Example for sorting the EN16931 genericode lists by Code alphabetically

[svanteschubert]

Just a drill no real PR and asking for assistance (or reporting a potential issue)
Trying out ph-genericode by extending its example for sorting the EN16931 genericode lists alphabetically by their Code

[svanteschubert]

Why is an Object returned? How can the attribute value of @ColumnRef be accessed?

Object lhsColumnRef = lhs.getValue().get(0).getColumnRef();
see https://github.com/svanteschubert/ph-genericode/blob/gc-example/src/test/java/com/helger/genericode/Genericode10EN16931CodeListMarshallerTest.java#L86

I aim to get full access to all data of the EN16931 genericode lists to be able to do regression tests and automatic testing!

[phax]

I gave some proposals

[svanteschubert]

Thanks for all the help, the access to the data and the sort are working now!
I am no longer overwriting the initial files (that was just for quick turnaround testing using Visual Studio Code to see changes) and writing them to target/generated-test-sources but you might change this at will (no feelings).
As well, you may switch to lambdas and use the ph libs, while I try to stick with the natives to be able to copy and paste the trick easily.

Thanks again, at least the EN16931 GC reading was successful...I will likely start with POI tomorrow for the spreadsheet. not the expected 1-2 hours but likely more the 1-2 days ;-)

[svanteschubert]

PS: If there are any Nullpointer - like no Code in an EU e-invoice code list, I would like to let them throw... ;-)
Again for a defensive example, you might add preventions, but I am happy with what I got.. Good night! :-)