AnasaziEpetraAdapter.hpp

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// ***********************************************************************
//
//                 Anasazi: Block Eigensolvers Package
//                 Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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#ifndef ANASAZI_EPETRA_ADAPTER_HPP
#define ANASAZI_EPETRA_ADAPTER_HPP

#include "AnasaziConfigDefs.hpp"
#include "AnasaziTypes.hpp"
#include "AnasaziMultiVec.hpp"
#include "AnasaziOperator.hpp"

#include "Teuchos_SerialDenseMatrix.hpp"
#include "Epetra_MultiVector.h"
#include "Epetra_Operator.h"
#include "Epetra_Map.h"
#include "Epetra_LocalMap.h"

namespace Anasazi {
  
  //
  //--------template class AnasaziEpetraMultiVec-----------------
  //
  
  class EpetraMultiVec : public MultiVec<double>, public Epetra_MultiVector {
  public:



    EpetraMultiVec(const Epetra_BlockMap& Map, const int numvecs);

    EpetraMultiVec(const Epetra_MultiVector & P_vec);
    

    EpetraMultiVec(const Epetra_BlockMap& Map, double * array, const int numvecs, const int stride=0);


    EpetraMultiVec(Epetra_DataAccess CV, const Epetra_MultiVector& P_vec, const std::vector<int>& index);

    virtual ~EpetraMultiVec() {};




    MultiVec<double> * Clone ( const int numvecs ) const;

    MultiVec<double> * CloneCopy () const;

    MultiVec<double> * CloneCopy ( const std::vector<int>& index ) const;
    
    MultiVec<double> * CloneView ( const std::vector<int>& index );




    int GetNumberVecs () const { return NumVectors(); }

    int GetVecLength () const { return GlobalLength(); }




    void MvTimesMatAddMv ( const double alpha, const MultiVec<double>& A, 
         const Teuchos::SerialDenseMatrix<int,double>& B, const double beta );

    void MvAddMv ( const double alpha, const MultiVec<double>& A, const double beta,
       const MultiVec<double>& B);

    void MvTransMv ( const double alpha, const MultiVec<double>& A, Teuchos::SerialDenseMatrix<int,double>& B 
#ifdef HAVE_ANASAZI_EXPERIMENTAL
         , ConjType conj = Anasazi::CONJ
#endif
         ) const;
  
    void MvDot ( const MultiVec<double>& A, std::vector<double>* b
#ifdef HAVE_ANASAZI_EXPERIMENTAL
     , ConjType conj = Anasazi::CONJ
#endif
     ) const;

    void MvScale ( const double alpha ) { int ret = this->Scale( alpha ); assert(ret == 0); }
    
    void MvScale ( const std::vector<double>& alpha );



    
    void MvNorm ( std::vector<double>* normvec ) const {
      if ((normvec!=NULL) && ((int)normvec->size() >= GetNumberVecs()) ) {
  int ret = Norm2(&(*normvec)[0]);
  assert( ret == 0 );
      }
    };



    void SetBlock ( const MultiVec<double>& A, const std::vector<int>& index );

    void MvRandom() { int ret = Random(); assert( ret == 0 ); };

    void MvInit ( const double alpha ) { int ret = PutScalar( alpha ); assert( ret == 0 ); };




    void MvPrint( ostream& os ) const { os << *this << endl; };

  private:
  };
  //-------------------------------------------------------------
  
  //
  //--------template class AnasaziEpetraOp---------------------
  //
  
  class EpetraOp : public virtual Operator<double> {
  public:

    
    EpetraOp(const Teuchos::RefCountPtr<Epetra_Operator> &Op );
    
    ~EpetraOp();
    

    
    void Apply ( const MultiVec<double>& X, MultiVec<double>& Y ) const;
    
  private:
    Teuchos::RefCountPtr<Epetra_Operator> Epetra_Op;
  };
  //-------------------------------------------------------------

  //
  //--------template class AnasaziEpetraGenOp--------------------
  //
  
  class EpetraGenOp : public virtual Operator<double>, public virtual Epetra_Operator {
  public:

    EpetraGenOp(const Teuchos::RefCountPtr<Epetra_Operator> &AOp, 
                const Teuchos::RefCountPtr<Epetra_Operator> &MOp,
    bool isAInverse = true );

