00001 #ifndef REDUCER_H
00002 #define REDUCER_H
00003
00005 template<class KeyA, class A, class KeyB, class B, class C>
00006 class Reducer
00007 {
00008 public:
00010 #ifndef MRI_USE_MULTIMAP
00011 virtual vector< pair<KeyB,C> > run( vector< pair<KeyB,B> > & ) = 0 ;
00012 #else
00013 virtual vector< pair<KeyB,C> > run( multimap<KeyB,B> & ) = 0 ;
00014 #endif
00015
00016 virtual pair<KeyB,C> reduce( pair<KeyB, vector<B> > ) = 0 ;
00017 private:
00018 MapReduce<KeyA,A,KeyB,B,C> * mapReduce;
00019 };
00020
00022 class StrReducer : public Reducer<string,string,string,string,string> {};
00023
00024 #endif
