Teko Version of the Day
Teko_BlockInvDiagonalStrategy.cpp
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00006 //      Teko: A package for block and physics based preconditioning
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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    if(diagCnt<=invCnt) {
00083       for(int i=0;i<diagCnt;i++) 
00084          invDiag.push_back(buildInverse(*invDiagFact_[i],getBlock(i,i,A)));
00085    }
00086    else {
00087       for(int i=0;i<invCnt;i++) 
00088          invDiag.push_back(buildInverse(*invDiagFact_[i],getBlock(i,i,A)));
00089 
00090       for(int i=invCnt;i<diagCnt;i++) 
00091          invDiag.push_back(buildInverse(*defaultInvFact_,getBlock(i,i,A)));
00092    }
00093 }
00094 
00095 } // end namespace Teko
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