EpetraExt Package Browser (Single Doxygen Collection) Development
Loading...
Searching...
No Matches
EpetraExt_Reindex_LinearProblem2.cpp
Go to the documentation of this file.
1//@HEADER
2// ***********************************************************************
3//
4// EpetraExt: Epetra Extended - Linear Algebra Services Package
5// Copyright (2011) Sandia Corporation
6//
7// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
8// the U.S. Government retains certain rights in this software.
9//
10// Redistribution and use in source and binary forms, with or without
11// modification, are permitted provided that the following conditions are
12// met:
13//
14// 1. Redistributions of source code must retain the above copyright
15// notice, this list of conditions and the following disclaimer.
16//
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// 3. Neither the name of the Corporation nor the names of the
22// contributors may be used to endorse or promote products derived from
23// this software without specific prior written permission.
24//
25// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
26// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
29// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36//
37// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
38//
39// ***********************************************************************
40//@HEADER
41
43
46
48#include <Epetra_CrsMatrix.h>
49#include <Epetra_MultiVector.h>
50#include <Epetra_Map.h>
51
52namespace EpetraExt {
53
56{
57 if( newObj_ ) delete newObj_;
58
59 if( MatTrans_ ) delete MatTrans_;
60 if( LHSTrans_ ) delete LHSTrans_;
61 if( RHSTrans_ ) delete RHSTrans_;
62
63 if( NewRowMapOwned_ ) delete NewRowMap_;
64}
65
68operator()( OriginalTypeRef orig )
69{
70 // Save original object
71 origObj_ = &orig;
72
73 Epetra_CrsMatrix * OldMatrix = dynamic_cast<Epetra_CrsMatrix*>( orig.GetMatrix() );
74 Epetra_MultiVector * OldRHS = orig.GetRHS();
75 Epetra_MultiVector * OldLHS = orig.GetLHS();
76 const Epetra_BlockMap & OldRowMap = OldMatrix->Map();
77
78 //If new map not passed in create one with lex ordering
79 if( !NewRowMap_ )
80 {
81 int NumMyElements = OldRowMap.NumMyElements();
82
83#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
84 if(OldRowMap.GlobalIndicesInt()) {
85 int NumGlobalElements = OldRowMap.NumGlobalElements();
86 NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0, OldRowMap.Comm() );
87 }
88 else
89#endif
90#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
91 if(OldRowMap.GlobalIndicesLongLong()) {
92 long long NumGlobalElements = OldRowMap.NumGlobalElements64();
93 NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0LL, OldRowMap.Comm() );
94 }
95 else
96#endif
97 throw "LinearProblem_Reindex2::operator(): GlobalIndices type unknown";
98 NewRowMapOwned_ = true;
99 }
100
104
105 Epetra_CrsMatrix * NewMatrix = &((*MatTrans_)( *OldMatrix ));
106 Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
107 Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
108
109 newObj_ = new Epetra_LinearProblem( NewMatrix, NewLHS, NewRHS );
110
111 return *newObj_;
112}
113
115{
116 Epetra_MultiVector * OldRHS = origObj_->GetRHS();
117 Epetra_MultiVector * OldLHS = origObj_->GetLHS();
118
119 // Clean up x and b before creating new multivectors
120 delete (newObj_->GetLHS());
121 delete (newObj_->GetRHS());
122
123 // Create new multivectors that view into the current LHS / RHS
124 Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
125 Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
126
127 // Set the new LHS / RHS
128 newObj_->SetLHS( NewLHS );
129 newObj_->SetRHS( NewRHS );
130
131 return true;
132}
133
134} //namespace EpetraExt
135
Given an Epetra_CrsMatrix, a "reindexed" version is returned based on the new row map.
bool fwd()
Forward transfer of data from orig object input in the operator() method call to the new object creat...
NewTypeRef operator()(OriginalTypeRef orig)
Constructs a new view the original LP, "reindexed" using the given NewRowMap.
Given an input Epetra_MultiVector, a "reindexed" view is returned.
long long NumGlobalElements64() const
bool GlobalIndicesInt() const
int NumGlobalElements() const
const Epetra_Comm & Comm() const
int NumMyElements() const
bool GlobalIndicesLongLong() const
const Epetra_BlockMap & Map() const
EpetraExt::BlockCrsMatrix: A class for constructing a distributed block matrix.