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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