User defined class objects for a ADF component (button,inputfield)

How do I define a user defined class object for ADF objects?
My requirement is that when I do a modification to the class object, it should get reflectected to all the instances on my page.
E.g:- I'm having class object clsInputField, and all my input fields in my pages are based on this object. So when I change clsInputField it should get reflected to all my controls based on this class object.
Please help!!!

Hi Timo,
In our client server environment, we have a custom control for managing the zip code (used a Custom InputText field which extends the actual TextField) . All zip code specific validations are written in this custom class. In our application many of the pages uses this Custom component. So if any of the zipcode specific behaviour changes, we could implement this by only changing the Custom InputText field class.
We need to implement this behaviour in our ADF applications. Please advise.
Thanks,
Vishnu

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