GlobiPack_Brents1DMinimization_decl.hpp

/*
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// 
//    GlobiPack: Collection of Scalar 1D globalizaton utilities
//                 Copyright (2009) 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
// it under the terms of the GNU Lesser General Public License as
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// This library is distributed in the hope that it will be useful, but
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#ifndef GLOBIPACK_BRENTS_1D_MINIMIZATION_DECL_HPP
#define GLOBIPACK_BRENTS_1D_MINIMIZATION_DECL_HPP


#include "GlobiPack_MeritFunc1DBase.hpp"
#include "Teuchos_Describable.hpp"
#include "Teuchos_VerboseObject.hpp"
#include "Teuchos_ParameterListAcceptorDefaultBase.hpp"


namespace GlobiPack {


template<typename Scalar>
class Brents1DMinimization
  : public Teuchos::Describable,
    public Teuchos::VerboseObject<Brents1DMinimization<Scalar> >,
    public Teuchos::ParameterListAcceptorDefaultBase
{
public:


  Brents1DMinimization();



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



  bool approxMinimize(
    const MeritFunc1DBase<Scalar> &phi,
    const PointEval1D<Scalar> &pointLower,
    const Ptr<PointEval1D<Scalar> > &pointMiddle,
    const PointEval1D<Scalar> &pointUpper,
    const Ptr<int> &numIters = Teuchos::null
    ) const;


private:

  // //////////////////////
  // Private data members

  Scalar rel_tol_;
  Scalar bracket_tol_;
  int max_iters_;

};


template<typename Scalar>
inline
const RCP<Brents1DMinimization<Scalar> > brents1DMinimization()
{
  return Teuchos::rcp(new Brents1DMinimization<Scalar>());
}


// Default values are exposed here for unit testing purposes


namespace Brents1DMinimizationUtils {


const std::string rel_tol_name = "Relative Tol";
const double rel_tol_default = 1.0e-5;

const std::string bracket_tol_name = "Bracket Tol";
const double bracket_tol_default = 1.0e-5;

const std::string max_iters_name = "Max Iterations";
const int max_iters_default = 10;


} // namespace Brents1DMinimizationUtils



} // namespace GlobiPack


#endif // GLOBIPACK_BRENTS_1D_MINIMIZATION_DECL_HPP