Thyra_DefaultProductVectorSpace_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_PRODUCT_VECTOR_SPACE_DECL_HPP
#define THYRA_DEFAULT_PRODUCT_VECTOR_SPACE_DECL_HPP

#include "Thyra_ProductVectorSpaceBase.hpp"
#include "Thyra_VectorSpaceDefaultBase.hpp"
#include "Teuchos_implicit_cast.hpp"

namespace Thyra {


template<class Scalar>
class DefaultProductVectorSpace
  : virtual public ProductVectorSpaceBase<Scalar>,
    virtual protected VectorSpaceDefaultBase<Scalar>
{
public:


  DefaultProductVectorSpace();

  DefaultProductVectorSpace(
    const ArrayView<const RCP<const VectorSpaceBase<Scalar> > > &vecSpaces
    );
  
  virtual void initialize(
    const ArrayView<const RCP<const VectorSpaceBase<Scalar> > > &vecSpaces
    );

  bool hasBeenCloned() const;

  virtual void uninitialize(
    const ArrayView<RCP<const VectorSpaceBase<Scalar> > > &vecSpaces = Teuchos::null
    );

  virtual const RCP<const VectorSpaceBase<Scalar> >* vecSpaces() const;

  virtual const Ordinal* vecSpacesOffsets() const;

  void getVecSpcPoss( Ordinal i, int* kth_vector_space, Ordinal* kth_global_offset ) const;
  


  int numBlocks() const;
  RCP<const VectorSpaceBase<Scalar> > getBlock(const int k) const; 



  Ordinal dim() const;

  bool isCompatible( const VectorSpaceBase<Scalar>& vecSpc ) const;

  RCP< VectorBase<Scalar> > createMember() const;

  Scalar scalarProd(
    const VectorBase<Scalar>& x, const VectorBase<Scalar>& y ) const;

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

  bool hasInCoreView(const Range1D& rng, const EViewType viewType,
    const EStrideType strideType) const;

  RCP< const VectorSpaceFactoryBase<Scalar> > smallVecSpcFcty() const;

  RCP< MultiVectorBase<Scalar> > createMembers(int numMembers) const;

  RCP< const VectorSpaceBase<Scalar> > clone() const;


                                                
  std::string description() const;

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


protected:

  // ///////////////////////////////////
  // Protected member functions

private:
 
  // ///////////////////////////////////
  // Private types

  typedef Array<RCP<const VectorSpaceBase<Scalar> > > vecSpaces_t;
  typedef Array<Ordinal> vecSpacesOffsets_t;
 
  // ///////////////////////////////////
  // Private data members

  int numBlocks_;
  RCP<vecSpaces_t> vecSpaces_;
  RCP<vecSpacesOffsets_t> vecSpacesOffsets_;
  // cached info
  Ordinal dim_;
  bool isInCore_;

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

  void assertInitialized() const;

};


template<class Scalar>
inline
RCP<DefaultProductVectorSpace<Scalar> >
productVectorSpace()
{
  return Teuchos::rcp(new DefaultProductVectorSpace<Scalar>);
}


template<class Scalar>
inline
RCP<DefaultProductVectorSpace<Scalar> >
productVectorSpace(
  const ArrayView<RCP<const VectorSpaceBase<Scalar> > > &vecSpaces
  )
{
  return Teuchos::rcp(new DefaultProductVectorSpace<Scalar>(vecSpaces));
}


template<class Scalar>
inline
RCP<DefaultProductVectorSpace<Scalar> >
productVectorSpace(
  const RCP<const VectorSpaceBase<Scalar> > &vecSpace,
  const int numBlocks
  )
{
  Array<RCP<const VectorSpaceBase<Scalar> > > vecSpaceBlocks;
  for ( int i = 0; i < numBlocks; ++i )
    vecSpaceBlocks.push_back(vecSpace);
  return productVectorSpace<Scalar>(vecSpaceBlocks());
}


// /////////////////////////////////
// Inline members


template<class Scalar>
inline const RCP<const VectorSpaceBase<Scalar> >*
DefaultProductVectorSpace<Scalar>::vecSpaces() const
{
  return ( dim_ ? &(*vecSpaces_)[0] : NULL );
}


template<class Scalar>
inline const Ordinal*
DefaultProductVectorSpace<Scalar>::vecSpacesOffsets() const
{
  return ( dim_ ? &(*vecSpacesOffsets_)[0] : NULL );
}


template<class Scalar>
inline bool DefaultProductVectorSpace<Scalar>::hasBeenCloned() const
{
  return vecSpaces_.strong_count() > 1;
}


template<class Scalar>
inline
void DefaultProductVectorSpace<Scalar>::assertInitialized() const
{
  using Teuchos::implicit_cast;
#ifdef TEUCHOS_DEBUG
  TEUCHOS_TEST_FOR_EXCEPT( is_null(vecSpaces_) );
#endif
}


} // namespace Thyra


#endif // THYRA_DEFAULT_PRODUCT_VECTOR_SPACE_DECL_HPP