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// Copyright (C) 2004, 2008 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// $Id: IpIdentityMatrix.hpp 2269 2013-05-05 11:32:40Z stefan $
//
// Authors: Carl Laird, Andreas Waechter IBM 2004-08-13
#ifndef __IPIDENTITYMATRIX_HPP__
#define __IPIDENTITYMATRIX_HPP__
#include "IpUtils.hpp"
#include "IpSymMatrix.hpp"
namespace Ipopt
{
/** Class for Matrices which are multiples of the identity matrix.
*
*/
class IdentityMatrix : public SymMatrix
{
public:
/**@name Constructors / Destructors */
//@{
/** Constructor, initializing with dimensions of the matrix
* (true identity matrix).
*/
IdentityMatrix(const SymMatrixSpace* owner_space);
/** Destructor */
~IdentityMatrix();
//@}
/** Method for setting the factor for the identity matrix. */
void SetFactor(Number factor)
{
factor_ = factor;
}
/** Method for getting the factor for the identity matrix. */
Number GetFactor() const
{
return factor_;
}
/** Method for obtaining the dimention of the matrix. */
Index Dim() const;
protected:
/**@name Methods overloaded from matrix */
//@{
virtual void MultVectorImpl(Number alpha, const Vector& x,
Number beta, Vector& y) const;
virtual void AddMSinvZImpl(Number alpha, const Vector& S,
const Vector& Z, Vector& X) const;
/** Method for determining if all stored numbers are valid (i.e.,
* no Inf or Nan). */
virtual bool HasValidNumbersImpl() const;
virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const;
virtual void PrintImpl(const Journalist& jnlst,
EJournalLevel level,
EJournalCategory category,
const std::string& name,
Index indent,
const std::string& prefix) const;
//@}
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 */
IdentityMatrix();
/** Copy Constructor */
IdentityMatrix(const IdentityMatrix&);
/** Overloaded Equals Operator */
void operator=(const IdentityMatrix&);
//@}
/** Scaling factor for this identity matrix */
Number factor_;
};
/** This is the matrix space for IdentityMatrix. */
class IdentityMatrixSpace : public SymMatrixSpace
{
public:
/** @name Constructors / Destructors */
//@{
/** Constructor, given the dimension of the matrix. */
IdentityMatrixSpace(Index dim)
:
SymMatrixSpace(dim)
{}
/** Destructor */
virtual ~IdentityMatrixSpace()
{}
//@}
/** Overloaded MakeNew method for the SymMatrixSpace base class.
*/
virtual SymMatrix* MakeNewSymMatrix() const
{
return MakeNewIdentityMatrix();
}
/** Method for creating a new matrix of this specific type. */
IdentityMatrix* MakeNewIdentityMatrix() const
{
return new IdentityMatrix(this);
}
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 */
IdentityMatrixSpace();
/** Copy Constructor */
IdentityMatrixSpace(const IdentityMatrixSpace&);
/** Overloaded Equals Operator */
void operator=(const IdentityMatrixSpace&);
//@}
};
} // namespace Ipopt
#endif
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