/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtSql module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QSQLCACHEDRESULT_P_H

#define QSQLCACHEDRESULT_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include "QtSql/qsqlresult.h"

QT_BEGIN_NAMESPACE

class QVariant;

template <typename T> class QVector;

class QSqlCachedResultPrivate;

class Q_SQL_EXPORT QSqlCachedResult: public QSqlResult

{

public:

    virtual ~QSqlCachedResult();

    typedef QVector<QVariant> ValueCache;

protected:

    QSqlCachedResult(const QSqlDriver * db);

    void init(int colCount);

    void cleanup();

    void clearValues();

    virtual bool gotoNext(ValueCache &values, int index) = 0;

    QVariant data(int i);

    bool isNull(int i);

    bool fetch(int i);

    bool fetchNext();

    bool fetchPrevious();

    bool fetchFirst();

    bool fetchLast();

    int colCount() const;

    ValueCache &cache();

    void virtual_hook(int id, void *data);

private:

    bool cacheNext();

    QSqlCachedResultPrivate *d;

};

QT_END_NAMESPACE

#endif // QSQLCACHEDRESULT_P_H