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if (!isFiltered()) return rc;
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std::size_t counter = 0;
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for (int row = 0; row < rc; ++row)
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{
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if (isAllowed(row)) ++counter;
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}
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return counter;
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}
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bool RecordSet::isAllowed(std::size_t row) const
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{
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if (!isFiltered()) return true;
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return _pFilter->isAllowed(row);
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}
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bool RecordSet::moveFirst()
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{
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if (subTotalRowCount() > 0)
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{
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if (!isFiltered())
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{
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_currentRow = 0;
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return true;
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}
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std::size_t currentRow = _currentRow;
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currentRow = 0;
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while (!isAllowed(currentRow))
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{
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if (currentRow >= subTotalRowCount() - 1) return false;
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++currentRow;
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}
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_currentRow = currentRow;
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return true;
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}
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else return false;
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}
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bool RecordSet::moveNext()
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{
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std::size_t currentRow = _currentRow;
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do
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{
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if (currentRow >= subTotalRowCount() - 1) return false;
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++currentRow;
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} while (isFiltered() && !isAllowed(currentRow));
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_currentRow = currentRow;
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return true;
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}
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bool RecordSet::movePrevious()
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{
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std::size_t currentRow = _currentRow;
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do
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{
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if (currentRow <= 0) return false;
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--currentRow;
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} while (isFiltered() && !isAllowed(currentRow));
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_currentRow = currentRow;
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return true;
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}
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bool RecordSet::moveLast()
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{
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if (subTotalRowCount() > 0)
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{
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std::size_t currentRow = _currentRow;
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currentRow = subTotalRowCount() - 1;
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if (!isFiltered())
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{
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_currentRow = currentRow;
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return true;
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}
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while (!isAllowed(currentRow))
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{
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if (currentRow <= 0) return false;
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--currentRow;
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}
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_currentRow = currentRow;
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return true;
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}
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else return false;
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}
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void RecordSet::setRowFormatter(RowFormatter::Ptr pRowFormatter)
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{
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pRowFormatter->setTotalRowCount(static_cast<int>(getTotalRowCount()));
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Statement::setRowFormatter(pRowFormatter);
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RowMap::iterator it = _rowMap.begin();
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RowMap::iterator end = _rowMap.end();
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for (; it != end; ++it) it->second->setFormatter(getRowFormatter());
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}
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std::ostream& RecordSet::copyNames(std::ostream& os) const
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{
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std::string names = (*_pBegin)->namesToString();
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if (!names.empty()) os << names;
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return os;
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}
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std::ostream& RecordSet::copyValues(std::ostream& os, std::size_t offset, std::size_t length) const
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{
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RowIterator it = *_pBegin + offset;
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RowIterator end = (RowIterator::POSITION_END != length) ? it + length : *_pEnd;
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std::copy(it, end, std::ostream_iterator<Row>(os));
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return os;
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}
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void RecordSet::formatValues(std::size_t offset, std::size_t length) const
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{
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RowIterator it = *_pBegin + offset;
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RowIterator end = (RowIterator::POSITION_END != length) ? it + length : *_pEnd;
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std::string val;
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for (; it != end; ++it) it->formatValues();
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}
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std::ostream& RecordSet::copy(std::ostream& os, std::size_t offset, std::size_t length) const
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{
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RowFormatter& rf = const_cast<RowFormatter&>((*_pBegin)->getFormatter());
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rf.setTotalRowCount(static_cast<int>(getTotalRowCount()));
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if (RowFormatter::FORMAT_PROGRESSIVE == rf.getMode())
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{
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os << rf.prefix();
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copyNames(os);
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copyValues(os, offset, length);
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os << rf.postfix();
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}
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else
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{
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formatNames();
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formatValues(offset, length);
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os << rf.toString();
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}
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return os;
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}
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void RecordSet::filter(RowFilter* pFilter)
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{
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if (_pFilter) _pFilter->release();
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_pFilter = pFilter;
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if(_pFilter) _pFilter->duplicate();
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}
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bool RecordSet::isFiltered() const
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{
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return _pFilter && !_pFilter->isEmpty();
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}
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void RecordSet::setTotalRowCount(const std::string& sql)
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{
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session() << sql, into(_totalRowCount), now;
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}
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} } // namespace Poco::Data
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