// @HEADER
// ***********************************************************************
// 
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
// 
// ***********************************************************************
// @HEADER

#ifndef SPARSE_LINALG_PACK_MATRIX_DIAGONAL_SPARSE_STD_H
#define SPARSE_LINALG_PACK_MATRIX_DIAGONAL_SPARSE_STD_H

#include "AbstractLinAlgPack_MatrixSymDiagSparse.hpp"
#include "AbstractLinAlgPack_SpVectorClass.hpp"

namespace AbstractLinAlgPack {

/** \brief Concrete subclass for a serial symmetric diagonal matrix with many zeros on the diagonal.
  *
  * The underlying diagonal vector is sorted and determines the dimensions of the
  * matrix.
  *
  * The default constructor, copy constructor are allowed.
  */
class MatrixSymDiagSparseStd: virtual public MatrixSymDiagSparse {
public:

  /** @name Constructors/initializes */
  //@{

  /// Construct uninitialized
  MatrixSymDiagSparseStd()
  {}

  /** \brief Construct the diagonal.
    */
  MatrixSymDiagSparseStd( const SpVectorSlice& diag );

  /** \brief Reinitialize the diagonal.
    */
  void initialize( const SpVectorSlice& diag );

  //@}

  /** @name Overridden from MatrixOp */
  //@{

  /** \brief . */
  MatrixOp& operator=(const MatrixOp& m);

  //@}

  /** Overridden from MatrixDiagonalSparse */
  //@{

  /** \brief . */
  const SpVectorSlice diag() const;

  //@}

private:
  
  SpVector	diag_;

};	// end class MatrixDiagonalSparse

}	// end namespace AbstractLinAlgPack

#endif	// SPARSE_LINALG_PACK_MATRIX_DIAGONAL_SPARSE_STD_H
