Batch Processing Policy Classifier

Enumerates possible values for batch processing policy.
Allows to select policy for batch processing if a validation file was generated by the system.

If there was at least one valid transaction, validate file should be generated and the main request file would be not processed at all.

Any valid transaction in a request file will be processed. Any invalid one will be placed into the validation file. Therefore, all invalid transactions from the validation file will have to be re-processed as a separate file afterwards.