SatCurveMultiplexerParams.hpp

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
  This file is part of the Open Porous Media project (OPM).
 
  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
 
  OPM is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 
  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/
#ifndef OPM_SAT_CURVE_MULTIPLEXER_PARAMS_HPP
#define OPM_SAT_CURVE_MULTIPLEXER_PARAMS_HPP
 
 
#include "TwoPhaseLETCurves.hpp"
#include "TwoPhaseLETCurvesParams.hpp"
#include "PiecewiseLinearTwoPhaseMaterial.hpp"
#include "PiecewiseLinearTwoPhaseMaterialParams.hpp"
 
#include <opm/material/common/EnsureFinalized.hpp>
 
#include <type_traits>
#include <cassert>
#include <memory>
 
namespace Opm
 
{enum class SatCurveMultiplexerApproach {
    PiecewiseLinearApproach,
    LETApproach
};
 
template <class TraitsT>
class SatCurveMultiplexerParams : public EnsureFinalized
{
public:
    using Traits = TraitsT;
    using Scalar = typename TraitsT::Scalar;
    enum { numPhases = 2 };
 
private:
    using LETTwoPhaseLaw = TwoPhaseLETCurves<Traits>;
    using PLTwoPhaseLaw = PiecewiseLinearTwoPhaseMaterial<Traits>;
 
    using LETParams = typename LETTwoPhaseLaw::Params;
    using PLParams = typename PLTwoPhaseLaw::Params;
 
    template <class ParamT>
    struct Deleter
    {
        inline void operator () ( void* ptr )
        {
            delete static_cast< ParamT* > (ptr);
        }
    };
 
    using ParamPointerType = std::shared_ptr<void>;
 
public:
 
    SatCurveMultiplexerParams() : realParams_()
    {
    }
 
    SatCurveMultiplexerParams(const SatCurveMultiplexerParams& other)
        : realParams_()
    {
        setApproach( other.approach() );
    }
 
    SatCurveMultiplexerParams& operator= ( const SatCurveMultiplexerParams& other )
    {
        realParams_.reset();
        setApproach( other.approach() );
        return *this;
    }
 
    void setApproach(SatCurveMultiplexerApproach newApproach)
    {
        assert(realParams_ == 0);
        approach_ = newApproach;
 
        switch (approach()) {
        case SatCurveMultiplexerApproach::LETApproach:
            realParams_ = ParamPointerType(new LETParams, Deleter< LETParams > () );
            break;
 
        case SatCurveMultiplexerApproach::PiecewiseLinearApproach:
            realParams_ = ParamPointerType(new PLParams, Deleter< PLParams > () );
            break;
        }
    }
 
    SatCurveMultiplexerApproach approach() const
    { return approach_; }
 
    // get the parameter object for the LET curve
    template <SatCurveMultiplexerApproach approachV>
    typename std::enable_if<approachV == SatCurveMultiplexerApproach::LETApproach, LETParams>::type&
    getRealParams()
    {
        assert(approach() == approachV);
        return this->template castTo<LETParams>();
    }
 
    template <SatCurveMultiplexerApproach approachV>
    typename std::enable_if<approachV == SatCurveMultiplexerApproach::LETApproach, const LETParams>::type&
    getRealParams() const
    {
        assert(approach() == approachV);
        return this->template castTo<LETParams>();
    }
 
    // get the parameter object for the PL curve
    template <SatCurveMultiplexerApproach approachV>
    typename std::enable_if<approachV == SatCurveMultiplexerApproach::PiecewiseLinearApproach, PLParams>::type&
    getRealParams()
    {
        assert(approach() == approachV);
        return this->template castTo<PLParams>();
    }
 
    template <SatCurveMultiplexerApproach approachV>
    typename std::enable_if<approachV == SatCurveMultiplexerApproach::PiecewiseLinearApproach, const PLParams>::type&
    getRealParams() const
    {
        assert(approach() == approachV);
        return this->template castTo<PLParams>();
    }
 
private:
    template <class ParamT>
    ParamT& castTo()
    {
        return *(static_cast<ParamT *> (realParams_.operator->()));
    }
 
    template <class ParamT>
    const ParamT& castTo() const
    {
        return *(static_cast<const ParamT *> (realParams_.operator->()));
    }
 
    SatCurveMultiplexerApproach approach_;
    ParamPointerType realParams_;
};
 
} // namespace Opm
 
#endif // OPM_SAT_CURVE_MULTIPLEXER_PARAMS_HPP