# CbcObject.hpp

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    00001 // $Id$
    00002 // Copyright (C) 2002, International Business Machines
    00003 // Corporation and others.  All Rights Reserved.
    00004 // This code is licensed under the terms of the Eclipse Public License (EPL).
    00005
    00006 // Edwin 11/12/2009 carved from CbcBranchBase
    00007
    00008 #ifndef CbcObject_H
    00009 #define CbcObject_H
    00010
    00011 #include <string>
    00012 #include <vector>
    00013 #include "OsiBranchingObject.hpp"
    00014 class OsiSolverInterface;
    00015 class OsiSolverBranch;
    00016
    00017 class CbcModel;
    00018 class CbcNode;
    00019 class CbcNodeInfo;
    00020 class CbcBranchingObject;
    00021 class OsiChooseVariable;
    00022 class CbcObjectUpdateData;
    00023 //#############################################################################
    00024
    00050 // This can be used if object wants to skip strong branching
    00051 typedef struct {
    00052     CbcBranchingObject * possibleBranch; // what a branch would do
    00053     double upMovement; // cost going up (and initial away from feasible)
    00054     double downMovement; // cost going down
    00055     int numIntInfeasUp ; // without odd ones
    00056     int numObjInfeasUp ; // just odd ones
    00057     bool finishedUp; // true if solver finished
    00058     int numItersUp ; // number of iterations in solver
    00059     int numIntInfeasDown ; // without odd ones
    00060     int numObjInfeasDown ; // just odd ones
    00061     bool finishedDown; // true if solver finished
    00062     int numItersDown; // number of iterations in solver
    00063     int objectNumber; // Which object it is
    00064     int fix; // 0 if no fix, 1 if we can fix up, -1 if we can fix down
    00065 } CbcStrongInfo;
    00066
    00067 class CbcObject : public OsiObject {
    00068
    00069 public:
    00070
    00071     // Default Constructor
    00072     CbcObject ();
    00073
    00074     // Useful constructor
    00075     CbcObject (CbcModel * model);
    00076
    00077     // Copy constructor
    00078     CbcObject ( const CbcObject &);
    00079
    00080     // Assignment operator
    00081     CbcObject & operator=( const CbcObject& rhs);
    00082
    00084     virtual CbcObject * clone() const = 0;
    00085
    00087     virtual ~CbcObject ();
    00088
    00103 #ifdef CBC_NEW_STYLE_BRANCH
    00104     virtual double infeasibility(const OsiBranchingInformation * info,
    00105                                  int &preferredWay) const = 0;
    00106 #else
    00107     virtual double infeasibility(const OsiBranchingInformation * /*info*/,
    00108                                  int &preferredWay) const {
    00109         return infeasibility(preferredWay);
    00110     }
    00111     virtual double infeasibility(int &/*preferredWay*/) const {
    00112         throw CoinError("Need code", "infeasibility", "CbcBranchBase");
    00113     }
    00114 #endif
    00115
    00119     virtual void feasibleRegion() = 0;
    00121     virtual double feasibleRegion(OsiSolverInterface * solver, const OsiBranchingInformation * info) const;
    00122
    00127     virtual double feasibleRegion(OsiSolverInterface * solver) const ;
    00128
    00134 #ifdef CBC_NEW_STYLE_BRANCH
    00135     virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface * solver, const OsiBranchingInformation * info, int way) = 0;
    00136 #else
    00137   virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface *
    00138                                                /* solver */,
    00139                                                const OsiBranchingInformation *
    00140                                                /* info */, int /* way */) {
    00141         // return createBranch(solver, info, way);
    00142       return NULL;
    00143     }
    00144     virtual OsiBranchingObject * createBranch(OsiSolverInterface * /*solver*/,
    00145             const OsiBranchingInformation * /*info*/, int /*way*/) const {
    00146         throw CoinError("Need code", "createBranch", "CbcBranchBase");
    00147     }
    00148 #endif
    00149
    00154     virtual OsiBranchingObject * createOsiBranch(OsiSolverInterface * solver, const OsiBranchingInformation * info, int way) const;
    00159     virtual OsiSolverBranch * solverBranch() const;
    00160
    00169     virtual CbcBranchingObject * preferredNewFeasible() const {
    00170         return NULL;
    00171     }
    00172
    00181     virtual CbcBranchingObject * notPreferredNewFeasible() const {
    00182         return NULL;
    00183     }
    00184
    00189     virtual void resetBounds(const OsiSolverInterface * ) {}
    00190
    00193     virtual void floorCeiling(double & floorValue, double & ceilingValue, double value,
    00194                               double tolerance) const;
    00195
    00199     virtual CbcObjectUpdateData createUpdateInformation(const OsiSolverInterface * solver,
    00200             const CbcNode * node,
    00201             const CbcBranchingObject * branchingObject);
    00202
    00204     virtual void updateInformation(const CbcObjectUpdateData & ) {}
    00205
    00207     inline int id() const {
    00208         return id_;
    00209     }
    00210
    00214     inline void setId(int value) {
    00215         id_ = value;
    00216     }
    00217
    00220     inline bool optionalObject() const {
    00221         return (id_ >= 1000000000 && id_ < 1100000000);
    00222     }
    00223
    00225     inline int position() const {
    00226         return position_;
    00227     }
    00228
    00230     inline void setPosition(int position) {
    00231         position_ = position;
    00232     }
    00233
    00235     inline void setModel(CbcModel * model) {
    00236         model_ = model;
    00237     }
    00238
    00240     inline CbcModel * model() const {
    00241         return  model_;
    00242     }
    00243
    00245     inline int preferredWay() const {
    00246         return preferredWay_;
    00247     }
    00249     inline void setPreferredWay(int value) {
    00250         preferredWay_ = value;
    00251     }
    00253     virtual void redoSequenceEtc(CbcModel * , int , const int * ) {}
    00254
    00255 protected:
    00257
    00259     CbcModel * model_;
    00261     int id_;
    00263     int position_;
    00265     int preferredWay_;
    00266
    00267 };
    00268
    00269 #endif
    00270

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