    ~EpetraGenOp();
    

    void Apply ( const MultiVec<double>& X, MultiVec<double>& Y ) const; 


    int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const;


    int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const;

    const char* Label() const { return "Epetra_Operator applying A^{-1}M"; };
    
    bool UseTranspose() const { return (false); };

    int SetUseTranspose(bool UseTranspose) { return 0; };
    
    bool HasNormInf() const { return (false); };
    
    double NormInf() const  { return (-1.0); };
    
    const Epetra_Comm& Comm() const { return Epetra_AOp->Comm(); };

    const Epetra_Map& OperatorDomainMap() const { return Epetra_AOp->OperatorDomainMap(); };

    const Epetra_Map& OperatorRangeMap() const { return Epetra_AOp->OperatorRangeMap(); };

  private:
    bool isAInverse;
    Teuchos::RefCountPtr<Epetra_Operator> Epetra_AOp;
    Teuchos::RefCountPtr<Epetra_Operator> Epetra_MOp;
  };
  
  //
  //--------template class AnasaziEpetraSymOp--------------------
  //

  class EpetraSymOp : public virtual Operator<double>, public virtual Epetra_Operator {
  public:

    EpetraSymOp(const Teuchos::RefCountPtr<Epetra_Operator> &Op, const bool isTrans = false );

    ~EpetraSymOp();
    

    void Apply ( const MultiVec<double>& X, MultiVec<double>& Y ) const; 


    int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const;


    int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const;

    const char* Label() const { return "Epetra_Operator applying A^TA or AA^T"; };
    
    bool UseTranspose() const { return (false); };

    int SetUseTranspose(bool UseTranspose) { return 0; };
    
    bool HasNormInf() const { return (false); };
    
    double NormInf() const  { return (-1.0); };
    
    const Epetra_Comm& Comm() const { return Epetra_Op->Comm(); };

    const Epetra_Map& OperatorDomainMap() const { return Epetra_Op->OperatorDomainMap(); };

    const Epetra_Map& OperatorRangeMap() const { return Epetra_Op->OperatorRangeMap(); };

  private:
    Teuchos::RefCountPtr<Epetra_Operator> Epetra_Op;
    bool isTrans_;
  };


  //
  //--------template class AnasaziEpetraSymMVOp---------------------
  //

  class EpetraSymMVOp : public virtual Operator<double> {
  public:

    EpetraSymMVOp(const Teuchos::RefCountPtr<Epetra_MultiVector> &MV, 
      const bool isTrans = false );
    
    ~EpetraSymMVOp() {};
    

    void Apply ( const MultiVec<double>& X, MultiVec<double>& Y ) const; 

  private:
    Teuchos::RefCountPtr<Epetra_MultiVector> Epetra_MV;
    Teuchos::RefCountPtr<const Epetra_Map> MV_localmap;
    Teuchos::RefCountPtr<const Epetra_BlockMap> MV_blockmap;
    bool isTrans_;
  };

  
  //
  // Implementation of the Anasazi::MultiVecTraits for Epetra::MultiVector.
  //

  template<>
  class MultiVecTraits<double, Epetra_MultiVector>
  {
  public:



    static Teuchos::RefCountPtr<Epetra_MultiVector> Clone( const Epetra_MultiVector& mv, const int numvecs )
    { return Teuchos::rcp( new Epetra_MultiVector(mv.Map(), numvecs) ); }

    static Teuchos::RefCountPtr<Epetra_MultiVector> CloneCopy( const Epetra_MultiVector& mv )
    { return Teuchos::rcp( new Epetra_MultiVector( mv ) ); }

    static Teuchos::RefCountPtr<Epetra_MultiVector> CloneCopy( const Epetra_MultiVector& mv, const std::vector<int>& index )
    { 
      std::vector<int>& tmp_index = const_cast<std::vector<int> &>( index );
      return Teuchos::rcp( new Epetra_MultiVector(::Copy, mv, &tmp_index[0], index.size()) ); 
    }

    static Teuchos::RefCountPtr<Epetra_MultiVector> CloneView( Epetra_MultiVector& mv, const std::vector<int>& index )
    { 
      std::vector<int>& tmp_index = const_cast<std::vector<int> &>( index );
      return Teuchos::rcp( new Epetra_MultiVector(::View, mv, &tmp_index[0], index.size()) ); 
    }

    static Teuchos::RefCountPtr<const Epetra_MultiVector> CloneView( const Epetra_MultiVector& mv, const std::vector<int>& index )
    { 
      std::vector<int>& tmp_index = const_cast<std::vector<int> &>( index );
      return Teuchos::rcp( new Epetra_MultiVector(::View, mv, &tmp_index[0], index.size()) ); 
    }




    static int GetVecLength( const Epetra_MultiVector& mv )
    { return mv.GlobalLength(); }

    static int GetNumberVecs( const Epetra_MultiVector& mv )
    { return mv.NumVectors(); }



    static void MvTimesMatAddMv( const double alpha, const Epetra_MultiVector& A, 
         const Teuchos::SerialDenseMatrix<int,double>& B, 
         const double beta, Epetra_MultiVector& mv )
    { 
      Epetra_LocalMap LocalMap(B.numRows(), 0, mv.Map().Comm());
      Epetra_MultiVector B_Pvec(::Copy, LocalMap, B.values(), B.stride(), B.numCols());

