AnasaziMultiVec.hpp

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// @HEADER
// *****************************************************************************
//                 Anasazi: Block Eigensolvers Package
//
// Copyright 2004 NTESS and the Anasazi contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef ANASAZI_MULTI_VEC_HPP
#define ANASAZI_MULTI_VEC_HPP


#include "AnasaziConfigDefs.hpp"
#include "AnasaziMultiVecTraits.hpp"

namespace Anasazi {

template <class ScalarType>
class MultiVec {
public:

  MultiVec() {}

  virtual ~MultiVec () {}



  virtual MultiVec<ScalarType> * Clone ( const int numvecs ) const = 0;

  virtual MultiVec<ScalarType> * CloneCopy () const = 0;
  
  virtual MultiVec<ScalarType> * CloneCopy ( const std::vector<int>& index ) const = 0;

  virtual MultiVec<ScalarType> * CloneViewNonConst ( const std::vector<int>& index ) = 0;
  
  virtual const MultiVec<ScalarType> * CloneView ( const std::vector<int>& index ) const = 0;



  virtual ptrdiff_t GetGlobalLength () const = 0;

  virtual int GetNumberVecs () const = 0;



  virtual void 
  MvTimesMatAddMv (ScalarType alpha, 
       const MultiVec<ScalarType>& A, 
       const Teuchos::SerialDenseMatrix<int,ScalarType>& B, ScalarType beta) = 0;

  virtual void MvAddMv ( ScalarType alpha, const MultiVec<ScalarType>& A, ScalarType beta, const MultiVec<ScalarType>& B ) = 0;

  virtual void MvScale ( ScalarType alpha ) = 0;

  virtual void MvScale ( const std::vector<ScalarType>& alpha ) = 0;

  virtual void MvTransMv ( ScalarType alpha, const MultiVec<ScalarType>& A, Teuchos::SerialDenseMatrix<int,ScalarType>& B
#ifdef HAVE_ANASAZI_EXPERIMENTAL
         , ConjType conj = Anasazi::CONJ
#endif         
         ) const = 0;

  virtual void MvDot ( const MultiVec<ScalarType>& A, std::vector<ScalarType> & b 
#ifdef HAVE_ANASAZI_EXPERIMENTAL
           , ConjType conj = Anasazi::CONJ
#endif
           ) const = 0;
  


  virtual void MvNorm ( std::vector<typename Teuchos::ScalarTraits<ScalarType>::magnitudeType> & normvec ) const = 0;



  virtual void SetBlock ( const MultiVec<ScalarType>& A, const std::vector<int>& index ) = 0;
  
  virtual void MvRandom () = 0;

  virtual void MvInit ( ScalarType alpha ) = 0;



  virtual void MvPrint ( std::ostream& os ) const = 0;

#ifdef HAVE_ANASAZI_TSQR


  virtual void 
  factorExplicit (MultiVec<ScalarType>& Q, 
      Teuchos::SerialDenseMatrix<int, ScalarType>& R,
      const bool forceNonnegativeDiagonal=false)
  {
    TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error, "The Anasazi::MultiVec<" 
      << Teuchos::TypeNameTraits<ScalarType>::name() << "> subclass which you "
      "are using does not implement the TSQR-related method factorExplicit().");
  }

  virtual int
  revealRank (Teuchos::SerialDenseMatrix<int, ScalarType>& R,
        const typename Teuchos::ScalarTraits<ScalarType>::magnitudeType& tol)
  {
    TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error, "The Anasazi::MultiVec<" 
      << Teuchos::TypeNameTraits<ScalarType>::name() << "> subclass which you "
      "are using does not implement the TSQR-related method revealRank().");
  }

#endif // HAVE_ANASAZI_TSQR
};

namespace details {
template<class ScalarType>
class MultiVecTsqrAdapter {
public:
  typedef MultiVec<ScalarType> MV;
  typedef ScalarType scalar_type; 
  typedef int ordinal_type; // This doesn't matter either
  typedef int node_type; // Nor does this
  typedef Teuchos::SerialDenseMatrix<ordinal_type, scalar_type> dense_matrix_type;
  typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitude_type;
  
  void
  factorExplicit (MV& A,
      MV& Q,
      dense_matrix_type& R,
      const bool forceNonnegativeDiagonal=false)
  {
    A.factorExplicit (Q, R, forceNonnegativeDiagonal);
  }

  int
  revealRank (MV& Q,
        dense_matrix_type& R,
        const magnitude_type& tol)
  {
    return Q.revealRank (R, tol);
  }
};
} // namespace details

