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Teko_IdentityPreconditionerFactory.cpp
1/*
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5//
6// Teko: A package for block and physics based preconditioning
7// Copyright 2010 Sandia Corporation
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9// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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45*/
46
47#include "Teko_IdentityPreconditionerFactory.hpp"
48
49#include "Thyra_DefaultIdentityLinearOp.hpp"
50#include "Thyra_DefaultScaledAdjointLinearOp.hpp"
51
52using Teuchos::rcp;
53
54namespace Teko {
55
59 : scaling_(1.0)
60{ }
61
63{
64 return Thyra::scale(scaling_,Thyra::identity(rangeSpace(lo)));
65}
66
69{
70 Teko_DEBUG_SCOPE("IdentityPreconditionerFactory::initializeFromParameterList",10);
71 Teko_DEBUG_MSG_BEGIN(9);
72 DEBUG_STREAM << "Parameter list: " << std::endl;
73 pl.print(DEBUG_STREAM);
74 Teko_DEBUG_MSG_END();
75
76 // get string specifying default inverse
77 std::string scaleStr ="Scaling";
78 if(pl.isParameter(scaleStr))
79 scaling_ = pl.get<double>(scaleStr);
80}
81
82} // end namspace Teko
VectorSpace rangeSpace(const LinearOp &lo)
Replace nonzeros with a scalar value, used to zero out an operator.
LinearOp buildPreconditionerOperator(LinearOp &lo, PreconditionerState &state) const
Create the Identity preconditioner operator.
virtual void initializeFromParameterList(const Teuchos::ParameterList &pl)
Initialize from a parameter list.
An implementation of a state object preconditioners.