Teko Version of the Day
Teko_BlockInvDiagonalStrategy.cpp
00001 /*
00002 // @HEADER
00003 // 
00004 // ***********************************************************************
00005 // 
00006 //      Teko: A package for block and physics based preconditioning
00007 //                  Copyright 2010 Sandia Corporation 
00008 //  
00009 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
00010 // the U.S. Government retains certain rights in this software.
00011 //  
00012 // Redistribution and use in source and binary forms, with or without
00013 // modification, are permitted provided that the following conditions are
00014 // met:
00015 //  
00016 // 1. Redistributions of source code must retain the above copyright
00017 // notice, this list of conditions and the following disclaimer.
00018 //  
00019 // 2. Redistributions in binary form must reproduce the above copyright
00020 // notice, this list of conditions and the following disclaimer in the
00021 // documentation and/or other materials provided with the distribution.
00022 //  
00023 // 3. Neither the name of the Corporation nor the names of the
00024 // contributors may be used to endorse or promote products derived from
00025 // this software without specific prior written permission. 
00026 //  
00027 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
00028 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00029 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00030 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
00031 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00032 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00033 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00034 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00035 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
00036 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00037 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00038 //  
00039 // Questions? Contact Eric C. Cyr (eccyr@sandia.gov)
00040 // 
00041 // ***********************************************************************
00042 // 
00043 // @HEADER
00044 
00045 */
00046 
00047 #include "Teko_BlockInvDiagonalStrategy.hpp"
00048 
00049 namespace Teko {
00050 
00051 InvFactoryDiagStrategy::InvFactoryDiagStrategy(const Teuchos::RCP<InverseFactory> & factory)
00052 {
00053    // only one factory to use!
00054    invDiagFact_.resize(1,factory);
00055    defaultInvFact_ = factory;
00056 }
00057 
00058 InvFactoryDiagStrategy::InvFactoryDiagStrategy(const std::vector<Teuchos::RCP<InverseFactory> > & factories,
00059                                                const Teuchos::RCP<InverseFactory> & defaultFact)
00060 {
00061    invDiagFact_ = factories;
00062 
00063    if(defaultFact==Teuchos::null)
00064       defaultInvFact_ = invDiagFact_[0];
00065    else
00066       defaultInvFact_ = defaultFact;
00067 }
00068 
00072 void InvFactoryDiagStrategy::getInvD(const BlockedLinearOp & A,BlockPreconditionerState & state,std::vector<LinearOp> & invDiag) const
00073 { 
00074    Teko_DEBUG_SCOPE("InvFactoryDiagStrategy::getInvD",10);
00075 
00076    // loop over diagonals, build an inverse operator for each
00077    int diagCnt = A->productRange()->numBlocks();
00078    int invCnt = invDiagFact_.size();
00079 
00080    Teko_DEBUG_MSG("# diags = " << diagCnt << ", # inverses = " << invCnt,6);
00081 
00082    const std::string opPrefix = "JacobiDiagOp";
00083    if(diagCnt<=invCnt) {
00084       for(int i=0;i<diagCnt;i++) 
00085          invDiag.push_back(buildInverse(*invDiagFact_[i],getBlock(i,i,A),state,opPrefix,i));
00086    }
00087    else {
00088       for(int i=0;i<invCnt;i++) 
00089          invDiag.push_back(buildInverse(*invDiagFact_[i],getBlock(i,i,A),state,opPrefix,i));
00090 
00091       for(int i=invCnt;i<diagCnt;i++) 
00092          invDiag.push_back(buildInverse(*defaultInvFact_,getBlock(i,i,A),state,opPrefix,i));
00093    }
00094 }
00095 
00096 LinearOp InvFactoryDiagStrategy::buildInverse(const InverseFactory & invFact,const LinearOp & matrix,
00097                                               BlockPreconditionerState & state,
00098                                               const std::string & opPrefix,int i) const
00099 {
00100    std::stringstream ss;
00101    ss << opPrefix << "_" << i;
00102 
00103    ModifiableLinearOp & invOp = state.getModifiableOp(ss.str());
00104    if(invOp==Teuchos::null) 
00105       invOp = Teko::buildInverse(invFact,matrix);
00106    else 
00107       rebuildInverse(invFact,matrix,invOp);
00108  
00109    return invOp;
00110 }
00111 
00112 } // end namespace Teko
 All Classes Files Functions Variables