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Zoltan2_BasicIdentifierInput.hpp
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00005 //   Zoltan2: A package of combinatorial algorithms for scientific computing
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00045 
00050 #ifndef _ZOLTAN2_BASICIDENTIFIERADAPTER_HPP_
00051 #define _ZOLTAN2_BASICIDENTIFIERADAPTER_HPP_
00052 
00053 #include <Zoltan2_IdentifierAdapter.hpp>
00054 #include <Zoltan2_StridedData.hpp>
00055 
00056 namespace Zoltan2 {
00057 
00082 template <typename User>
00083   class BasicIdentifierAdapter: public IdentifierAdapter<User> {
00084 
00085 public:
00086 
00087   typedef typename InputTraits<User>::scalar_t    scalar_t;
00088   typedef typename InputTraits<User>::lno_t    lno_t;
00089   typedef typename InputTraits<User>::gno_t    gno_t;
00090   typedef typename InputTraits<User>::gid_t    gid_t;
00091   typedef typename InputTraits<User>::node_t   node_t;
00092   typedef IdentifierAdapter<User> base_adapter_t;
00093   typedef User user_t;
00094 
00110   BasicIdentifierAdapter( lno_t numIds, const gid_t *idPtr, 
00111     vector<const scalar_t *> &weights, vector<int> &weightStrides);
00112 
00114   // The Adapter interface.
00116 
00117   size_t getLocalNumIDs() const { return numIds_;}
00118 
00119   void getIDsView(const gid_t *&Ids) const { Ids = idList_; }
00120 
00121   int getNumWeightsPerID() const { return weights_.size(); }
00122 
00123   void getWeightsView(const scalar_t *&weights, int &stride, int idx) const
00124   {
00125     if (idx < 0 || idx >= weights_.size()) {
00126       std::ostringstream emsg;
00127       emsg << __FILE__ << ":" << __LINE__
00128            << "  Invalid weight index " << idx << std::endl;
00129       throw std::runtime_error(emsg.str());
00130     }
00131     size_t length;
00132     weights_[idx].getStridedList(length, weights, stride);
00133   }
00134 
00135 private:
00136 
00137   lno_t numIds_;
00138   const gid_t *idList_;
00139   ArrayRCP<StridedData<lno_t, scalar_t> > weights_;
00140 };
00141 
00143 // Definitions
00145 
00146 template <typename User>
00147   BasicIdentifierAdapter<User>::BasicIdentifierAdapter(
00148     lno_t numIds, const gid_t *idPtr,
00149     vector<const scalar_t *> &weights, vector<int> &weightStrides):
00150       numIds_(numIds), idList_(idPtr), weights_()
00151 {
00152   typedef StridedData<lno_t,scalar_t> input_t;
00153   size_t numWeights = weights.size();
00154 
00155   if (numWeights > 0){
00156     weights_ = arcp(new input_t [numWeights], 0, numWeights, true);
00157 
00158     if (numIds > 0){
00159       for (size_t i=0; i < numWeights; i++){
00160         int stride = weightStrides.size() ? weightStrides[i] : 1;
00161         ArrayRCP<const scalar_t> wgtV(weights[i], 0, stride*numIds, false);
00162         weights_[i] = input_t(wgtV, stride);
00163       }
00164     }
00165   }
00166 }
00167 
00168   
00169   
00170 }  //namespace Zoltan2
00171   
00172 #endif