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author | Harpreet | 2016-08-04 15:25:44 +0530 |
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committer | Harpreet | 2016-08-04 15:25:44 +0530 |
commit | 9fd2976931c088dc523974afb901e96bad20f73c (patch) | |
tree | 22502de6e6988d5cd595290d11266f8432ad825b /build/Bonmin/include/coin/CglCutGenerator.hpp | |
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initial add
Diffstat (limited to 'build/Bonmin/include/coin/CglCutGenerator.hpp')
-rw-r--r-- | build/Bonmin/include/coin/CglCutGenerator.hpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/build/Bonmin/include/coin/CglCutGenerator.hpp b/build/Bonmin/include/coin/CglCutGenerator.hpp new file mode 100644 index 0000000..7629140 --- /dev/null +++ b/build/Bonmin/include/coin/CglCutGenerator.hpp @@ -0,0 +1,121 @@ +// Copyright (C) 2000, International Business Machines +// Corporation and others. All Rights Reserved. +// This code is licensed under the terms of the Eclipse Public License (EPL). + +#ifndef CglCutGenerator_H +#define CglCutGenerator_H + +#include "OsiCuts.hpp" +#include "OsiSolverInterface.hpp" +#include "CglTreeInfo.hpp" + +//------------------------------------------------------------------- +// +// Abstract base class for generating cuts. +// +//------------------------------------------------------------------- +/// +/** Cut Generator Base Class + +This is an abstract base class for generating cuts. A specific cut +generator will inherit from this class. +*/ +class CglCutGenerator { + +public: + + /**@name Generate Cuts */ + //@{ + /** Generate cuts for the model data contained in si. + The generated cuts are inserted into and returned in the + collection of cuts cs. + */ + virtual void generateCuts( const OsiSolverInterface & si, OsiCuts & cs, + const CglTreeInfo info = CglTreeInfo())=0; + //@} + + + /**@name Constructors and destructors */ + //@{ + /// Default constructor + CglCutGenerator (); + + /// Copy constructor + CglCutGenerator ( const CglCutGenerator &); + + /// Clone + virtual CglCutGenerator * clone() const = 0; + + /// Assignment operator + CglCutGenerator & operator=(const CglCutGenerator& rhs); + + /// Destructor + virtual ~CglCutGenerator (); + + /** Create C++ lines to set the generator in the current state. + The output must be parsed by the calling code, as each line + starts with a key indicating the following:<BR> + 0: must be kept (for #includes etc)<BR> + 3: Set to changed (not default) values<BR> + 4: Set to default values (redundant)<BR> + + Keys 1, 2, 5, 6, 7, 8 are defined, but not applicable to + cut generators. + */ + virtual std::string generateCpp( FILE * ) {return "";} + + /// This can be used to refresh any information + virtual void refreshSolver(OsiSolverInterface * ) {} + //@} + + /**@name Gets and Sets */ + //@{ + /** + Get Aggressiveness - 0 = neutral, 100 is normal root node. + Really just a hint to cut generator + */ + inline int getAggressiveness() const + { return aggressive_;} + + /** + Set Aggressiveness - 0 = neutral, 100 is normal root node. + Really just a hint to cut generator + */ + inline void setAggressiveness(int value) + { aggressive_=value;} + /// Set whether can do global cuts + inline void setGlobalCuts(bool trueOrFalse) + { canDoGlobalCuts_ = trueOrFalse;} + /// Say whether can do global cuts + inline bool canDoGlobalCuts() const + {return canDoGlobalCuts_;} + /** + Returns true if may generate Row cuts in tree (rather than root node). + Used so know if matrix will change in tree. Really + meant so column cut generators can still be active + without worrying code. + Default is true + */ + virtual bool mayGenerateRowCutsInTree() const; + /// Return true if needs optimal basis to do cuts + virtual bool needsOptimalBasis() const; + /// Return maximum length of cut in tree + virtual int maximumLengthOfCutInTree() const + { return COIN_INT_MAX;} + //@} + + // test this class + //static void unitTest(); + +// private: + + /** + Aggressiveness - 0 = neutral, 100 is normal root node. + Really just a hint to cut generator + */ + int aggressive_; + /// True if can do global cuts i.e. no general integers + bool canDoGlobalCuts_; +}; + +#endif |