StatCoder.hpp

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#ifndef StatCoder_HPP
#define StatCoder_HPP

#include "common.hpp"
#include <iostream>


template <class CODER>
class StatCoder : public CODER
{
   public:
      typedef typename CODER::params_t params_t;
      StatCoder(const params_t* par) : CODER(par), first_run(true),
      nr_of_transactions(0), sum_of_tr_sizes(0){}
      template <class BIS> counter_t nextTransactionBIS( BIS& transaction )
      {
         if(first_run)
         {
            counter_t return_value = CODER::nextTransactionBIS(transaction);
            if(return_value)
            {
               ++nr_of_transactions;
               sum_of_tr_sizes += transaction.size();
            }
            else
            {
               log_info(0,"Average size of the coded/filtered transactions: %lg", static_cast<double>(sum_of_tr_sizes)/nr_of_transactions);
               first_run = false;
            }
            return return_value;
         }
         else 
            return CODER::nextTransactionBIS(transaction);

      }
      template <class UAC> counter_t nextTransactionUAC( UAC& transaction )
      {
         if(first_run)
         {
            counter_t return_value = CODER::nextTransactionUAC(transaction);
            if(return_value)
            {
               ++nr_of_transactions;
               sum_of_tr_sizes += transaction.size();
            }
            else
               first_run = false;
            return return_value;
         }
         else 
            return CODER::nextTransactionUAC(transaction);
      }

   protected:
      bool first_run;
      unsigned int nr_of_transactions;
      unsigned int sum_of_tr_sizes;
};


#endif

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