Rythmos_SimpleStepControlStrategy_decl.hpp

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//                           Rythmos Package
//                 Copyright (2006) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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// This library is free software; you can redistribute it and/or modify
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#ifndef Rythmos_SIMPLE_STEP_CONTROL_STRATEGY_DECL_H
#define Rythmos_SIMPLE_STEP_CONTROL_STRATEGY_DECL_H

#include "Rythmos_StepControlStrategyBase.hpp"

namespace Rythmos {

// Step Control Strategy object for SimpleStepControlStrategy
//
// Order of calls:
// setRequestedStepSize()
// nextStepSize()
// optional:  nextStepOrder()
// setCorrection
// acceptStep
// completeStep or rejectStep
// repeat
//
template<class Scalar>
class SimpleStepControlStrategy
  : virtual public StepControlStrategyBase<Scalar>
{
  public:

    typedef typename Teuchos::ScalarTraits<Scalar>::magnitudeType ScalarMag;

    void setRequestedStepSize(const StepperBase<Scalar>& stepper,
      const Scalar& stepSize, const StepSizeType& stepSizeType);

    void nextStepSize(const StepperBase<Scalar>& stepper, Scalar* stepSize,
      StepSizeType* stepSizeType, int* order);

    void setCorrection(
         const StepperBase<Scalar>& stepper
        ,const RCP<const Thyra::VectorBase<Scalar> >& soln
        ,const RCP<const Thyra::VectorBase<Scalar> >& ee
        ,int solveStatus
        );

    bool acceptStep(const StepperBase<Scalar>& stepper, Scalar* LETValue);

    void completeStep(const StepperBase<Scalar>& stepper);

    AttemptedStepStatusFlag rejectStep(const StepperBase<Scalar>& stepper);

    StepControlStrategyState getCurrentState();

    int getMaxOrder() const;

    void setStepControlData(const StepperBase<Scalar>& stepper);

    bool supportsCloning() const;

    RCP<StepControlStrategyBase<Scalar> > cloneStepControlStrategyAlgorithm() const;


    SimpleStepControlStrategy();

    void describe(
      Teuchos::FancyOStream &out,
      const Teuchos::EVerbosityLevel verbLevel
      ) const;

    void setParameterList(RCP<Teuchos::ParameterList> const& paramList);

    RCP<Teuchos::ParameterList> getNonconstParameterList();

    RCP<Teuchos::ParameterList> unsetParameterList();

    RCP<const Teuchos::ParameterList> getValidParameters() const;


    void initialize(const StepperBase<Scalar>& stepper);


  private:

    // Private data members

    void defaultInitializeAllData_();

    StepControlStrategyState stepControlState_;

    RCP<Teuchos::ParameterList> parameterList_;

    Scalar initialStepSize_;
    Scalar requestedStepSize_;
    Scalar currentStepSize_;
    Scalar nextStepSize_;
    StepSizeType stepSizeType_;

    Scalar minStepSize_;
    Scalar maxStepSize_;
    Scalar stepSizeIncreaseFactor_;
    Scalar stepSizeDecreaseFactor_;
    int numStepFailures_;
    int maxStepFailures_;
    int maxOrder_;
    Scalar dxRelativeTolerance_;
    Scalar dxAbsoluteTolerance_;
    int solveStatus_;

    RCP<const Thyra::VectorBase<Scalar> > x_;
    RCP<const Thyra::VectorBase<Scalar> > dx_;


    static const std::string initialStepSizeName_;
    static const double initialStepSizeDefault_;

    static const std::string minStepSizeName_;
    static const double minStepSizeDefault_;

    static const std::string maxStepSizeName_;
    static const double maxStepSizeDefault_;

    static const std::string stepSizeIncreaseFactorName_;
    static const double stepSizeIncreaseFactorDefault_;

    static const std::string stepSizeDecreaseFactorName_;
    static const double stepSizeDecreaseFactorDefault_;

    static const std::string maxStepFailuresName_;
    static const int maxStepFailuresDefault_;

    static const std::string dxRelativeToleranceName_;
    static const double dxRelativeToleranceDefault_;

    static const std::string dxAbsoluteToleranceName_;
    static const double dxAbsoluteToleranceDefault_;


    // Private member functions

    void setStepControlState_(StepControlStrategyState state);

};

} // namespace Rythmos

#endif // Rythmos_SIMPLE_STEP_CONTROL_STRATEGY_DECL_H