public static boolean isExplicitAllType(String[] types){
  return types != null && types.length == 1 && ALL.equals(types[0]);
}

public static boolean isExplicitAllType ( String [ ] types ) { return types != null && types . length == 1 && ALL . equals ( types [ 0 ] ) ; }
identifies whether the array containing type names given as argument explicitly refers to all types the empty or null array doesn ' t explicitly map to all types
