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// ***********************************************************************
//
// EpetraExt: Epetra Extended - Linear Algebra Services Package
// Copyright (2011) Sandia Corporation
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//@HEADER
#ifndef EPETRAEXT_BLOCKMULTIVECTOR_H
#define EPETRAEXT_BLOCKMULTIVECTOR_H
#include "Epetra_MultiVector.h"
#include "Teuchos_RCP.hpp"
#include <vector>
//! EpetraExt::BlockMultiVector: A class for constructing a distributed block multivector
/*! The EpetraExt::BlockMultiVector allows construction of a block multivector made up of Epetra_MultiVector blocks as well as access to the full systems as a Epetra_MultiVector. It derives from and extends the Epetra_MultiVector class
<b>Constructing EpetraExt::BlockMultiVector objects</b>
*/
namespace EpetraExt {
class BlockMultiVector: public Epetra_MultiVector {
public:
//@{ \name Constructors/Destructor.
//! BlockMultiVector constuctor with one block row per processor.
/*! Creates a BlockMultiVector object and allocates storage.
\param In
BaseMap - Map determining local structure, can be distrib. over subset of proc.'s
\param In
GlobalMap - Full map describing the overall global structure, generally generated by the construction of a BlockCrsMatrix object
\param In
NumVectors - Number of vectors in object
*/
BlockMultiVector( const Epetra_BlockMap & BaseMap, const Epetra_BlockMap & GlobalMap,
int NumVectors );
/*! Creates a BlockMultiVector object from an existing Epetra_MultiVector.
\param In
Epetra_DataAccess - Enumerated type set to Copy or View.
\param In
BaseMap - Map determining local structure, can be distrib. over subset of proc.'s
\param In
BlockVec - Source Epetra multi vector whose map must be the full map for the block multi vector
*/
BlockMultiVector(Epetra_DataAccess CV, const Epetra_BlockMap & BaseMap,
const Epetra_MultiVector & BlockVec);
//! Copy constructor.
BlockMultiVector( const BlockMultiVector & MV );
//! Destructor
virtual ~BlockMultiVector();
//@}
//! Extract a single block from a Block Vector: block row is global, not a stencil value
int ExtractBlockValues( Epetra_MultiVector & BaseVec, long long BlockRow) const;
//! Load a single block into a Block Vector: block row is global, not a stencil value
int LoadBlockValues(const Epetra_MultiVector & BaseVec, long long BlockRow);
//! Return Epetra_MultiVector for given block row
Teuchos::RCP<const Epetra_MultiVector> GetBlock(long long BlockRow) const;
//! Return Epetra_MultiVector for given block row
Teuchos::RCP<Epetra_MultiVector> GetBlock(long long BlockRow);
//! Return base map
const Epetra_BlockMap& GetBaseMap() const;
protected:
Epetra_BlockMap BaseMap_;
long long Offset_;
};
} //namespace EpetraExt
#endif /* EPETRAEXT_BLOCKMULTIVECTOR_H */
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