/****************************************************************************
**
** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
**
** This file is part of the sql module of the Qt Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
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**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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****************************************************************************/

#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 <qsqlresult.h>

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();

    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();

private:
    bool cacheNext();
    QSqlCachedResultPrivate *d;
};

#endif // QSQLCACHEDRESULT_P_H
