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#ifndef INTREPID_ADAPTIVESPARSEGRIDINTERFACE_HPP
#define INTREPID_ADAPTIVESPARSEGRIDINTERFACE_HPP

#include "Intrepid_CubatureTensorSorted.hpp"

namespace Intrepid {

template<class Scalar, class UserVector>
class AdaptiveSparseGridInterface {
protected:  
  int    dimension_;
 
  int    maxLevel_;

  Scalar initialDiff_;

  bool   isNormalized_;

  std::vector<EIntrepidBurkardt> rule1D_;
  
  std::vector<EIntrepidGrowth>   growth1D_;

public:  
  virtual ~AdaptiveSparseGridInterface() {};

  AdaptiveSparseGridInterface(
                     int dimension,
                     std::vector<EIntrepidBurkardt> rule1D,
                     std::vector<EIntrepidGrowth> growth1D,
                     int maxLevel,
                     bool isNormalized);

  virtual void eval_integrand(
                     UserVector & output, 
                     std::vector<Scalar> & input) = 0;

  virtual void eval_cubature(
                     UserVector & output, 
                     CubatureTensorSorted<Scalar> & cubRule);

  virtual Scalar error_indicator(
                     UserVector & input) = 0;

  virtual bool max_level(
                     std::vector<int> index);

  void init(UserVector & output);

  void getRule(std::vector<EIntrepidBurkardt> & rule1D);

  void getGrowth(std::vector<EIntrepidGrowth> & growth1D);

  int getDimension();
 
  Scalar getInitialDiff();

  bool isNormalized();
};

} // End Intrepid namespace

// include templated definitions
#include <Intrepid_AdaptiveSparseGridInterfaceDef.hpp>

#endif