codeComplete does nothing!

["ben cowley" <ben.cowley@xxxxxxxxxx>]

Hi all,
I'm trying to get context information from the compilation unit in my
current editor, and I've done
c.codeComplete(myCompletionRequestor, offset)
and then tried to get info back from the CompletionRequestor that I
instantiated. myCompletionRequestor extends CompletionRequestorAdapter and
basically uses the code from the jdt.ui completion requestor class,
ResultCollector.
So I was able to call
JavaCompletionProposal[] jprop = myCompletionRequestor.getResults()
but jprop comes back with a length of 0.
My problem is that Ive looked into getResults() and it is extracting
information from an array of ArrayList's called fResults. I then went to
look in codeComplete(), and its super declaration and the important methods
called therein, and I cant find where fResults might have been initialised.
So the fact that fResults is null for a valid CompilationUnit is what I need
to fix, but I need to know how to do that.

Thanks a lot.