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357 lines (302 loc) · 8.86 KB
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//
// StatementImpl.cpp
//
// $Id: //poco/Main/Data/src/StatementImpl.cpp#20 $
//
// Library: Data
// Package: DataCore
// Module: StatementImpl
//
// 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/StatementImpl.h"
#include "Poco/Data/SessionImpl.h"
#include "Poco/Data/DataException.h"
#include "Poco/Data/AbstractBinder.h"
#include "Poco/Data/Extraction.h"
#include "Poco/Data/BLOB.h"
#include "Poco/Data/Date.h"
#include "Poco/Data/Time.h"
#include "Poco/SharedPtr.h"
#include "Poco/DateTime.h"
#include "Poco/Exception.h"
using Poco::icompare;
namespace Poco {
namespace Data {
const std::string StatementImpl::VECTOR = "vector";
const std::string StatementImpl::LIST = "list";
const std::string StatementImpl::DEQUE = "deque";
const std::string StatementImpl::UNKNOWN = "unknown";
StatementImpl::StatementImpl(SessionImpl& rSession):
_state(ST_INITIALIZED),
_extrLimit(upperLimit((Poco::UInt32) Limit::LIMIT_UNLIMITED, false)),
_lowerLimit(0),
_columnsExtracted(0),
_rSession(rSession),
_storage(STORAGE_UNKNOWN_IMPL),
_ostr(),
_bindings(),
_curDataSet(0),
_step(1u)
{
_extractors.resize(1);
}
StatementImpl::~StatementImpl()
{
}
Poco::UInt32 StatementImpl::execute()
{
resetExtraction();
Poco::UInt32 lim = 0;
if (_lowerLimit > _extrLimit.value())
throw LimitException("Illegal Statement state. Upper limit must not be smaller than the lower limit.");
if (_extrLimit.value() == Limit::LIMIT_UNLIMITED)
lim = executeWithoutLimit();
else
lim = executeWithLimit();
if (lim < _lowerLimit)
{
throw LimitException("Did not receive enough data.");
}
return lim;
}
Poco::UInt32 StatementImpl::executeWithLimit()
{
poco_assert (_state != ST_DONE);
compile();
Poco::UInt32 count = 0;
do
{
bind();
while (hasNext() && count < _extrLimit.value())
count += next();
} while (canBind());
if (!canBind() && (!hasNext() || _extrLimit.value() == 0))
_state = ST_DONE;
else if (hasNext() && _extrLimit.value() == count && _extrLimit.isHardLimit())
throw LimitException("HardLimit reached. We got more data than we asked for");
else
_state = ST_PAUSED;
return count;
}
Poco::UInt32 StatementImpl::executeWithoutLimit()
{
poco_assert (_state != ST_DONE);
compile();
Poco::UInt32 count = 0;
do
{
bind();
while (hasNext()) count += next();
} while (canBind());
_state = ST_DONE;
return count;
}
void StatementImpl::compile()
{
if (_state == ST_INITIALIZED)
{
compileImpl();
_state = ST_COMPILED;
if (!extractions().size() && !isStoredProcedure())
{
Poco::UInt32 cols = columnsReturned();
if (cols) makeExtractors(cols);
}
fixupExtraction();
fixupBinding();
}
else if (_state == ST_RESET)
{
resetBinding();
resetExtraction();
_state = ST_COMPILED;
}
}
void StatementImpl::bind()
{
if (_state == ST_COMPILED)
{
bindImpl();
_state = ST_BOUND;
}
else if (_state == ST_BOUND)
{
if (!hasNext())
{
if (canBind())
{
bindImpl();
}
else
_state = ST_DONE;
}
}
}
void StatementImpl::reset()
{
_state = ST_RESET;
compile();
}
void StatementImpl::setExtractionLimit(const Limit& extrLimit)
{
if (!extrLimit.isLowerLimit())
_extrLimit = extrLimit;
else
_lowerLimit = extrLimit.value();
}
void StatementImpl::fixupExtraction()
{
Poco::Data::AbstractExtractionVec::iterator it = extractions().begin();
Poco::Data::AbstractExtractionVec::iterator itEnd = extractions().end();
AbstractExtractor& ex = extractor();
_columnsExtracted = 0;
for (; it != itEnd; ++it)
{
(*it)->setExtractor(&ex);
