/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

//  $Id: windowframe.h 3932 2013-06-25 16:08:10Z xlou $


#ifndef UTILS_WINDOWFRAME_H
#define UTILS_WINDOWFRAME_H

#include <utility>              // std::pair, std::make_pair
#include <boost/shared_ptr.hpp>
#include "framebound.h"

namespace windowfunction
{

const int64_t WF__FRAME_ROWS  = 0;
const int64_t WF__FRAME_RANGE = 1;


/** @brief class WindowFrame
 *
 */
class WindowFrame
{
public:
    /** @brief WindowFrame constructor
     */
    WindowFrame(int64_t t, boost::shared_ptr<FrameBound>& u, boost::shared_ptr<FrameBound>& l) :
        fUnit(t), fUpper(u), fLower(l)
    {}

    /** @brief WindowFrame copy constructor
     */
    WindowFrame(const WindowFrame& rhs) :
        fUnit(rhs.fUnit),
        fUpper(rhs.fUpper->clone()),
        fLower(rhs.fLower->clone())
    {}

    /** @brief WindowFrame destructor
     */
    virtual ~WindowFrame() {};

    /** @brief clone
     */
    virtual WindowFrame* clone()
    {
        return new WindowFrame(*this);
    };

    /** @brief virtual void getWindow
     */
    std::pair<uint64_t, uint64_t> getWindow(int64_t, int64_t, int64_t);

    const std::string toString() const;

    /** @brief set methods
     */
    void setRowMetaData(const rowgroup::RowGroup& g, const rowgroup::Row& r)
    {
        fUpper->setRowMetaData(g, r);
        fLower->setRowMetaData(g, r);
    }
    void setRowData(boost::shared_ptr<std::vector<joblist::RowPosition> >& d)
    {
        fUpper->setRowData(d);
        fLower->setRowData(d);
    }
    void setCallback(joblist::WindowFunctionStep* s)
    {
        fUpper->setCallback(s);
        fLower->setCallback(s);
    }

    int64_t unit() const
    {
        return fUnit;
    }
    void unit(int64_t t)
    {
        fUnit = t;
    }
    const boost::shared_ptr<FrameBound>& upper() const
    {
        return fUpper;
    }
    void upper(const boost::shared_ptr<FrameBound>& u)
    {
        fUpper = u;
    }
    const boost::shared_ptr<FrameBound>& lower() const
    {
        return fLower;
    }
    void lower(const boost::shared_ptr<FrameBound>& l)
    {
        fLower = l;
    }

protected:

    // type
    int64_t                                  fUnit;

    // data
    boost::shared_ptr<FrameBound>            fUpper;
    boost::shared_ptr<FrameBound>            fLower;
};


} // namespace

#endif  // UTILS_WINDOWFRAME_H

// vim:ts=4 sw=4: