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qsqlnulldriver_p.h

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef QSQLNULLDRIVER_P_H
#define QSQLNULLDRIVER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  This header file may
// change from version to version without notice, or even be
// removed.
//
// We mean it.
//

#include "QtCore/qvariant.h"
#include "QtSql/qsqldriver.h"
#include "QtSql/qsqlerror.h"
#include "QtSql/qsqlresult.h"

class QSqlNullResult : public QSqlResult
{
public:
    inline explicit QSqlNullResult(const QSqlDriver* d): QSqlResult(d)
    { QSqlResult::setLastError(
            QSqlError(QLatin1String("Driver not loaded"), QLatin1String("Driver not loaded"))); }
protected:
    inline QVariant data(int) { return QVariant(); }
    inline bool reset (const QString&) { return false; }
    inline bool fetch(int) { return false; }
    inline bool fetchFirst() { return false; }
    inline bool fetchLast() { return false; }
    inline bool isNull(int) { return false; }
    inline int size()  { return -1; }
    inline int numRowsAffected() { return 0; }

    inline void setAt(int) {}
    inline void setActive(bool) {}
    inline void setLastError(const QSqlError&) {}
    inline void setQuery(const QString&) {}
    inline void setSelect(bool) {}
    inline void setForwardOnly(bool) {}

    inline bool exec() { return false; }
    inline bool prepare(const QString&) { return false; }
    inline bool savePrepare(const QString&) { return false; }
    inline void bindValue(int, const QVariant&, QSql::ParamType) {}
    inline void bindValue(const QString&, const QVariant&, QSql::ParamType) {}
};

class QSqlNullDriver : public QSqlDriver
{
public:
    inline QSqlNullDriver(): QSqlDriver()
    { QSqlDriver::setLastError(
            QSqlError(QLatin1String("Driver not loaded"), QLatin1String("Driver not loaded"))); }
    inline bool hasFeature(DriverFeature) const { return false; }
    inline bool open(const QString &, const QString & , const QString & ,
              const QString &, int, const QString&)
    { return false; }
    inline void close() {}
    inline QSqlResult *createResult() const { return new QSqlNullResult(this); }

protected:
    inline void setOpen(bool) {}
    inline void setOpenError(bool) {}
    inline void setLastError(const QSqlError&) {}
};

#endif // QSQLNULLDRIVER_P_H

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