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# -*- coding: utf-8 -*-
"""
***************************************************************************
__init__.py
---------------------
Date : January 2007
Copyright : (C) 2007 by Martin Dobias
Email : wonder dot sk at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Martin Dobias'
__date__ = 'January 2007'
__copyright__ = '(C) 2007, Martin Dobias'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import sip
try:
apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime", "QUrl", "QVariant"]
for api in apis:
sip.setapi(api, 2)
except ValueError:
# API has already been set so we can't set it again.
pass
from qgis.core import QgsFeature, QgsGeometry
try:
# Add a __nonzero__ method onto QPyNullVariant so we can check for null values easier.
# >>> value = QPyNullVariant("int")
# >>> if value:
# >>> print "Not a null value"
from types import MethodType
from PyQt4.QtCore import QPyNullVariant
def __nonzero__(self):
return False
def __repr__(self):
return 'NULL'
def __eq__(self, other):
return isinstance(other, QPyNullVariant) or other is None
def __ne__(self, other):
return not isinstance(other, QPyNullVariant) and other is not None
QPyNullVariant.__nonzero__ = MethodType(__nonzero__, None, QPyNullVariant)
QPyNullVariant.__repr__ = MethodType(__repr__, None, QPyNullVariant)
QPyNullVariant.__eq__= MethodType(__eq__, None, QPyNullVariant)
QPyNullVariant.__ne__= MethodType(__ne__, None, QPyNullVariant)
# define a dummy QPyNullVariant instance NULL in qgis.core
# this is mainly used to compare against
# so one can write if feat['attr'] == NULL:
from qgis import core
core.NULL = QPyNullVariant( int )
except ImportError:
pass
def mapping_feature(feature):
geom = feature.geometry()
properties = {}
fields = [field.name() for field in feature.fields()]
properties = dict(zip(fields, feature.attributes()))
return {
'type' : 'Feature',
'properties' : properties,
'geometry' : geom.__geo_interface__}
def mapping_geometry(geometry):
geo = geometry.exportToGeoJSON()
# We have to use eval because exportToGeoJSON() gives us
# back a string that looks like a dictionary.
return eval(geo)
QgsFeature.__geo_interface__ = property(mapping_feature)
QgsGeometry.__geo_interface__ = property(mapping_geometry)
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