Re: Beans binding + disappointment
On Tue, 22 Jun 2010, Daniel Pitts wrote:
The trouble with this is that the JTable Model is event driven, where
user-beans need a lot of work to add event notification for property
modification. I've tried to write such a library several times, and
always run into the same issues. Also, custom renders and editors for
bean properties aren't easy to handle in certain cases.
It *is* possible to create an object which implements both
java.util.List and javax.swing.ListModel, the trouble comes from mutable
objects. IF the object mutates, technically an event needs to be fired.
In order to handled that, the beans have to register listeners. A lot
of boiler-plate code. Yarg.
Or else, the binding framework could play at being JPA and take care of
dirty tracking. It could play that dead straight and bind to JPA-annotated
beans, and use existing code weaving techniques to detect changes, or it
could maintain a copy of the state, and diff it with the current state to
generate events on demand. It would be memory- and CPU-heavy, but hey,
next to Swing, who's going to notice?
tom
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