  template<class ScalarType>
  class MultiVecTraits<ScalarType,MultiVec<ScalarType> > {
  public:


    static Teuchos::RCP<MultiVec<ScalarType> > 
    Clone (const MultiVec<ScalarType>& mv, const int numvecs) {
      return Teuchos::rcp (const_cast<MultiVec<ScalarType>&> (mv).Clone (numvecs)); 
    }

    static Teuchos::RCP<MultiVec<ScalarType> > CloneCopy( const MultiVec<ScalarType>& mv )
    { return Teuchos::rcp( const_cast<MultiVec<ScalarType>&>(mv).CloneCopy() ); }

    static Teuchos::RCP<MultiVec<ScalarType> > CloneCopy( const MultiVec<ScalarType>& mv, const std::vector<int>& index )
    { return Teuchos::rcp( const_cast<MultiVec<ScalarType>&>(mv).CloneCopy(index) ); }

    static Teuchos::RCP<MultiVec<ScalarType> > CloneViewNonConst( MultiVec<ScalarType>& mv, const std::vector<int>& index )
    { return Teuchos::rcp( mv.CloneViewNonConst(index) ); }

    static Teuchos::RCP<const MultiVec<ScalarType> > CloneView( const MultiVec<ScalarType>& mv, const std::vector<int>& index )
    { return Teuchos::rcp( const_cast<MultiVec<ScalarType>&>(mv).CloneView(index) ); }




    static ptrdiff_t GetGlobalLength( const MultiVec<ScalarType>& mv )
    { return mv.GetGlobalLength(); }

    static int GetNumberVecs( const MultiVec<ScalarType>& mv )
    { return mv.GetNumberVecs(); }




    static void MvTimesMatAddMv( ScalarType alpha, const MultiVec<ScalarType>& A, 
         const Teuchos::SerialDenseMatrix<int,ScalarType>& B, 
         ScalarType beta, MultiVec<ScalarType>& mv )
    { mv.MvTimesMatAddMv(alpha, A, B, beta); }

    static void MvAddMv( ScalarType alpha, const MultiVec<ScalarType>& A, ScalarType beta, const MultiVec<ScalarType>& B, MultiVec<ScalarType>& mv )
    { mv.MvAddMv(alpha, A, beta, B); }

    static void MvTransMv( ScalarType alpha, const MultiVec<ScalarType>& A, const MultiVec<ScalarType>& mv, Teuchos::SerialDenseMatrix<int,ScalarType>& B
#ifdef HAVE_ANASAZI_EXPERIMENTAL
         , ConjType conj = Anasazi::CONJ
#endif
         )
    { mv.MvTransMv(alpha, A, B
#ifdef HAVE_ANASAZI_EXPERIMENTAL
       , conj
#endif
       ); }
    
    static void MvDot( const MultiVec<ScalarType>& mv, const MultiVec<ScalarType>& A, std::vector<ScalarType> & b
#ifdef HAVE_ANASAZI_EXPERIMENTAL
           , ConjType conj = Anasazi::CONJ
#endif
           )
    { mv.MvDot( A, b
#ifdef HAVE_ANASAZI_EXPERIMENTAL
    , conj
#endif
    ); }

    static void MvScale ( MultiVec<ScalarType>& mv, ScalarType alpha )
    { mv.MvScale( alpha ); }
    
    static void MvScale ( MultiVec<ScalarType>& mv, const std::vector<ScalarType>& alpha )
    { mv.MvScale( alpha ); }
    


    static void MvNorm( const MultiVec<ScalarType>& mv, std::vector<typename Teuchos::ScalarTraits<ScalarType>::magnitudeType> & normvec )
    { mv.MvNorm(normvec); }



    static void SetBlock( const MultiVec<ScalarType>& A, const std::vector<int>& index, MultiVec<ScalarType>& mv )
    { mv.SetBlock(A, index); }

    static void MvRandom( MultiVec<ScalarType>& mv )
    { mv.MvRandom(); }

    static void MvInit( MultiVec<ScalarType>& mv, ScalarType alpha = Teuchos::ScalarTraits<ScalarType>::zero() )
    { mv.MvInit(alpha); }



    static void MvPrint( const MultiVec<ScalarType>& mv, std::ostream& os )
    { mv.MvPrint(os); }


#ifdef HAVE_ANASAZI_TSQR
    typedef details::MultiVecTsqrAdapter<ScalarType> tsqr_adaptor_type;
#endif // HAVE_ANASAZI_TSQR
  };

} // namespace Anasazi

#endif

// end of file AnasaziMultiVec.hpp