1 """

     2 This module holds simple classes used by GeoQuery.convert_values

     3 to convert geospatial values from the database.

     4 """

     5 

     6 class BaseField(object):

     7     empty_strings_allowed = True

     8     def get_internal_type(self):

     9         "Overloaded method so OracleQuery.convert_values doesn't balk."

    10         return None

    11 

    12 class AreaField(BaseField):

    13     "Wrapper for Area values."

    14     def __init__(self, area_att):

    15         self.area_att = area_att

    16 

    17 class DistanceField(BaseField):

    18     "Wrapper for Distance values."

    19     def __init__(self, distance_att):

    20         self.distance_att = distance_att

    21 

    22 class GeomField(BaseField):

    23     """

    24     Wrapper for Geometry values.  It is a lightweight alternative to 

    25     using GeometryField (which requires a SQL query upon instantiation).

    26     """

    27     pass