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// Copyright (C) 2004, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpExpansionMatrix.hpp 735 2006-06-04 06:10:05Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13

#ifndef __IPEXPANSIONMATRIX_HPP__
#define __IPEXPANSIONMATRIX_HPP__

#include "IpUtils.hpp"
#include "IpMatrix.hpp"

namespace Ipopt
{

  class ExpansionMatrixSpace;

  class ExpansionMatrix : public Matrix
  {
  public:


    ExpansionMatrix(const ExpansionMatrixSpace* owner_space);

    ~ExpansionMatrix();

    const Index* ExpandedPosIndices() const;

    const Index* CompressedPosIndices() const;

  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 AddMSinvZImpl(Number alpha, const Vector& S, const Vector& Z,
                               Vector& X) const;

    virtual void SinvBlrmZMTdBrImpl(Number alpha, const Vector& S,
                                    const Vector& R, const Vector& Z,
                                    const Vector& D, Vector& X) const;

    virtual void PrintImpl(const Journalist& jnlst,
                           EJournalLevel level,
                           EJournalCategory category,
                           const std::string& name,
                           Index indent,
                           const std::string& prefix) const;


  private:
    ExpansionMatrix();

    ExpansionMatrix(const ExpansionMatrix&);

    void operator=(const ExpansionMatrix&);

    const ExpansionMatrixSpace* owner_space_;

  };

  class ExpansionMatrixSpace : public MatrixSpace
  {
  public:
    ExpansionMatrixSpace(Index NLargeVec,
                         Index NSmallVec,
                         const Index *ExpPos,
                         const int offset = 0);

    ~ExpansionMatrixSpace()
    {
      delete [] compressed_pos_;
      delete [] expanded_pos_;
    }

    ExpansionMatrix* MakeNewExpansionMatrix() const
    {
      return new ExpansionMatrix(this);
    }

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

    const Index* ExpandedPosIndices() const
    {
      return expanded_pos_;
    }

    const Index* CompressedPosIndices() const
    {
      return compressed_pos_;
    }

  private:
    Index *expanded_pos_;
    Index *compressed_pos_;
  };

  /* inline methods */
  inline
  const Index* ExpansionMatrix::ExpandedPosIndices() const
  {
    return owner_space_->ExpandedPosIndices();
  }

  inline
  const Index* ExpansionMatrix::CompressedPosIndices() const
  {
    return owner_space_->CompressedPosIndices();
  }

} // namespace Ipopt
#endif

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