alpar@461: /* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@461:  *
alpar@461:  * This file is a part of LEMON, a generic C++ optimization library.
alpar@461:  *
alpar@461:  * Copyright (C) 2003-2008
alpar@461:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@461:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@461:  *
alpar@461:  * Permission to use, modify and distribute this software is granted
alpar@461:  * provided that this copyright notice appears in all copies. For
alpar@461:  * precise terms see the accompanying LICENSE file.
alpar@461:  *
alpar@461:  * This software is provided "AS IS" with no warranty of any kind,
alpar@461:  * express or implied, and with no claim as to its suitability for any
alpar@461:  * purpose.
alpar@461:  *
alpar@461:  */
alpar@461: 
alpar@461: #ifndef LEMON_CPLEX_H
alpar@461: #define LEMON_CPLEX_H
alpar@461: 
alpar@461: ///\file
alpar@461: ///\brief Header of the LEMON-CPLEX lp solver interface.
alpar@461: 
alpar@461: #include <lemon/lp_base.h>
alpar@461: 
alpar@461: struct cpxenv;
alpar@461: struct cpxlp;
alpar@461: 
alpar@461: namespace lemon {
alpar@461: 
alpar@461:   /// \brief Reference counted wrapper around cpxenv pointer
alpar@461:   ///
alpar@461:   /// The cplex uses environment object which is responsible for
alpar@461:   /// checking the proper license usage. This class provides a simple
alpar@461:   /// interface for share the environment object between different
alpar@461:   /// problems.
alpar@461:   class CplexEnv {
alpar@461:     friend class CplexBase;
alpar@461:   private:
alpar@461:     cpxenv* _env;
alpar@461:     mutable int* _cnt;
alpar@461: 
alpar@461:   public:
alpar@461: 
alpar@461:     /// \brief This exception is thrown when the license check is not
alpar@461:     /// sufficient
alpar@461:     class LicenseError : public Exception {
alpar@461:       friend class CplexEnv;
alpar@461:     private:
alpar@461: 
alpar@461:       LicenseError(int status);
alpar@461:       char _message[510];
alpar@461: 
alpar@461:     public:
alpar@461: 
alpar@461:       /// The short error message
alpar@461:       virtual const char* what() const throw() {
alpar@461:         return _message;
alpar@461:       }
alpar@461:     };
alpar@461: 
alpar@461:     /// Constructor
alpar@461:     CplexEnv();
alpar@461:     /// Shallow copy constructor
alpar@461:     CplexEnv(const CplexEnv&);
alpar@461:     /// Shallow assignement
alpar@461:     CplexEnv& operator=(const CplexEnv&);
alpar@461:     /// Destructor
alpar@461:     virtual ~CplexEnv();
alpar@461: 
alpar@461:   protected:
alpar@461: 
alpar@461:     cpxenv* cplexEnv() { return _env; }
alpar@461:     const cpxenv* cplexEnv() const { return _env; }
alpar@461:   };
alpar@461: 
alpar@461:   /// \brief Base interface for the CPLEX LP and MIP solver
alpar@461:   ///
alpar@461:   /// This class implements the common interface of the CPLEX LP and
alpar@461:   /// MIP solvers.  
alpar@461:   /// \ingroup lp_group
alpar@461:   class CplexBase : virtual public LpBase {
alpar@461:   protected:
alpar@461: 
alpar@461:     CplexEnv _env;
alpar@461:     cpxlp* _prob;
alpar@461: 
alpar@461:     CplexBase();
alpar@461:     CplexBase(const CplexEnv&);
alpar@461:     CplexBase(const CplexBase &);
alpar@461:     virtual ~CplexBase();
alpar@461: 
alpar@461:     virtual int _addCol();
alpar@461:     virtual int _addRow();
alpar@461: 
alpar@461:     virtual void _eraseCol(int i);
alpar@461:     virtual void _eraseRow(int i);
alpar@461: 
alpar@461:     virtual void _eraseColId(int i);
alpar@461:     virtual void _eraseRowId(int i);
alpar@461: 
alpar@461:     virtual void _getColName(int col, std::string& name) const;
alpar@461:     virtual void _setColName(int col, const std::string& name);
alpar@461:     virtual int _colByName(const std::string& name) const;
alpar@461: 
alpar@461:     virtual void _getRowName(int row, std::string& name) const;
alpar@461:     virtual void _setRowName(int row, const std::string& name);
alpar@461:     virtual int _rowByName(const std::string& name) const;
alpar@461: 
alpar@461:     virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
alpar@461:     virtual void _getRowCoeffs(int i, InsertIterator b) const;
alpar@461: 
alpar@461:     virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
alpar@461:     virtual void _getColCoeffs(int i, InsertIterator b) const;
alpar@461: 
alpar@461:     virtual void _setCoeff(int row, int col, Value value);
alpar@461:     virtual Value _getCoeff(int row, int col) const;
alpar@461: 
alpar@461:     virtual void _setColLowerBound(int i, Value value);
alpar@461:     virtual Value _getColLowerBound(int i) const;
alpar@461: 
alpar@461:     virtual void _setColUpperBound(int i, Value value);
alpar@461:     virtual Value _getColUpperBound(int i) const;
alpar@461: 
alpar@461:   private:
alpar@461:     void _set_row_bounds(int i, Value lb, Value ub);
alpar@461:   protected:
alpar@461: 
alpar@461:     virtual void _setRowLowerBound(int i, Value value);
alpar@461:     virtual Value _getRowLowerBound(int i) const;
alpar@461: 
alpar@461:     virtual void _setRowUpperBound(int i, Value value);
alpar@461:     virtual Value _getRowUpperBound(int i) const;
alpar@461: 
alpar@461:     virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
alpar@461:     virtual void _getObjCoeffs(InsertIterator b) const;
alpar@461: 
alpar@461:     virtual void _setObjCoeff(int i, Value obj_coef);
alpar@461:     virtual Value _getObjCoeff(int i) const;
alpar@461: 
alpar@461:     virtual void _setSense(Sense sense);
alpar@461:     virtual Sense _getSense() const;
alpar@461: 
alpar@461:     virtual void _clear();
alpar@461: 
alpar@461:   public:
alpar@461: 
alpar@461:     /// Returns the used \c CplexEnv instance
alpar@461:     const CplexEnv& env() const { return _env; }
alpar@461:     ///
alpar@461:     const cpxenv* cplexEnv() const { return _env.cplexEnv(); }
alpar@461: 
alpar@461:     cpxlp* cplexLp() { return _prob; }
alpar@461:     const cpxlp* cplexLp() const { return _prob; }
alpar@461: 
alpar@461:   };
alpar@461: 
alpar@461:   /// \brief Interface for the CPLEX LP solver
alpar@461:   ///
alpar@461:   /// This class implements an interface for the CPLEX LP solver.
