jpa - Hibernate ID Generator -

Is there any good tutorial on creating a custom ID generator for any hibernation?

One of Google's cursory searches for 'Hibernate Custom ID Generator Tutorial' enhanced the following possibilities: Not included people who do not look useful and summarize the content of each.

• - Covering issues before creating an ID (and therefore there is no business yet).
• - The whole document is very useful, but there is not too much tutorial in context. Ideal looking at other tutorials.
• Show how to use annotation to set your schema (including auto-generated values).

Hope that helps.