Hello,
I am experimenting with Seam's new Application Framework stuff (EnitityHome,
etc.) in order to write as little code as possible for doing trivial things
(CRUD, in particular).
The question I have relates to editing a parent object and attributes of child
objects from within the same form. Specifically, I have a "Person" class that
contains an instance of an "EmailAddress" class as a property. The
EmailAddress has a "locationAddress" propety that contains the actual address
String. The EmailAddress will initially be null (which is a legitimate case).
I want to use a single "Person" editing form for capturing the Person's simple
propeties and a simple text input in that for for the email address. The
problem I am looking for advice on is how to deal with intelligently
instantiating an EmailAddress when a user enters a string. Since the the
emailAddress property of the Person instance is initially null, JSF binding
fails when a user enters an email address in the form. (the binding expression
for the email inputText is #{myperson.emailAddress.locationAddress}).
Does anyone have any clean solutions for automagically instantiating an
EmailAddress instance and binding it to the Person's emailAddress property
prior to binding the provided emailAddress string to it?
I realize I could add properties and logic to my Home class to deal with this,
or provide delegate transient properties on my Person class, but I am hoping to
avoid this, since this is a pretty common situation and I would like as clean a
solution as possible.
This is not specific to Seam, or the App Framework, or JSF for that matter, but
I am hoping someone has some thoughts on it....
Thanks,
Shea.
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