Teko_EpetraOperatorWrapper.hpp

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//      Teko: A package for block and physics based preconditioning
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#ifndef __Teko_EpetraOperatorWrapper_hpp__
#define __Teko_EpetraOperatorWrapper_hpp__

#include "Thyra_LinearOpBase.hpp"
#include "Epetra_Map.h"
#include "Epetra_Comm.h"
#include "Epetra_MultiVector.h"
#include "Epetra_Operator.h"

#include <string>


namespace Teko {
namespace Epetra {
  using Teuchos::RCP;

  class EpetraOperatorWrapper;

  class MappingStrategy {
  public:
     virtual ~MappingStrategy() {}

     virtual void copyEpetraIntoThyra(const Epetra_MultiVector& epetraX,
                                      const Teuchos::Ptr<Thyra::MultiVectorBase<double> > & thyraX) const = 0;
                                      // const EpetraOperatorWrapper & eow) const = 0;

     virtual void copyThyraIntoEpetra(const RCP<const Thyra::MultiVectorBase<double> > & thyraX,
                                      Epetra_MultiVector& epetraX) const = 0;
                                      // const EpetraOperatorWrapper & eow) const = 0;

     virtual const RCP<const Epetra_Map> domainMap() const = 0; 

     virtual const RCP<const Epetra_Map> rangeMap() const = 0;

     virtual std::string toString() const = 0;
  };

  class InverseMappingStrategy : public MappingStrategy {
  public:
     InverseMappingStrategy(const RCP<const MappingStrategy> & forward)
        : forwardStrategy_(forward)
     { }

     virtual ~InverseMappingStrategy() {}

     virtual void copyEpetraIntoThyra(const Epetra_MultiVector& epetraX,
                                      const Teuchos::Ptr<Thyra::MultiVectorBase<double> > & thyraX) const
                                      // const EpetraOperatorWrapper & eow) const
     { forwardStrategy_->copyEpetraIntoThyra(epetraX,thyraX); }

     virtual void copyThyraIntoEpetra(const RCP<const Thyra::MultiVectorBase<double> > & thyraX,
                                      Epetra_MultiVector& epetraX) const
                                      // const EpetraOperatorWrapper & eow) const
     { forwardStrategy_->copyThyraIntoEpetra(thyraX,epetraX); }

     virtual const RCP<const Epetra_Map> domainMap() const
     { return forwardStrategy_->rangeMap(); }

     virtual const RCP<const Epetra_Map> rangeMap() const 
     { return forwardStrategy_->domainMap(); }

     virtual std::string toString() const
     { return std::string("InverseMapping(")+forwardStrategy_->toString()+std::string(")"); }
  protected:
     const RCP<const MappingStrategy> forwardStrategy_;

  private:
     InverseMappingStrategy();
     InverseMappingStrategy(const InverseMappingStrategy &);
  };

  class DefaultMappingStrategy : public MappingStrategy {
  public:
     DefaultMappingStrategy(const RCP<const Thyra::LinearOpBase<double> > & thyraOp,const Epetra_Comm & comm);

     virtual ~DefaultMappingStrategy() {}

     virtual void copyEpetraIntoThyra(const Epetra_MultiVector& epetraX,
                                      const Teuchos::Ptr<Thyra::MultiVectorBase<double> > & thyraX) const;
                                      // const EpetraOperatorWrapper & eow) const;

     virtual void copyThyraIntoEpetra(const RCP<const Thyra::MultiVectorBase<double> > & thyraX,
                                      Epetra_MultiVector& epetraX) const;
                                      // const EpetraOperatorWrapper & eow) const;

     virtual const RCP<const Epetra_Map> domainMap() const { return domainMap_; }

     virtual const RCP<const Epetra_Map> rangeMap() const { return rangeMap_; }

     virtual std::string toString() const
     { return std::string("DefaultMappingStrategy"); } 

  protected:
     RCP<const Thyra::VectorSpaceBase<double> > domainSpace_; 
     RCP<const Thyra::VectorSpaceBase<double> > rangeSpace_; 

     RCP<const Epetra_Map> domainMap_; 
     RCP<const Epetra_Map> rangeMap_; 
  };

  class EpetraOperatorWrapper : public Epetra_Operator
  {
  public:
    EpetraOperatorWrapper(const RCP<const Thyra::LinearOpBase<double> > & thyraOp);
    EpetraOperatorWrapper(const RCP<const Thyra::LinearOpBase<double> > & thyraOp,
                          const RCP<const MappingStrategy> & mapStrategy);
    EpetraOperatorWrapper(const RCP<const MappingStrategy> & mapStrategy);
    
    virtual ~EpetraOperatorWrapper() {;}

    int SetUseTranspose(bool UseTranspose) {useTranspose_ = UseTranspose; return 0;}

    int Apply(const Epetra_MultiVector& X, Epetra_MultiVector& Y) const ;

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

    double NormInf() const ;

    const char* Label() const {return label_.c_str();}

    bool UseTranspose() const {return useTranspose_;}

    bool HasNormInf() const {return false;}
    
    const Epetra_Comm & Comm() const {return *comm_;}

    const Epetra_Map& OperatorDomainMap() const {return *mapStrategy_->domainMap();}

    const Epetra_Map& OperatorRangeMap() const {return *mapStrategy_->rangeMap();}

    const RCP<const Thyra::LinearOpBase<double> > getThyraOp() const 
    { return thyraOp_; }

    const RCP<const MappingStrategy> getMapStrategy() const 
    { return mapStrategy_; }

    virtual int GetBlockRowCount();
  
    virtual int GetBlockColCount();

    Teuchos::RCP<const Epetra_Operator> GetBlock(int i,int j) const;

  protected:
    EpetraOperatorWrapper();

    RCP<const Epetra_Comm> getEpetraComm(const Thyra::LinearOpBase<double> & inOp) const;

    void SetOperator(const RCP<const Thyra::LinearOpBase<double> > & thyraOp,bool buildMap=true);

    void SetMapStrategy(const RCP<const MappingStrategy> & mapStrategy)
    { mapStrategy_ = mapStrategy; }

    RCP<const MappingStrategy> mapStrategy_;

    RCP<const Thyra::LinearOpBase<double> > thyraOp_;

    bool useTranspose_;

    RCP<const Epetra_Comm> comm_;

    std::string label_;
  };
} // end namespace Epetra 
} // end namespace Teko

#endif