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Zoltan2_BasicIdentifierAdapter.hpp
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45 
50 #ifndef _ZOLTAN2_BASICIDENTIFIERADAPTER_HPP_
51 #define _ZOLTAN2_BASICIDENTIFIERADAPTER_HPP_
52 
54 #include <Zoltan2_StridedData.hpp>
55 
56 namespace Zoltan2 {
57 
81 template <typename User>
83 
84 public:
86  typedef typename InputTraits<User>::lno_t lno_t;
87  typedef typename InputTraits<User>::gno_t gno_t;
90  typedef User user_t;
91 
106  BasicIdentifierAdapter(lno_t numIds, const gno_t *idPtr,
107  std::vector<const scalar_t *> &weights, std::vector<int> &weightStrides);
108 
116  BasicIdentifierAdapter(lno_t numIds, const gno_t *idPtr):
117  numIds_(numIds), idList_(idPtr), weights_() {}
118 
120  // The Adapter interface.
122 
123  size_t getLocalNumIDs() const { return numIds_; }
124 
125  void getIDsView(const gno_t *&Ids) const { Ids = idList_; }
126 
127  int getNumWeightsPerID() const { return weights_.size(); }
128 
129  void getWeightsView(const scalar_t *&weights, int &stride, int idx) const {
130  if (idx < 0 || idx >= weights_.size()) {
131  std::ostringstream emsg;
132  emsg << __FILE__ << ":" << __LINE__
133  << " Invalid weight index " << idx << std::endl;
134  throw std::runtime_error(emsg.str());
135  }
136  size_t length;
137  weights_[idx].getStridedList(length, weights, stride);
138  }
139 
140 private:
141  lno_t numIds_;
142  const gno_t *idList_;
143  ArrayRCP<StridedData<lno_t, scalar_t> > weights_;
144 };
145 
147 // Definitions
149 
150 template <typename User>
152  lno_t numIds, const gno_t *idPtr,
153  std::vector<const scalar_t *> &weights, std::vector<int> &weightStrides):
154  numIds_(numIds), idList_(idPtr), weights_()
155 {
156  typedef StridedData<lno_t, scalar_t> input_t;
157  size_t numWeights = weights.size();
158 
159  if (numWeights > 0){
160  weights_ = arcp(new input_t [numWeights], 0, numWeights, true);
161 
162  if (numIds > 0){
163  for (size_t i = 0; i < numWeights; i++){
164  int stride = weightStrides.size() ? weightStrides[i] : 1;
165  ArrayRCP<const scalar_t> wgtV(weights[i], 0, stride * numIds, false);
166  weights_[i] = input_t(wgtV, stride);
167  }
168  }
169  }
170 }
171 
172 } //namespace Zoltan2
173 
174 #endif
BasicIdentifierAdapter(lno_t numIds, const gno_t *idPtr, std::vector< const scalar_t * > &weights, std::vector< int > &weightStrides)
Constructor.
IdentifierAdapter defines the interface for identifiers.
void getIDsView(const gno_t *&Ids) const
Provide a pointer to this process&#39; identifiers.
InputTraits< User >::gno_t gno_t
lno_t size() const
Return the length of the strided array.
default_part_t part_t
The data type to represent part numbers.
Defines the IdentifierAdapter interface.
static ArrayRCP< ArrayRCP< zscalar_t > > weights
This class represents a collection of global Identifiers and their associated weights, if any.
default_lno_t lno_t
The ordinal type (e.g., int, long, int64_t) that represents local counts and local indices...
The StridedData class manages lists of weights or coordinates.
default_gno_t gno_t
The ordinal type (e.g., int, long, int64_t) that can represent global counts and identifiers.
default_node_t node_t
The Kokkos node type. This is only meaningful for users of Tpetra objects.
BasicIdentifierAdapter(lno_t numIds, const gno_t *idPtr)
Constructor.
int getNumWeightsPerID() const
Returns the number of weights per object. Number of weights per object should be zero or greater...
void getWeightsView(const scalar_t *&weights, int &stride, int idx) const
Provide pointer to a weight array with stride.
size_t getLocalNumIDs() const
Returns the number of objects on this process.
default_scalar_t scalar_t
The data type for weights and coordinates.
This file defines the StridedData class.