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// Copyright (C) 2005, 2009 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors: Andreas Waechter IBM 2005-10-13
#ifndef __IPPDSEARCHDIRCALC_HPP__
#define __IPPDSEARCHDIRCALC_HPP__
#include "IpSearchDirCalculator.hpp"
#include "IpPDSystemSolver.hpp"
namespace Ipopt
{
/** Implementation of the search direction calculator that computes
* the pure primal dual step for the current barrier parameter.
*/
class IPOPTLIB_EXPORT PDSearchDirCalculator: public SearchDirectionCalculator
{
public:
/**@name Constructors/Destructors */
///@{
/** Constructor */
PDSearchDirCalculator(
const SmartPtr<PDSystemSolver>& pd_solver
);
/** Destructor */
virtual ~PDSearchDirCalculator();
///@}
/** overloaded from AlgorithmStrategyObject */
virtual bool InitializeImpl(
const OptionsList& options,
const std::string& prefix
);
/** Method for computing the search direction.
*
* The computed direction is stored in IpData().delta().
*/
virtual bool ComputeSearchDirection();
static void RegisterOptions(
const SmartPtr<RegisteredOptions>& roptions
);
/** Returns the pd_solver for additional processing. */
SmartPtr<PDSystemSolver> PDSolver()
{
return pd_solver_;
}
private:
/**@name Default Compiler Generated Methods
* (Hidden to avoid implicit creation/calling).
*
* These methods are not implemented and
* we do not want the compiler to implement
* them for us, so we declare them private
* and do not define them. This ensures that
* they will not be implicitly created/called.
*/
///@{
/** Default Constructor */
PDSearchDirCalculator();
/** Copy Constructor */
PDSearchDirCalculator(
const PDSearchDirCalculator&
);
/** Default Assignment Operator */
void operator=(
const PDSearchDirCalculator&
);
///@}
/** @name Strategy objects */
///@{
SmartPtr<PDSystemSolver> pd_solver_;
///@}
/** @name Algorithmic parameters */
///@{
/** Flag indicating that we trust that the steps from the linear
* solver are very good and that we don't need any residual
* checks. */
bool fast_step_computation_;
/** Flag indicating if we want to do Mehrotras's algorithm.
*
* This means that a number of options are ignored, or have
* to be set (or are automatically set) to certain values.
*/
bool mehrotra_algorithm_;
///@}
};
} // namespace Ipopt
#endif