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// Copyright (C) 2006, 2007 International Business Machines
// Corporation and others. All Rights Reserved.
#ifndef BonLpBranchingSolver_H
#define BonLpBranchingSolver_H
#include "BonStrongBranchingSolver.hpp"
#include "BonEcpCuts.hpp"
namespace Bonmin
{
/** Implementation of BonChooseVariable for curvature-based braching.
*/
class LpBranchingSolver : public StrongBranchingSolver
{
public:
/// Constructor from setup
LpBranchingSolver (BabSetupBase *b);
/// Copy constructor
LpBranchingSolver (const LpBranchingSolver &);
/// Assignment operator
LpBranchingSolver & operator= (const LpBranchingSolver& rhs);
/// Destructor
virtual ~LpBranchingSolver ();
/// Called to initialize solver before a bunch of strong branching
/// solves
virtual void markHotStart(OsiTMINLPInterface* tminlp_interface);
/// Called to solve the current TMINLP (with changed bound information)
virtual TNLPSolver::ReturnStatus solveFromHotStart(OsiTMINLPInterface* tminlp_interface);
/// Called after all strong branching solves in a node
virtual void unmarkHotStart(OsiTMINLPInterface* tminlp_interface);
void setMaxCuttingPlaneIter(int num)
{
maxCuttingPlaneIterations_ = num;
}
static void registerOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions);
private:
/// Default Constructor
LpBranchingSolver ();
/// Linear solver
OsiSolverInterface* lin_;
/// Warm start object for linear solver
CoinWarmStart* warm_;
/// Ecp cut generate
EcpCuts* ecp_;
/// Number of maximal ECP cuts
int maxCuttingPlaneIterations_;
/// absolute tolerance for ECP cuts
double abs_ecp_tol_;
/// relative tolerance for ECP cuts
double rel_ecp_tol_;
enum WarmStartMethod {
Basis=0 /** Use basis*/,
Clone /** clone problem*/
};
/// Way problems are warm started
WarmStartMethod warm_start_mode_;
};
}
#endif
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