Implementation of DataFieldMaxValueIncrementer that delegates
to a single getNextKey template method that returns a long.
Uses longs for String values, padding with zeroes if required.
author: Dmitriy Kopylenko author: Juergen Hoeller author: Jean-Pierre Pawlak author: Juergen Hoeller
Determine the next key to use, as a long.
the key to use as a long. It will eventually be converted laterin another format by the public concrete methods of this class.