CbcHeuristicDivePseudoCost.hpp

/* $Id$ */
// Copyright (C) 2008, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#ifndef CbcHeuristicDivePseudoCost_H
#define CbcHeuristicDivePseudoCost_H

#include "CbcHeuristicDive.hpp"

/** DivePseudoCost class
 */

class CbcHeuristicDivePseudoCost : public CbcHeuristicDive {
public:
  // Default Constructor
  CbcHeuristicDivePseudoCost();

  // Constructor with model - assumed before cuts
  CbcHeuristicDivePseudoCost(CbcModel &model);

  // Copy constructor
  CbcHeuristicDivePseudoCost(const CbcHeuristicDivePseudoCost &);

  // Destructor
  ~CbcHeuristicDivePseudoCost();

  /// Clone
  virtual CbcHeuristicDivePseudoCost *clone() const;

  /// Assignment operator
  CbcHeuristicDivePseudoCost &operator=(const CbcHeuristicDivePseudoCost &rhs);

  /// Create C++ lines to get to current state
  virtual void generateCpp(FILE *fp);

  /// Selects the next variable to branch on
  /** Returns true if all the fractional variables can be trivially
        rounded. Returns false, if there is at least one fractional variable
        that is not trivially roundable. In this case, the bestColumn
        returned will not be trivially roundable.
    */
  virtual bool selectVariableToBranch(OsiSolverInterface *solver,
    const double *newSolution,
    int &bestColumn,
    int &bestRound);
  /** Initializes any data which is going to be used repeatedly
        in selectVariableToBranch */
  virtual void initializeData();
  /// Fix other variables at bounds
  virtual int fixOtherVariables(OsiSolverInterface *solver,
    const double *solution,
    PseudoReducedCost *candidate,
    const double *random);
};

#endif

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