void function ( String arg0 ) { if ( arg0 != null ) { if ( ! arg0 . equals ( language ) ) { observer . handle ( new LanguageEvent ( this ) ) ; } } }
this method notify observer if language changed , but not initialized . concode_field_sep String qualification concode_elem_sep LanguageObserver observer concode_elem_sep Role role concode_elem_sep String language concode_elem_sep int id concode_field_sep String getLanguage concode_elem_sep void setRole concode_elem_sep String getQualification concode_elem_sep Role getRole concode_elem_sep void setId concode_elem_sep void setQualification concode_elem_sep int getId concode_elem_sep void setLanguage