An EntryProcessor is a class that knows how to create a section of a feed
for output.
This interface is generally implemented by an Element which then passes
itself into an EntryProvider to allow the EntryProvider to stream results
straight into the feed instead of dumping a large collection.
Generally called by an EntryProvider while streaming results from the
DB to the feed provider/outputter.
Parameters: entry - the Entry to be written to the feed See Also:Entry See Also:EntryProvider since: 1.0