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// Copyright (C) 2009 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors: Andreas Waechter IBM 2009-11-13
// (based on IpInexactTSymScalingMethod.hpp)
#ifndef __IPSLACKBASEDTSYMSCALINGMETHOD_HPP__
#define __IPSLACKBASEDTSYMSCALINGMETHOD_HPP__
#include "IpUtils.hpp"
#include "IpTSymScalingMethod.hpp"
namespace Ipopt
{
/** Class for the method for computing scaling factors for symmetric
* matrices in triplet format, specifically for the inexact algorithm.
* The scaling is only considering the current slacks.
*/
class SlackBasedTSymScalingMethod: public TSymScalingMethod
{
public:
/** @name Constructor/Destructor */
///@{
SlackBasedTSymScalingMethod()
{ }
virtual ~SlackBasedTSymScalingMethod()
{ }
///@}
virtual bool InitializeImpl(
const OptionsList& options,
const std::string& prefix
);
/** Method for computing the symmetric scaling factors, given the
* symmetric matrix in triplet (MA27) format.
*/
virtual bool ComputeSymTScalingFactors(
Index n,
Index nnz,
const Index* airn,
const Index* ajcn,
const Number* a,
Number* scaling_factors
);
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. */
///@{
/** Copy Constructor */
SlackBasedTSymScalingMethod(
const SlackBasedTSymScalingMethod&
);
/** Default Assignment Operator */
void operator=(
const SlackBasedTSymScalingMethod&
);
};
} // namespace Ipopt
#endif