Mapping logic

HI experts,

I having a following requirement.

File to File:

based on the filtering conditions, i need to filter the file.

i have 50 records in my file, If my Field1 = A, then i need to perform some filtering and then populate the records. which in this case will reduce the records at the target structrure. may be 35.

If Field1 is NOT EQUAL = A, then i need to populate all the 50 records as it is.

it is simple but somehow i am getting stuck in generating the records in both the cases with IF ELSE THEN as the source node is only ONE.

Can you please advise.

Regards