/*-------------------------------------------------------------------------------------*/
/*  NOMAD - Nonlinear Optimization by Mesh Adaptive Direct search - version 3.7.3      */
/*                                                                                     */
/*                                                                                     */
/*  NOMAD - version 3.7.3 has been created by                                          */
/*                 Charles Audet        - Ecole Polytechnique de Montreal              */
/*                 Sebastien Le Digabel - Ecole Polytechnique de Montreal              */
/*                 Christophe Tribes    - Ecole Polytechnique de Montreal              */
/*                                                                                     */
/*  The copyright of NOMAD - version 3.7.3 is owned by                                 */
/*                 Sebastien Le Digabel - Ecole Polytechnique de Montreal              */
/*                 Christophe Tribes    - Ecole Polytechnique de Montreal              */
/*                                                                                     */
/*  NOMAD v3 has been funded by AFOSR and Exxon Mobil.                                 */
/*                                                                                     */
/*  NOMAD v3 is a new version of Nomad v1 and v2. Nomad v1 and v2 were created and     */
/*  developed by Mark A. Abramson from The Boeing Company, Charles Audet and           */
/*  Gilles Couture from Ecole Polytechnique de Montreal, and John E. Dennis Jr. from   */
/*  Rice University, and were funded by AFOSR and Exxon Mobil.                         */
/*                                                                                     */
/*                                                                                     */
/*  Contact information:                                                               */
/*    Ecole Polytechnique de Montreal - GERAD                                          */
/*    C.P. 6079, Succ. Centre-ville, Montreal (Quebec) H3C 3A7 Canada                  */
/*    e-mail: nomad@gerad.ca                                                           */
/*    phone : 1-514-340-6053 #6928                                                     */
/*    fax   : 1-514-340-5665                                                           */
/*                                                                                     */
/*  This program 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 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 Lesser General Public License for more details.   */
/*                                                                                     */
/*  You should have received a copy of the GNU Lesser 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               */
/*-------------------------------------------------------------------------------------*/
/**
 \file   Direction.hpp
 \brief  Polling direction (headers)
 \author Sebastien Le Digabel
 \date   2010-04-05
 \see    Direction.cpp
 */
#ifndef __DIRECTION__
#define __DIRECTION__

#include "Point.hpp"

namespace NOMAD {
    
    
    
    /// Class describing a polling direction.
    class Direction : public NOMAD::Point {
        
    private:
        
#ifdef MEMORY_DEBUG
        static int _cardinality;       ///< Number of NOMAD::Direction objects in memory.
        static int _max_cardinality;   ///< Max number of NOMAD::Direction objects in memory.
#endif
        
        NOMAD::direction_type _type;   ///< Type of direction.
        mutable int           _index;  ///< Direction index (used only for display).
        int                   _dir_group_index ; ///< Index a the group of direction
        
    public:
        
#ifdef MEMORY_DEBUG
        /// Access to the number of NOMAD::Direction objects in memory.
        /**
         \return The number of NOMAD::Direction objects in memory.
         */
        static int get_cardinality ( void ) { return Direction::_cardinality; }
        
        /// Access to the max number of NOMAD::Direction objects in memory.
        /**
         \return The max number of NOMAD::Direction objects in memory.
         */
        static int get_max_cardinality ( void ) { return Direction::_max_cardinality; }
#endif
        
        /// Constructor #1.
        Direction ( void );
        
        /// Constructor #2.
        /**
         \param n Dimension                         -- \b IN.
         \param v Initial value for all coordinates -- \b IN.
         \param type Type of direction              -- \b IN.
         \param dir_group_index Index of the variable group the direction belongs   --\b IN.
         */
        Direction ( int n ,
                   const NOMAD::Double & v ,
                   NOMAD::direction_type type,
                   int dir_group_index );
        
        /// Constructor #2b.
        /**
         \param n Dimension                         -- \b IN.
         \param v Initial value for all coordinates -- \b IN.
         \param type Type of direction              -- \b IN.
         */
        Direction ( int n ,
                   const NOMAD::Double & v ,
                   NOMAD::direction_type type);
        
        
        /// Constructor #3.
        /**
         \param x    Coordinates       -- \b IN.
         \param type Type of direction -- \b IN.
         */
        Direction ( const NOMAD::Point & x , NOMAD::direction_type type );
        
        /// Copy constructor.
        /**
         \param d The copied object.
         */
        Direction ( const Direction & d );
        
        /// Destructor.
        virtual ~Direction ( void );
        
        /// Affectation operator.
        /**
         \param d The right-hand side object -- \b IN.
         \return \c *this as the result of the affectation.
         */
        Direction & operator = ( const Direction & d );
        
        
        /// Check if the direction is defined.
        /**
         \return A boolean equal to \c true if the direction has no defined type.
         */
        virtual bool is_defined ( void ) const
        { return _type != NOMAD::UNDEFINED_DIRECTION; }
        
        /// Clear the direction.
        virtual void clear ( void );
        
        /// Size of the direction in memory.
        /**
         \return An integer for the size of the direction in bytes.
         */    virtual int size_of ( void ) const
        {
            return NOMAD::Point::size_of() + sizeof(_type) + sizeof(_index);
        }
        
        /// Negation.
        /**
         The current object \c *this is not modified.
         \return A new direction equal to \c -*this.
         */
        const Direction operator - ( void ) const;
        
        /*---------------*/
        /*  GET methods  */
        /*---------------*/
        
        /// Access to the type of direction.
        /**
         \return The type of the direction.
         */
        NOMAD::direction_type get_type  ( void ) const { return _type; }
        
        /// Access to the direction index.
        /**
         \return The direction index.
         */
        int get_index ( void ) const { return _index; }
        
        /// Access to the direction group index.
        /**
         \return The direction group index.
         */
        int get_dir_group_index ( void ) const { return _dir_group_index; }
        
        
        /// Check if the direction is a MADS direction.
        /**
         \return A boolean equal to \c true if the direction is a MADS direction.
         */
        bool is_mads ( void ) const { return NOMAD::dir_is_mads ( _type ); }
        
        /// Check if the direction is a GPS direction.
        /**
         \return A boolean equal to \c true if the direction is a GPS direction.
         */
        bool is_gps ( void ) const { return NOMAD::dir_is_gps  ( _type ); }
        
        /*---------------*/
        /*  SET methods  */
        /*---------------*/
        
        /// Set the direction index.
        /**
         \param i The direction index -- \b IN.
         */
        void set_index ( int i ) const { _index = i; }
        
        /// Set the direction type.
        /**
         \param t The direction type -- \b IN.
         */
        void set_type ( NOMAD::direction_type t ) { _type  = t; }
        
        /// Display.
        /**
         \param out The NOMAD::Display object -- \b IN.
         \param sep A string that is used as a separator between the coordinates
         -- \b IN.
         \param w   An integer indicating a width for the display of
         each coordinate -- \b IN.
         \param lim Max number of coordinates to display -- \b IN.
         */
        virtual void display ( const NOMAD::Display & out ,
                              const std::string    & sep ,
                              int                    w   ,
                              int                    lim   ) const;
    };
    
    /// Display a NOMAD::Direction object.
    /**
     \param out The NOMAD::Display object -- \b IN.
     \param d   The NOMAD::Direction object to be displayed -- \b IN.
     \return    The NOMAD::Display object.
     */
    inline const NOMAD::Display & operator << ( const NOMAD::Display   & out ,
                                               const NOMAD::Direction & d     )
    {
        d.display ( out , " " , 2 , NOMAD::Point::get_display_limit() );
        return out;
    }
}

#endif
