(possible) fix for jdibug-source-file-to-class-signature to include package name

[GoogleCodeExporter]

When adding a breakpoint for an android application classes-by-signature 
returned nothing.
It seems that it requires the full package and class name to find something.
So toggling a breakpoint always ended with 'JDIbug setting 
breakpoint...pending' instead of ...done. Using this function made it work for 
me. (with borrowed code from jde to get package name) 

(defun jdibug-source-file-to-class-signature (source-file)
  "Converts a source file to a JNI class name."
  (let ((buf source-file)
    (packages (semantic-brute-find-tag-by-class 'package (current-buffer)))
    (class-name (file-name-sans-extension
             (file-name-nondirectory (buffer-file-name)))))
    (when (and (listp packages) (eq (length packages) 1))
      (setf buf (concat (semantic-tag-name (car packages)) "." class-name))
      (setf buf (jdi-class-name-to-class-signature buf)))
    (jdibug-trace "jdi-source-to-class-signature : %s -> %s" source-file buf)
    buf))

(I'm pretty much beginner with elisp (and java), so there are probably other 
issues the above code)

Original issue reported on code.google.com by hannes.j...@googlemail.com on 15 Oct 2011 at 1:08