[GNC] Using libgnc-engine.so

[NH Rao]

Greetings,

Everything on Ubuntu 24.04 if that matters.

I am experimenting with (relatively new) Java FFM API which allows
interacting with shared  libraries using Java. I wanted to see if I can use
gnucash API to coax some information I care about in the format I
want. I've cloned gnucash sources and using it as a reference.

So far I have successfully managed to generate Java bindings but struggling
with basic operation sequences. I am using some of the tests e.g.
gtest-load-save-files.cpp as an example of how operations are being done.

I am getting an error 'failed to get_backend using access method "file"'
when trying to open the file whether I provide URI format like file:// or
just absolute path. At this moment, the file does not exist and I was
hoping to save a newly created file.

Essentially the order of operations is as follows even though it has all
the Java syntax tagged.

qof_init()
book = qof_book_new()
session = qof_session_new(book)
qof_sesson_begin(session, "file path", SESSION_NEW_STORE)

Can you please suggest what I am doing wrong and why I am getting
the errors. Looks like I forgot to do some basic steps.

Regards,
Niranjan