/**************************************************************************
* Extensible SQLite driver for Qt4/Qt5
* Copyright (C) 2011-2012 Michał Męciński
* Copyright (C) 2011-2020 QuiteRSS Team <quiterssteam@gmail.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library.  If not, see <https://www.gnu.org/licenses/>.
*
* This library is based on the QtSql module of the Qt Toolkit
* Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
**************************************************************************/

#ifndef SQLCACHEDRESULT_H
#define SQLCACHEDRESULT_H

#include <QtSql/qsqlresult.h>

class QVariant;
template <typename T> class QVector;

class SqlCachedResultPrivate;

class SqlCachedResult: public QSqlResult
{
public:
  virtual ~SqlCachedResult();

  typedef QVector<QVariant> ValueCache;

protected:
  SqlCachedResult(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();

#ifdef HAVE_QT5
  void detachFromResultSet();
  void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy);
#endif
  void virtual_hook(int id, void *data);

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

#endif
