EvaluationEmult.hpp

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   Copyright (C) 2004, 2005, 2007 EPFL, Politecnico di Milano, INRIA
   Copyright (C) 2010 EPFL, Politecnico di Milano, Emory UNiversity

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   it under the terms of the GNU Lesser General Public License as published by
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//@HEADER

/*!
 *   @file
     @brief This file contains the definition of the EvaluationEmult class.

     @date 08/2012
     @author Samuel Quinodoz <samuel.quinodoz@epfl.ch>
 */

#ifndef EVALUTATION_EMULT_HPP
#define EVALUTATION_EMULT_HPP


#include <lifev/core/LifeV.hpp>

#include <lifev/eta/array/OperationSmallEmult.hpp>

#include <lifev/eta/expression/ExpressionEmult.hpp>

#include <lifev/core/fem/QuadratureRule.hpp>

namespace LifeV
{

namespace ExpressionAssembly
{

//! Evaluation for the element-wise multiplication between two other Evaluations
/*!
  @author Samuel Quinodoz <samuel.quinodoz@epfl.ch>

  This class aims at representing an element-wise multiplication during the assembly

  This class is an Evaluation class, and therefore, has all the methods
  required to work within the Evaluation trees.
 */
template <typename EvaluationLType, typename EvaluationRType>
class EvaluationEmult
{
public:


    //! @name Public Types
    //@{

    //! Type of the value returned by the left operand
    typedef typename EvaluationLType::return_Type Lreturn_Type;

    //! Type of the value returned by the right operand
    typedef typename EvaluationRType::return_Type Rreturn_Type;

    //! Type of the value returned by this class
    typedef typename OperationSmallEmult< Lreturn_Type, Rreturn_Type >::result_Type return_Type;

    //@}


    //! @name Static constants
    //@{

    //! Flag for the global current FE
    const static flag_Type S_globalUpdateFlag;

    //! Flag for the test current FE
    const static flag_Type S_testUpdateFlag;

    //! Flag for the solution current FE
    const static flag_Type S_solutionUpdateFlag;

    //@}


    //! @name Constructors, destructor
    //@{

    //! Copy constructor
    EvaluationEmult (const EvaluationEmult& eval)
        : M_evaluationL (eval.M_evaluationL),
          M_evaluationR (eval.M_evaluationR)
    {}

    //! Constructor from the corresponding expression
    template< typename ExpressionL, typename ExpressionR>
    explicit EvaluationEmult (const ExpressionEmult<ExpressionL, ExpressionR>& expression)
        : M_evaluationL (expression.left() ),
          M_evaluationR (expression.right() )
    {}

    //! Destructor
    ~EvaluationEmult()
    {}

    //@}


    //! @name Methods
    //@{

    //! Internal update method
    void update (const UInt& iElement)
    {
        M_evaluationL.update (iElement);
        M_evaluationR.update (iElement);
    }

    //! Display method
    static void display (std::ostream& out = std::cout)
    {
        EvaluationLType::display (out);
        out << " emult ";
        EvaluationRType::display (out);
    }

    //@}


    //! @name Set Methods
    //@{

    //! Setter for the global current FE
    template< typename CFEType >
    void setGlobalCFE (const CFEType* globalCFE)
    {
        M_evaluationL.setGlobalCFE (globalCFE);
        M_evaluationR.setGlobalCFE (globalCFE);
    }

    //! Setter for the test current FE
    template< typename CFEType >
    void setTestCFE (const CFEType* testCFE)
    {
        M_evaluationL.setTestCFE (testCFE);
        M_evaluationR.setTestCFE (testCFE);
    }

    //! Setter for the solution FE
    template< typename CFEType >
    void setSolutionCFE (const CFEType* solutionCFE)
    {
        M_evaluationL.setSolutionCFE (solutionCFE);
        M_evaluationR.setSolutionCFE (solutionCFE);
    }

    //! Setter for the quadrature rule
    void setQuadrature (const QuadratureRule& qr)
    {
        M_evaluationL.setQuadrature (qr);
        M_evaluationR.setQuadrature (qr);
    }

    //@}


    //! @name Get Methods
    //@{

    //! Getter for a value
    return_Type value_q (const UInt& q) const
    {
        return M_evaluationL.value_q (q).emult (M_evaluationR.value_q (q) );
    }

    //! Getter for the value for a vector
    return_Type value_qi (const UInt& q, const UInt& i) const
    {
        return M_evaluationL.value_qi (q, i).emult (M_evaluationR.value_qi (q, i) );
    }

    //! Getter for the value for a matrix
    return_Type value_qij (const UInt& q, const UInt& i, const UInt& j) const
    {
        return M_evaluationL.value_qij (q, i, j).emult (M_evaluationR.value_qij (q, i, j) );
    }

    //@}

private:

    //! @name Private Methods
    //@{

    //! No default
    EvaluationEmult();

    //@}

    // Internal storage
    EvaluationLType M_evaluationL;
    EvaluationRType M_evaluationR;
};


template< typename EvaluationLType, typename EvaluationRType>
const flag_Type EvaluationEmult<EvaluationLType, EvaluationRType>::S_globalUpdateFlag
    = EvaluationLType::S_globalUpdateFlag | EvaluationRType::S_globalUpdateFlag;

template< typename EvaluationLType, typename EvaluationRType>
const flag_Type EvaluationEmult<EvaluationLType, EvaluationRType>::S_testUpdateFlag
    = EvaluationLType::S_testUpdateFlag | EvaluationRType::S_testUpdateFlag;

template< typename EvaluationLType, typename EvaluationRType>
const flag_Type EvaluationEmult<EvaluationLType, EvaluationRType>::S_solutionUpdateFlag
    = EvaluationLType::S_solutionUpdateFlag | EvaluationRType::S_solutionUpdateFlag;

} // Namespace ExpressionAssembly

} // Namespace LifeV
#endif