Hi all,

I am writing my first UDAF. In my terminatePartial() function, I need to store 
different data having different data types. Below is a list of items that I 
need to store
1. C1 : list of doubles
2. C2: list of doubles
3. C3: double
4. Show: list of strings


I am wondering can I use simple HashMap and store these different objects into 
it. Will it automatically serialize or will I need to write my own 
serializiable method. Also is there any example of a UDAF that shows how to use 
map type structure for storing partial results. 

Thanks

Ritesh

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