ConstrainedOptPack_DirectLineSearch_Strategy.hpp

Go to the documentation of this file.

// @HEADER
// ***********************************************************************
// 
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) 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.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
// 
// ***********************************************************************
// @HEADER

#ifndef DIRECT_LINE_SEARCH_STRATEGY_H
#define DIRECT_LINE_SEARCH_STRATEGY_H

#include <stdexcept>
#include <iosfwd>

#include "ConstrainedOptPack_Types.hpp"

namespace ConstrainedOptPack {

class DirectLineSearch_Strategy {
public:


  class NotDescentDirection : public std::logic_error
  {public: NotDescentDirection(const std::string& what_arg) : std::logic_error(what_arg) {}};


  virtual ~DirectLineSearch_Strategy() {}

  virtual void set_max_iter(int max_iter) = 0;

  virtual int max_iter() const = 0;

  virtual int num_iterations() const = 0;

  virtual bool do_line_search(
    const MeritFuncCalc1D   &phi
    ,value_type             phi_k
    ,value_type             *alpha_k
    ,value_type             *phi_kp1
    ,std::ostream           *out      = 0
    ) = 0;

  virtual void print_algorithm(std::ostream& out, const std::string& leading_str) const
  {}

};  // end class DirectLineSearch_Strategy

} // end namespace ConstrainedOptPack

#endif  // DIRECT_LINE_SEARCH_STRATEGY_H