How best to perform validations that don't belong in annotat

[grettke_spdr]

Hi folks,

I'm trying to learn the best way to perform complex validations.

Take for example a date range on a query, where there is a start date and an end date on the component.

I only want to validate both fields if either one is present. If none are present, then it is fine, no validation required.

What is the process most folks follow to do custom annotations like this?

[christian.bauer]

Write a custom validator incl. annotation or write procedure code in your controller classes.

[gavin.king]

Look at the booking example.

[grettke_spdr]

Write a custom validator incl. annotation or write procedure code in your controller classes.

Does programmatic component fall into the category of "JSF FAQ" stuff?

Is it simply a matter of populating FacesMessages with an error and then returning null from the action method?