Tempus_StepperLeapfrogModifierXBase.hpp

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// @HEADER
// ****************************************************************************
//                Tempus: Copyright (2017) Sandia Corporation
//
// Distributed under BSD 3-clause license (See accompanying file Copyright.txt)
// ****************************************************************************
// @HEADER
 
#ifndef Tempus_StepperLeapfrogModifierXBase_hpp
#define Tempus_StepperLeapfrogModifierXBase_hpp
 
#include "Tempus_config.hpp"
#include "Tempus_SolutionHistory.hpp"
#include "Tempus_StepperLeapfrogAppAction.hpp"
 
 
namespace Tempus {

 
template<class Scalar>
class StepperLeapfrogModifierXBase
  : virtual public Tempus::StepperLeapfrogAppAction<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
   *  StepperLeapfrogAppAction::ACTION_LOCATION to the
   *  StepperLeapfrogModifierX::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<StepperLeapfrog<Scalar> > stepper,
    const typename StepperLeapfrogAppAction<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 StepperLeapfrogAppAction<Scalar>::BEGIN_STEP:
      {
        modType = X_BEGIN_STEP;
        x = workingState->getX();
        break;
      }
      case StepperLeapfrogAppAction<Scalar>::BEFORE_X_UPDATE:
      {
        modType = X_BEFORE_X_UPDATE;
        x = workingState->getX();
        break;
      }
      case StepperLeapfrogAppAction<Scalar>::BEFORE_EXPLICIT_EVAL:
      {
        modType = X_BEFORE_EXPLICIT_EVAL;
        x = workingState->getX();
        break;
      }
      case StepperLeapfrogAppAction<Scalar>::BEFORE_XDOT_UPDATE:
      {
        modType = X_BEFORE_XDOT_UPDATE;
        x = workingState->getX();
        break;
      }
      case StepperLeapfrogAppAction<Scalar>::END_STEP:
      {
        modType = X_END_STEP;
        x = workingState->getX();
        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_X_UPDATE,      
    X_BEFORE_EXPLICIT_EVAL, 
    X_BEFORE_XDOT_UPDATE,   
    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_StepperLeapfrogModifierXBase_hpp