/*-------------------------------------------------------------------------------------*/
/*  NOMAD - Nonsmooth Optimization by Mesh Adaptive Direct search - version 3.0.0      */
/*                                                                                     */
/*  Copyright (C) 2001-2008  Mark Abramson        - the Boeing Company, Seattle        */
/*                           Charles Audet        - Ecole Polytechnique, Montreal      */
/*                           Gilles Couture       - Ecole Polytechnique, Montreal      */
/*                           John Dennis          - Rice University, Houston           */
/*                           Sebastien Le Digabel - Ecole Polytechnique, Montreal      */
/*                                                                                     */
/*  funded in part by AFOSR and Exxon Mobil                                            */
/*                                                                                     */
/*  Author: Sebastien Le Digabel                                                       */
/*                                                                                     */
/*  Contact information:                                                               */
/*    Ecole Polytechnique de Montreal - GERAD                                          */
/*    C.P. 6079, Succ. Centre-ville, Montreal (Quebec) H3C 3A7 Canada                  */
/*    e-mail: Sebastien.Le.Digabel@gerad.ca                                            */
/*    phone : 1-514-340-6053 #6673                                                     */
/*    fax   : 1-514-340-5665                                                           */
/*                                                                                     */
/*  This program is free software: you can redistribute it and/or modify it under the  */
/*  terms of the GNU General Public License as published by the Free Software          */
/*  Foundation, either version 3 of the License, or (at your option) any later         */
/*  version.                                                                           */
/*                                                                                     */
/*  This program 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 General Public License for more details.          */
/*                                                                                     */
/*  You should have received a copy of the GNU General Public License along with this  */
/*  program. If not, see <http://www.gnu.org/licenses/>.                               */
/*                                                                                     */
/*  You can find information on the NOMAD software at www.gerad.ca/nomad               */
/*-------------------------------------------------------------------------------------*/
#ifndef __EVALUATOR___
#define __EVALUATOR__

#include "Eval_Point.hpp"

class Evaluator : private Uncopyable {

private:

  const Parameters         & _p;         // parameters

  std::ostream             & _out;       // internal displays


  std::vector<std::string>   _bb_exe;    // black-box exe names
                                         //  . not the same as Parameters::_bb_exe
                                         //  . Evaluator::_bb_exe is constructed from
                                         //    Parameters::_bb_exe

  std::vector<std::string>   _sgte_exe;  // surrogates executable names

  std::vector<int>           _bb_nbo;    // number of outputs for each black-box exe

  // check the constraints to decide if evaluations have to be stopped:
  bool interrupt_evaluations ( const Eval_Point    & x     ,
			       const NOMAD::Double & h_max   ) const;

  // process a black-box executable name:
  void process_bb_exe_name ( string & bb_exe ) const;

protected:

  // access to the parameters:
  const Parameters & get_p ( void ) const { return _p; }

public:

  // constructor:
  explicit Evaluator ( const Parameters & p , std::ostream & out );

  // destructor:
  virtual ~Evaluator ( void ) {}

  // this virtual method is called every time a new (full) success is made:
  virtual void update_success ( void ) {}

  // evaluate the black-boxes at a given Eval_Point:
  //   . can be user-defined
  //   . returns false if the evaluation failed
  //   . set count_eval=true in order to count the evaluation
  virtual bool eval_x ( Eval_Point          & x          ,
			const NOMAD::Double & h_max      ,
			bool                & count_eval   ) const;

  // compute f(x) from the black-box outputs of a point:
  // (define a Multi_Obj_Evaluator to treat more than one objective)
  virtual void compute_f ( Eval_Point & x ) const;

  // compute h(x) from the black-box outputs of a point:
  void compute_h ( Eval_Point & x ) const;

};

#endif
