Sacado_ScalarParameterEntry.hpp

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// $Id$ 
// $Source$ 
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// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
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// This library is distributed in the hope that it will be useful, but
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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#ifndef SACADO_SCALARPARAMETERENTRY_HPP
#define SACADO_SCALARPARAMETERENTRY_HPP

#include "Sacado_Traits.hpp"
#include "Sacado_mpl_apply.hpp"

namespace Sacado {


  struct DefaultEvalTypeTraits { 
    template <class EvalType> struct apply {
      typedef EvalType type; };
  };

  class AbstractScalarParameterEntry {
  public:
  
    AbstractScalarParameterEntry() {}

    virtual ~AbstractScalarParameterEntry() {}

    virtual void setRealValue(double value) = 0;

    virtual double getRealValue() const = 0;

    virtual void print(std::ostream& os) const = 0;
  };

  template <typename EvalType, typename EvalTypeTraits = DefaultEvalTypeTraits>
  class ScalarParameterEntry : public AbstractScalarParameterEntry {

  public:

    typedef typename EvalTypeTraits::template apply<EvalType>::type ScalarT;
  
    ScalarParameterEntry() {}

    virtual ~ScalarParameterEntry() {}


    virtual void setValue(const ScalarT& value) = 0;

    virtual const ScalarT& getValue() const = 0;


    virtual double getRealValue() const {
      return Sacado::ScalarValue<ScalarT>::eval(this->getValue()); 
    }


    virtual void print(std::ostream& os) const {
      os << getValue();
    }

  };
}

#endif