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// Copyright (C) 2005, 2007 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpPDSearchDirCalc.hpp 549 2005-10-24 21:49:13Z andreasw $
//
// Authors:  Andreas Waechter            IBM    2005-10-13

#ifndef __IPPDSEARCHDIRCALC_HPP__
#define __IPPDSEARCHDIRCALC_HPP__

#include "IpSearchDirCalculator.hpp"
#include "IpPDSystemSolver.hpp"

namespace Ipopt
{

  class PDSearchDirCalculator : public SearchDirectionCalculator
  {
  public:
    PDSearchDirCalculator(const SmartPtr<PDSystemSolver>& pd_solver);

    virtual ~PDSearchDirCalculator();

    virtual bool InitializeImpl(const OptionsList& options,
                                const std::string& prefix);

    virtual bool ComputeSearchDirection();

    static void RegisterOptions(const SmartPtr<RegisteredOptions>& roptions);

  private:
    PDSearchDirCalculator();

    PDSearchDirCalculator(const PDSearchDirCalculator&);

    void operator=(const PDSearchDirCalculator&);

    SmartPtr<PDSystemSolver> pd_solver_;

    bool fast_step_computation_;
    bool mehrotra_algorithm_;

  };

} // namespace Ipopt

#endif

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