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// Copyright (C) 2007, International Business Machines Corporation and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors :
// Joao P. Goncalves, International Business Machines Corporation
//
// Date : November 12, 2007
#ifndef BonHeuristicDiveVectorLength_H
#define BonHeuristicDiveVectorLength_H
#include "BonBonminSetup.hpp"
#include "BonHeuristicDive.hpp"
/** DiveVectorLength class
*/
namespace Bonmin
{
class HeuristicDiveVectorLength : public HeuristicDive {
public:
/// Default Constructor
HeuristicDiveVectorLength ();
/// Constructor with setup
HeuristicDiveVectorLength(BonminSetup * setup);
/// Copy constructor
HeuristicDiveVectorLength(const HeuristicDiveVectorLength ©);
/// Destructor
~HeuristicDiveVectorLength()
{
delete [] columnLength_;
}
/// Assignment operator
HeuristicDiveVectorLength & operator=(const HeuristicDiveVectorLength & rhs);
/// Clone
virtual CbcHeuristic * clone() const;
/** Change setup used for heuristic.*/
virtual void setSetup(BonminSetup * setup){
HeuristicDive::setSetup(setup);
Initialize(setup->options());
}
/// sets internal variables
virtual void setInternalVariables(TMINLP2TNLP* minlp);
/// Selects the next variable to branch on
/** If bestColumn = -1, it means that no variable was found
*/
virtual void selectVariableToBranch(TMINLP2TNLP* minlp,
const vector<int> & integerColumns,
const double* newSolution,
int& bestColumn,
int& bestRound);
/** Register the options common to all local search based heuristics.*/
static void registerOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions);
/** Initiaize using passed options.*/
void Initialize(Ipopt::SmartPtr<Ipopt::OptionsList> options);
private:
/// the number of nonzero elements in each column
int* columnLength_;
};
}
#endif
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