Thyra_ScalarProdBase_decl.hpp

// @HEADER
// *****************************************************************************
//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//
// Copyright 2004 NTESS and the Thyra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef THYRA_SCALAR_PROD_BASE_DECL_HPP
#define THYRA_SCALAR_PROD_BASE_DECL_HPP

#include "Thyra_OperatorVectorTypes.hpp"
#include "Teuchos_Describable.hpp"


namespace Thyra {


template<class Scalar>
class ScalarProdBase : virtual public Teuchos::Describable {
public:
  

  bool isEuclidean() const
    { return isEuclideanImpl(); }

  Scalar scalarProd(
    const VectorBase<Scalar>& x, const VectorBase<Scalar>& y
    ) const
    { return scalarProdImpl(x, y); }

  void scalarProds(
    const MultiVectorBase<Scalar>& X, const MultiVectorBase<Scalar>& Y,
    const ArrayView<Scalar> &scalarProds_out
    ) const
    { scalarProdsImpl(X, Y, scalarProds_out); }

  RCP<const LinearOpBase<Scalar> > getLinearOp() const
    { return getLinearOpImpl(); }


protected:


  virtual bool isEuclideanImpl() const = 0;
  
  virtual Scalar scalarProdImpl(
    const VectorBase<Scalar>& x, const VectorBase<Scalar>& y ) const;

  virtual void scalarProdsImpl(
    const MultiVectorBase<Scalar>& X, const MultiVectorBase<Scalar>& Y,
    const ArrayView<Scalar> &scalarProds_out
    ) const = 0;

  virtual RCP<const LinearOpBase<Scalar> > getLinearOpImpl() const
    {
      return Teuchos::null;
    }


};


} // end namespace Thyra


#endif  // THYRA_SCALAR_PROD_BASE_DECL_HPP