OpenCard  
 
OCF, the OpenCard Framework is a standard Java framework for working with Smart Cards.  
 

opencard.core.service
Class CardServiceRegistry

java.lang.Object
  |
  +--opencard.core.service.CardServiceRegistry
public final class CardServiceRegistry
extends java.lang.Object

The CardServiceRegistry keeps track of CardServiceFactories. When asked for a certain CardService it searches through its registered CardServiceFactorys to find one which is able to create this. NOTE that there exists only one system-wide instance of this class which can be accessed via CardServiceRegistry.getRegistry ().

Version:
$Id: CardServiceRegistry.java,v 1.2 1999/10/22 14:43:28 damke Exp $
See Also:
CardService, CardServiceFactory, CardServiceScheduler, CardChannel

Method Summary
 void add(CardServiceFactory factory)
          Adds a CardServiceFactory to the registry.
protected  java.lang.Class getCardServiceClassFor(java.lang.Class clazz, CardID cid, CardServiceScheduler scheduler)
          Gets a CardService class object for clazz.
 java.util.Enumeration getCardServiceFactories()
          Gets all registered card service factories.
protected  CardService getCardServiceInstance(java.lang.Class clazz, CardID cid, CardServiceScheduler scheduler, SmartCard card, boolean block)
          Tries to instantiate a CardService that is an instance of clazz and that works with the smart card represented by cid.
static CardServiceRegistry getRegistry()
          Gets a reference to the system-wide CardServiceRegistry object ('Singleton' pattern).
protected  SmartCard getSmartCard(CardTerminalEvent ctEvent, CardRequest req, java.lang.Object lockHandle)
          Gets a SmartCard object based on a received CardTerminalEvent.
protected  void releaseScheduler(CardServiceScheduler scheduler)
          Releases a CardServiceScheduler.
 void remove(CardServiceFactory factory)
          Removes the passed CardServiceFactory from the registry.
 java.lang.String toString()
          Gets a meaningful String representation of this CardServiceRegistry.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Method Detail

add

public void add(CardServiceFactory factory)
Adds a CardServiceFactory to the registry.
Parameters:
factory - The CardServiceFactory to add.

getCardServiceClassFor

protected java.lang.Class getCardServiceClassFor(java.lang.Class clazz,
                                                 CardID cid,
                                                 CardServiceScheduler scheduler)
Gets a CardService class object for clazz.
Parameters:
clazz - The class that the requested CardService should be an instance of.
cid - A CardID object representing the smart card for which the CardService is requested.
scheduler - The CardServiceScheduler for the card to be inspected.
Returns:
The CardService class object if available; otherwise null.

getCardServiceFactories

public final java.util.Enumeration getCardServiceFactories()
Gets all registered card service factories. A registered factory is one that has been passed to add, but has not yet been removed using remove.
Returns:
an enumeration of the registered card service factories

getCardServiceInstance

protected CardService getCardServiceInstance(java.lang.Class clazz,
                                             CardID cid,
                                             CardServiceScheduler scheduler,
                                             SmartCard card,
                                             boolean block)
                                      throws java.lang.ClassNotFoundException
Tries to instantiate a CardService that is an instance of clazz and that works with the smart card represented by cid.
Parameters:
clazz - The class that the requested CardService should be an instance of.
cid - A CardID object representing the smart card for which the CardService is requested.
scheduler - The controlling CardServiceScheduler
card - The SmarCard object requesting the CardService
block - Specifies the waiting behavior of the newly created CardService; if true it will wait for CardChannel (i.e., block).
Throws:
java.lang.ClassNotFoundException - Thrown when no fitting CardService could be found.

getRegistry

public static CardServiceRegistry getRegistry()
Gets a reference to the system-wide CardServiceRegistry object ('Singleton' pattern).
Returns:
Reference to the system-wide CardServiceRegistry.

getSmartCard

protected SmartCard getSmartCard(CardTerminalEvent ctEvent,
                                 CardRequest req,
                                 java.lang.Object lockHandle)
                          throws CardTerminalException
Gets a SmartCard object based on a received CardTerminalEvent.
Parameters:
ctEvent - A CardTerminalEvent event received from a terminal.
req - A CardRequest object describing what kind of SmartCard is requested.
lockHandle - handle obtained by lock owner when locking the terminal
Returns:
A SmartCard object or null if not successful.

releaseScheduler

protected void releaseScheduler(CardServiceScheduler scheduler)
Releases a CardServiceScheduler.
Parameters:
scheduler - The CardServiceScheduler to release.

remove

public void remove(CardServiceFactory factory)
Removes the passed CardServiceFactory from the registry.
Parameters:
factory - The CardServiceFactory to add.

toString

public java.lang.String toString()
Gets a meaningful String representation of this CardServiceRegistry.
Overrides:
toString in class java.lang.Object