Is there a way to read portions of the file, for the sake of memory consumption?

I know you have asked me several times if I would start committing on jfilehelpers instead of continuing the development on http://fixedformat4j.ancientprogramming.com. I understand that it would be the most reasonable to join forces, but I don’t have that much time on my hand at the moment.

http://fixedformat4j.ancientprogramming.com focuses on reading and writing fixedformatted flatfiles and will probably not go in the direction of handling delimited files like csv format etc.
We uses fixedformat4j on my current project to read and write rather complex and large fixedformatted files where each line doesn’t represent the same kind of data – like a customer or so.
As I see the sourcecode of jfilehelper it is create if you need to export, say, an array of customers to text format, but doesn’t help me if each line is completely different from each other?
This is the direction I would like to take fixedformat4j – help parsing and creating complex data like that – targeting projects that needs to integrate with legacy applications that uses EDI or some other flat file format as the protocol.