Narrowing always required?

If I have already narrowed an EJB interface, for example:
Object ref = jndiContext.lookup("CabinHome");
CabinHome cabinHome = (CabinHome)PortableRemoteObject.narrow (ref, CabinHome.class);
Can I subsequently always, safely do Java casts on it? For example, if I later add "cabinHome" to a Map:
myMap.put("cabinHomeKey", cabinHome);
<and later retrieve it...>
// can I do this java cast?
CabinHome cabinHome = (CabinHome)myMap.get("cabinHomeKey");
// or must I always do a "narrow" on a remote interface?
CabinHome cabinHome = (CabinHome)PortableRemoteObject.narrow (myMap.get("cabinHomeKey"), CabinHome.class);
Thanks in advance for your help.

You do not need to narrow the reference again.
-- Rob
Richard Beauchamp wrote:
>
If I have already narrowed an EJB interface, for example:
Object ref = jndiContext.lookup("CabinHome");
CabinHome cabinHome = (CabinHome)PortableRemoteObject.narrow (ref, CabinHome.class);
Can I subsequently always, safely do Java casts on it? For example, if I later add "cabinHome" to a Map:
myMap.put("cabinHomeKey", cabinHome);
<and later retrieve it...>
// can I do this java cast?
CabinHome cabinHome = (CabinHome)myMap.get("cabinHomeKey");
// or must I always do a "narrow" on a remote interface?
CabinHome cabinHome = (CabinHome)PortableRemoteObject.narrow (myMap.get("cabinHomeKey"), CabinHome.class);
Thanks in advance for your help.

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kappa9h wrote:
let's say i am writing a Class . and i want this Class to be bullet-proof.That's a tall order! ;-)
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consider this method:of course not
>
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