✎ javacard:jcre:6.2.4.1_server_applet_a_builds_a_shareable_interface_object [wiki]

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=== 6.2.4.1 Server Applet A Builds a Shareable Interface Object ===

1. To make an object available for sharing with another applet in a different context, applet A first defines a shareable interface, SI. A shareable interface extends the interface **javacard.framework.Shareable**. The methods defined in the shareable interface, SI, represent the services that applet A makes accessible to other applets. 

2.  Applet A then defines a class C that implements the shareable interface SI. C implements the methods defined in SI. C may also define other methods and fields, but these are protected by the applet firewall. Only the methods defined in SI are accessible to other applets. 

3.  Applet A creates an object instance O of class C. O belongs to applet A, and the firewall allows A to access any of the fields and methods of O.

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