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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2011, Brian Aker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Patrick Galbraith nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <drizzled/sql/exception.h>
#include <drizzled/sql/result_set.h>
#include <iostream>
namespace drizzled {
namespace sql {
static Exception exception_unknown_column("Unknown Column", "S0022", ER_BAD_FIELD_ERROR);
static Exception exception_no_more_results("No additional rows founds", "S0022", ER_BAD_FIELD_ERROR);
ResultSet::~ResultSet()
{
}
const std::string ResultSet::getString(size_t column_number) const
{
if (not isMore(column_number))
return "";
return (*_current_row)[column_number].value();
}
bool ResultSet::isNull(size_t column_number) const
{
return (*_current_row)[column_number].isNull();
}
void ResultSet::pushException(const Exception &arg) const
{
if (_exceptions.empty())
{
_exceptions.push(arg);
return;
}
_exceptions.front().setNextException(arg);
}
bool ResultSet::isMore() const
{
if (_current_row == _results.end())
{
pushException(exception_no_more_results);
return false;
}
return true;
}
bool ResultSet::isMore(size_t column_number) const
{
if (column_number >= _meta_data.getColumnCount())
{
pushException(exception_unknown_column);
return false;
}
return isMore();
}
bool ResultSet::error() const
{
return not _exceptions.empty();
}
sql::Exception ResultSet::getException() const
{
return _exceptions.empty() ? sql::Exception() : _exceptions.front();
}
const ResultSetMetaData &ResultSet::getMetaData() const
{
return _meta_data;
}
void ResultSet::createRow()
{
assert(_meta_data.getColumnCount());
_results.resize(_results.size() +1);
_results.back().resize(_meta_data.getColumnCount());
}
void ResultSet::setColumn(size_t column_number, const std::string &arg)
{
assert(column_number < _meta_data.getColumnCount());
assert(_results.back().at(column_number).isNull() == false); // ie the default value
assert(_results.back().at(column_number).value().empty() == true); // ie no value has been set yet
_results.back().at(column_number).set_value(arg);
}
void ResultSet::setColumnNull(size_t column_number)
{
assert(column_number < _meta_data.getColumnCount());
assert(_results.back().at(column_number).isNull() == false); // ie the default value
assert(_results.back().at(column_number).value().empty() == true); // ie no value has been set yet
_results.back().at(column_number).set_null();
}
bool ResultSet::next() const
{
if (not _has_next_been_called)
{
_current_row= _results.begin();
_has_next_been_called= true;
}
else
{
_current_row++;
}
if (_current_row == _results.end())
return false;
return true;
}
std::ostream& operator<<(std::ostream& output, const ResultSet &result_set)
{
while (result_set.next())
{
for (size_t x= 0; x < result_set.getMetaData().getColumnCount(); x++)
{
if (result_set.isNull(x))
{
output << "<null>" << '\t';
}
else
{
output << result_set.getString(x) << '\t';
}
}
output << std::endl;
}
return output;
}
} // namespace sql
} // namespace drizzled
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