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# /home/coin/SVN-release/Blis-0.91.2/Cgl/src/CglGomory/CglGomory.hpp

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    00001 // Copyright (C) 2002, International Business Machines
    00002 // Corporation and others.  All Rights Reserved.
    00003 #ifndef CglGomory_H
    00004 #define CglGomory_H
    00005
    00006 #include <string>
    00007
    00008 #include "CglCutGenerator.hpp"
    00009
    00010 class CoinWarmStartBasis;
    00012 class CglGomory : public CglCutGenerator {
    00013    friend void CglGomoryUnitTest(const OsiSolverInterface * siP,
    00014                                   const std::string mpdDir );
    00015
    00016 public:
    00017
    00018
    00032   virtual void generateCuts( const OsiSolverInterface & si, OsiCuts & cs,
    00033                              const CglTreeInfo info = CglTreeInfo()) const;
    00036   int generateCuts( const OsiRowCutDebugger * debugger,
    00037                     OsiCuts & cs,
    00038                     const CoinPackedMatrix & columnCopy,
    00039                     const CoinPackedMatrix & rowCopy,
    00040                     const double * colsol,
    00041                     const double * colLower, const double * colUpper,
    00042                     const double * rowLower, const double * rowUpper,
    00043                     const char * intVar ,
    00044                     const CoinWarmStartBasis* warm,
    00045                     const CglTreeInfo info = CglTreeInfo()) const;
    00048   int generateCuts( const OsiRowCutDebugger * debugger,
    00049                     OsiCuts & cs,
    00050                     const CoinPackedMatrix & columnCopy,
    00051                     const double * colsol,
    00052                     const double * colLower, const double * colUpper,
    00053                     const double * rowLower, const double * rowUpper,
    00054                     const char * intVar ,
    00055                     const CoinWarmStartBasis* warm,
    00056                     const CglTreeInfo info = CglTreeInfo()) const;
    00057
    00059   virtual bool needsOptimalBasis() const;
    00061
    00064
    00065   void setLimit(int limit);
    00067   int getLimit() const;
    00069   void setLimitAtRoot(int limit);
    00071   int getLimitAtRoot() const;
    00073   virtual int maximumLengthOfCutInTree() const;
    00075
    00080
    00081   void setAway(double value);
    00083   double getAway() const;
    00085   void setAwayAtRoot(double value);
    00087   double getAwayAtRoot() const;
    00089
    00099
    00100   void setConditionNumberMultiplier(double value);
    00102   double getConditionNumberMultiplier() const;
    00104   void setLargestFactorMultiplier(double value);
    00106   double getLargestFactorMultiplier() const;
    00108
    00111
    00112   inline void useAlternativeFactorization(bool yes=true)
    00113   { alternateFactorization_= (yes) ? 1 : 0;}
    00115   inline bool alternativeFactorization() const
    00116   { return (alternateFactorization_!=0);}
    00118
    00121
    00122   CglGomory ();
    00123
    00125   CglGomory (
    00126     const CglGomory &);
    00127
    00129   virtual CglCutGenerator * clone() const;
    00130
    00132   CglGomory &
    00133     operator=(
    00134     const CglGomory& rhs);
    00135
    00137   virtual
    00138     ~CglGomory ();
    00140   virtual std::string generateCpp( FILE * fp);
    00142
    00143 private:
    00144
    00145  // Private member methods
    00146
    00147   // Private member data
    00148
    00151
    00152   double away_;
    00154   double awayAtRoot_;
    00156   double conditionNumberMultiplier_;
    00158   double largestFactorMultiplier_;
    00160   int limit_;
    00162   int limitAtRoot_;
    00164   mutable int dynamicLimitInTree_;
    00166   mutable int numberTimesStalled_;
    00168   int alternateFactorization_;
    00170 };
    00171
    00172 //#############################################################################
    00178 void CglGomoryUnitTest(const OsiSolverInterface * siP,
    00179                         const std::string mpdDir );
    00180
    00181 #endif