IdentityOperatorContext.h

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/******************************************************************************
 * Copyright (c) 2021.                                                        *
 * The Regents of the University of Michigan and DFT-EFE developers.          *
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 * This file is part of the DFT-EFE code.                                     *
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 * DFT-EFE is free software: you can redistribute it and/or modify            *
 *   it under the terms of the Lesser GNU General Public License as           *
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 *   See the Lesser GNU General Public License for more details.              *
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/*
 * @author Avirup Sircar
 */
 
#ifndef dftefeIdentityOperatorContext_h
#define dftefeIdentityOperatorContext_h
 
#include <utils/MemorySpaceType.h>
#include <linearAlgebra/Vector.h>
#include <linearAlgebra/MultiVector.h>
#include <linearAlgebra/OperatorContext.h>
#include <linearAlgebra/BlasLapackTypedef.h>
namespace dftefe
{
  namespace linearAlgebra
  {
    template <typename ValueTypeOperator,
              typename ValueTypeOperand,
              utils::MemorySpace memorySpace>
    class IdentityOperatorContext
      : public OperatorContext<ValueTypeOperator, ValueTypeOperand, memorySpace>
    {
      //
      // typedefs
      //
    public:
      //
      // alias to define the union of ValueTypeOperator and ValueTypeOperand
      // (e.g., the union of double and complex<double> is complex<double>)
      //
      using ValueTypeUnion =
        blasLapack::scalar_type<ValueTypeOperator, ValueTypeOperand>;
 
    public:
      IdentityOperatorContext();
 
      ~IdentityOperatorContext() = default;
 
      void
      apply(MultiVector<ValueTypeOperand, memorySpace> &X,
            MultiVector<ValueTypeUnion, memorySpace> &  Y) const override;
    };
  } // end of namespace linearAlgebra
} // end of namespace dftefe
#include <linearAlgebra/IdentityOperatorContext.t.cpp>
#endif // dftefeIdentityOperatorContext_h