Is it possible to read a nested Binary Field?

## Background

Let's say that I'm reading a "normal" AVRO file using Spark. One of the fields in the schema of this Avro is a Binary encoded as EBCDIC that should be decoded using a copycobol referenced by another field within the same schema.
Potentially each record can have its copycobol (so for each record the binary might have a different schema) and the desiderata is to produce a json version of the binary field to store somewhere else.

The DF looks something like this:
| ID | SCHEMA_ID | BINARY_FIELD | FIELD1 | FIELD2 | ..... |
| -- | -- | -- | -- | -- | -- |
| 1 | 001 | M1B1N4R11 | valueX | valueZ | .. |
| 2 | 010 | M1B1N4R12 | valueY | valueW | .. |

And in the folder _copycobol/_ I have:
- 001.cob
- 010.cob

## Question
Is it possible to leverage the library to decode a field instead of a file? Or do I have to save the binary field temporarily in a file and decode it from there?

Thank you for any suggestion! :)