pre-store method/hook

[Thad Welch]

 
hello,
 
does anyone know how to implement a pre-store method/hook in OJB for
individual domain classes. the pre-store method will be invoked before
OJB's store() and would validate the domain object's data before
database saving. i'm using OJB's cascade save/auto-update feature so
explicitly calling a pre-store method before OJB's store wouldn't cover
all objects saved by cascading. 
 
thanks,
thad