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/* This file is part of the KDE project
Copyright (C) 2003,2006 Jaroslaw Staniek <js@iidea.pl>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "roweditbuffer.h"
#include "utils.h"
#include <kdebug.h>
using namespace KexiDB;
RowEditBuffer::RowEditBuffer(bool dbAwareBuffer)
: m_simpleBuffer(dbAwareBuffer ? 0 : new SimpleMap())
, m_simpleBufferIt(dbAwareBuffer ? 0 : new SimpleMap::ConstIterator())
, m_dbBuffer(dbAwareBuffer ? new DBMap() : 0)
, m_dbBufferIt(dbAwareBuffer ? new DBMap::Iterator() : 0)
, m_defaultValuesDbBuffer(dbAwareBuffer ? new QMap<QueryColumnInfo*,bool>() : 0)
, m_defaultValuesDbBufferIt(dbAwareBuffer ? new QMap<QueryColumnInfo*,bool>::ConstIterator() : 0)
{
}
RowEditBuffer::~RowEditBuffer()
{
delete m_simpleBuffer;
delete m_simpleBufferIt;
delete m_dbBuffer;
delete m_defaultValuesDbBuffer;
delete m_dbBufferIt;
}
const QVariant* RowEditBuffer::at( QueryColumnInfo& ci, bool useDefaultValueIfPossible ) const
{
if (!m_dbBuffer) {
KexiDBWarn << "RowEditBuffer::at(QueryColumnInfo&): not db-aware buffer!" << endl;
return 0;
}
*m_dbBufferIt = m_dbBuffer->find( &ci );
QVariant* result = 0;
if (*m_dbBufferIt!=m_dbBuffer->end())
result = &(*m_dbBufferIt).data();
if ( useDefaultValueIfPossible
&& (!result || result->isNull())
&& ci.field && !ci.field->defaultValue().isNull() && KexiDB::isDefaultValueAllowed(ci.field)
&& !hasDefaultValueAt(ci) )
{
//no buffered or stored value: try to get a default value declared in a field, so user can modify it
if (!result)
m_dbBuffer->insert(&ci, ci.field->defaultValue() );
result = &(*m_dbBuffer)[ &ci ];
m_defaultValuesDbBuffer->insert(&ci, true);
}
return (const QVariant*)result;
}
const QVariant* RowEditBuffer::at( Field& f ) const
{
if (!m_simpleBuffer) {
KexiDBWarn << "RowEditBuffer::at(Field&): this is db-aware buffer!" << endl;
return 0;
}
*m_simpleBufferIt = m_simpleBuffer->find( f.name() );
if (*m_simpleBufferIt==m_simpleBuffer->constEnd())
return 0;
return &(*m_simpleBufferIt).data();
}
const QVariant* RowEditBuffer::at( const QString& fname ) const
{
if (!m_simpleBuffer) {
KexiDBWarn << "RowEditBuffer::at(Field&): this is db-aware buffer!" << endl;
return 0;
}
*m_simpleBufferIt = m_simpleBuffer->find( fname );
if (*m_simpleBufferIt==m_simpleBuffer->constEnd())
return 0;
return &(*m_simpleBufferIt).data();
}
void RowEditBuffer::clear() {
if (m_dbBuffer) {
m_dbBuffer->clear();
m_defaultValuesDbBuffer->clear();
}
if (m_simpleBuffer)
m_simpleBuffer->clear();
}
bool RowEditBuffer::isEmpty() const
{
if (m_dbBuffer)
return m_dbBuffer->isEmpty();
if (m_simpleBuffer)
return m_simpleBuffer->isEmpty();
return true;
}
void RowEditBuffer::debug()
{
if (isDBAware()) {
KexiDBDbg << "RowEditBuffer type=DB-AWARE, " << m_dbBuffer->count() <<" items"<< endl;
for (DBMap::ConstIterator it = m_dbBuffer->constBegin(); it!=m_dbBuffer->constEnd(); ++it) {
KexiDBDbg << "* field name=" <<it.key()->field->name()<<" val="
<< (it.data().isNull() ? QString("<NULL>") : it.data().toString())
<< (hasDefaultValueAt(*it.key()) ? " DEFAULT" : "") <<endl;
}
return;
}
KexiDBDbg << "RowEditBuffer type=SIMPLE, " << m_simpleBuffer->count() <<" items"<< endl;
for (SimpleMap::ConstIterator it = m_simpleBuffer->constBegin(); it!=m_simpleBuffer->constEnd(); ++it) {
KexiDBDbg << "* field name=" <<it.key()<<" val="
<< (it.data().isNull() ? QString("<NULL>") : it.data().toString()) <<endl;
}
}
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