queryschemaparameter.cpp

/* This file is part of the KDE project
   Copyright (C) 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 "queryschemaparameter.h"
#include "driver.h"
 
#include <kdebug.h>
#include <tqguardedptr.h>
 
using namespace KexiDB;
 
QuerySchemaParameter::QuerySchemaParameter()
 : type(Field::InvalidType)
{
}
 
QuerySchemaParameter::~QuerySchemaParameter()
{
}
 
TQString QuerySchemaParameter::debugString() const
{
    return TQString("msg=\"%1\" type=\"%2\"").arg(Field::typeName(type)).arg(message);
}
 
void KexiDB::debug(const QuerySchemaParameterList& list)
{
    KexiDBDbg << TQString("Query parameters (%1):").arg(list.count()) << endl;
    foreach(QuerySchemaParameterListConstIterator, it, list)
        KexiDBDbg << " - " << (*it).debugString() << endl;
}
 
//================================================
 
class QuerySchemaParameterValueListIterator::Private
{
    public:
        Private(const Driver& aDriver, const TQValueList<TQVariant>& aParams)
         : driver(&aDriver)
         , params(aParams)
        {
            //move to last item, as the order is reversed due to parser's internals
            paramsIt = params.fromLast(); //constBegin();
            paramsItPosition = params.count();
        }
        TQGuardedPtr<const Driver> driver;
        const TQValueList<TQVariant> params;
        TQValueList<TQVariant>::ConstIterator paramsIt;
        uint paramsItPosition;
};
 
QuerySchemaParameterValueListIterator::QuerySchemaParameterValueListIterator(
    const Driver& driver, const TQValueList<TQVariant>& params)
 : d( new Private(driver, params) )
{
}
 
QuerySchemaParameterValueListIterator::~QuerySchemaParameterValueListIterator()
{
    delete d;
}
 
TQVariant QuerySchemaParameterValueListIterator::getPreviousValue()
{
    if (d->paramsItPosition == 0) { //d->params.constEnd()) {
        KexiDBWarn << "QuerySchemaParameterValues::getPreviousValue() no prev value" << endl;
        return TQVariant();
    }
    TQVariant res( *d->paramsIt );
    --d->paramsItPosition;
    --d->paramsIt;
//  ++d->paramsIt;
    return res;
}
 
TQString QuerySchemaParameterValueListIterator::getPreviousValueAsString(Field::Type type)
{
    if (d->paramsItPosition == 0) { //d->params.constEnd()) {
        KexiDBWarn << "QuerySchemaParameterValues::getPreviousValueAsString() no prev value" << endl;
        return d->driver->valueToSQL(type, TQVariant()); //"NULL"
    }
    TQString res( d->driver->valueToSQL(type, *d->paramsIt) );
    --d->paramsItPosition;
    --d->paramsIt;
//  ++d->paramsIt;
    return res;
}