Zoltan2
Zoltan2_AlgNatural.hpp
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00005 //   Zoltan2: A package of combinatorial algorithms for scientific computing
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00045 #ifndef _ZOLTAN2_ALGNATURAL_HPP_
00046 #define _ZOLTAN2_ALGNATURAL_HPP_
00047 
00048 #include <Zoltan2_Algorithm.hpp>
00049 #include <Zoltan2_IdentifierModel.hpp>
00050 #include <Zoltan2_OrderingSolution.hpp>
00051 
00052 
00053 namespace Zoltan2{
00054 
00059 
00060 template <typename Adapter>
00061 class AlgNatural : public Algorithm<Adapter>
00062 {
00063   public:
00064 
00065   typedef typename Adapter::lno_t lno_t;
00066   typedef typename Adapter::gid_t gid_t;
00067 
00068   AlgNatural()
00069   {
00070   }
00071 
00072   int order(
00073     const RCP<IdentifierModel<Adapter> > &model, 
00074     const RCP<OrderingSolution<gid_t, lno_t> > &solution,
00075     const RCP<Teuchos::ParameterList> &pl,
00076     const RCP<Teuchos::Comm<int> > &comm
00077   ) 
00078   {
00079 
00080     int ierr= 0;
00081 
00082     HELLO;
00083 
00084     // Local permutation only for now.
00085 
00086     // Set identity permutation.
00087     const size_t n = model->getLocalNumIdentifiers();
00088     lno_t *perm;
00089     perm = (lno_t *) (solution->getPermutationRCP().getRawPtr());
00090     if (perm){
00091       for (size_t i=0; i<n; i++){
00092         perm[i] = i;
00093       }
00094     }
00095     else
00096       // TODO: throw exception?
00097       ierr = -1;
00098 
00099     solution->setHavePerm(true);
00100     return ierr;
00101 
00102   }
00103 
00104 };
00105 }
00106 #endif