alpar@461:   ///\ingroup lp_group
alpar@528:   class CplexLp : public LpSolver, public CplexBase {
alpar@461:   public:
alpar@461:     /// \e
alpar@462:     CplexLp();
alpar@461:     /// \e
alpar@462:     CplexLp(const CplexEnv&);
alpar@461:     /// \e
alpar@462:     CplexLp(const CplexLp&);
alpar@461:     /// \e
alpar@462:     virtual ~CplexLp();
alpar@461: 
alpar@528:     /// \e
alpar@528:     virtual CplexLp* cloneSolver() const;
alpar@528:     /// \e
alpar@528:     virtual CplexLp* newSolver() const;
alpar@528: 
alpar@461:   private:
alpar@461: 
alpar@461:     // these values cannot retrieved element by element
alpar@461:     mutable std::vector<int> _col_status;
alpar@461:     mutable std::vector<int> _row_status;
alpar@461: 
alpar@461:     mutable std::vector<Value> _primal_ray;
alpar@461:     mutable std::vector<Value> _dual_ray;
alpar@461: 
alpar@461:     void _clear_temporals();
alpar@461: 
alpar@461:     SolveExitStatus convertStatus(int status);
alpar@461: 
alpar@461:   protected:
alpar@461: 
alpar@461:     virtual const char* _solverName() const;
alpar@461: 
alpar@461:     virtual SolveExitStatus _solve();
alpar@461:     virtual Value _getPrimal(int i) const;
alpar@461:     virtual Value _getDual(int i) const;
alpar@461:     virtual Value _getPrimalValue() const;
alpar@461: 
alpar@461:     virtual VarStatus _getColStatus(int i) const;
alpar@461:     virtual VarStatus _getRowStatus(int i) const;
alpar@461: 
alpar@461:     virtual Value _getPrimalRay(int i) const;
alpar@461:     virtual Value _getDualRay(int i) const;
alpar@461: 
alpar@461:     virtual ProblemType _getPrimalType() const;
alpar@461:     virtual ProblemType _getDualType() const;
alpar@461: 
alpar@461:   public:
alpar@461: 
alpar@461:     /// Solve with primal simplex method
alpar@461:     SolveExitStatus solvePrimal();
alpar@461: 
alpar@461:     /// Solve with dual simplex method
alpar@461:     SolveExitStatus solveDual();
alpar@461: 
alpar@461:     /// Solve with barrier method
alpar@461:     SolveExitStatus solveBarrier();
alpar@461: 
alpar@461:   };
alpar@461: 
alpar@461:   /// \brief Interface for the CPLEX MIP solver
alpar@461:   ///
alpar@461:   /// This class implements an interface for the CPLEX MIP solver.
alpar@461:   ///\ingroup lp_group
alpar@528:   class CplexMip : public MipSolver, public CplexBase {
alpar@461:   public:
alpar@461:     /// \e
alpar@462:     CplexMip();
alpar@461:     /// \e
alpar@462:     CplexMip(const CplexEnv&);
alpar@461:     /// \e
alpar@462:     CplexMip(const CplexMip&);
alpar@461:     /// \e
alpar@462:     virtual ~CplexMip();
alpar@461: 
alpar@461:   protected:
alpar@461: 
alpar@462:     virtual CplexMip* _cloneSolver() const;
alpar@462:     virtual CplexMip* _newSolver() const;
alpar@461: 
alpar@461:     virtual const char* _solverName() const;
alpar@461: 
alpar@461:     virtual ColTypes _getColType(int col) const;
alpar@461:     virtual void _setColType(int col, ColTypes col_type);
alpar@461: 
alpar@461:     virtual SolveExitStatus _solve();
alpar@461:     virtual ProblemType _getType() const;
alpar@461:     virtual Value _getSol(int i) const;
alpar@461:     virtual Value _getSolValue() const;
alpar@461: 
alpar@461:   };
alpar@461: 
alpar@461: } //END OF NAMESPACE LEMON
alpar@461: 
alpar@461: #endif //LEMON_CPLEX_H
alpar@461: