JavaBeans Activation Framework

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Java Activation Framework, or JAF, enables developers to determine the type of an arbitrary piece of data, to encapsulate access to the data, to discover the functional operations available on it, and to instantiate the appropriate bean to perform the operation(s). It also enables you to dynamically register types of arbitrary data and actions associated with particular kinds of data. Additionally, it enables a program to dynamically provide or retrieve JavaBeans that implement actions associated with some kind of data.