IpZeroSymMatrix.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: IpZeroSymMatrix.hpp 2269 2013-05-05 11:32:40Z stefan $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13

#ifndef __IPZEROSYMMATRIX_HPP__
#define __IPZEROSYMMATRIX_HPP__

#include "IpUtils.hpp"
#include "IpSymMatrix.hpp"

namespace Ipopt
{

  class ZeroSymMatrix : public SymMatrix
  {
  public:


    ZeroSymMatrix(const SymMatrixSpace* owner_space);

    ~ZeroSymMatrix();

  protected:
    virtual void MultVectorImpl(Number alpha, const Vector& x,
                                Number beta, Vector& y) const;

    virtual void TransMultVectorImpl(Number alpha, const Vector& x,
                                     Number beta, Vector& y) const;

    virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const
      {}

    virtual void ComputeColAMaxImpl(Vector& cols_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:
    ZeroSymMatrix();

    ZeroSymMatrix(const ZeroSymMatrix&);

    void operator=(const ZeroSymMatrix&);
  };

  class ZeroSymMatrixSpace : public SymMatrixSpace
  {
  public:
    ZeroSymMatrixSpace(Index dim)
        :
        SymMatrixSpace(dim)
    {}

    virtual ~ZeroSymMatrixSpace()
    {}

    virtual Matrix* MakeNew() const
    {
      return MakeNewZeroSymMatrix();
    }

    virtual SymMatrix* MakeNewSymMatrix() const
    {
      return MakeNewZeroSymMatrix();
    }

    ZeroSymMatrix* MakeNewZeroSymMatrix() const
    {
      return new ZeroSymMatrix(this);
    }
  private:
    ZeroSymMatrixSpace();

    ZeroSymMatrixSpace(const ZeroSymMatrixSpace&);

    void operator=(const ZeroSymMatrixSpace&);
  };
} // namespace Ipopt
#endif