Zoltan2_AlgNatural.hpp

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#ifndef _ZOLTAN2_ALGNATURAL_HPP_
#define _ZOLTAN2_ALGNATURAL_HPP_
 
#include <Zoltan2_Algorithm.hpp>
#include <Zoltan2_IdentifierModel.hpp>
#include <Zoltan2_OrderingSolution.hpp>
 
 
namespace Zoltan2{
 
 
template <typename Adapter>
class AlgNatural : public Algorithm<Adapter>
{
  private:
 
  const RCP<IdentifierModel<Adapter> > model;
  const RCP<Teuchos::ParameterList> pl;
  const RCP<const Teuchos::Comm<int> > comm;
 
  public:
 
  typedef typename Adapter::lno_t lno_t;
  typedef typename Adapter::gno_t gno_t;
 
  AlgNatural(
    const RCP<IdentifierModel<Adapter> > &model__, 
    const RCP<Teuchos::ParameterList> &pl__,
    const RCP<const Teuchos::Comm<int> > &comm__
  ) : model(model__), pl(pl__), comm(comm__)
  {
  }
 
  int globalOrder(const RCP<GlobalOrderingSolution<gno_t> > &/* solution */) {
    throw std::logic_error("AlgNatural does not yet support global ordering.");
  }
 
  int localOrder(const RCP<LocalOrderingSolution<lno_t> > &solution)
  {
 
    int ierr= 0;
 
    HELLO;
 
    // Local permutation only for now.
 
    // Set identity permutation.
    const size_t n = model->getLocalNumIdentifiers();
    lno_t *perm = solution->getPermutationView();
    if (perm){
      for (size_t i=0; i<n; i++){
        perm[i] = i;
      }
    }
    else
      // TODO: throw exception?
      ierr = -1;
 
    solution->setHavePerm(true);
    return ierr;
 
  }
 
};
}
#endif