returns true if the given line is not null or if it is not a comment . concode_field_sep String fragmentFileName concode_elem_sep File[] documents concode_elem_sep Logger logger concode_elem_sep int i concode_elem_sep FragmentsFileFilter fileFilter concode_elem_sep File directory concode_field_sep Document<O> next concode_elem_sep Document<O> getDocument concode_elem_sep boolean hasNext concode_elem_sep boolean directoryOfDirectoriesMode concode_elem_sep O readObjectFromStringLine concode_elem_sep Iterator<Document<O>> getDocumentsFromDirectory concode_elem_sep void moveTapeToNextValidDocument concode_elem_sep void remove concode_elem_sep boolean accept