How to trigger property invalidation? (original) (raw)

Werner Lehmann lehmann at media-interactive.de
Mon Nov 5 02:57:34 PST 2012

Hi Pavel,

On 05.11.2012 09:46, Pavel Safrata wrote:

I understand your concern, I've come across a similar issue some time ago. Your approach looks technically nice but conceptually is not so nice because the property refers to an employee, and even if the employee moved to a different address, it's still the same employee. Admitting it doesn't look so neat, here is the approach we've chosen:

thanks. It is true, editing the employee does not make it a different employee. That's exactly why I'd prefer to invalidate the property without replacing the employee instance ;-)

I realize that making everything observable would solve this problem - while creating a new one: server provides a POJO, and for GUI I'd have to copy the data to an "FX-Employee" bean. And that's exactly one of the topics in this other property thread on the list (blackmagic (I like that), property paths, etc).

Personally I don't want to create those FX observable beans shadowing the domain beans to get observability. The data of a single employee would go from the database to a Hibernate bean to a domain bean to an FX bean and back. That's a lot of copying and boilerplate.

But I also realize that there is no easy way to have both. It seems easy enough to make markInvalid protected but even then I'd have to find a workaround for 2.2.x.

Rgds Werner

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