Teko_StridedEpetraOperator.hpp

/*
// @HEADER
// 
// ***********************************************************************
// 
//      Teko: A package for block and physics based preconditioning
//                  Copyright 2010 Sandia Corporation 
//  
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//  
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//  
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//  
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//  
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission. 
//  
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//  
// Questions? Contact Eric C. Cyr (eccyr@sandia.gov)
// 
// ***********************************************************************
// 
// @HEADER

*/

#ifndef __Teko_StridedEpetraOperator_hpp__
#define __Teko_StridedEpetraOperator_hpp__

// Epetra includes
#include "Epetra_Operator.h"

// Teuchos includes
#include "Teuchos_RCP.hpp"

#include "Thyra_LinearOpBase.hpp"

// Teko includes
#include "Teko_BlockedReordering.hpp"
#include "Teko_EpetraOperatorWrapper.hpp"
#include "Teko_StridedMappingStrategy.hpp"

namespace Teko {
namespace Epetra {

class StridedEpetraOperator : public EpetraOperatorWrapper {
public:
   enum eNormType { Inf, One, Frobenius};

   StridedEpetraOperator(int numVars,const Teuchos::RCP<const Epetra_Operator> & content,
                         const std::string & label="<ANYM>");
   StridedEpetraOperator(const std::vector<int> & vars,const Teuchos::RCP<const Epetra_Operator> & content,
                         const std::string & label="<ANYM>");

   virtual void SetContent(const std::vector<int> & vars,const Teuchos::RCP<const Epetra_Operator> & content);

   virtual void RebuildOps()
   { BuildBlockedOperator(); }

   virtual const Teuchos::RCP<const Epetra_Operator> GetContent() const
   { return fullContent_; }

   // virtual const Teuchos::RCP<Epetra_Operator> GetContent()
   // { return fullContent_; }

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

   void Reorder(const BlockReorderManager & brm);

   void RemoveReording();

   virtual void WriteBlocks(const std::string & prefix) const;

   virtual std::string PrintNorm(const eNormType & nrmType=Frobenius,const char newline='\n');

   // functions overloading Epetra_Operator

   // destructor
   virtual ~StridedEpetraOperator() {}

   // attribute set methods
   
   // don't use transpose...ever!
   virtual int SetUseTranspose(bool /* useTranspose */)
   { return -1; }

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

   virtual double NormInf() const
   { TEUCHOS_ASSERT(false); return 0.0; }

   // attribute access functions
   virtual bool UseTranspose() const { return false; }
   virtual bool HasNormInf() const { return false; }
   virtual const Epetra_Comm & Comm() const { return fullContent_->Comm(); }

   
   #ifndef Teko_DEBUG_OFF
   bool testAgainstFullOperator(int count,double tol) const;
   #endif

protected:
   // gooey center of this shell
   Teuchos::RCP<const Epetra_Operator> fullContent_;
   Teuchos::RCP<StridedMappingStrategy> stridedMapping_;
   Teuchos::RCP<Thyra::LinearOpBase<double> > stridedOperator_;
   Teuchos::RCP<const BlockReorderManager> reorderManager_;

   std::string label_;

   void BuildBlockedOperator();
};

} // end namespace Epetra
} // end namespace Teko

#endif