vector/FrequentItemInserter.hpp

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#ifndef FrequentItemInserter_HPP
#define FrequentItemInserter_HPP

#include "apriori/bodon-vector/vector_typedef.hpp"
#include "common.hpp"
#include <vector>
//#include <cstdio>
//#include <iterator>   //for test


namespace Bodon
{
namespace vector_based
{
template <class DATASTRUCTURE, class D>
class FrequentItemInserter
{
   protected:
      D& decoder;
   public:
      FrequentItemInserter<DATASTRUCTURE, D>( DATASTRUCTURE& candidates, 
                               D& decoder ) :
         decoder(decoder) {}

      void setEmptysetSupport(const counter_t emptyset_support)
      {
         std::vector<item_t> itemset;
         decoder.writeItemsetAndCounter(
            itemset.begin(), itemset.end(), emptyset_support);
      }

      void insertFrequentItems(const std::vector<counter_t>& freq_counters )
      {
         std::vector<item_t> itemset;
         for(std::vector<counter_t>::size_type index=0; 
             index< freq_counters.size(); ++index )
         {
            itemset.push_back(index);
            decoder.writeItemsetAndCounter(
               itemset.begin(), itemset.end(), freq_counters[index]);
            itemset.pop_back();
         }
      }
};
}
}

#endif

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