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/build/buildd/clp-1.11.1/Clp/src/ClpPrimalColumnPivot.hpp

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00001 /* $Id: ClpPrimalColumnPivot.hpp 1461 2009-11-06 19:06:43Z stefan $ */
00002 // Copyright (C) 2002, International Business Machines
00003 // Corporation and others.  All Rights Reserved.
00004 #ifndef ClpPrimalcolumnPivot_H
00005 #define ClpPrimalcolumnPivot_H
00006 
00007 class ClpSimplex;
00008 class CoinIndexedVector;
00009 
00010 //#############################################################################
00011 
00023 class ClpPrimalColumnPivot  {
00024   
00025 public:
00026   
00028 
00029   
00048   virtual int pivotColumn(CoinIndexedVector * updates,
00049                           CoinIndexedVector * spareRow1,
00050                           CoinIndexedVector * spareRow2,
00051                           CoinIndexedVector * spareColumn1,
00052                           CoinIndexedVector * spareColumn2) = 0;
00053   
00055   virtual void updateWeights(CoinIndexedVector * input);
00056   
00068   virtual void saveWeights(ClpSimplex * model,int mode)=0;
00074   virtual int pivotRow(double & way)
00075   {way=0;return -2;}
00077   virtual void clearArrays();
00079   virtual bool looksOptimal() const
00080   { return looksOptimal_;}
00082   virtual void setLooksOptimal(bool flag)
00083   { looksOptimal_ = flag;}
00085   
00086   
00088 
00089 
00090   ClpPrimalColumnPivot(); 
00091   
00093   ClpPrimalColumnPivot(const ClpPrimalColumnPivot &);
00094   
00096   ClpPrimalColumnPivot & operator=(const ClpPrimalColumnPivot& rhs);
00097   
00099   virtual ~ClpPrimalColumnPivot ();
00100 
00102   virtual ClpPrimalColumnPivot * clone(bool copyData = true) const = 0;
00103 
00105 
00107 
00108 
00109   inline ClpSimplex * model()
00110   { return model_;}
00112   inline void setModel(ClpSimplex * newmodel)
00113   { model_=newmodel;}
00114   
00116   inline int type()
00117   { return type_;}
00118 
00122   virtual int numberSprintColumns(int & numberIterations) const;
00124   virtual void switchOffSprint();
00126   virtual void maximumPivotsChanged() {}
00127   
00129 
00130   //---------------------------------------------------------------------------
00131   
00132 protected:
00134 
00135 
00136   ClpSimplex * model_;
00138   int type_;
00140   bool looksOptimal_;
00142 };
00143 
00144 #endif

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