Thyra_DefaultBlockedTriangularLinearOpWithSolve_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_DEFAULT_BLOCKED_TRIANGULAR_LINEAR_OP_WITH_SOLVE_DECL_HPP
#define THYRA_DEFAULT_BLOCKED_TRIANGULAR_LINEAR_OP_WITH_SOLVE_DECL_HPP


#include "Thyra_PhysicallyBlockedLinearOpWithSolveBase.hpp"
#include "Thyra_PhysicallyBlockedLinearOpBase.hpp"
#include "Thyra_ProductVectorSpaceBase.hpp"
#include "Teuchos_ConstNonconstObjectContainer.hpp"
#include "Teuchos_Array.hpp"


namespace Thyra {


template<class Scalar>
class DefaultBlockedTriangularLinearOpWithSolve
  : virtual public PhysicallyBlockedLinearOpWithSolveBase<Scalar>
{
public:


  DefaultBlockedTriangularLinearOpWithSolve();

  void setNonconstBlocks( const RCP<PhysicallyBlockedLinearOpBase<Scalar> > &blocks );

  void setBlocks( const RCP<const PhysicallyBlockedLinearOpBase<Scalar> > &blocks );

  RCP<PhysicallyBlockedLinearOpBase<Scalar> > getNonconstBlocks();

  RCP<const PhysicallyBlockedLinearOpBase<Scalar> > getBlocks();


  
  bool acceptsLOWSBlock(const int i, const int j) const;
  void setNonconstLOWSBlock(
    const int i, const int j,
    const RCP<LinearOpWithSolveBase<Scalar> > &block
    );
  void setLOWSBlock(
    const int i, const int j,
    const RCP<const LinearOpWithSolveBase<Scalar> > &block
    );



  void beginBlockFill();
  void beginBlockFill(
    const int numRowBlocks, const int numColBlocks
    );
  void beginBlockFill(
    const RCP<const ProductVectorSpaceBase<Scalar> > &productRange,
    const RCP<const ProductVectorSpaceBase<Scalar> > &productDomain
    );
  bool blockFillIsActive() const;
  bool acceptsBlock(const int i, const int j) const;
  void setNonconstBlock(
    const int i, const int j,
    const RCP<LinearOpBase<Scalar> > &block
    );
  void setBlock(
    const int i, const int j,
    const RCP<const LinearOpBase<Scalar> > &block
    );
  void endBlockFill();
  void uninitialize();



  RCP<LinearOpWithSolveBase<Scalar> >
  getNonconstLOWSBlock(const int i, const int j); 
  RCP<const LinearOpWithSolveBase<Scalar> >
  getLOWSBlock(const int i, const int j) const; 



  RCP<const ProductVectorSpaceBase<Scalar> >
  productRange() const;
  RCP<const ProductVectorSpaceBase<Scalar> >
  productDomain() const;
  bool blockExists(const int i, const int j) const; 
  bool blockIsConst(const int i, const int j) const; 
  RCP<LinearOpBase<Scalar> >
  getNonconstBlock(const int i, const int j); 
  RCP<const LinearOpBase<Scalar> >
  getBlock(const int i, const int j) const; 



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


                                                
  std::string description() const;

  void describe(
    Teuchos::FancyOStream &out,
    const Teuchos::EVerbosityLevel verbLevel
    ) const;


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

  bool solveSupportsImpl(EOpTransp M_trans) const;
  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 types

  typedef Teuchos::ConstNonconstObjectContainer<LinearOpWithSolveBase<Scalar> >
  CNCLOWS;

  typedef Teuchos::ConstNonconstObjectContainer<PhysicallyBlockedLinearOpBase<Scalar> >
  CNCPBLOB;

  // /////////////////////////
  // Private data members
  
  bool blockFillIsActive_;

  RCP<const ProductVectorSpaceBase<Scalar> > productRange_;
  RCP<const ProductVectorSpaceBase<Scalar> > productDomain_;
  int numDiagBlocks_;
  
  Array<CNCLOWS> diagonalBlocks_;

  // All blocks (including LOB form of diagonals)
  CNCPBLOB blocks_;

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

  void assertBlockFillIsActive(bool) const;

  void assertBlockRowCol(const int i, const int j) const;

  template<class LinearOpWithSolveType>
  void setLOWSBlockImpl( const int i, const int j,
    const RCP<LinearOpWithSolveType> &block );

  void assertAndSetBlockStructure(const PhysicallyBlockedLinearOpBase<Scalar>& blocks);
  
  // Not defined and not to be called

  DefaultBlockedTriangularLinearOpWithSolve(
    const DefaultBlockedTriangularLinearOpWithSolve&);

  DefaultBlockedTriangularLinearOpWithSolve&
  operator=(const DefaultBlockedTriangularLinearOpWithSolve&);
  
};


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


} // namespace Thyra


#endif  // THYRA_DEFAULT_BLOCKED_TRIANGULAR_LINEAR_OP_WITH_SOLVE_DECL_HPP