GamsFinalize.hpp File Reference

#include "GamsModel.hpp"
#include "GamsMessageHandler.hpp"
#include "OsiSolverInterface.hpp"

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Functions
void	GamsFinalizeOsi (GamsModel *gm, GamsMessageHandler *myout, OsiSolverInterface *solver, bool TimeLimitExceeded=false, bool HaveFeasibleSolution=false, bool swapRowStatus=false)
	Analyze solution stored in an OsiSolverInterface and writes GAMS solution file. More...
void	GamsWriteSolutionOsi (GamsModel *gm, GamsMessageHandler *myout, OsiSolverInterface *solver, bool swapRowStatus=false)
	Writes GAMS solution file for a solution stored in an OsiSolverInterface. More...

Function Documentation

void GamsFinalizeOsi	(	GamsModel *	gm,
		GamsMessageHandler *	myout,
		OsiSolverInterface *	solver,
		bool	TimeLimitExceeded = false,
		bool	HaveFeasibleSolution = false,
		bool	swapRowStatus = false
	)

Analyze solution stored in an OsiSolverInterface and writes GAMS solution file.

See Also

GamsWriteSolutionOsi on how the solution is written.

Parameters

gm	The GamsModel.
myout	A GAMS message handler for output.
solver	The OSI solver interface to read the solution from.
TimeLimitExceeded	Indicate, whether a time limit was exceeded. (Time Limits are not directly supported by OsiSolverInterface.)
HaveFeasibleSolution	In case that time or iteration limit is exceeded, this indicates whether a feasible solution was found. (Feasibility checks are not directly supported by OsiSolverInterface.)
swapRowStatus	Some OSI solvers think in term of artifical variables when dealing with the basis status of a row. Hence, the row status CoinWarmStartBasis::atLowerBound correponds to GamsModel::NonBasicUpper, and similar for atUpperBound. Setting swapRowStatus to true swaps atLowerBound and atUpperBound so that the row status in GAMS is correct again.

void GamsWriteSolutionOsi	(	GamsModel *	gm,
		GamsMessageHandler *	myout,
		OsiSolverInterface *	solver,
		bool	swapRowStatus = false
	)

Writes GAMS solution file for a solution stored in an OsiSolverInterface.

If solver->optimalBasisIsAvailable() returns positive, the basis returned by solver->getBasisStatus is used. Else, if solver->getWarmStart() returns a basis, then this basis is used. Otherwise we try to guess a basis, which is likely to fail.

Parameters

gm	The GamsModel.
myout	A GAMS message handler for output.
solver	The OSI solver interface to read the solution from.
swapRowStatus	Some OSI solvers think in term of artifical variables when dealing with the basis status of a row. Hence, the row status CoinWarmStartBasis::atLowerBound correponds to GamsModel::NonBasicUpper, and similar for atUpperBound. Setting swapRowStatus to true swaps atLowerBound and atUpperBound so that the row status in GAMS is correct again.