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Teko_BlockedEpetraOperator.cpp
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46 
47 #include "Teko_BlockedEpetraOperator.hpp"
48 #include "Teko_BlockedMappingStrategy.hpp"
49 #include "Teko_ReorderedMappingStrategy.hpp"
50 
51 #include "Teuchos_VerboseObject.hpp"
52 
53 #include "Thyra_LinearOpBase.hpp"
54 #include "Thyra_EpetraLinearOp.hpp"
55 #include "Thyra_EpetraThyraWrappers.hpp"
56 #include "Thyra_DefaultProductMultiVector.hpp"
57 #include "Thyra_DefaultProductVectorSpace.hpp"
58 #include "Thyra_DefaultBlockedLinearOp.hpp"
59 #include "Thyra_get_Epetra_Operator.hpp"
60 
61 #include "EpetraExt_MultiVectorOut.h"
62 #include "EpetraExt_RowMatrixOut.h"
63 
64 #include "Teko_Utilities.hpp"
65 
66 namespace Teko {
67 namespace Epetra {
68 
69 using Teuchos::RCP;
70 using Teuchos::rcp;
71 using Teuchos::rcp_dynamic_cast;
72 
73 BlockedEpetraOperator::BlockedEpetraOperator(const std::vector<std::vector<int> > & vars,
74  const Teuchos::RCP<const Epetra_Operator> & content,
75  const std::string & label)
76  : Teko::Epetra::EpetraOperatorWrapper(), label_(label)
77 {
78  SetContent(vars,content);
79 }
80 
81 void BlockedEpetraOperator::SetContent(const std::vector<std::vector<int> > & vars,
82  const Teuchos::RCP<const Epetra_Operator> & content)
83 {
84  fullContent_ = content;
85  blockedMapping_ = rcp(new BlockedMappingStrategy(vars,Teuchos::rcpFromRef(fullContent_->OperatorDomainMap()),
86  fullContent_->Comm()));
87  SetMapStrategy(blockedMapping_);
88 
89  // build thyra operator
90  BuildBlockedOperator();
91 }
92 
93 void BlockedEpetraOperator::BuildBlockedOperator()
94 {
95  TEUCHOS_ASSERT(blockedMapping_!=Teuchos::null);
96 
97  // get a CRS matrix
98  const RCP<const Epetra_CrsMatrix> crsContent
99  = rcp_dynamic_cast<const Epetra_CrsMatrix>(fullContent_);
100 
101  // ask the strategy to build the Thyra operator for you
102  if(blockedOperator_==Teuchos::null) {
103  blockedOperator_ = blockedMapping_->buildBlockedThyraOp(crsContent,label_);
104  }
105  else {
106  const RCP<Thyra::BlockedLinearOpBase<double> > blkOp
107  = rcp_dynamic_cast<Thyra::BlockedLinearOpBase<double> >(blockedOperator_,true);
108  blockedMapping_->rebuildBlockedThyraOp(crsContent,blkOp);
109  }
110 
111  // set whatever is returned
112  SetOperator(blockedOperator_,false);
113 
114  // reorder if neccessary
115  if(reorderManager_!=Teuchos::null)
116  Reorder(*reorderManager_);
117 }
118 
119 const Teuchos::RCP<const Epetra_Operator> BlockedEpetraOperator::GetBlock(int i,int j) const
120 {
121  const RCP<const Thyra::BlockedLinearOpBase<double> > blkOp
122  = Teuchos::rcp_dynamic_cast<const Thyra::BlockedLinearOpBase<double> >(getThyraOp());
123 
124  return Thyra::get_Epetra_Operator(*blkOp->getBlock(i,j));
125 }
126 
131 {
132  reorderManager_ = rcp(new BlockReorderManager(brm));
133 
134  // build reordered objects
135  RCP<const MappingStrategy> reorderMapping = rcp(new ReorderedMappingStrategy(*reorderManager_,blockedMapping_));
136  RCP<const Thyra::BlockedLinearOpBase<double> > blockOp
137  = rcp_dynamic_cast<const Thyra::BlockedLinearOpBase<double> >(blockedOperator_);
138 
139  RCP<const Thyra::LinearOpBase<double> > A = buildReorderedLinearOp(*reorderManager_,blockOp);
140 
141  // set them as working values
142  SetMapStrategy(reorderMapping);
143  SetOperator(A,false);
144 }
145 
148 {
149  SetMapStrategy(blockedMapping_);
150  SetOperator(blockedOperator_,false);
151  reorderManager_ = Teuchos::null;
152 }
153 
156 void BlockedEpetraOperator::WriteBlocks(const std::string & prefix) const
157 {
158  RCP<Thyra::PhysicallyBlockedLinearOpBase<double> > blockOp
159  = rcp_dynamic_cast<Thyra::PhysicallyBlockedLinearOpBase<double> >(blockedOperator_);
160 
161  // get size of blocked block operator
162  int rows = Teko::blockRowCount(blockOp);
163 
164  for(int i=0;i<rows;i++) {
165  for(int j=0;j<rows;j++) {
166  // build the file name
167  std::stringstream ss;
168  ss << prefix << "_" << i << j << ".mm";
169 
170  // get the row matrix object
171  RCP<const Epetra_RowMatrix> mat
172  = Teuchos::rcp_dynamic_cast<const Epetra_RowMatrix>(Thyra::get_Epetra_Operator(*blockOp->getBlock(i,j)));
173 
174  // write to file
175  EpetraExt::RowMatrixToMatrixMarketFile(ss.str().c_str(),*mat);
176  }
177  }
178 }
179 
180 #ifndef Teko_DEBUG_OFF
181 bool BlockedEpetraOperator::testAgainstFullOperator(int count,double tol) const
182 {
183  Epetra_Vector xf(OperatorRangeMap());
184  Epetra_Vector xs(OperatorRangeMap());
185  Epetra_Vector y(OperatorDomainMap());
186 
187  // test operator many times
188  bool result = true;
189  double diffNorm=0.0,trueNorm=0.0;
190  for(int i=0;i<count;i++) {
191  xf.PutScalar(0.0);
192  xs.PutScalar(0.0);
193  y.Random();
194 
195  // apply operator
196  Apply(y,xs); // xs = A*y
197  fullContent_->Apply(y,xf); // xf = A*y
198 
199  // compute norms
200  xs.Update(-1.0,xf,1.0);
201  xs.Norm2(&diffNorm);
202  xf.Norm2(&trueNorm);
203 
204  // check result
205  result &= (diffNorm/trueNorm < tol);
206  }
207 
208  return result;
209 }
210 #endif
211 
212 } // end namespace Epetra
213 } // end namespace Teko
bool testAgainstFullOperator(int count, double tol) const
Helps perform sanity checks.
Class that describes how a flat blocked operator should be reordered.
void Reorder(const BlockReorderManager &brm)
Implements the Epetra_Operator interface with a Thyra LinearOperator. This enables the use of absrtac...
virtual void SetContent(const std::vector< std::vector< int > > &vars, const Teuchos::RCP< const Epetra_Operator > &content)
void RemoveReording()
Remove any reordering on this object.
BlockedEpetraOperator(const std::vector< std::vector< int > > &vars, const Teuchos::RCP< const Epetra_Operator > &content, const std::string &label="<ANYM>")
const RCP< const Thyra::LinearOpBase< double > > getThyraOp() const
Return the thyra operator associated with this wrapper.
virtual void WriteBlocks(const std::string &prefix) const