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# /home/coin/svn-release/Blis-0.93.2/Bcps/src/BcpsBranchObject.h

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    00001 /*===========================================================================*
    00002  * This file is part of the Branch, Constrain and Price Software (BiCePS)    *
    00003  *                                                                           *
    00004  * BiCePS is distributed under the Eclipse Public License as part of the     *
    00005  * COIN-OR repository (http://www.coin-or.org).                              *
    00006  *                                                                           *
    00007  * Authors:                                                                  *
    00008  *                                                                           *
    00009  *          Yan Xu, Lehigh University                                        *
    00010  *          Ted Ralphs, Lehigh University                                    *
    00011  *                                                                           *
    00012  * Conceptual Design:                                                        *
    00013  *                                                                           *
    00014  *          Yan Xu, Lehigh University                                        *
    00015  *          Ted Ralphs, Lehigh University                                    *
    00016  *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
    00017  *          Matthew Saltzman, Clemson University                             *
    00018  *                                                                           *
    00019  * Copyright (C) 2001-2011, Lehigh University, Yan Xu, and Ted Ralphs.       *
    00020  * All Rights Reserved.                                                      *
    00021  *===========================================================================*/
    00022
    00023
    00024 //#############################################################################
    00025 // Borrow ideas from COIN/Cbc
    00026 //#############################################################################
    00027
    00028
    00029 #ifndef BcpsBranchObject_h_
    00030 #define BcpsBranchObject_h_
    00031
    00032 #include "BcpsModel.h"
    00033
    00034 #include "Alps.h"
    00035 #include "AlpsEncoded.h"
    00036
    00037
    00038 //#############################################################################
    00039
    00040
    00047 class BcpsBranchObject {
    00048
    00049  protected:
    00050
    00052     int type_;
    00053
    00055     BcpsModel *model_;
    00056
    00060     int objectIndex_;
    00061
    00069     double upScore_;
    00070
    00072     double downScore_;
    00074
    00078     int direction_;
    00079
    00082     double value_;
    00083
    00085     int numBranchesLeft_;
    00087
    00088  public:
    00089
    00091     BcpsBranchObject()
    00092         :
    00093         type_(0),
    00094         model_(NULL),
    00095         objectIndex_(-1),
    00096         upScore_(0),
    00097         downScore_(0),
    00098         direction_(0),
    00099         value_(0.0),
    00100         numBranchesLeft_(0)
    00101         {}
    00102
    00104     BcpsBranchObject(BcpsModel * model)
    00105         :
    00106         type_(0),
    00107         model_(model),
    00108         objectIndex_(-1),
    00109         upScore_(0),
    00110         downScore_(0),
    00111         direction_(0),
    00112         value_(0.0),
    00113         numBranchesLeft_(2)
    00114         {}
    00115
    00117     BcpsBranchObject(BcpsModel * model,
    00118                      int objectIndex,
    00119                      int direction ,
    00120                      double value)
    00121         :
    00122         type_(0),
    00123         model_(model),
    00124         objectIndex_(objectIndex),
    00125         upScore_(0),
    00126         downScore_(0),
    00127         direction_(direction),
    00128         value_(value),
    00129         numBranchesLeft_(2)
    00130         {}
    00131
    00133     BcpsBranchObject(BcpsModel * model,
    00134                      int objectIndex,
    00135                      int upScore,
    00136                      double downScore,
    00137                      int direction ,
    00138                      double value)
    00139         :
    00140         type_(0),
    00141         model_(model),
    00142         objectIndex_(objectIndex),
    00143         upScore_(upScore),
    00144         downScore_(downScore),
    00145         direction_(direction),
    00146         value_(value),
    00147         numBranchesLeft_(2)
    00148         {}
    00149
    00151     BcpsBranchObject (const BcpsBranchObject &);
    00152
    00154     virtual ~BcpsBranchObject() { /* Do nothing */}
    00155
    00157     BcpsBranchObject & operator = ( const BcpsBranchObject& rhs);
    00158
    00160     virtual BcpsBranchObject * clone() const = 0;
    00161
    00163     int getType() { return type_; }
    00164
    00166     void setType(int t) { type_ = t; }
    00167
    00169     virtual int numBranches() const { return 2; }
    00170
    00172     virtual int numBranchesLeft() const { return numBranchesLeft_; }
    00173
    00176     // THINK: what's the use of normalBranch?
    00177     virtual double branch(bool normalBranch = false) = 0;
    00178
    00180     virtual void print(bool normalBranch) {}
    00181
    00183     virtual bool boundBranch() const { return true; }
    00184
    00186     inline int getObjectIndex() const { return objectIndex_; }
    00187
    00189     inline void setObjectIndex(int ind) {  objectIndex_ = ind; }
    00190
    00192     inline double getUpScore() const { return upScore_; }
    00193
    00195     inline void setUpScore(double score) { upScore_ = score; }
    00196
    00198     inline double getDownScore() const { return downScore_; }
    00199
    00201     inline void setDownScore(double score) { downScore_ = score; }
    00202
    00204     inline int getDirection() const { return direction_; }
    00205
    00207     inline void setDirection(int direction) { direction_ = direction; }
    00208
    00210     inline double getValue() const { return value_; }
    00211
    00213     inline BcpsModel * model() const { return  model_; }
    00214
    00215  protected:
    00216
    00218     AlpsReturnStatus encodeBcps(AlpsEncoded *encoded) const {
    00219         AlpsReturnStatus status = AlpsReturnStatusOk;
    00220         assert(encoded);
    00221         encoded->writeRep(objectIndex_);
    00222         encoded->writeRep(upScore_);
    00223         encoded->writeRep(downScore_);
    00224         encoded->writeRep(direction_);
    00225         encoded->writeRep(value_);
    00226         encoded->writeRep(numBranchesLeft_);
    00227
    00228         return status;
    00229     }
    00230
    00232     AlpsReturnStatus decodeBcps(AlpsEncoded &encoded) {
    00233         AlpsReturnStatus status = AlpsReturnStatusOk;
    00234
    00235         encoded.readRep(objectIndex_);
    00236         encoded.readRep(upScore_);
    00237         encoded.readRep(downScore_);
    00238         encoded.readRep(direction_);
    00239         encoded.readRep(value_);
    00240         encoded.readRep(numBranchesLeft_);
    00241
    00242         return status;
    00243     }
    00244
    00245  public:
    00246
    00248     virtual AlpsReturnStatus encode(AlpsEncoded *encoded) const {
    00249         AlpsReturnStatus status = AlpsReturnStatusOk;
    00250         // Should never be called.
    00251         assert(0);
    00252         return status;
    00253     }
    00254
    00256     virtual AlpsReturnStatus decode(AlpsEncoded &encoded) {
    00257         AlpsReturnStatus status = AlpsReturnStatusOk;
    00258         // Should never be called.
    00259         assert(0);
    00260         return status;
    00261     }
    00262
    00263 };
    00264
    00265 #endif