hi all, (again)
[ hope that someone reads my previous post ... ]
I would like to intercept the lifecycle of the Form Model object.
if I understand the architecture right, then the Action (which extends
AbstractXMLFormAction), when started creates a new Form instance and
stores it in the request attribute or in the Session, depending on the
configuration.
--- form creation --------------------------------------
* AbstractXMLFormAction.getForm( )
and the model is created using
* AbstractXMLFormAction.getFormModel( )
which looks up the class form the parameters and does a Class.forName( )
-- form deletion ----------------------------------------
Form.remove( objectModel, id );
now what I would like to do is the following:
a) in the START state: intercept FormModel initialization
b) in the END state: intercept FormModel disposal
mechanisms would be:
--- extend the listeners and add: -----------------------
interface FormModelLifecycleListener
{
void beforeInitialize( );
void afterInitialize( Object amodel );
void beforeDispose( int formstate, Object amodel );
void afterDispose( );
}
which can be registered.
--- let the model implement avalon activity interfaces ---
class MyModel implements Disposable, Initializable
{
....
void initialize( ) { /* do soemthing here .. */ }
void dispose( ) { /* do something here .. */ }
}
With these interceptors I could load the model with data from an
appserver prior to using it in the form ....
also important would be something like:
/* AWT ActionListener ... */
interface ActionListener {
void actionPerformed( ActionEvent e ) {
}
}
With such an interface the business logic could intercept the outcome of
the form handling and could take appropriate steps (like use the
formModel to change data ).
I need something like the above in order to application server handling.
I am just getting started with XMLForm - so please bear with me.
Also it is already pretty late, but nevertheless I post my initial ideas
on that.
I look forward to hearing any resposne ...
thanks
-- Jakob
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