/* -*- C++ -*-

  * lemon/lp_skeleton.h - Part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2006 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  *

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * precise terms see the accompanying LICENSE file.

  *

  * This software is provided "AS IS" with no warranty of any kind,

  * express or implied, and with no claim as to its suitability for any

  * purpose.

  *

  */

 #ifndef LEMON_LP_SKELETON

 #define LEMON_LP_SKELETON

 #include <lemon/lp_base.h>

 ///\file

 ///\brief A skeleton file to implement LP solver interfaces

 namespace lemon {

   ///A skeleton class to implement LP solver interfaces

   class LpSkeleton :public LpSolverBase {

     int col_num,row_num;

   protected:

     ///\e

     virtual LpSolverBase &_newLp();

     ///\e

     virtual LpSolverBase &_copyLp();

     /// \e

     virtual int _addCol();

     /// \e

     virtual int _addRow();

     /// \e

     virtual void _eraseCol(int i);

     /// \e

     virtual void _eraseRow(int i);

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     ///

     virtual void _setRowCoeffs(int i, 

 			       int length,

                                int  const * indices, 

                                Value  const * values );

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     ///

     virtual void _setColCoeffs(int i, 

 			       int length,

                                int  const * indices, 

                                Value  const * values );

     /// Set one element of the coefficient matrix

     virtual void _setCoeff(int row, int col, Value value);

     /// The lower bound of a variable (column) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or -\ref INF.

     virtual void _setColLowerBound(int i, Value value);

     /// \e

     /// The upper bound of a variable (column) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or \ref INF.

     virtual void _setColUpperBound(int i, Value value);

     /// \e

 //     /// The lower bound of a linear expression (row) have to be given by an 

 //     /// extended number of type Value, i.e. a finite number of type 

 //     /// Value or -\ref INF.

 //     virtual void _setRowLowerBound(int i, Value value);

 //     /// \e

 //     /// The upper bound of a linear expression (row) have to be given by an 

 //     /// extended number of type Value, i.e. a finite number of type 

 //     /// Value or \ref INF.

 //     virtual void _setRowUpperBound(int i, Value value);

     /// The lower and upper bound of a linear expression (row) have to be 

     /// given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or +/-\ref INF.

     virtual void _setRowBounds(int i, Value lb, Value ub);

     /// \e

     /// \e

     virtual void _clearObj();

     /// \e

     virtual void _setObjCoeff(int i, Value obj_coef);

     ///\e

     ///\bug Wrong interface

     ///

     virtual SolveExitStatus _solve();

     ///\e

     ///\bug Wrong interface

     ///

     virtual Value _getPrimal(int i);

     ///\e

     ///\bug Wrong interface

     ///

     virtual Value _getDual(int i);

     ///\e

     ///\bug Wrong interface

     ///

     virtual Value _getPrimalValue();

     ///\e

     ///\bug Wrong interface

     ///

     virtual SolutionStatus _getPrimalStatus();

     ////e

     virtual SolutionStatus _getDualStatus();

     ///\e

     virtual ProblemTypes _getProblemType();

     ///\e

     virtual void _setMax();

     ///\e

     virtual void _setMin();

     ///\e

     virtual bool _isBasicCol(int i);

   public:

     LpSkeleton() : LpSolverBase(), col_num(0), row_num(0) {}

   };  

 } //namespace lemon

 #endif // LEMON_LP_SKELETON