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Teko_JacobiPreconditionerFactory.cpp
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00006 //      Teko: A package for block and physics based preconditioning
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00045 */
00046 
00047 #include "Teko_JacobiPreconditionerFactory.hpp"
00048 
00049 using Teuchos::rcp;
00050 
00051 namespace Teko {
00052 
00053 JacobiPreconditionerFactory::JacobiPreconditionerFactory(const LinearOp & invD0,const LinearOp & invD1)
00054       : invOpsStrategy_(rcp(new StaticInvDiagStrategy(invD0,invD1)))
00055 { }
00056 
00057 JacobiPreconditionerFactory::JacobiPreconditionerFactory(const RCP<const BlockInvDiagonalStrategy> & strategy)
00058          : invOpsStrategy_(strategy)
00059 { }
00060 
00063 JacobiPreconditionerFactory::JacobiPreconditionerFactory()
00064 { }
00065 
00066 LinearOp JacobiPreconditionerFactory::buildPreconditionerOperator(BlockedLinearOp & blo,BlockPreconditionerState & state) const
00067 {
00068    int rows = blo->productRange()->numBlocks();
00069    int cols = blo->productDomain()->numBlocks();
00070  
00071    TEUCHOS_ASSERT(rows==cols);
00072 
00073    // get diagonal blocks
00074    std::vector<LinearOp> invDiag;
00075    invOpsStrategy_->getInvD(blo,state,invDiag);
00076    TEUCHOS_ASSERT(rows==(int) invDiag.size());
00077 
00078    // create a blocked linear operator
00079    BlockedLinearOp precond = createBlockedOp();
00080    std::stringstream ss;
00081    ss << "Jacobi Preconditioner ( ";
00082 
00083    // start filling the blocked operator
00084    beginBlockFill(precond,rows,rows); // this is assuming the matrix is square
00085 
00086    // build blocked diagonal matrix
00087    for(int i=0;i<rows;i++) {
00088       ss << " op" << i << " = " << invDiag[i]->description() << ", ";
00089       precond->setBlock(i,i,invDiag[i]);
00090    }
00091    ss << " )";
00092    
00093    endBlockFill(precond);
00094    // done filling the blocked operator
00095 
00096    // precond->setObjectLabel(ss.str());
00097    precond->setObjectLabel("Jacobi");
00098    
00099    return precond; 
00100 }
00101 
00103 void JacobiPreconditionerFactory::initializeFromParameterList(const Teuchos::ParameterList & pl)
00104 {
00105    RCP<const InverseLibrary> invLib = getInverseLibrary();
00106 
00107    // get string specifying inverse
00108    std::string invStr = pl.get<std::string>("Inverse Type");
00109    if(invStr=="") invStr = "Amesos";
00110 
00111    // based on parameter type build a strategy
00112    invOpsStrategy_ = rcp(new InvFactoryDiagStrategy(invLib->getInverseFactory(invStr)));
00113 }
00114 
00115 } // end namspace Teko
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