return a databag given a tuple in PIG - apache-pig

Question

I am trying to write an UDF which takes a tuple as an input and return a databag as an output. I am very new to PIG. Please help. The example I have is the UPPER.java class example.
example of what the UDF should do
the input is say <8,9,1,8,9> the output should be <{8,2} {9,2} {1,1}> 8 appears 2 times, 9 does too and 1 appears once.

Answer 1

I found a solution.
Step 1: Load input file
input_data= load '/idn/home/ksing143/tuple_related_data/tuple_frequency.txt' USING PigStorage() AS ip_tuple:tuple(a:int, b:int, c:int, d:int, e:int);
Result:
((8,9,1,8,9))
Step 2: flatten the input tuple
ip_flattened = foreach input_data generate FLATTEN($0);
Step 3: Convert to bag
ip_tobag = foreach ip_flattened generate TOBAG(ip_tuple::a,ip_tuple::b,ip_tuple::c,ip_tuple::d,ip_tuple::e);
Result:
({(8),(9),(1),(8),(9)})
Step 4: Flatten the bag
ip_tobag_flattened = foreach ip_tobag generate FLATTEN($0);
Result:
(8)
(9)
(1)
(8)
(9)
Step 5: Perform Grouping and then count
ip_grouped = group ip_tobag_flattened BY $0;
ip_out = foreach ip_grouped generate group, COUNT($1);
Result:
(1,1)
(8,2)
(9,2)
Step 6: Convert output TOBAG as we want output in the form of bag.
ip_output_bag = foreach ip_out generate TOBAG($0,$1);
Result:
({(1),(1)})
({(8),(2)})
({(9),(2)})