discrete_inverse_sparse_boundary_operator.hpp

// Copyright (C) 2011-2012 by the BEM++ Authors
//
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// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// THE SOFTWARE.

#ifndef bempp_discrete_inverse_sparse_boundary_operator_hpp
#define bempp_discrete_inverse_sparse_boundary_operator_hpp

#include "../common/common.hpp"

#include "bempp/common/config_trilinos.hpp"

#ifdef WITH_TRILINOS
#include "discrete_boundary_operator.hpp"

#include "symmetry.hpp"
#include "../common/shared_ptr.hpp"

#include <memory>

#include <Teuchos_RCP.hpp>
#include <Thyra_SpmdVectorSpaceBase_decl.hpp>

class Amesos_BaseSolver;
class Epetra_LinearProblem;
class Epetra_CrsMatrix;
namespace Bempp
{

template <typename ValueType>
class DiscreteInverseSparseBoundaryOperator :
        public DiscreteBoundaryOperator<ValueType>
{
public:
    DiscreteInverseSparseBoundaryOperator(
            const shared_ptr<const Epetra_CrsMatrix>& mat,
            int symmetry = NO_SYMMETRY);
    ~DiscreteInverseSparseBoundaryOperator();

    virtual unsigned int rowCount() const;
    virtual unsigned int columnCount() const;

    virtual void addBlock(const std::vector<int>& rows,
                          const std::vector<int>& cols,
                          const ValueType alpha,
                          arma::Mat<ValueType>& block) const;

public:
    virtual Teuchos::RCP<const Thyra::VectorSpaceBase<ValueType> > domain() const;
    virtual Teuchos::RCP<const Thyra::VectorSpaceBase<ValueType> > range() const;

protected:
    virtual bool opSupportedImpl(Thyra::EOpTransp M_trans) const;

private:
    virtual void applyBuiltInImpl(const TranspositionMode trans,
                                  const arma::Col<ValueType>& x_in,
                                  arma::Col<ValueType>& y_inout,
                                  const ValueType alpha,
                                  const ValueType beta) const;

private:
    shared_ptr<const Epetra_CrsMatrix> m_mat;
    std::auto_ptr<Epetra_LinearProblem> m_problem;
    Teuchos::RCP<const Thyra::SpmdVectorSpaceBase<ValueType> > m_space;
    int m_symmetry;
    std::auto_ptr<Amesos_BaseSolver> m_solver;
};

template <typename ValueType>
shared_ptr<const DiscreteBoundaryOperator<ValueType> >
discreteSparseInverse(const shared_ptr<const DiscreteBoundaryOperator<ValueType> >& discreteOp);

} // namespace Bempp

#endif // WITH_TRILINOS

#endif