I'm using the "native" method to generate my table id's. Before having my values set in the database (so, before having my id value set in the db), i need to get this value, so i can generate another controller (based on the current date and id) value which is going to be stored in another column. Are there hibernate ways to do it? what is the best one?

Thanks

No. It is technically impossible to get the next id in many cases, for example if using auto-increment on mysql.

Is there a way to start generating the id not from 1, but from a number i specify?

Depends on the generator and your database.

it is mysql, and i want to increment of 1. So, I'm using the native method in the hibernate mapping file. Ok, all works fine. But I'd like the first generated id not to be "1", but to be another value (any value), and increment of 1 after this value for the rest of the values.

You can set the starting value of autoincrement when creating the tables, I think by doing something like this:

is there a way to do it in the mapping file?

no