Teko_BlockInvDiagonalStrategy.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_BlockInvDiagonalStrategy_hpp__
#define __Teko_BlockInvDiagonalStrategy_hpp__

#include <vector>

// Teuchos includes
#include "Teuchos_RCP.hpp"

// Thyra includes
#include "Thyra_LinearOpBase.hpp"

// Teko includes
#include "Teko_Utilities.hpp"
#include "Teko_InverseFactory.hpp"
#include "Teko_BlockPreconditionerFactory.hpp"

namespace Teko {

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

   virtual void getInvD(const BlockedLinearOp & A,BlockPreconditionerState & state,
                        std::vector<LinearOp> & invDiag) const = 0;

};

class StaticInvDiagStrategy : public BlockInvDiagonalStrategy {
public:
   StaticInvDiagStrategy(const LinearOp & invD0,
                          const LinearOp & invD1)
   { invDiag_.push_back(invD0); invDiag_.push_back(invD1); }

   StaticInvDiagStrategy(const std::vector<LinearOp> & invD)
      : invDiag_(invD)
   { }

   virtual ~StaticInvDiagStrategy() {}

   virtual void getInvD(const BlockedLinearOp & /* A */, BlockPreconditionerState & /* state */,
                        std::vector<LinearOp> & invDiag) const
   { invDiag.clear(); invDiag = invDiag_; }

protected:
   // stored inverse operators
   std::vector<Teuchos::RCP<const Thyra::LinearOpBase<double> > > invDiag_;
};

class InvFactoryDiagStrategy : public BlockInvDiagonalStrategy {
public:
   InvFactoryDiagStrategy(const Teuchos::RCP<InverseFactory> & factory);

   InvFactoryDiagStrategy(const std::vector<Teuchos::RCP<InverseFactory> > & factories,
                          const Teuchos::RCP<InverseFactory> & defaultFact=Teuchos::null);

   virtual ~InvFactoryDiagStrategy() {}

   virtual void getInvD(const BlockedLinearOp & A, BlockPreconditionerState & state,
                        std::vector<LinearOp> & invDiag) const;

   const std::vector<Teuchos::RCP<InverseFactory> > & getFactories() const
   { return invDiagFact_; }

protected:
   // stored inverse operators
   std::vector<Teuchos::RCP<InverseFactory> > invDiagFact_;
   Teuchos::RCP<InverseFactory> defaultInvFact_;

   LinearOp buildInverse(const InverseFactory & invFact,const LinearOp & matrix,
                         BlockPreconditionerState & state,
                         const std::string & opPrefix,int i) const;

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

} // end namespace Teko

#endif