Thyra_DelayedLinearOpWithSolve_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_DELAYED_LINEAR_OP_WITH_SOLVE_DECL_HPP
#define THYRA_DELAYED_LINEAR_OP_WITH_SOLVE_DECL_HPP


#include "Thyra_LinearOpWithSolveBase.hpp"
#include "Thyra_LinearOpSourceBase.hpp"


namespace Thyra {


template <class Scalar>
class DelayedLinearOpWithSolve : virtual public LinearOpWithSolveBase<Scalar>
{
public:


  DelayedLinearOpWithSolve();

  void initialize(
    const RCP<const LinearOpSourceBase<Scalar> > &fwdOpSrc,
    const RCP<const PreconditionerBase<Scalar> > &prec,
    const RCP<const LinearOpSourceBase<Scalar> > &approxFwdOpSrc,
    const ESupportSolveUse supportSolveUse,
    const RCP<LinearOpWithSolveFactoryBase<Scalar> > &lowsf
    );

  RCP<const LinearOpSourceBase<Scalar> > getFwdOpSrc() const;

  RCP<const PreconditionerBase<Scalar> > getPrec() const;
 
  RCP<const LinearOpSourceBase<Scalar> > getApproxFwdOpSrc() const;

  ESupportSolveUse getSupportSolveUse() const;



  std::string description() const;



  RCP< const VectorSpaceBase<Scalar> > range() const;
  RCP< const VectorSpaceBase<Scalar> > domain() const;
  RCP<const LinearOpBase<Scalar> > clone() const;


protected:

  void informUpdatedVerbosityState() const;

  virtual bool opSupportedImpl(EOpTransp M_trans) const;
  virtual void applyImpl(
    const EOpTransp M_trans,
    const MultiVectorBase<Scalar> &X,
    const Ptr<MultiVectorBase<Scalar> > &Y,
    const Scalar alpha,
    const Scalar beta
    ) const;

  virtual bool solveSupportsImpl(EOpTransp M_trans) const;
  virtual bool solveSupportsSolveMeasureTypeImpl(
    EOpTransp M_trans, const SolveMeasureType& solveMeasureType
    ) const;
  SolveStatus<Scalar> solveImpl(
    const EOpTransp transp,
    const MultiVectorBase<Scalar> &B,
    const Ptr<MultiVectorBase<Scalar> > &X,
    const Ptr<const SolveCriteria<Scalar> > solveCriteria
    ) const;

private:

  // //////////////////////
  // Private data members

  RCP<const LinearOpSourceBase<Scalar> > fwdOpSrc_;
  RCP<const PreconditionerBase<Scalar> > prec_;
  RCP<const LinearOpSourceBase<Scalar> > approxFwdOpSrc_;
  ESupportSolveUse supportSolveUse_;
  RCP<LinearOpWithSolveFactoryBase<Scalar> > lowsf_;

  RCP<const LinearOpBase<Scalar> > fwdOp_;

  mutable bool lows_is_valid_;
  mutable RCP<LinearOpWithSolveBase<Scalar> > lows_;

  // ///////////////////////////
  // Private member functions

  void updateSolver() const;

};


template <class Scalar>
RCP<DelayedLinearOpWithSolve<Scalar> > delayedLinearOpWithSolve()
{
  return Teuchos::rcp(new DelayedLinearOpWithSolve<Scalar>());
}


template <class Scalar>
RCP<DelayedLinearOpWithSolve<Scalar> >
delayedLinearOpWithSolve(
  const RCP<const LinearOpSourceBase<Scalar> > &fwdOpSrc,
  const RCP<LinearOpWithSolveFactoryBase<Scalar> > &lowsf
  )
{
  using Teuchos::null;
  const RCP<DelayedLinearOpWithSolve<Scalar> > dlows =
    delayedLinearOpWithSolve<Scalar>();
  dlows->initialize(fwdOpSrc, null, null, SUPPORT_SOLVE_UNSPECIFIED, lowsf);
  return dlows;
}


} // namespace Thyra


#endif // THYRA_DELAYED_LINEAR_OP_WITH_SOLVE_DECL_HPP