Partial processing of input file

Hello all,

I'm developing a File-File interface and I need to process the input file partially here. For eg., If the input file has 10 records and only 7 of the 10 records satisfy a criteria then those 7 records will be processed and sent to output file, other 3 will be rejected and should be sent to a log file. Can you guys please suggest how this can be achieved?

Thank you,

Kishan.