Zoltan2_Adapter.hpp

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#ifndef _ZOLTAN2_ADAPTER_HPP_
#define _ZOLTAN2_ADAPTER_HPP_

#include <Kokkos_Core.hpp>
#include <Zoltan2_Standards.hpp>
#include <Zoltan2_InputTraits.hpp>
#include <Zoltan2_PartitioningSolution.hpp>

namespace Zoltan2 {

enum BaseAdapterType {
  InvalidAdapterType = 0, 
  IdentifierAdapterType,  
  VectorAdapterType,      
  MatrixAdapterType,      
  GraphAdapterType,       
  MeshAdapterType         
};

class BaseAdapterRoot {
public:
  virtual ~BaseAdapterRoot() {}; // required virtual declaration

  virtual size_t getLocalNumIDs() const = 0;

  virtual int getNumWeightsPerID() const { return 0; };
};

template <typename User>
  class BaseAdapter : public BaseAdapterRoot {

public:
  typedef typename InputTraits<User>::lno_t lno_t;
  typedef typename InputTraits<User>::gno_t gno_t;
  typedef typename InputTraits<User>::scalar_t scalar_t;
  typedef typename InputTraits<User>::part_t part_t;  
  typedef typename InputTraits<User>::offset_t offset_t;

  virtual enum BaseAdapterType adapterType() const = 0;

  virtual ~BaseAdapter() {};

  virtual void getIDsView(const gno_t *&ids) const {
    Kokkos::View<gno_t *> kokkosIds;
    getIDsKokkosView(kokkosIds);
    ids = kokkosIds.data();
  }

  virtual void getIDsKokkosView(Kokkos::View<gno_t *> &ids) const {
    Z2_THROW_NOT_IMPLEMENTED
  }

  // *    \param wgt on return a pointer to the weights for this idx
  // *    \param stride on return, the value such that
  // *       the \t nth weight should be found at <tt> wgt[n*stride] </tt>.
  // *    \param idx  the weight index, zero or greater
  // *   This function must be implemented in derived adapter if
  // *   getNumWeightsPerID > 0.
  // *   This function should not be called if getNumWeightsPerID is zero.
  // */ 
  virtual void getWeightsView(const scalar_t *&wgt, int &stride,
                              int idx = 0) const {
    Kokkos::View<scalar_t *> tempWeightsView;
    getWeightsKokkosView(tempWeightsView, idx);
    wgt = tempWeightsView.data();
    stride = 1;
  }

  // *    \param wgt on return a pointer to the weights for this idx
  // *    \param idx  the weight index, zero or greater
  // *   This function must be implemented in derived adapter if
  // *   getNumWeightsPerID > 0.
  // *   This function should not be called if getNumWeightsPerID is zero.
  // */ 
  virtual void getWeightsKokkosView(Kokkos::View<scalar_t *> &wgt, 
                              int idx = 0) const {
    Z2_THROW_NOT_IMPLEMENTED
  }

  void getPartsView(const part_t *&inputPart) const {
    // Default behavior:  return NULL for inputPart array;
    // assume input part == rank
    inputPart = NULL;
  }

  template <typename Adapter>
    void applyPartitioningSolution(const User &in, User *&out,
      const PartitioningSolution<Adapter> &solution) const {
    Z2_THROW_NOT_IMPLEMENTED
  }

};
  
}  //namespace Zoltan2
  
#endif