def _Geopoint(self, return_type, *nodes):
if return_type == search_util.EXPRESSION_RETURN_TYPE_TEXT:
raise _ExpressionError(
'Geopoint cannot be converted to a text type')
latitude, longitude = (self._Eval(node, document_pb.FieldValue.NUMBER)
for node in nodes)
return geo_util.LatLng(latitude, longitude)
def _GetFieldValue(cls, field):
"""Returns the value of a field as the correct type.
Args:
field: The field whose value is extracted. If the given field is None, this
function also returns None. This is to make it easier to chain with
GetFieldInDocument().
Returns:
The value of the field with the correct type (float for number fields,
datetime.datetime for date fields, etc).
Raises:
TypeError: if the type of the field isn't recognized.
"""
if not field:
return None
value_type = field.value().type()
if value_type in search_util.TEXT_DOCUMENT_FIELD_TYPES:
return field.value().string_value()
if value_type == document_pb.FieldValue.DATE:
value = field.value().string_value()
return search_util.DeserializeDate(value)
if value_type == document_pb.FieldValue.NUMBER:
value = field.value().string_value()
return float(value)
if value_type == document_pb.FieldValue.GEO:
value = field.value().geo()
return geo_util.LatLng(value.lat(), value.lng())
raise TypeError('No conversion defined for type %s' % value_type)
def _ResolveDistanceArg(self, node):
if node.getType() == QueryParser.VALUE:
return query_parser.GetQueryNodeText(node)
if node.getType() == QueryParser.FUNCTION:
name, args = node.children
if name.getText() == 'geopoint':
lat, lng = (float(query_parser.GetQueryNodeText(v)) for v in args.children)
return geo_util.LatLng(lat, lng)
return None
def IsMatch(self, field_values, op):
self._CheckOp(op)
for field_value in field_values:
geo_pb = field_value.geo()
geopoint = geo_util.LatLng(geo_pb.lat(), geo_pb.lng())
if self._IsDistanceMatch(geopoint, op):
return True
return False
def IsMatch(self, field_values, op):
self._CheckOp(op)
if not field_values:
return False
return self._IsDistanceMatch(min([
geo_util.LatLng(field_value.geo().lat(), field_value.geo().lng())
- self._geopoint for field_value in field_values]), op)
