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# /home/coin/SVN-release/Osi-0.98.1/Clp/src/ClpPrimalColumnPivot.hpp

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    00001 // Copyright (C) 2002, International Business Machines
    00002 // Corporation and others.  All Rights Reserved.
    00003 #ifndef ClpPrimalcolumnPivot_H
    00004 #define ClpPrimalcolumnPivot_H
    00005
    00006 class ClpSimplex;
    00007 class CoinIndexedVector;
    00008
    00009 //#############################################################################
    00010
    00022 class ClpPrimalColumnPivot  {
    00023
    00024 public:
    00025
    00027
    00028
    00047   virtual int pivotColumn(CoinIndexedVector * updates,
    00048                           CoinIndexedVector * spareRow1,
    00049                           CoinIndexedVector * spareRow2,
    00050                           CoinIndexedVector * spareColumn1,
    00051                           CoinIndexedVector * spareColumn2) = 0;
    00052
    00054   virtual void updateWeights(CoinIndexedVector * input);
    00055
    00067   virtual void saveWeights(ClpSimplex * model,int mode)=0;
    00073   virtual int pivotRow(double & way)
    00074   {way=0;return -2;}
    00076   virtual void clearArrays();
    00078   virtual bool looksOptimal() const
    00079   { return looksOptimal_;}
    00081   virtual void setLooksOptimal(bool flag)
    00082   { looksOptimal_ = flag;}
    00084
    00085
    00087
    00088
    00089   ClpPrimalColumnPivot();
    00090
    00092   ClpPrimalColumnPivot(const ClpPrimalColumnPivot &);
    00093
    00095   ClpPrimalColumnPivot & operator=(const ClpPrimalColumnPivot& rhs);
    00096
    00098   virtual ~ClpPrimalColumnPivot ();
    00099
    00101   virtual ClpPrimalColumnPivot * clone(bool copyData = true) const = 0;
    00102
    00104
    00106
    00107
    00108   inline ClpSimplex * model()
    00109   { return model_;}
    00110
    00112   inline int type()
    00113   { return type_;}
    00114
    00118   virtual int numberSprintColumns(int & numberIterations) const;
    00120   virtual void switchOffSprint();
    00122   virtual void maximumPivotsChanged() {}
    00123
    00125
    00126   //---------------------------------------------------------------------------
    00127
    00128 protected:
    00130
    00131
    00132   ClpSimplex * model_;
    00134   int type_;
    00136   bool looksOptimal_;
    00138 };
    00139
    00140 #endif