File Adapter - Read file completely

Dear community

We have a file interface where we want to read a file completely, instead line-by-line. This is due to performance reasons. The bapi we want to use in our action is able to use a table of data. This data is read from a file, manipulated and then passed to the bapi. So far, we read the data line-by-line from our file. Is it possible to read the file completely and then execute the action once for all read data?

Thank you in advance,

Kind regards

Thimo