Thyra_DefaultBlockedLinearOpDecl.hpp

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//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//                 Copyright (2004) Sandia Corporation
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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#ifndef THYRA_DEFAULT_BLOCKED_LINEAR_OP_DECL_HPP
#define THYRA_DEFAULT_BLOCKED_LINEAR_OP_DECL_HPP

#include "Thyra_PhysicallyBlockedLinearOpBase.hpp"
#include "Thyra_SingleScalarLinearOpBase.hpp"
#include "Thyra_ProductVectorSpaceBase.hpp"
#include "Teuchos_ConstNonconstObjectContainer.hpp"
#include "Teuchos_Array.hpp"
#include "Teuchos_Handleable.hpp"
#include "Teuchos_arrayArg.hpp"

namespace Thyra {

template<class Scalar>
class DefaultBlockedLinearOp
  : virtual public PhysicallyBlockedLinearOpBase<Scalar>  // Public interface
  , virtual protected SingleScalarLinearOpBase<Scalar>    // Implementation detail
  , virtual public Teuchos::Handleable<LinearOpBase<Scalar, Scalar> >
{
public:
  /* */
  TEUCHOS_GET_RCP(LinearOpBase<Scalar>);

  using SingleScalarLinearOpBase<Scalar>::apply;


  DefaultBlockedLinearOp();



  void beginBlockFill();
  void beginBlockFill(
    const int numRowBlocks, const int numColBlocks
    );
  void beginBlockFill(
    const Teuchos::RCP<const ProductVectorSpaceBase<Scalar> >  &productRange
    ,const Teuchos::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 Teuchos::RCP<LinearOpBase<Scalar> > &block
    );
  void setBlock(
    const int i, const int j
    ,const Teuchos::RCP<const LinearOpBase<Scalar> > &block
    );
  void endBlockFill();
  void uninitialize();



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



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



                                                
  std::string description() const;

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


protected:


  bool opSupported(ETransp M_trans) const;

  void apply(
    const ETransp                     M_trans
    ,const MultiVectorBase<Scalar>    &X
    ,MultiVectorBase<Scalar>          *Y
    ,const Scalar                     alpha
    ,const Scalar                     beta
    ) const;
  

private:

  // ///////////////////
  // Private types

  typedef Teuchos::ConstNonconstObjectContainer<LinearOpBase<Scalar> > CNCLO;
  typedef Teuchos::Array<Teuchos::RCP<const VectorSpaceBase<Scalar> > > vec_array_t;

  template<class Scalar2>
  struct BlockEntry {
    BlockEntry() : i(-1), j(-1) {}
    BlockEntry( const int i_in, const int j_in, const CNCLO &block_in )
      :i(i_in),j(j_in),block(block_in)
      {}
    int      i;
    int      j;
    CNCLO    block;
  };

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

  Teuchos::RCP<const ProductVectorSpaceBase<Scalar> >  productRange_;
  Teuchos::RCP<const ProductVectorSpaceBase<Scalar> >  productDomain_;
  int                                                          numRowBlocks_; // M
  int                                                          numColBlocks_; // N
 
  std::vector<CNCLO>                   Ops_;        // Final M x N storage
 
  vec_array_t                          rangeBlocks_;
  vec_array_t                          domainBlocks_;
  std::vector<BlockEntry<Scalar> >     Ops_stack_;  // Temp stack of ops begin filled (if Ops_.size()==0).
 bool                                  blockFillIsActive_;

  // ///////////////////////////
  // Private member functions
  
  void resetStorage( const int numRowBlocks, const int numColBlocks  );
  void assertBlockFillIsActive(bool) const;
  void assertBlockRowCol(const int i, const int j) const;
  void setBlockSpaces(
    const int i, const int j, const LinearOpBase<Scalar> &block
    );
  template<class LinearOpType>
  void setBlockImpl(
    const int i, const int j
    ,const Teuchos::RCP<LinearOpType> &block
    );

  // Not defined and not to be called
  DefaultBlockedLinearOp(const DefaultBlockedLinearOp&);
  DefaultBlockedLinearOp& operator=(const DefaultBlockedLinearOp&);

};

template<class Scalar>
Teuchos::RCP<const LinearOpBase<Scalar> >
block2x2(
  const Teuchos::RCP<const LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<const LinearOpBase<Scalar> >   &A01
  ,const Teuchos::RCP<const LinearOpBase<Scalar> >   &A10
  ,const Teuchos::RCP<const LinearOpBase<Scalar> >   &A11
  );

template<class Scalar>
Teuchos::RCP<const LinearOpBase<Scalar> >
block2x1(
  const Teuchos::RCP<const LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<const LinearOpBase<Scalar> >   &A10
  );

template<class Scalar>
Teuchos::RCP<const LinearOpBase<Scalar> >
block1x2(
  const Teuchos::RCP<const LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<const LinearOpBase<Scalar> >   &A01
  );

template<class Scalar>
Teuchos::RCP<LinearOpBase<Scalar> >
nonconstBlock2x2(
  const Teuchos::RCP<LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<LinearOpBase<Scalar> >   &A01
  ,const Teuchos::RCP<LinearOpBase<Scalar> >   &A10
  ,const Teuchos::RCP<LinearOpBase<Scalar> >   &A11
  );

template<class Scalar>
Teuchos::RCP<LinearOpBase<Scalar> >
nonconstBlock2x1(
  const Teuchos::RCP<LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<LinearOpBase<Scalar> >   &A10
  );

template<class Scalar>
Teuchos::RCP<LinearOpBase<Scalar> >
nonconstBlock1x2(
  const Teuchos::RCP<LinearOpBase<Scalar> >    &A00
  ,const Teuchos::RCP<LinearOpBase<Scalar> >   &A01
  );

} // namespace Thyra

#endif  // THYRA_DEFAULT_BLOCKED_LINEAR_OP_DECL_HPP

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