class CursorKind(object):
    """
    A CursorKind describes the kind of entity that a cursor points to.
    """

    # The unique kind objects, indexed by id.
    _kinds = {}
    _name_map = None

    def __init__(self, value):
        if value is in CursorKind._kinds:
            raise ValueError,'CursorKind already loaded'
        self.value = value
        CursorKind._kinds[value] = self
        CursorKind._name_map = None

    def from_param(self):
        return self.value

    @property
    def name(self):
        """Get the enumeration name of this cursor kind."""
        if self._name_map is None:
            self._name_map = {}
            for key,value in CursorKind._kinds.items():
                self._name_map[value] = key
        return self._name_map[self]