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+// (C) Copyright CNRS
+// This code is published under the Eclipse Public License.
+//
+// Authors :
+// Pierre Bonami, LIF Université de la Méditérannée-CNRS
+//
+// Date : 06/18/2008
+
+#ifndef BonLocalSolverBasedHeuristic_H
+#define BonLocalSolverBasedHeuristic_H
+#include "BonBonminSetup.hpp"
+#include "CbcHeuristic.hpp"
+
+namespace Bonmin {
+ class LocalSolverBasedHeuristic : public CbcHeuristic {
+ public:
+ /** Default constructor.*/
+ LocalSolverBasedHeuristic();
+
+ /** Constructor with setup.*/
+ LocalSolverBasedHeuristic(BonminSetup * setup);
+
+ /** Copy constructor.*/
+ LocalSolverBasedHeuristic(const LocalSolverBasedHeuristic & other);
+
+ /** Destructor.*/
+ ~LocalSolverBasedHeuristic();
+
+ /** Virtual copy constructor.*/
+ virtual CbcHeuristic * clone() const = 0;
+
+ /// Assignment operator
+ LocalSolverBasedHeuristic & operator=(const LocalSolverBasedHeuristic& rhs);
+
+#if 0
+ /// update model (This is needed if cliques update matrix etc)
+ virtual void setModel(CbcModel * model){throw -1;}
+#endif
+ /// Resets stuff if model changes
+ virtual void resetModel(CbcModel * model){
+ setModel(model);
+ }
+
+ /** Change setup used for heuristic.*/
+ void setSetup(BonminSetup * setup){
+ setup_ = setup;
+ Initialize(setup_->options());
+ }
+ /** Performs heuristic */
+ virtual int solution(double & objectiveValue,
+ double * newSolution)=0;
+
+ /** Performs heuristic which adds cuts */
+ virtual int solution(double & objectiveValue,
+ double * newSolution,
+ OsiCuts & cs) {return 0;}
+
+
+ /** Do a local search based on setup and passed solver.*/
+ int doLocalSearch(OsiTMINLPInterface * solver,
+ double *solution,
+ double & solValue,
+ double cutoff, std::string prefix = "local_solver.") const;
+
+ /** Register the options common to all local search based heuristics.*/
+ static void registerOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions);
+
+ /** Setup the defaults.*/
+ virtual void setupDefaults(Ipopt::SmartPtr<Ipopt::OptionsList> options);
+
+ /** Initiaize using passed options.*/
+ void Initialize(Ipopt::SmartPtr<Ipopt::OptionsList> options);
+ protected:
+ /** Setup to use for local searches (will make copies).*/
+ BonminSetup * setup_;
+
+ static void changeIfNotSet(Ipopt::SmartPtr<Ipopt::OptionsList> options,
+ std::string prefix,
+ const std::string &option,
+ const std::string &value);
+
+ static void changeIfNotSet(Ipopt::SmartPtr<Ipopt::OptionsList> options,
+ std::string prefix,
+ const std::string &option,
+ const double &value);
+
+ static void changeIfNotSet(Ipopt::SmartPtr<Ipopt::OptionsList> options,
+ std::string prefix,
+ const std::string &option,
+ const int &value);
+ private:
+ /** Time limit in local search.*/
+ double time_limit_;
+ /** maximal number of nodes in local search.*/
+ int max_number_nodes_;
+ /** Maximal number of solutions in local search.*/
+ int max_number_solutions_;
+ };
+} /** ends namespace Bonmin.*/
+
+#endif
+