Tempus_StepperHHTAlphaModifierXBase.hpp

Go to the documentation of this file.

// @HEADER
// ****************************************************************************
//                Tempus: Copyright (2017) Sandia Corporation
//
// Distributed under BSD 3-clause license (See accompanying file Copyright.txt)
// ****************************************************************************
// @HEADER

#ifndef Tempus_StepperHHTAlphaModifierXBase_hpp
#define Tempus_StepperHHTAlphaModifierXBase_hpp

#include "Tempus_config.hpp"
#include "Tempus_SolutionHistory.hpp"
#include "Tempus_StepperHHTAlphaAppAction.hpp"

namespace Tempus {

template <class Scalar>
class StepperHHTAlphaModifierXBase
  : virtual public Tempus::StepperHHTAlphaAppAction<Scalar> {
 private:
  /* \brief Adaptor execute function
   *
   *  This is an adaptor function to bridge between the AppAction
   *  interface and the ModifierX interface.  It is meant to be private
   *  and non-virtual as deriving from this class should only need to
   *  implement the modify function.
   *
   *  For the ModifierX interface, this adaptor maps the
   *  StepperHHTAlphaAppAction::ACTION_LOCATION to the
   *  StepperHHTAlphaModifierX::MODIFIERX_TYPE, and only pass the solution
   *  (\f$x\f$ and/or \f$\dot{x}\f$ and other parameters to the modify
   *  function.
   */
  void execute(
      Teuchos::RCP<SolutionHistory<Scalar> > sh,
      Teuchos::RCP<StepperHHTAlpha<Scalar> > stepper,
      const typename StepperHHTAlphaAppAction<Scalar>::ACTION_LOCATION actLoc)
  {
    using Teuchos::RCP;

    MODIFIER_TYPE modType                    = X_BEGIN_STEP;
    RCP<SolutionState<Scalar> > workingState = sh->getWorkingState();
    const Scalar time                        = workingState->getTime();
    const Scalar dt                          = workingState->getTimeStep();
    RCP<Thyra::VectorBase<Scalar> > x;

    switch (actLoc) {
      case StepperHHTAlphaAppAction<Scalar>::BEGIN_STEP: {
        modType = X_BEGIN_STEP;
        x       = workingState->getX();
        break;
      }
      case StepperHHTAlphaAppAction<Scalar>::BEFORE_SOLVE: {
        modType = X_BEFORE_SOLVE;
        x       = workingState->getX();
        break;
      }
      case StepperHHTAlphaAppAction<Scalar>::AFTER_SOLVE: {
        modType = X_AFTER_SOLVE;
        x       = workingState->getX();
        break;
      }
      case StepperHHTAlphaAppAction<Scalar>::END_STEP: {
        modType = X_END_STEP;
        if (workingState->getX() != Teuchos::null)
          x = workingState->getX();
        else
          x = stepper->getStepperX();
        break;
      }
      default:
        TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error,
                                   "Error - unknown action location.\n");
    }

    this->modify(x, time, dt, modType);
  }

 public:
  enum MODIFIER_TYPE {
    X_BEGIN_STEP,    
    X_BEFORE_SOLVE,  
    X_AFTER_SOLVE,   
    X_END_STEP       
  };

  virtual void modify(Teuchos::RCP<Thyra::VectorBase<Scalar> > /* x */,
                      const Scalar /* time */, const Scalar /* dt */,
                      const MODIFIER_TYPE modType) = 0;
};

}  // namespace Tempus

#endif  // Tempus_StepperHHTAlphaModifierXBase_hpp