/home/coin/SVN-release/CoinAll-1.1.0/Ipopt/src/Algorithm/IpRestoMinC_1Nrm.hpp

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// Copyright (C) 2004, 2008 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpRestoMinC_1Nrm.hpp 1219 2008-04-25 18:14:35Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13

#ifndef __IPRESTOC_1NRM_HPP__
#define __IPRESTOC_1NRM_HPP__

#include "IpRestoPhase.hpp"
#include "IpIpoptAlg.hpp"
#include "IpEqMultCalculator.hpp"

namespace Ipopt
{

  class MinC_1NrmRestorationPhase : public RestorationPhase
  {
  public:
    MinC_1NrmRestorationPhase(IpoptAlgorithm& resto_alg,
                              const SmartPtr<EqMultiplierCalculator>& eq_mult_calculator);

    virtual ~MinC_1NrmRestorationPhase();

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

    static void RegisterOptions(SmartPtr<RegisteredOptions> roptions);

  protected:
    virtual bool PerformRestoration();

  private:
    MinC_1NrmRestorationPhase();

    MinC_1NrmRestorationPhase(const MinC_1NrmRestorationPhase&);

    void operator=(const MinC_1NrmRestorationPhase&);

    SmartPtr<IpoptAlgorithm> resto_alg_;
    SmartPtr<EqMultiplierCalculator> eq_mult_calculator_;

    SmartPtr<OptionsList> resto_options_;

    Number constr_mult_reset_threshold_;
    Number bound_mult_reset_threshold_;
    bool expect_infeasible_problem_;
    Number constr_viol_tol_;

    Index count_restorations_;

    void ComputeBoundMultiplierStep(Vector& delta_z,
                                    const Vector& curr_z,
                                    const Vector& curr_slack,
                                    const Vector& trial_slack);
  };

} // namespace Ipopt

#endif

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