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.
//
// $Id: IpDiagMatrix.hpp 1861 2010-12-21 21:34:47Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13
 
#ifndef __IPDIAGMATRIX_HPP__
#define __IPDIAGMATRIX_HPP__
 
#include "IpUtils.hpp"
#include "IpSymMatrix.hpp"
 
namespace Ipopt
{
 
  class 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 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