      int ret = mv.Multiply( 'N', 'N', alpha, A, B_Pvec, beta );
      assert( ret == 0 );   
    }

    static void MvAddMv( const double alpha, const Epetra_MultiVector& A, const double beta, const Epetra_MultiVector& B, Epetra_MultiVector& mv )
    { 
      int ret = mv.Update( alpha, A, beta, B, 0.0 );
      assert( ret == 0 );
    }

    static void MvTransMv( const double alpha, const Epetra_MultiVector& A, const Epetra_MultiVector& mv, Teuchos::SerialDenseMatrix<int,double>& B
#ifdef HAVE_ANASAZI_EXPERIMENTAL
         , ConjType conj = Anasazi::CONJ
#endif
         )
    { 
      Epetra_LocalMap LocalMap(B.numRows(), 0, mv.Map().Comm());
      Epetra_MultiVector B_Pvec(::View, LocalMap, B.values(), B.stride(), B.numCols());
      
      int ret = B_Pvec.Multiply( 'T', 'N', alpha, A, mv, 0.0 );
      assert( ret == 0 );
    }
    
    static void MvDot( const Epetra_MultiVector& mv, const Epetra_MultiVector& A, std::vector<double>* b
#ifdef HAVE_ANASAZI_EXPERIMENTAL
           , ConjType conj = Anasazi::CONJ
#endif
           )
    {
      int ret = mv.Dot( A, &(*b)[0] );
      assert( ret == 0 );
    }




    static void MvNorm( const Epetra_MultiVector& mv, std::vector<double>* normvec )
    { 
      int ret = mv.Norm2(&(*normvec)[0]);
      assert( ret == 0 );
    }




    static void SetBlock( const Epetra_MultiVector& A, const std::vector<int>& index, Epetra_MultiVector& mv )
    { 
      // Extract the "numvecs" columns of mv indicated by the index vector.
      int numvecs = index.size();
      std::vector<int>& tmp_index = const_cast<std::vector<int> &>( index );
      Epetra_MultiVector temp_vec(::View, mv, &tmp_index[0], numvecs);

      if ( A.NumVectors() != numvecs ) {
        std::vector<int> index2( numvecs );
        for(int i=0; i<numvecs; i++)
    index2[i] = i;
        Epetra_MultiVector A_vec(::View, A, &index2[0], numvecs);      
        int ret = temp_vec.Update( 1.0, A_vec, 0.0, A_vec, 0.0 );
  assert( ret == 0 );
      }
      else {
        int ret = temp_vec.Update( 1.0, A, 0.0, A, 0.0 );
  assert( ret == 0 );
      }
    }

    void MvScale ( const double alpha, Epetra_MultiVector& mv ) 
    { int ret = mv.Scale( alpha ); 
      assert( ret == 0 );
    }
    
    void MvScale ( const std::vector<double>& alpha, Epetra_MultiVector& mv )
    { 
      // Check to make sure the vector is as long as the multivector has columns.
      int numvecs = mv.NumVectors();
      assert( (int)alpha.size() == numvecs );

      int ret = 0;
      std::vector<int> tmp_index( 1, 0 );
      for (int i=0; i<numvecs; i++) {
  Epetra_MultiVector temp_vec(::View, mv, &tmp_index[0], 1);
        ret = temp_vec.Scale( alpha[i] );
  assert (ret == 0);
  tmp_index[0]++;
      }
    }

    static void MvRandom( Epetra_MultiVector& mv )
    { int ret = mv.Random(); assert( ret == 0 ); }

    static void MvInit( Epetra_MultiVector& mv, double alpha = Teuchos::ScalarTraits<double>::zero() )
    { int ret = mv.PutScalar(alpha); assert( ret == 0 ); }




    static void MvPrint( const Epetra_MultiVector& mv, ostream& os )
    { os << mv << endl; }

  };        

  //
  // Implementation of the Anasazi::OperatorTraits for Epetra::Operator.
  //

  template <> 
  class OperatorTraits < double, Epetra_MultiVector, Epetra_Operator >
  {
  public:
    
    static void Apply ( const Epetra_Operator& Op, 
            const Epetra_MultiVector& x, 
            Epetra_MultiVector& y )
    { 
      TEST_FOR_EXCEPTION( Op.Apply( x, y ) != 0, OperatorError, "Error in Epetra_Operator::Apply()!" );
    }
    
  };
  
} // end of Anasazi namespace 

#endif 
// end of file ANASAZI_EPETRA_ADAPTER_HPP

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