IpDiagMatrix.hpp

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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.
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13
 
#ifndef __IPDIAGMATRIX_HPP__
#define __IPDIAGMATRIX_HPP__
 
#include "IpUtils.hpp"
#include "IpSymMatrix.hpp"
 
namespace Ipopt
{
 
class IPOPTLIB_EXPORT DiagMatrix: public SymMatrix
{
public:
 
 
   DiagMatrix(
      const SymMatrixSpace* owner_space
   );
 
   ~DiagMatrix();
 
   void SetDiag(
      const Vector& diag
   )
   {
      diag_ = &diag;
   }
 
   SmartPtr<const Vector> GetDiag() const
   {
      return diag_;
   }
 
protected:
   virtual void MultVectorImpl(
      Number        alpha,
      const Vector& x,
      Number        beta,
      Vector&       y
   ) const;
 
   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:
 
   DiagMatrix();
 
   DiagMatrix(
      const DiagMatrix&
   );
 
   void operator=(
      const DiagMatrix&
   );
 
   SmartPtr<const Vector> diag_;
};
 
class IPOPTLIB_EXPORT DiagMatrixSpace: public SymMatrixSpace
{
public:
 
   DiagMatrixSpace(
      Index dim
   )
      : SymMatrixSpace(dim)
   { }
 
   virtual ~DiagMatrixSpace()
   { }
 
   virtual SymMatrix* MakeNewSymMatrix() const
   {
      return MakeNewDiagMatrix();
   }
 
   DiagMatrix* MakeNewDiagMatrix() const
   {
      return new DiagMatrix(this);
   }
 
private:
 
   DiagMatrixSpace();
 
   DiagMatrixSpace(
      const DiagMatrixSpace&
   );
 
   void operator=(
      const DiagMatrixSpace&
   );
 
};
 
} // namespace Ipopt
#endif