Use of GenericGenerator

zarick · **Joined:** Fri Feb 02, 2007 6:55 am **Posts:** 8

Can I use GenericGenerator on non-id property?

I would like to write a custom generator, which supposed the nextHi
value is backed by a table.

Is it doable?

Thanks in advance!

emmanuel · **Posted:** Wed Mar 07, 2007 8:05 pm

zarick · **Joined:** Fri Feb 02, 2007 6:55 am **Posts:** 8

So, I a have one entity Alarm:

Code:

public class Alarm {
    @Id
    @GeneratedValue
    public int getSystemId() {
        // normal auto-generated primary key
    }
    public Client getOwner() {
    }
    public String alarmId() {
    }
}

Each Client will own a set of Alarm, each client want to reference
the alarm with one unique alarmId (however, the set of alarmId for
two diff. client will intersect).

So, in Database, example of possible data is
systemId ownerId alarmId
1 1 ALM000001
2 1 ALM000002
3 2 ALM000001

Is there any good way to handle the 'alarmId' generation?
Is this criteria / req common in other apps?

Thanks in advance!

emmanuel · **Posted:** Tue Mar 13, 2007 6:42 pm

you could use a custom type to handle the id into 2 columns and use a custom generator, it might work.