X @sdZddlmZddlmZddlmZddlmZddl m Z m Z Gddde Z Gd d d e ZGd d d e ZGd ddee ZGddde ZdS)zR This module holds simple classes to convert geospatial values from the database. )unicode_literals)Decimal)GeoSelectFormatMixin)Geometry)AreaDistancec@s.eZdZdZddZddZdS) BaseFieldTcCs |jgS)N) from_db_value)self connectionr Y/home/ubuntu/projects/ifolica/build/django/django/contrib/gis/db/models/sql/conversion.pyget_db_convertersszBaseField.get_db_converterscCs ||fS)Nr )r compilerZsqlparamsr r r select_formatszBaseField.select_formatN)__name__ __module__ __qualname__Zempty_strings_allowedrrr r r r rs  rc@s=eZdZdZdddZddZddZdS) AreaFieldzWrapper for Area values.NcCs ||_dS)N)area_att)r rr r r __init__szAreaField.__init__cCsq|jjr!|dkr!d}nt|tr?t|}n|dk rm|jrmti||j6}n|S)N)featuresZ!interprets_empty_strings_as_nulls isinstancerfloatrr)r value expressionr contextr r r r s zAreaField.from_db_valuecCsdS)Nrr )r r r r get_internal_type)szAreaField.get_internal_type)rrr__doc__rr rr r r r rs  rc@s:eZdZdZddZddZddZdS) DistanceFieldzWrapper for Distance values.cCs ||_dS)N) distance_att)r r"r r r r/szDistanceField.__init__cCs)|dk r%ti||j6}n|S)N)rr")r rrr rr r r r 2s zDistanceField.from_db_valuecCsdS)Nr!r )r r r r r7szDistanceField.get_internal_typeN)rrrr rr rr r r r r!-s   r!c@s4eZdZdZdZddZddZdS) GeomFieldz Wrapper for Geometry values. It is a lightweight alternative to using GeometryField (which requires an SQL query upon instantiation). NcCs|dk rt|}n|S)N)r)r rrr rr r r r Cs zGeomField.from_db_valuecCsdS)NZ GeometryFieldr )r r r r rHszGeomField.get_internal_type)rrrr Z geom_typer rr r r r r#;s  r#c@s.eZdZdZddZddZdS)GMLFieldzQ Wrapper for GML to be used by Oracle to ensure Database.LOB conversion. cCsdS)Nr$r )r r r r rQszGMLField.get_internal_typecCs|S)Nr )r rrr rr r r r TszGMLField.from_db_valueN)rrrr rr r r r r r$Ls  r$N)r __future__rdecimalrZ#django.contrib.gis.db.models.fieldsrZ#django.contrib.gis.geometry.backendrZdjango.contrib.gis.measurerrobjectrrr!r#r$r r r r s