IpZeroMatrix.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 __IPZEROMATRIX_HPP__
#define __IPZEROMATRIX_HPP__
 
#include "IpUtils.hpp"
#include "IpMatrix.hpp"
 
namespace Ipopt
{
 
class ZeroMatrix: public Matrix
{
public:
 
   ZeroMatrix(
      const MatrixSpace* owner_space
   );
 
   ~ZeroMatrix();
 
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:
 
   ZeroMatrix();
 
   ZeroMatrix(
      const ZeroMatrix&
   );
 
   void operator=(
      const ZeroMatrix&
   );
};
 
class ZeroMatrixSpace: public MatrixSpace
{
public:
 
   ZeroMatrixSpace(
      Index nrows,
      Index ncols
   )
      : MatrixSpace(nrows, ncols)
   { }
 
   virtual ~ZeroMatrixSpace()
   { }
 
   virtual Matrix* MakeNew() const
   {
      return MakeNewZeroMatrix();
   }
 
   ZeroMatrix* MakeNewZeroMatrix() const
   {
      return new ZeroMatrix(this);
   }
 
private:
 
   ZeroMatrixSpace();
 
   ZeroMatrixSpace(
      const ZeroMatrixSpace&
   );
 
   void operator=(
      const ZeroMatrixSpace&
   );
};
} // namespace Ipopt
#endif