String getRequiredElem ( ) { if ( m_requiredFound == null ) return null ; Enumeration elems = m_requiredFound . elements ( ) ; String s = "" ; boolean first = true ; while ( elems . hasMoreElements ( ) ) { if ( first ) first = false ; else s = s + ", " ; s = s + ( String ) elems . nextElement ( ) ; } return s ; }
Get required elements that were not found .