(*it)->setLimit(_extrLimit.value()),
_columnsExtracted += (int)(*it)->numOfColumnsHandled();
}
}
void StatementImpl::fixupBinding()
{
// no need to call binder().reset(); here will be called before each bind anyway
AbstractBindingVec::iterator it = bindings().begin();
AbstractBindingVec::iterator itEnd = bindings().end();
AbstractBinder& bin = binder();
std::size_t numRows = 0;
if (it != itEnd)
numRows = (*it)->numOfRowsHandled();
for (; it != itEnd; ++it)
{
if (numRows != (*it)->numOfRowsHandled())
{
throw BindingException("Size mismatch in Bindings. All Bindings MUST have the same size");
}
(*it)->setBinder(&bin);
}
}
void StatementImpl::resetBinding()
{
AbstractBindingVec::iterator it = bindings().begin();
AbstractBindingVec::iterator itEnd = bindings().end();
for (; it != itEnd; ++it)
{
(*it)->reset();
}
}
void StatementImpl::resetExtraction()
{
Poco::Data::AbstractExtractionVec::iterator it = extractions().begin();
Poco::Data::AbstractExtractionVec::iterator itEnd = extractions().end();
for (; it != itEnd; ++it)
{
(*it)->reset();
}
}
void StatementImpl::setStorage(const std::string& storage)
{
if (0 == icompare(DEQUE, storage))
_storage = STORAGE_DEQUE_IMPL;
else if (0 == icompare(VECTOR, storage))
_storage = STORAGE_VECTOR_IMPL;
else if (0 == icompare(LIST, storage))
_storage = STORAGE_LIST_IMPL;
else if (0 == icompare(UNKNOWN, storage))
_storage = STORAGE_UNKNOWN_IMPL;
else
throw NotFoundException();
}
void StatementImpl::makeExtractors(Poco::UInt32 count)
{
for (int i = 0; i < count; ++i)
{
const MetaColumn& mc = metaColumn(i);
switch (mc.type())
{
case MetaColumn::FDT_BOOL:
addInternalExtract<bool>(mc); break;
case MetaColumn::FDT_INT8:
addInternalExtract<Int8>(mc); break;
case MetaColumn::FDT_UINT8:
addInternalExtract<UInt8>(mc); break;
case MetaColumn::FDT_INT16:
addInternalExtract<Int16>(mc); break;
case MetaColumn::FDT_UINT16:
addInternalExtract<UInt16>(mc); break;
case MetaColumn::FDT_INT32:
addInternalExtract<Int32>(mc); break;
case MetaColumn::FDT_UINT32:
addInternalExtract<UInt32>(mc); break;
case MetaColumn::FDT_INT64:
addInternalExtract<Int64>(mc); break;
case MetaColumn::FDT_UINT64:
addInternalExtract<UInt64>(mc); break;
case MetaColumn::FDT_FLOAT:
addInternalExtract<float>(mc); break;
case MetaColumn::FDT_DOUBLE:
addInternalExtract<double>(mc); break;
case MetaColumn::FDT_STRING:
addInternalExtract<std::string>(mc); break;
case MetaColumn::FDT_BLOB:
addInternalExtract<BLOB>(mc); break;
case MetaColumn::FDT_DATE:
addInternalExtract<Date>(mc); break;
case MetaColumn::FDT_TIME:
addInternalExtract<Time>(mc); break;
case MetaColumn::FDT_TIMESTAMP:
addInternalExtract<DateTime>(mc); break;
default:
throw Poco::InvalidArgumentException("Data type not supported.");
}
}
}
const MetaColumn& StatementImpl::metaColumn(const std::string& name) const
{
Poco::UInt32 cols = columnsReturned();
for (Poco::UInt32 i = 0; i < cols; ++i)
{
const MetaColumn& column = metaColumn(i);
if (0 == icompare(column.name(), name)) return column;
}
throw NotFoundException(format("Invalid column name: %s", name));
}
Poco::UInt32 StatementImpl::activateNextDataSet()
{
if (_curDataSet + 1 < dataSetCount())
return ++_curDataSet;
else
throw InvalidAccessException("End of data sets reached.");
}
void StatementImpl::addExtract(AbstractExtraction* pExtraction)
{
poco_check_ptr (pExtraction);
Poco::UInt32 pos = pExtraction->position();
if (pos >= _extractors.size())
_extractors.resize(pos + 1);
_extractors[pos].push_back(pExtraction);
}
} } // namespace Poco::Data