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69 lines
2.1 KiB
69 lines
2.1 KiB
// Copyright (C) 2004, 2006 International Business Machines and others.
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// All Rights Reserved.
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// This code is published under the Eclipse Public License.
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//
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// $Id: IpMuUpdate.hpp 1861 2010-12-21 21:34:47Z andreasw $
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//
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// Authors: Carl Laird, Andreas Waechter IBM 2004-08-13
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#ifndef __IPMUUPDATE_HPP__
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#define __IPMUUPDATE_HPP__
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#include "IpAlgStrategy.hpp"
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namespace Ipopt
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{
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/** Abstract Base Class for classes that implement methods for computing
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* the barrier and fraction-to-the-boundary rule parameter for the
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* current iteration.
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*/
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class MuUpdate : public AlgorithmStrategyObject
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{
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public:
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/**@name Constructors/Destructors */
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//@{
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/** Default Constructor */
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MuUpdate()
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{}
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/** Default destructor */
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virtual ~MuUpdate()
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{}
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//@}
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/** Initialize method - overloaded from AlgorithmStrategyObject */
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virtual bool InitializeImpl(const OptionsList& options,
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const std::string& prefix) = 0;
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/** Method for determining the barrier parameter for the next
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* iteration. A LineSearch object is passed, so that this method
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* can call the Reset method in the LineSearch object, for
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* example when then barrier parameter is changed. This method is
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* also responsible for setting the fraction-to-the-boundary
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* parameter tau. This method returns false if the update could
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* not be performed and the algorithm should revert to an
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* emergency fallback mechanism. */
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virtual bool UpdateBarrierParameter() = 0;
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private:
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/**@name Default Compiler Generated Methods
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* (Hidden to avoid implicit creation/calling).
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* These methods are not implemented and
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* we do not want the compiler to implement
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* them for us, so we declare them private
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* and do not define them. This ensures that
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* they will not be implicitly created/called. */
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//@{
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/** Copy Constructor */
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MuUpdate(const MuUpdate&);
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/** Overloaded Equals Operator */
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void operator=(const MuUpdate&);
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//@}
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};
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} // namespace Ipopt
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#endif
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