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// Copyright (C) 2005, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpHessianUpdater.hpp 735 2006-06-04 06:10:05Z andreasw $
//
// Authors:  Andreas Waechter            IBM    2005-12-26

#ifndef __IPHESSIANUPDATER_HPP__
#define __IPHESSIANUPDATER_HPP__

#include "IpAlgStrategy.hpp"

namespace Ipopt
{

  class HessianUpdater : public AlgorithmStrategyObject
  {
  public:
    HessianUpdater()
    {}

    virtual ~HessianUpdater()
    {}

    virtual bool InitializeImpl(const OptionsList& options,
                                const std::string& prefix) = 0;

    virtual void UpdateHessian() = 0;

  private:
    HessianUpdater(const HessianUpdater&);

    void operator=(const HessianUpdater&);

  };

} // namespace Ipopt

#endif

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