Teko  Version of the Day
Teko_BlockImplicitLinearOp.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_BlockImplicitLinearOp.hpp"
48 
49 namespace Teko {
50 
51 using Teuchos::rcpFromRef;
52 using Teuchos::rcp_dynamic_cast;
53 using Teuchos::rcp_const_cast;
54 using Teuchos::RCP;
55 
56 using Thyra::ProductMultiVectorBase;
57 
58 bool BlockImplicitLinearOp::opSupportedImpl(const Thyra::EOpTransp M_trans) const
59 {
60  return (M_trans == Thyra::NOTRANS);
61 }
62 
63 void BlockImplicitLinearOp::applyImpl(
64  const Thyra::EOpTransp M_trans,
65  const Thyra::MultiVectorBase<double> & x,
66  const Teuchos::Ptr<Thyra::MultiVectorBase<double> > & y,
67  const double alpha,
68  const double beta
69  ) const
70 {
71  TEUCHOS_TEST_FOR_EXCEPTION(M_trans!=Thyra::NOTRANS, std::runtime_error,
72  "Linear operators of inherited type BlockImplicitLinearOp "
73  "cannot handle conjugation (yet!)");
74 
75  // cast source vector
76  RCP<const ProductMultiVectorBase<double> > src =
77  rcp_dynamic_cast<const ProductMultiVectorBase<double> >(rcpFromRef(x));
78  BlockedMultiVector srcX = rcp_const_cast<ProductMultiVectorBase<double> >(src);
79 
80  // cast destination vector
81  BlockedMultiVector destY =
82  rcp_dynamic_cast<ProductMultiVectorBase<double> >(rcpFromPtr(y));
83 
84  // call apply
85  implicitApply(srcX,destY,alpha,beta);
86 }
87 
88 } // end namespace Teko
virtual void implicitApply(const BlockedMultiVector &x, BlockedMultiVector &y, const double alpha=1.0, const double beta=0.0) const =0
Perform a matrix vector multiply with this implicitly defined blocked operator.
virtual bool opSupportedImpl(const Thyra::EOpTransp M_trans) const
Functions required by Thyra::LinearOpBase.