GNU JAF is a framework for declaring what beans operate on what MIME
type data. Content handler beans can be defined to handle particular
MIME content. The JAF unites internet standards for declaring content
with JavaBeans. The JAF defines two mechanisms within the framework.
The first, the file type map, specifies the MIME content type for a
given file. The default implementation of this uses the UNIX mime.types
format to map filename extensions to MIME types. The second mechanism,
the command map, specifies the actions that can be applied to a given
MIME content type. The default implementation of this uses the standard
mailcap format to map actions to JavaBean™ classes. These beans
can then view, edit, print, or perform whatever other action is
required on the underlying resource.