Rythmos_IntegratorBase.hpp

//@HEADER
// ***********************************************************************
//
//                     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.
//
// 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
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Todd S. Coffey (tscoffe@sandia.gov)
//
// ***********************************************************************
//@HEADER

#ifndef Rythmos_INTEGRATOR_BASE_H
#define Rythmos_INTEGRATOR_BASE_H

#include "Rythmos_InterpolationBufferBase.hpp"
#include "Rythmos_StepperBase.hpp"
#include "Teuchos_as.hpp"


namespace Rythmos {


namespace Exceptions {


class GetFwdPointsFailed : public ::Rythmos::Exceptions::ExceptionBase
{public: GetFwdPointsFailed(const std::string &what):ExceptionBase(what) {}};


} // namespace Exceptions


template<class Scalar> 
class IntegratorBase : virtual public InterpolationBufferBase<Scalar>
{
public:
  
  typedef typename Teuchos::ScalarTraits<Scalar>::magnitudeType ScalarMag;

  virtual RCP<IntegratorBase<Scalar> > cloneIntegrator() const
    { return Teuchos::null; }

  virtual void setTrailingInterpolationBuffer(
    const RCP<InterpolationBufferBase<Scalar> > &trailingInterpBuffer
    ) 
    { TEST_FOR_EXCEPT(true); }

  virtual bool acceptsTrailingInterpolationBuffer() const 
    { return false; }

  virtual void setStepper(
    const RCP<StepperBase<Scalar> > &stepper,
    const Scalar &finalTime,
    const bool landOnFinalTime = true
    ) =0;

  virtual Teuchos::RCP<const StepperBase<Scalar> > getStepper() const =0;

  virtual RCP<StepperBase<Scalar> > unSetStepper() =0;

  virtual void getFwdPoints(
    const Array<Scalar>& time_vec,
    Array<RCP<const Thyra::VectorBase<Scalar> > >* x_vec,
    Array<RCP<const Thyra::VectorBase<Scalar> > >* xdot_vec,
    Array<ScalarMag>* accuracy_vec
    ) =0;

  virtual TimeRange<Scalar> getFwdTimeRange() const =0;

};


// 2007/09/14: rabartl: ToDo: Move these functions into a file
// Rythmos_IntegratorBaseHelpers.hpp.


template<class Scalar> 
RCP<const Thyra::VectorBase<Scalar> >
get_fwd_x( IntegratorBase<Scalar>& integrator, const Scalar t )
{
  Array<Scalar> time_vec;
  time_vec.push_back(t);
  Array<RCP<const Thyra::VectorBase<Scalar> > > x_vec;
  integrator.getFwdPoints(time_vec,&x_vec,0,0);
  return x_vec[0];
}


template<class Scalar> 
void get_fwd_x_and_x_dot(
  IntegratorBase<Scalar>& integrator,
  const Scalar t,
  RCP<const Thyra::VectorBase<Scalar> > *x,
  RCP<const Thyra::VectorBase<Scalar> > *x_dot
  )
{
  Array<Scalar> time_vec;
  time_vec.push_back(t);
  Array<RCP<const Thyra::VectorBase<Scalar> > > x_vec;
  Array<RCP<const Thyra::VectorBase<Scalar> > > x_dot_vec;
  integrator.getFwdPoints(
    time_vec,
    x ? &x_vec : 0,
    x_dot ? &x_dot_vec : 0,
    0
    );
  if (x) *x = x_vec[0];
  if (x_dot) *x_dot = x_dot_vec[0];
}

 
} // namespace Rythmos


#endif // Rythmos_INTEGRATOR_BASE_H

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