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// $Id$ 
// $Source$ 
// @HEADER
// ***********************************************************************
// 
//                           Stokhos Package
//                 Copyright (2009) 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.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Eric T. Phipps (etphipp@sandia.gov).
// 
// ***********************************************************************
// @HEADER

#ifndef STOKHOS_FULLY_ASSEMBLED_OPERATOR_HPP
#define STOKHOS_FULLY_ASSEMBLED_OPERATOR_HPP

#include "Stokhos_SGOperator.hpp"
#include "EpetraExt_MultiComm.h"
#include "Stokhos_OrthogPolyBasis.hpp"
#include "Stokhos_EpetraSparse3Tensor.hpp"
#include "Teuchos_ParameterList.hpp"
#include "EpetraExt_BlockCrsMatrix.h"
#include <vector>

namespace Stokhos {
    
  /*! 
   * \brief An Epetra operator representing the block stochastic Galerkin
   * operator generated by fully assembling the matrix.
   */
  class FullyAssembledOperator : 
    public Stokhos::SGOperator, 
    public EpetraExt::BlockCrsMatrix {
      
  public:

    //! Constructor 
    FullyAssembledOperator(
      const Teuchos::RCP<const EpetraExt::MultiComm>& sg_comm,
      const Teuchos::RCP<const Stokhos::OrthogPolyBasis<int,double> >& sg_basis,
      const Teuchos::RCP<const Stokhos::EpetraSparse3Tensor>& epetraCijk,
      const Teuchos::RCP<const Epetra_CrsGraph>& base_graph,
      const Teuchos::RCP<const Epetra_Map>& domain_sg_map,
      const Teuchos::RCP<const Epetra_Map>& range_sg_map,
      const Teuchos::RCP<Teuchos::ParameterList>& params);
    
    //! Destructor
    virtual ~FullyAssembledOperator();

    /** \name Stokhos::SGOperator methods */
    //@{

    //! Setup operator
    virtual void setupOperator(
      const Teuchos::RCP<Stokhos::EpetraOperatorOrthogPoly >& poly);

    //! Get SG polynomial
    virtual Teuchos::RCP< Stokhos::EpetraOperatorOrthogPoly > 
    getSGPolynomial();

    //! Get SG polynomial
    virtual Teuchos::RCP<const Stokhos::EpetraOperatorOrthogPoly > 
    getSGPolynomial() const;

    //@}

    /** \name Overloaded Epetra_Operator methods */
    //@{

    /*! 
     * \brief Wrap Apply() to add a timer.
     */
    virtual int Apply(const Epetra_MultiVector& Input, 
                      Epetra_MultiVector& Result) const;

    //@}

  private:
    
    //! Private to prohibit copying
    FullyAssembledOperator(const FullyAssembledOperator&);
    
    //! Private to prohibit copying
    FullyAssembledOperator& operator=(const FullyAssembledOperator&);
    
  protected:

    //! Stores SG parallel communicator
    Teuchos::RCP<const EpetraExt::MultiComm> sg_comm;

    //! Stochastic Galerking basis
    Teuchos::RCP<const Stokhos::OrthogPolyBasis<int,double> > sg_basis;

    //! Stores Epetra Cijk tensor
    Teuchos::RCP<const Stokhos::EpetraSparse3Tensor> epetraCijk;

    //! Stores domain SG map
    Teuchos::RCP<const Epetra_Map> domain_sg_map;

    //! Stores range SG map
    Teuchos::RCP<const Epetra_Map> range_sg_map;

    //! Short-hand for Cijk
    typedef Stokhos::Sparse3Tensor<int,double> Cijk_type;

    //! Stores triple product tensor
    Teuchos::RCP<const Cijk_type> Cijk;

    //! Stores operators
    Teuchos::RCP<Stokhos::EpetraOperatorOrthogPoly > block_ops;

    //! Flag indicating whether operator be scaled with <\psi_i^2>
    bool scale_op;

    //! Flag indicating whether to include mean term
    bool include_mean;
    
    //! Flag indicating whether to only use linear terms
    bool only_use_linear;

  }; // class FullyAssembledOperator
  
} // namespace Stokhos

#endif // STOKHOS_FULLY_ASSEMBLED_OPERATOR_HPP