BonNWayChoose.hpp

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// Copyright (C) 2006, 2008 International Business Machines
// Corporation and others.  All Rights Reserved.
#ifndef BonNWayChoose_H
#define BonNWayChoose_H

#include "OsiChooseVariable.hpp"
#include "BonBabSetupBase.hpp"
#include "BonNWayObject.hpp"

#define OLD_USEFULLNESS

namespace Bonmin
{

  class BonNWayChoose : public OsiChooseVariable
  {
  protected:

  public:

    BonNWayChoose (BabSetupBase& b, const OsiSolverInterface* solver);

    BonNWayChoose (const BonNWayChoose &);

    BonNWayChoose & operator= (const BonNWayChoose& rhs);

    virtual OsiChooseVariable * clone() const;

    virtual ~BonNWayChoose ();

    double compute_usefulness(int objectIndex, const OsiBranchingInformation * info) const;

    double compute_usefulness(const OsiBranchingInformation * info,
                size_t n, const int * vars, const std::vector<double> &bounds, const std::vector<double> &unit_changes) const;
    virtual int setupList ( OsiBranchingInformation *info, bool initialize);

    virtual int chooseVariable( OsiSolverInterface * solver, OsiBranchingInformation *info, bool fixVariables);

  virtual int doStrongBranching( OsiSolverInterface * solver, 
                                 OsiBranchingInformation *info,
                                 int iObject, double * saveLow, double * saveUp, double &score);

 
  static void registerOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions);

  private:
    BonNWayChoose ();

    int br_depth_;
    Ipopt::Index do_fixings_;
    double cutoff_multiplier_;
    double pseudocost_trust_value_;
    double time_limit_;

    double start_time_;

    int start_nway_;

    int log_;
    typedef std::vector< std::vector<double> > full_mat;

    full_mat bounds_;

    full_mat unit_changes_;

    std::vector < std::vector<int> > num_ps_costs_;

    std::vector<int> num_eval_;

    int geo_means_;
  };

}
#endif