/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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** 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
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
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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 "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);
    void detachFromResultSet();
    void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy);
private:
    bool cacheNext();
    QSqlCachedResultPrivate *d;
};

QT_END_NAMESPACE

#endif // QSQLCACHEDRESULT_P_H
