Hello Edward,
I'll try to explicit a bit more what you say in order to understand better.
You mean that the proxy that I receive as its own base class and it only
"looks like" my remote interface => when asking it about its class I receive
information about itw own proxy base class but I am able to invoke remote
interface methods on it.
Consequently, If I want to be able to "mimic" the isa behaviour, I need to
add a method signature, for example "myKindIs():String" and invoke it on the
proxy to know to whom I am speaking => I get an extra network round trip
delay.
correct?
If this is correct, it is quite sad... Any hint on how to give some hapiness
on this topic?
Cheers,
Sacha
> -----Message d'origine-----
> De : [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]De la part de Kenworthy, Edward
> Envoyé : lundi, 5 février 2001 10:40
> À : 'jBoss'
> Objet : RE: [jBoss-User] IsA behaviour when inheriting beans
>
>
> If what you are getting back is not an EJB then it will behave
> normally. If
> it is an EJB then it won't unless you explicitly code it (*and*,
> this is the
> real killer, its parent) to work like that.
>
> -----Original Message-----
> From: Sacha Labourey [mailto:[EMAIL PROTECTED]]
> Sent: 05 February 2001 09:14
> To: jBoss
> Subject: RE: [jBoss-User] IsA behaviour when inheriting beans
>
>
> Hello Edward,
>
> Thank you for your reply. I admit that the EJB spec does not support
> "component inheritance". What I am trying to figure out is how
> standard Java
> inheritance can be used withing EJB.
>
> My main interrogation is about the serialized proxy that is
> returned back to
> the client code. Does this proxy accuratly knows its class type? i.e. if a
> get back a base class type from a method call and this object is
> a proxy for
> an EJB, may I call instanceof on it to get information on its real target
> class? (i.e. more usable example below in my previous e-mail)
>
> I understand this behaviour as not being directly "component inheritance"
> but rather more standard java inheritance behaviour.
>
> Do you follow me ?
>
> Cheers,
>
>
>
> Sacha
>
>
> > -----Message d'origine-----
> > De : [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]De la part de Kenworthy, Edward
> > Envoyé : lundi, 5 février 2001 09:25
> > À : 'jBoss'
> > Objet : RE: [jBoss-User] IsA behaviour when inheriting beans
> >
> >
> > Inheritance isn't supported by the EJB spec'. You can get a sort of
> > fake-inheritance running BUT it will be very inconsistent (eg
> > sometimes the
> > inheritance will work as expected sometimes it won't.)
> Personally I would
> > avoid it.
> >
> > -----Original Message-----
> > From: Sacha Labourey [mailto:[EMAIL PROTECTED]]
> > Sent: 02 February 2001 10:50
> > To: jBoss
> > Subject: [jBoss-User] IsA behaviour when inheriting beans
> >
> >
> > Hello,
> >
> > I've got some questions regarding inheritance in Jboss.
> >
> > Imagine these RI:
> > - interface ABusiness ...
> > - interface A extends ABusiness, EJBObject ...
> >
> > a son of A:
> > - interface B1Business extends ABusiness ...
> > - interface B1 extends B1Business, A ...
> >
> > another son of A, brother of B1:
> > - interface B2Business extends ABusiness ...
> > - interface B2 extends B2Business, A ...
> >
> >
> > If I have a method of antoher Bean which returns a base class A, is it
> > possible to use a instanceOf behavior on the client side to
> decide which B
> > it is:
> >
> > A = myOtherBean.getBObject (); // return type is A
> > if (A instanceof B1) ...
> >
> >
> > In the same way, what about returned sequences?
> >
> > mySequence = myOtherBean.getManyObjects (); // a sequence of base
> > interface
> > A
> > if (mySequence.elementAt(0) instance of B1)...
> >
> >
> > Does this works automagically? Will the client side proxy knows
> > its accurate
> > distant object type?
> >
> > thank you. Cheers,
> >
> >
> >
> > Sacha
> >
> >
> >
> > --
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