Teko_IdentityPreconditionerFactory.cpp

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//      Teko: A package for block and physics based preconditioning
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#include "Teko_IdentityPreconditionerFactory.hpp"

#include "Thyra_DefaultIdentityLinearOp.hpp"
#include "Thyra_DefaultScaledAdjointLinearOp.hpp"

using Teuchos::rcp;

namespace Teko {

IdentityPreconditionerFactory::IdentityPreconditionerFactory()
  : scaling_(1.0)
{ }

LinearOp IdentityPreconditionerFactory::buildPreconditionerOperator(LinearOp & lo,PreconditionerState & /* state */) const
{
   return Thyra::scale(scaling_,Thyra::identity(rangeSpace(lo)));
}

void IdentityPreconditionerFactory::initializeFromParameterList(const Teuchos::ParameterList & pl)
{
   Teko_DEBUG_SCOPE("IdentityPreconditionerFactory::initializeFromParameterList",10);
   Teko_DEBUG_MSG_BEGIN(9);
      DEBUG_STREAM << "Parameter list: " << std::endl;
      pl.print(DEBUG_STREAM);
   Teko_DEBUG_MSG_END();

   // get string specifying default inverse
   std::string scaleStr ="Scaling"; 
   if(pl.isParameter(scaleStr))
      scaling_ = pl.get<double>(scaleStr);
}

} // end namspace Teko