def get_fields_class(self, class_name):
        """
        Return all fields of a specific class

        :param class_name: the class name
        :type class_name: string

        :rtype: a list with :class:`EncodedField` objects
        """
        l = []
        for i in self.get_classes():
            for j in i.get_fields():
                if class_name == j.get_class_name():
                    l.append(j)

        return l