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Location: LEMON/LEMON-official/lemon/lp_soplex.h

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deba@inf.elte.hu
Thorough redesign of the LP/MIP interface (#44) - Redesigned class structure - Redesigned iterators - Some functions in the basic interface redesigned - More complete setting functions - Ray retrieving functions - Lot of improvements - Cplex common env - CLP macro definition to config.h.in - Update lp.h to also use soplex and clp - Remove default_solver_name - New solverName() function in solvers - Handle exceptions for MipCplex test - Rename tolerance parameter to epsilon - Rename MapIt to CoeffIt - Lot of documentation improvements - Various bugfixes
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/* -*- 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_LP_SOPLEX_H

#define LEMON_LP_SOPLEX_H



///\file

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



#include <vector>

#include <string>



#include <lemon/lp_base.h>



// Forward declaration

namespace soplex {

  class SoPlex;

}



namespace lemon {



  /// \ingroup lp_group

  ///

  /// \brief Interface for the SOPLEX solver

  ///

  /// This class implements an interface for the SoPlex LP solver.

  /// The SoPlex library is an object oriented lp solver library

  /// developed at the Konrad-Zuse-Zentrum f�r Informationstechnik

  /// Berlin (ZIB). You can find detailed information about it at the

  /// <tt>http://soplex.zib.de</tt> address.

  class LpSoplex : public LpSolver {

  private:



    soplex::SoPlex* soplex;



    std::vector<std::string> _col_names;

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



    std::vector<std::string> _row_names;

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



  private:



    // these values cannot be retrieved element by element

    mutable std::vector<Value> _primal_values;

    mutable std::vector<Value> _dual_values;



    mutable std::vector<Value> _primal_ray;

    mutable std::vector<Value> _dual_ray;



    void _clear_temporals();



  public:



    /// \e

    LpSoplex();

    /// \e

    LpSoplex(const LpSoplex&);

    /// \e

    ~LpSoplex();



  protected:



    virtual LpSoplex* _newSolver() const;

    virtual LpSoplex* _cloneSolver() const;



    virtual const char* _solverName() const;



    virtual int _addCol();

    virtual int _addRow();



    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 b, ExprIterator e);

    virtual void _getObjCoeffs(InsertIterator b) 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();



  };



} //END OF NAMESPACE LEMON



#endif //LEMON_LP_SOPLEX_H