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// ***********************************************************************
//
// 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.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov)
//
// ***********************************************************************
// @HEADER
#ifndef ABSTRACT_LINALG_PACK_MATRIX_BASE_H
#define ABSTRACT_LINALG_PACK_MATRIX_BASE_H
#include <stdexcept>
#include "AbstractLinAlgPack_Types.hpp"
namespace AbstractLinAlgPack {
/** \brief Base class for all polymorphic matrices.
*/
class MatrixBase {
public:
/// Thrown if matrices are incompatible
class IncompatibleMatrices : public std::logic_error
{public: IncompatibleMatrices(const std::string& what_arg) : std::logic_error(what_arg) {}};
/// Virtual destructor
virtual ~MatrixBase() {}
/** @name Vector spaces for the columns and rows of the matrix */
//@{
/// Vector space for vectors that are compatible with the columns of the matrix.
virtual const VectorSpace& space_cols() const = 0;
/// Vector space for vectors that are compatible with the rows of the matrix.
virtual const VectorSpace& space_rows() const = 0;
//@}
/** @name Dimensionality */
//@{
/** \brief Return the number of rows in the matrix.
*
* The default implementation returns <tt>space_cols().dim()</tt>.
*/
virtual size_type rows() const;
/** \brief Return the number of columns in the matrix.
*
* The default implementation returns <tt>space_rows().dim()</tt>.
*/
virtual size_type cols() const;
/** \brief Return the number of nonzero elements in the matrix.
*
* The default is to just assume it is dense and to return
* <tt>rows() * cols()</tt>.
*/
virtual size_type nz() const;
//@}
}; // end class MatrixBase
} // end namespace AbstractLinAlgPack
#endif // ABSTRACT_LINALG_PACK_MATRIX_BASE_H
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