EpetraExt_BlockDiagMatrix.h

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//     EpetraExt: Epetra Extended - Linear Algebra Services Package
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#ifndef EPETRAEXT_BLOCKDIAGMATRIX_H
#define EPETRAEXT_BLOCKDIAGMATRIX_H

#include "Epetra_BLAS.h"
#include "Epetra_LAPACK.h"
#include "Epetra_DistObject.h"
#include "Epetra_BlockMap.h"
#include "Epetra_Map.h"
#include "Epetra_Operator.h"
#include "Teuchos_ParameterList.hpp"

class Epetra_Comm;


//=========================================================================
class EpetraExt_BlockDiagMatrix : public virtual Epetra_Operator, public Epetra_DistObject,public Epetra_BLAS {

 public:
  EpetraExt_BlockDiagMatrix(const Epetra_BlockMap& Map,bool zero_out=true);


  EpetraExt_BlockDiagMatrix(const EpetraExt_BlockDiagMatrix& Source);

  virtual ~EpetraExt_BlockDiagMatrix();


  EpetraExt_BlockDiagMatrix& operator = (const EpetraExt_BlockDiagMatrix& Source);


  double* operator [] (int index) {return &Values_[DataMap_->FirstPointInElement(index)];}

  const double* operator [] (int index) const {return &Values_[DataMap_->FirstPointInElement(index)];}




  virtual int SetUseTranspose(bool /* useTranspose */){return -1;}

  virtual int SetParameters(Teuchos::ParameterList & List);

  virtual int Compute();





  virtual const char * Label() const{return "EpetraExt::BlockDiagMatrix";}//HAQ

  virtual bool UseTranspose() const {return false;}

  virtual bool HasNormInf() const {return false;}

  virtual const Epetra_Comm & Comm() const {return Map().Comm();}

  virtual const Epetra_Map & OperatorDomainMap() const {return *dynamic_cast<const Epetra_Map*>(&Map());}

  virtual const Epetra_Map & OperatorRangeMap() const {return *dynamic_cast<const Epetra_Map*>(&Map());}

  virtual const Epetra_BlockMap & BlockMap() const {return Map();}

  double* Values() const {return(Values_);}

  int BlockSize(int LID) const {return Map().ElementSize(LID);}

  int DataSize(int LID) const {return DataMap_->ElementSize(LID);}

  bool ConstantBlockSize() const {return Map().ConstantElementSize();}

  int NumMyBlocks() const {return(Map().NumMyElements());}

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  int NumGlobalBlocks() const {return(Map().NumGlobalElements());}
#endif
  long long NumGlobalBlocks64() const {return(Map().NumGlobalElements64());}

  int NumMyUnknowns() const {return(Map().NumMyPoints());}

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  int NumGlobalUnknowns() const {return(Map().NumGlobalPoints());}
#endif
  long long NumGlobalUnknowns64() const {return(Map().NumGlobalPoints64());}

  int NumData() const {return DataMap_->NumMyPoints();}

  int GetApplyMode() {return ApplyMode_;}

  virtual void Print(std::ostream & os) const;






  virtual int Apply(const Epetra_MultiVector& /* X */, Epetra_MultiVector& /* Y */) const {return -1;}


  virtual int ApplyInverse(const Epetra_MultiVector& X, Epetra_MultiVector& Y) const;

  virtual double NormInf() const{return -1;}

  void PutScalar(double value);

  virtual const Epetra_BlockMap & DataMap() const {return *DataMap_;}



private:
  void Allocate();

  int DoCopy(const EpetraExt_BlockDiagMatrix& Source);

  // Routines to implement Epetra_DistObject virtual methods
  // Allows the source and target (\e this) objects to be compared for compatibility, return nonzero if not.
  int CheckSizes(const Epetra_SrcDistObject& Source);
  // Perform ID copies and permutations that are on processor.
  int CopyAndPermute(const Epetra_SrcDistObject& Source,
                     int NumSameIDs,
                     int NumPermuteIDs,
                     int * PermuteToLIDs,
                     int * PermuteFromLIDs,
                     const Epetra_OffsetIndex * Indexor,
                     Epetra_CombineMode CombineMode = Zero);

  // Perform any packing or preparation required for call to DoTransfer().
  int PackAndPrepare(const Epetra_SrcDistObject& Source,
                     int NumExportIDs,
                     int* ExportLIDs,
                     int& LenExports,
                     char*& Exports,
                     int& SizeOfPacket,
                     int* Sizes,
                     bool & VarSizes,
                     Epetra_Distributor& Distor);

  // Perform any unpacking and combining after call to DoTransfer().
  int UnpackAndCombine(const Epetra_SrcDistObject& Source,
                       int NumImportIDs,
                       int* ImportLIDs,
                       int LenImports,
                       char* Imports,
                       int& SizeOfPacket,
                       Epetra_Distributor& Distor,
                       Epetra_CombineMode CombineMode,
                       const Epetra_OffsetIndex * Indexor);

  Epetra_LAPACK LAPACK;
  Teuchos::ParameterList List_;

  bool HasComputed_;

  int ApplyMode_;

  Epetra_BlockMap* DataMap_;

  double *Values_;

  int *Pivots_;

};  /* EPETRAEXT_BLOCKDIAGMATRIX_H */

#endif