qsqlcachedresult.h

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** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
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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 QValueVector;

class QSqlCachedResultPrivate;

class QM_EXPORT_SQL QSqlCachedResult: public QSqlResult
{
public:
    virtual ~QSqlCachedResult();

    typedef QValueVector<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