/**
 * @file   has_tempgrids.hpp
 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
 * @date   Tue Apr  5 21:00:56 2011
 *
 * @brief  Provides an arbitrary number of temporary grids,
 *         accessible by an integer key.
 *
 */

#ifndef HAS_TEMPGRIDS_HPP_
#define HAS_TEMPGRIDS_HPP_

#include <map>

#include "grid/tempgrid.hpp"
#include "mg.hpp"

namespace VMG
{

class HasTempGrids
{
public:
  virtual ~HasTempGrids()
  {
    for (std::map<int, TempGrid*>::iterator iter = grids_1.begin(); iter != grids_1.end(); ++iter)
      delete iter->second;

    for (std::map<const Grid*, TempGrid*>::iterator iter = grids_2.begin(); iter != grids_2.end(); ++iter)
      delete iter->second;
  }

protected:
  TempGrid* GetTempGrid(int key)
  {
    std::map<int, TempGrid*>::iterator iter = grids_1.find(key);

    if (iter == grids_1.end())
      iter = grids_1.insert(std::pair<int, TempGrid*>(key, new TempGrid())).first;

    return iter->second;
  }

  TempGrid* GetTempGrid(const Grid* key)
  {
    std::map<const Grid*, TempGrid*>::iterator iter = grids_2.find(key);

    if (iter == grids_2.end())
      iter = grids_2.insert(std::pair<const Grid*, TempGrid*>(key, new TempGrid())).first;

    return iter->second;
  }

private:
  std::map<int, TempGrid*> grids_1;
  std::map<const Grid*, TempGrid*> grids_2;
};

}

#endif /* HAS_TEMPGRIDS_HPP_ */