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// Copyright (C) 2008 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors: Andreas Waechter IBM 2008-08-31
#ifndef __IPINEXACTSEARCHDIRCALC_HPP__
#define __IPINEXACTSEARCHDIRCALC_HPP__
#include "IpSearchDirCalculator.hpp"
#include "IpInexactCq.hpp"
#include "IpInexactNormalStepCalc.hpp"
#include "IpInexactPDSolver.hpp"
namespace Ipopt
{
/** Implementation of the search direction calculator that computes
* the search direction using iterative linear solvers.
*
* Those steps do not necessarily satisfy the linearized KKT conditions
* with high accuracy.
*/
class InexactSearchDirCalculator: public SearchDirectionCalculator
{
public:
/**@name Constructors/Destructors */
///@{
/** Constructor */
InexactSearchDirCalculator(
SmartPtr<InexactNormalStepCalculator> normal_step_calculator,
SmartPtr<InexactPDSolver> inexact_pd_solver
);
/** Destructor */
virtual ~InexactSearchDirCalculator();
///@}
virtual bool InitializeImpl(
const OptionsList& options,
const std::string& prefix
);
/** Method for computing the search direction.
*
* In this version,
* we compute a normal and a tangential component, which are
* stored in the InexactData object. The overall step is still
* stored in the IpoptData object.
*/
virtual bool ComputeSearchDirection();
static void RegisterOptions(
SmartPtr<RegisteredOptions> roptions
);
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 */
InexactSearchDirCalculator();
/** Copy Constructor */
InexactSearchDirCalculator(
const InexactSearchDirCalculator&
);
/** Overloaded Assignment Operator */
void operator=(
const InexactSearchDirCalculator&
);
///@}
/** Method to easily access Inexact data */
InexactData& InexData()
{
InexactData& inexact_data = static_cast<InexactData&>(IpData().AdditionalData());
DBG_ASSERT(dynamic_cast<InexactData*>(&IpData().AdditionalData()));
return inexact_data;
}
/** Method to easily access Inexact calculated quantities */
InexactCq& InexCq()
{
InexactCq& inexact_cq = static_cast<InexactCq&>(IpCq().AdditionalCq());
DBG_ASSERT(dynamic_cast<InexactCq*>(&IpCq().AdditionalCq()));
return inexact_cq;
}
/** @name Algorithmic options */
///@{
/** termination tolerance for local infeasibility */
Number local_inf_Ac_tol_;
///@}
/** @name Strategy objects */
///@{
SmartPtr<InexactNormalStepCalculator> normal_step_calculator_;
SmartPtr<InexactPDSolver> inexact_pd_solver_;
///@}
/** enumeration for decomposition options */
enum DecompositionTypeEnum
{
ALWAYS = 0,
ADAPTIVE,
SWITCH_ONCE
};
/** Type of decomposition */
DecompositionTypeEnum decomposition_type_;
};
} // namespace Ipopt
#endif