Stokhos_PCECovarianceOp.hpp

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// @HEADER
// *****************************************************************************
//                           Stokhos Package
//
// Copyright 2009 NTESS and the Stokhos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef STOKHOS_PCE_COVARIANCE_OP_HPP
#define STOKHOS_PCE_COVARIANCE_OP_HPP

#include "Teuchos_RCP.hpp"
#include "Teuchos_Array.hpp"
#include "Epetra_Operator.h"
#include "EpetraExt_BlockVector.h"
#include "Stokhos_VectorOrthogPoly.hpp"
#include "Stokhos_VectorOrthogPolyTraitsEpetra.hpp"

namespace Stokhos {
    
  class PCECovarianceOp : public Epetra_Operator {
  public:

    PCECovarianceOp(const Stokhos::VectorOrthogPoly<Epetra_Vector>& X_poly);

    PCECovarianceOp(const Teuchos::RCP<const EpetraExt::BlockVector>& X,
        const Stokhos::OrthogPolyBasis<int,double>& basis);

    PCECovarianceOp(const Teuchos::RCP<const Epetra_MultiVector>& X,
        const Stokhos::OrthogPolyBasis<int,double>& basis);
    
    virtual ~PCECovarianceOp();
    
    virtual int SetUseTranspose(bool UseTranspose);
    
    virtual int Apply(const Epetra_MultiVector& Input, 
                      Epetra_MultiVector& Result) const;

    virtual int ApplyInverse(const Epetra_MultiVector& X, 
                             Epetra_MultiVector& Y) const;
    
    virtual double NormInf() const;
    
    virtual const char* Label () const;
  
    virtual bool UseTranspose() const;
    
    virtual bool HasNormInf() const;

    virtual const Epetra_Comm & Comm() const;

    virtual const Epetra_Map& OperatorDomainMap () const;

    virtual const Epetra_Map& OperatorRangeMap () const;

    const Epetra_BlockMap& CoeffMap() const;

  private:
    
    PCECovarianceOp(const PCECovarianceOp&);
    
    PCECovarianceOp& operator=(const PCECovarianceOp&);
    
  protected:
    
    std::string label;

    Teuchos::RCP<const Epetra_MultiVector> X;

    Teuchos::Array<double> s;

    bool useTranspose;

    Teuchos::RCP<Epetra_Map> tmp_map;

    mutable Teuchos::RCP<Epetra_MultiVector> tmp;

  }; // class PCECovarianceOp
  
} // namespace Stokhos

#endif // STOKHOS_PCE_COVARIANCE_OP_HPP