[news.eclipse.rt] How to associate one or more content types based on so

["Randy Hudson" <none@xxxxxxx>]

Imagine I have a WebDAV server or something and a "file" I'd like to open 
at:

webdav://server.com/path1/path2/foo

The "foo" filename is completely meaningless and doesn't tell me its content 
type, but a HEAD call to the server would return the mime-type, which could 
be converted to a content-type easily.

How do I hook into:
Platform.getContentTypeManager().findContentTypeFor(String)  //(In this 
case, string is a URL)
...so that when the String begins with "webdav:" I can provide some helper 
that connects to the server and discovers the content type the right way and 
returns it to the ContentTypeManager?  The only hack/workaround I see is to 
provide *lots* of content describers, all of which have to start parsing the 
file contents because the filename/URL isn't even available to the 
describer.