/*
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//
//               Pliris: Parallel Dense Solver Package
//                 Copyright 2004 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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*/

#ifndef _PLIRIS_H_
#define _PLIRIS_H_


class Epetra_Comm;
class Epetra_BlockMap;
class Epetra_MultiVector;
#include "Epetra_LinearProblem.h"
#include "Epetra_Object.h"
#include "Epetra_Vector.h"
#include "Epetra_SerialDenseVector.h"

//! Pliris: An Obect-Oriented Interface to a Dense LU Solver.
/*! The Pliris class : Provides the functionality to interface to a dense LU
*/


class Pliris {

 public:

  Pliris(Epetra_Vector * A, Epetra_MultiVector * X, Epetra_MultiVector * B);

  //! Pliris Default constructor.

  Pliris ();


  //! Pliris LHS Set
  /*! Associates an already defined Epetra_MultiVector (or Epetra_Vector) as the initial guess
      and location where the solution will be return.
   */
  int SetLHS(Epetra_MultiVector * X);


  //! Pliris RHS Set
  /*! Associates an already defined Epetra_MultiVector (or Epetra_Vector) as the right-hand-side of
      the linear system.
   */

  int SetRHS(Epetra_MultiVector * B);

  //! Pliris Matrix Set
  /*! Associates an already defined  Epetra_Vector as the matrix (column ordered) of
      the linear system.
   */
  int SetMatrix(Epetra_Vector * A);

  //! Pliris Matrix Set
  /*! Associates an already defined  Epetra_SerialDenseVector as the matrix (column ordered) of
      the linear system.
   */
  int SetMatrix(Epetra_SerialDenseVector * A);

  //! Pliris GetDistirbution
  /*! Gives the distribution information that is required by the dense solver
   */

    /*!
     \param nprocs_row(In)   - number of processors for a row
     \param number_of_unknowns(In)  - order of the dense matrix
     \param nrhs(In)  - number of right hand sides
     \param my_rows(Out)  - number of rows of the matrix on this processor
     \param my_cols (Out)  - number of columns of the matrix on this processor
     \param  my_first_row(Out)  - first (global) row number on this processor (array starts at index 1)
     \param  my_first_col (Out)  - first (global) column number on this processor (array starts at index 1)
     \param  my_rhs(Out)  - number of Right hand sides on this processor
     \param my_row(Out)  - row number in processor mesh, 0 to the  number of processors for a column -1
     \param my_col(Out)  - column  number in processor mesh, 0 to the  number of processors for a row -1
    */

  int GetDistribution( int * nprocs_row,
                             int * number_of_unknowns,
                             int * nrhs,
                             int * my_rows,
                             int * my_cols,
                             int * my_first_row,
                             int * my_first_col,
                             int * my_rhs,
                             int * my_row,
                             int * my_col );

  //! Pliris FactorSolve
  /*! Factors and solves the dense matrix
   */

    /*!
     \param A(InOut) --  Epetra Vector that has the matrix and rhs packed( Note: matrix is overwritten)
     \param my_rows(In) --  number of rows of the matrix on this processor
     \param my_cols(In) --  number of columns of the matrix on this processor
     \param matrix_size(In) -- order of the dense matrix
     \param num_procsr(In) --  number of processors for a row
     \param num_rhs(In) --  number of right hand sides
     \param secs(Out) -- factor and solve time in seconds
    */

   int FactorSolve( Epetra_Vector * A,
                    int my_rows,
                    int my_cols,
                    int* matrix_size,
                    int* num_procsr,
                    int* num_rhs,
                    double* secs);

  //! Pliris FactorSolve
  /*! Factors and solves the dense matrix
   */

    /*!
     \param AA(In) --  Epetra Serial Dense Vector that has the matrix and rhs packed
     \param my_rows(In) --  number of rows of the matrix on this processor
     \param my_cols(In) --  number of columns of the matrix on this processor
     \param matrix_size(In) -- order of the dense matrix
     \param num_procsr(In) --  number of processors for a row
     \param num_rhs(In) --  number of right hand sides
     \param secs(Out) -- factor and solve time in seconds
    */

   int FactorSolve( Epetra_SerialDenseVector * AA,
                    int my_rows,
                    int my_cols,
                    int* matrix_size,
                    int* num_procsr,
                    int* num_rhs,
                    double* secs);

  //! Pliris Factor
  /*! Factors the dense matrix
   */

    /*!
     \param A(In) --  Epetra Vector that has the matrix packed
     \param matrix_size(In) -- order of the dense matrix
     \param num_procsr(In) --  number of processors for a row
     \param permute(In) -- permutation matrix
     \param secs(Out) -- factor and solve time in seconds
    */


   int Factor( Epetra_Vector* A,
               int* matrix_size,
               int* num_procsr,
               int* permute,
	       double* secs);


  //! Pliris Solve
  /*! Solves the previously factored dense matrix
   */

    /*!
     \param permute(In) -- permutation matrix
     \param num_rhs(In) -- factor and solve time in seconds
     \ Note that the matrix has been previously factored by Factor
     \ The RHS has been set by SetRHS(Epetra_MultiVector * B)
     \ On output the result is in the RHS
    */

    int Solve(int* permute,
	      int* num_rhs);


  //! Pliris Default Destructor.
  /*! Completely deletes a Pliris object.
  */
  virtual ~Pliris(void);
  //@


  protected:

  double *x_;
  double *a_;
  double *b_;
  int x_LDA_;
  int b_LDA_;

    bool inConstructor_;
    Epetra_MultiVector * X_;
    Epetra_MultiVector * B_;
    Epetra_Vector * A_;
    Epetra_SerialDenseVector * AA_;

};



#endif /* _PLIRIS_H_ */

#if defined(Pliris_SHOW_DEPRECATED_WARNINGS)
#ifdef __GNUC__
#warning "The Pliris package is deprecated"
#endif
#endif

