OsiSolver Class Reference

Class to solve problems through Osi. More...

#include <OsiSolver.h>

Inheritance diagram for OsiSolver:

Public Member Functions
	OsiSolver ()
	Constructor.
	~OsiSolver ()
	Destructor.
void	setMaxTime (double time)
	Set maximum time allowed to solve the problem.
double	getMaxTime ()
	Get maximum time allowed to solve the problem.
void	setNumThreads (int numThreads)
	Set the maximum number of threads that the solver can use to solve the problem.
int	getNumThreads ()
	Get the maximum number of threads that the solver can use to solve the problem.
void	setFirstFeasible (bool stopAtFirstFeasible)
	Set if the execution must be stopped at first feasible solution.
bool	getFirstFeasible ()
	Get if the execution must be stopped at first feasible solution.
void	setLogFileName (char *filename)
	Set the name of the log file.
const char *	getLogFileName ()
	Get the name of the log file.
OsiSolverInterface *	getSolverInterface ()
	Get solver interface.
virtual void	readMps (const char *filename)
	Load a problem from a mps file.
void	loadProblem (int numRows, int numColumns, int nz, double obj[], double qobj[], double lb[], double ub[], double lhs[], double rhs[], int begRows[], int indCols[], double values[], bool copy_vectors=true)
	Load a problem.
virtual STATUS	solve ()
	Solve the problem loaded.
double	getObjValue ()
	Get the objective function value.
virtual const double *	getSolution ()
	Get the solution.
int	getNumVars ()
	Get the number of variables.
virtual const string *	getVarNames ()
	Get the name of variables.

Protected Member Functions
void	freeMemory ()
	Free all allocated memory.
virtual void	loadQuadraticObj (double qobj[])
	Load the quadratic objective function cost.

Protected Attributes
double	maxTime
	Maximum time allowed to solve the problem.
bool	stopAtFirstFeasible
	True if the execution must be stopped at first feasible solution.
bool	solved
	True if at least a initial solve has been done.
int	numThreads
	Number of threads to use.
OsiSolverInterface *	si
	Osi environment.
CoinMessageHandler *	cmh
	To redirect the output.
FILE *	f
	Output file.
char *	filename
	Name of file.
double	fobj
	Objective function value.

Detailed Description

Class to solve problems through Osi.

Note

Virtual class, not must be instantiated

Member Function Documentation

bool OsiSolver::getFirstFeasible ( )

inline

Get if the execution must be stopped at first feasible solution.

Note

This option only will be used when the problem loaded contains binary variables

Returns

If the execution must be stopped at first feasible solution

double OsiSolver::getMaxTime ( )

inline

Get maximum time allowed to solve the problem.

Returns

Maximum time allowed to solve the problem

int OsiSolver::getNumThreads ( )

inline

Get the maximum number of threads that the solver can use to solve the problem.

Returns

Maximum number of threads that the solver can use to solve the problem, -1 if unlimited

int OsiSolver::getNumVars ( )

inline

Get the number of variables.

Returns

Number of variables

const double * OsiSolver::getSolution ( )

virtual

Get the solution.

Returns

Solution

Reimplemented in OsiXpress.

OsiSolverInterface * OsiSolver::getSolverInterface ( )

inline

Get solver interface.

Returns

Solver interface

const string * OsiSolver::getVarNames ( )

virtual

Get the name of variables.

Returns

Name of variables

Reimplemented in OsiXpress, and OsiCplex.

void OsiSolver::loadProblem	(	int	numRows,
		int	numColumns,
		int	nz,
		double	obj[],
		double	qobj[],
		double	lb[],
		double	ub[],
		double	lhs[],
		double	rhs[],
		int	begRows[],
		int	indCols[],
		double	values[],
		bool	copy_vectors = true
	)

Load a problem.

Parameters

numRows	Number of rows
numColumns	Number of columns
nz	Number of non-zero elements in the sparse matrix
obj	Objective function values, if NULL, all variables have 0 objective coefficient
qobj	Quadratic coefficients of the separable quadratic objective, if NULL, all variables have 0 quadratic coefficients
lb	Lower bound of variables
ub	Upper bound of variables, if NULL, all columns have upper bound infinity.
lhs	Lower bound of restrictions, if NULL, all columns have lower bound 0
rhs	Upper bound of restrictions, if NULL, all rows have upper bound infinity
begRows	Index to the begining of each row, if NULL, all rows have lower bound -infinity
indCols	Index of each column
values	Value of each non-zero element
copy_vectors	if false the vectors will be used freed with delete[] after optimization TODO

void OsiSolver::loadQuadraticObj ( double  qobj[] )

protectedvirtual

Load the quadratic objective function cost.

Parameters

qobj	Quadratic coefficients of the separable quadratic objective

Reimplemented in OsiXpress, OsiCplex, and OsiClp.

void OsiSolver::setFirstFeasible ( bool  stopAtFirstFeasible )

inline

Set if the execution must be stopped at first feasible solution.

Note

This option only will be used when the problem loaded contains binary variables

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

• /home/jcastro2/intpoint/BlockIPPlatform/OsiInterface/OsiSolver.h
• /home/jcastro2/intpoint/BlockIPPlatform/OsiInterface/OsiSolver.cpp