CbcBranchDynamic.hpp

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/* $Id$ */
// Copyright (C) 2005, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).
 
#ifndef CbcBranchDynamic_H
#define CbcBranchDynamic_H
 
#include "CoinPackedMatrix.hpp"
#include "CbcSimpleIntegerDynamicPseudoCost.hpp"
#include "CbcBranchActual.hpp"

 
class CbcBranchDynamicDecision : public CbcBranchDecision {
public:
  // Default Constructor
  CbcBranchDynamicDecision();
 
  // Copy constructor
  CbcBranchDynamicDecision(const CbcBranchDynamicDecision &);
 
  virtual ~CbcBranchDynamicDecision();

  virtual CbcBranchDecision *clone() const;

  virtual void initialize(CbcModel *model);

  virtual int betterBranch(CbcBranchingObject *thisOne,
    CbcBranchingObject *bestSoFar,
    double changeUp, int numInfUp,
    double changeDn, int numInfDn);
  virtual void setBestCriterion(double value);
  virtual double getBestCriterion() const;
  virtual int whichMethod()
  {
    return 3;
  }

  virtual void saveBranchingObject(OsiBranchingObject *object);
  virtual void updateInformation(OsiSolverInterface *solver,
    const CbcNode *node);
 
private:
  CbcBranchDynamicDecision &operator=(const CbcBranchDynamicDecision &rhs);


  double bestCriterion_;

  double bestChangeUp_;

  int bestNumberUp_;

  double bestChangeDown_;

  int bestNumberDown_;

  CbcBranchingObject *bestObject_;
};

 
class CbcDynamicPseudoCostBranchingObject : public CbcIntegerBranchingObject {
 
public:
  CbcDynamicPseudoCostBranchingObject();

  CbcDynamicPseudoCostBranchingObject(CbcModel *model, int variable,
    int way, double value,
    CbcSimpleIntegerDynamicPseudoCost *object);

 
  CbcDynamicPseudoCostBranchingObject(CbcModel *model, int variable, int way,
    double lowerValue, double upperValue);

  CbcDynamicPseudoCostBranchingObject(const CbcDynamicPseudoCostBranchingObject &);

  CbcDynamicPseudoCostBranchingObject &operator=(const CbcDynamicPseudoCostBranchingObject &rhs);

  virtual CbcBranchingObject *clone() const;

  virtual ~CbcDynamicPseudoCostBranchingObject();

  void fillPart(int variable,
    int way, double value,
    CbcSimpleIntegerDynamicPseudoCost *object);
 
  using CbcBranchingObject::branch;
  virtual double branch();

  virtual int fillStrongInfo(CbcStrongInfo &info);

  inline double changeInGuessed() const
  {
    return changeInGuessed_;
  }

  inline void setChangeInGuessed(double value)
  {
    changeInGuessed_ = value;
  }

  inline CbcSimpleIntegerDynamicPseudoCost *object() const
  {
    return object_;
  }

  inline void setObject(CbcSimpleIntegerDynamicPseudoCost *object)
  {
    object_ = object;
  }

  virtual CbcBranchObjType type() const
  {
    return DynamicPseudoCostBranchObj;
  }
 
  // LL: compareOriginalObject and compareBranchingObject are inherited from
  // CbcIntegerBranchingObject thus need not be declared/defined here. After
  // all, this kind of branching object is simply using pseudocosts to make
  // decisions, but once the decisions are made they are the same kind as in
  // the underlying class.
 
protected:
  double changeInGuessed_;
  CbcSimpleIntegerDynamicPseudoCost *object_;
};
 
#endif
 
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