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

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    00001 /*===========================================================================*
    00002  * This file is part of the BiCePS Linear Integer Solver (BLIS).             *
    00003  *                                                                           *
    00004  * BLIS 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  *                                                                           *
    00020  * Copyright (C) 2001-2011, Lehigh University, Yan Xu, and Ted Ralphs.       *
    00021  * All Rights Reserved.                                                      *
    00022  *===========================================================================*/
    00023
    00024 //#############################################################################
    00025 // This file is modified from from COIN/Cbc
    00026 //#############################################################################
    00027
    00028
    00029 #include "BcpsObject.h"
    00030 #include "BlisPseudo.h"
    00031
    00032 class BlisModel;
    00033
    00034 //#############################################################################
    00035
    00036 class BlisObjectInt : public BcpsObject {
    00037
    00038 protected:
    00039
    00041     int columnIndex_;
    00042
    00044     double originalLower_;
    00045
    00047     double originalUpper_;
    00048
    00050     double breakEven_;
    00051
    00053     BlisPseudocost pseudocost_;
    00054
    00055  public:
    00056
    00058     BlisObjectInt();
    00059
    00061     BlisObjectInt(int objectIndex,
    00062                   int iColumn,
    00063                   double lb,
    00064                   double ub,
    00065                   double breakEven = 0.5);
    00066
    00068     virtual ~BlisObjectInt() {}
    00069
    00071     BlisObjectInt( const BlisObjectInt &);
    00072
    00074     virtual BcpsObject * clone() const {
    00075         return new BlisObjectInt(*this);
    00076     }
    00077
    00079     BlisObjectInt & operator=( const BlisObjectInt& rhs);
    00080
    00083     virtual double infeasibility(BcpsModel *m, int & preferredWay) const;
    00084
    00091     virtual void feasibleRegion(BcpsModel *m);
    00092
    00094     virtual BcpsBranchObject * createBranchObject(BcpsModel *m,
    00095                                                   int direction) const;
    00096
    00111     virtual BcpsBranchObject * preferredNewFeasible(BcpsModel *m) const;
    00112
    00120     virtual BcpsBranchObject * notPreferredNewFeasible(BcpsModel *m) const ;
    00121
    00126     virtual void resetBounds(BcpsModel *m);
    00127
    00129     virtual int columnIndex() const { return columnIndex_; }
    00130
    00133     inline double originalLowerBound() const { return originalLower_; }
    00134     inline void setOriginalLowerBound(double value) { originalLower_=value; }
    00135     inline double originalUpperBound() const { return originalUpper_; }
    00136     inline void setOriginalUpperBound(double value) { originalUpper_=value; }
    00138
    00140     inline double breakEven() const { return breakEven_; }
    00141
    00143     inline void setBreakEven(double value) { breakEven_ = value; }
    00144
    00146     BlisPseudocost & pseudocost() { return pseudocost_; }
    00147 };
    00148