Hello,
Harley V.Barrales wrote:
> CardRequest cr = new CardRequest(CardRequest.NEWCARD, null, null);
>
> I can successfully create a SmartCard object.
This call means that you are not requesting a card with a
particular functionalty, i.e., any card insterted will create
the SmartCard object.
> But when I tried to invoke the followng codes:
>
> FileAccessCardService facs = (FileAccessCardService)
> sc.getCardService(FileAccessCardService.class, true);
>
> the exception error occurs...
Which mean that you have either:
- inserted a card that cannot do the "FileAccess" functionality
(as defined by the OCF interface you are requesting), or
- that has no implementation for this interface (a CardService,
in the OCF vocabulary), or
- that this implementation has not been declared as available
in your "opencard.properties" file where you declare available
CardServiceFactories for your platform, see for more details:
http://www.opencard.org/docs/pguide/PGuide.html#HDRCONFIGURINGTHEOCF
on declaring factories, "opencard.properties" file, etc. or
- that the declared factory has not "recognized" the card, either
by looking at its ATR or by having a dialog with it.
I hope I haven't forgot one or two possible reasons, but you get
the idea.. at one point or another OCF is trying to match a couple
of CardService interface (functionality), and an actual card that
has to be recognized by a factory. if no implementation exist or has
been declared (in the properties file) or corresponds to the actual
card, then a "ClassNotFoundException" is thrown (which BTW is probably
not a good choice, because it confuses users).
> It seems that the CardRequest requires to have the constructor as
> follows :
>
> CardRequest cr = new CardRequest(CardRequest.NEWCARD, null,
> FileAccessCardService.class);
>
This is basically equivalent except that you ask OCF to check
for the "CardService implementation"<->"actual card inserted"
couple earlier in the process and to block until the right type
of card is inserted..
> But whenever I tried to do so, the program hangs in the SmartCard
> object creation.
It makes sense.
Hope it'll help.
Cheers,
Christophe.
= "The church is near, but the road is slippery. The bar is far away, =
= but I will walk carefully." --Russian Proverb =
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