Teko  Version of the Day
 All Classes Files Functions Variables Pages
Teko_IdentityPreconditionerFactory.cpp
1 /*
2 // @HEADER
3 //
4 // ***********************************************************************
5 //
6 // Teko: A package for block and physics based preconditioning
7 // Copyright 2010 Sandia Corporation
8 //
9 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
10 // the U.S. Government retains certain rights in this software.
11 //
12 // Redistribution and use in source and binary forms, with or without
13 // modification, are permitted provided that the following conditions are
14 // met:
15 //
16 // 1. Redistributions of source code must retain the above copyright
17 // notice, this list of conditions and the following disclaimer.
18 //
19 // 2. Redistributions in binary form must reproduce the above copyright
20 // notice, this list of conditions and the following disclaimer in the
21 // documentation and/or other materials provided with the distribution.
22 //
23 // 3. Neither the name of the Corporation nor the names of the
24 // contributors may be used to endorse or promote products derived from
25 // this software without specific prior written permission.
26 //
27 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
28 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
31 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
34 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 //
39 // Questions? Contact Eric C. Cyr (eccyr@sandia.gov)
40 //
41 // ***********************************************************************
42 //
43 // @HEADER
44 
45 */
46 
47 #include "Teko_IdentityPreconditionerFactory.hpp"
48 
49 #include "Thyra_DefaultIdentityLinearOp.hpp"
50 #include "Thyra_DefaultScaledAdjointLinearOp.hpp"
51 
52 using Teuchos::rcp;
53 
54 namespace Teko {
55 
59  : scaling_(1.0)
60 { }
61 
63 {
64  return Thyra::scale(scaling_,Thyra::identity(rangeSpace(lo)));
65 }
66 
68 void IdentityPreconditionerFactory::initializeFromParameterList(const Teuchos::ParameterList & pl)
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
LinearOp buildPreconditionerOperator(LinearOp &lo, PreconditionerState &state) const
Create the Identity preconditioner operator.
An implementation of a state object preconditioners.
virtual void initializeFromParameterList(const Teuchos::ParameterList &pl)
Initialize from a parameter list.