The factory for creating new JDOM objects
This method is called in response to a fatal error; this indicates that
a rule has been broken that makes continued parsing either impossible
or an almost certain waste of time.
Imitation of File.toURL(), a JDK 1.2 method, reimplemented
here to work with JDK 1.1.
Classes which wish to modify the behaviour of the FilterList
can implement the list filter interface in order to reduce
the visibility of certain items in the list, or to restrict
the mutability of the list.
This will flush any characters from SAX character calls we've
been buffering.