private String parseEntityAttribute(String fieldName){
  Matcher m=_fnPattern.matcher(fieldName);
  if (m.find()) {
    return m.group(1);
  }
  return null;
}

private String parseEntityAttribute ( String fieldName ) { Matcher m = _fnPattern . matcher ( fieldName ) ; if ( m . find ( ) ) { return m . group ( 1 ) ; } return null ; }
check whether this field is one entity attribute or not
