CglZeroHalf Class Reference

Zero Half Cut Generator Class. More...

#include <CglZeroHalf.hpp>

Inheritance diagram for CglZeroHalf:

Collaboration diagram for CglZeroHalf:

Public Member Functions
Generate Cuts
virtual void	generateCuts (const OsiSolverInterface &si, OsiCuts &cs, const CglTreeInfo info=CglTreeInfo())
	Generate zero half cuts for the model accessed through the solver interface. More...
Sets and Gets
int	getFlags () const
	Get flags. More...
void	setFlags (int value)
	Set flags. More...
Constructors and destructors
	CglZeroHalf ()
	Default constructor. More...
	CglZeroHalf (const CglZeroHalf &)
	Copy constructor. More...
virtual CglCutGenerator *	clone () const
	Clone. More...
CglZeroHalf &	operator= (const CglZeroHalf &rhs)
	Assignment operator. More...
virtual	~CglZeroHalf ()
	Destructor. More...
virtual std::string	generateCpp (FILE *fp)
	Create C++ lines to get to current state. More...
virtual void	refreshSolver (OsiSolverInterface *solver)
	This can be used to refresh any information. More...
Public Member Functions inherited from CglCutGenerator
	CglCutGenerator ()
	Default constructor. More...
	CglCutGenerator (const CglCutGenerator &)
	Copy constructor. More...
CglCutGenerator &	operator= (const CglCutGenerator &rhs)
	Assignment operator. More...
virtual	~CglCutGenerator ()
	Destructor. More...
int	getAggressiveness () const
	Get Aggressiveness - 0 = neutral, 100 is normal root node. More...
void	setAggressiveness (int value)
	Set Aggressiveness - 0 = neutral, 100 is normal root node. More...
void	setGlobalCuts (bool trueOrFalse)
	Set whether can do global cuts. More...
bool	canDoGlobalCuts () const
	Say whether can do global cuts. More...
virtual bool	mayGenerateRowCutsInTree () const
	Returns true if may generate Row cuts in tree (rather than root node). More...
virtual bool	needsOptimalBasis () const
	Return true if needs optimal basis to do cuts. More...
virtual int	maximumLengthOfCutInTree () const
	Return maximum length of cut in tree. More...

Friends
void	CglZeroHalfUnitTest (const OsiSolverInterface *siP, const std::string mpdDir)
	A function that tests the methods in the CglZeroHalf class. More...

Additional Inherited Members
Public Attributes inherited from CglCutGenerator
int	aggressive_
	Aggressiveness - 0 = neutral, 100 is normal root node. More...
bool	canDoGlobalCuts_
	True if can do global cuts i.e. no general integers. More...

Detailed Description

Zero Half Cut Generator Class.

This class generates zero half cuts via the following method:

See -

G. Andreello, A. Caprara, M. Fischetti, “Embedding Cuts in a Branch and Cut Framework: a Computational Study with {0,1/2}-Cuts”, INFORMS Journal on Computing 19(2), 229-238, 2007.

Definition at line 26 of file CglZeroHalf.hpp.

Constructor & Destructor Documentation

CglZeroHalf::CglZeroHalf

(

)

Default constructor.

CglZeroHalf::CglZeroHalf

(

const CglZeroHalf &

)

Copy constructor.

virtual CglZeroHalf::~CglZeroHalf ( )

virtual

Destructor.

Member Function Documentation

virtual void CglZeroHalf::generateCuts ( const OsiSolverInterface &  si, OsiCuts &  cs, const CglTreeInfo  info = CglTreeInfo()  )

virtual

Generate zero half cuts for the model accessed through the solver interface.

Insert generated cuts into the cut set cs.

Implements CglCutGenerator.

int CglZeroHalf::getFlags ( ) const

inline

Get flags.

Definition at line 44 of file CglZeroHalf.hpp.

void CglZeroHalf::setFlags ( int  value )

inline

Set flags.

Definition at line 47 of file CglZeroHalf.hpp.

virtual CglCutGenerator* CglZeroHalf::clone ( ) const

virtual

Clone.

Implements CglCutGenerator.

CglZeroHalf& CglZeroHalf::operator=

(

const CglZeroHalf &

rhs

)

Assignment operator.

virtual std::string CglZeroHalf::generateCpp ( FILE *  fp )

virtual

Create C++ lines to get to current state.

Reimplemented from CglCutGenerator.

virtual void CglZeroHalf::refreshSolver ( OsiSolverInterface *  solver )

virtual

This can be used to refresh any information.

Reimplemented from CglCutGenerator.

Friends And Related Function Documentation

void CglZeroHalfUnitTest ( const OsiSolverInterface *  siP, const std::string  mpdDir  )

friend

A function that tests the methods in the CglZeroHalf class.

The only reason for it not to be a member method is that this way it doesn't have to be compiled into the library. And that's a gain, because the library should be compiled with optimization on, but this method should be compiled with debugging.

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The documentation for this class was generated from the following file:

• src/CglZeroHalf/CglZeroHalf.hpp