/* -*- mode: C++; indent-tabs-mode: nil; -*-

  *

  * This file is a part of LEMON, a generic C++ optimization library.

  *

  * Copyright (C) 2003-2008

  * 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_CLP_H

 #define LEMON_CLP_H

 ///\file

 ///\brief Header of the LEMON-CLP lp solver interface.

 #include <vector>

 #include <string>

 #include <lemon/lp_base.h>

 class ClpSimplex;

 namespace lemon {

   /// \ingroup lp_group

   ///

   /// \brief Interface for the CLP solver

   ///

   /// This class implements an interface for the Clp LP solver.  The

   /// Clp library is an object oriented lp solver library developed at

   /// the IBM. The CLP is part of the COIN-OR package and it can be

   /// used with Common Public License.

   class ClpLp : public LpSolver {

   protected:

     ClpSimplex* _prob;

     std::map<std::string, int> _col_names_ref;

     std::map<std::string, int> _row_names_ref;

   public:

     /// \e

     ClpLp();

     /// \e

     ClpLp(const ClpLp&);

     /// \e

     ~ClpLp();

     /// \e

     virtual ClpLp* newSolver() const;

     /// \e

     virtual ClpLp* cloneSolver() const;

   protected:

     mutable double* _primal_ray;

     mutable double* _dual_ray;

     void _init_temporals();

     void _clear_temporals();

   protected:

     virtual const char* _solverName() const;

     virtual int _addCol();

     virtual int _addRow();

     virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u);

     virtual void _eraseCol(int i);

     virtual void _eraseRow(int i);

     virtual void _eraseColId(int i);

     virtual void _eraseRowId(int i);

     virtual void _getColName(int col, std::string& name) const;

     virtual void _setColName(int col, const std::string& name);

     virtual int _colByName(const std::string& name) const;

     virtual void _getRowName(int row, std::string& name) const;

     virtual void _setRowName(int row, const std::string& name);

     virtual int _rowByName(const std::string& name) const;

     virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);

     virtual void _getRowCoeffs(int i, InsertIterator b) const;

     virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);

     virtual void _getColCoeffs(int i, InsertIterator b) const;

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

     virtual Value _getCoeff(int row, int col) const;

     virtual void _setColLowerBound(int i, Value value);

     virtual Value _getColLowerBound(int i) const;

     virtual void _setColUpperBound(int i, Value value);

     virtual Value _getColUpperBound(int i) const;

     virtual void _setRowLowerBound(int i, Value value);

     virtual Value _getRowLowerBound(int i) const;

     virtual void _setRowUpperBound(int i, Value value);

     virtual Value _getRowUpperBound(int i) const;

     virtual void _setObjCoeffs(ExprIterator, ExprIterator);

     virtual void _getObjCoeffs(InsertIterator) const;

     virtual void _setObjCoeff(int i, Value obj_coef);

     virtual Value _getObjCoeff(int i) const;

     virtual void _setSense(Sense sense);

     virtual Sense _getSense() const;

     virtual SolveExitStatus _solve();

     virtual Value _getPrimal(int i) const;

     virtual Value _getDual(int i) const;

     virtual Value _getPrimalValue() const;

     virtual Value _getPrimalRay(int i) const;

     virtual Value _getDualRay(int i) const;

     virtual VarStatus _getColStatus(int i) const;

     virtual VarStatus _getRowStatus(int i) const;

     virtual ProblemType _getPrimalType() const;

     virtual ProblemType _getDualType() const;

     virtual void _clear();

     virtual void _messageLevel(MessageLevel);

   public:

     ///Solves LP with primal simplex method.

     SolveExitStatus solvePrimal();

     ///Solves LP with dual simplex method.

     SolveExitStatus solveDual();

     ///Solves LP with barrier method.

     SolveExitStatus solveBarrier();

     ///Returns the constraint identifier understood by CLP.

     int clpRow(Row r) const { return rows(id(r)); }

     ///Returns the variable identifier understood by CLP.

     int clpCol(Col c) const { return cols(id(c)); }

   };

 } //END OF NAMESPACE LEMON

 #endif //LEMON_CLP_H