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/*
* $Id: ogr_python.i 25899 2013-04-11 18:07:32Z rouault $
*
* python specific code for ogr bindings.
*/
%feature("autodoc");
%init %{
if ( OGRGetDriverCount() == 0 ) {
OGRRegisterAll();
}
%}
/*%{
#if PY_MINOR_VERSION >= 4
#include "datetime.h"
#define USE_PYTHONDATETIME 1
#endif
%}
*/
%include "ogr_layer_docs.i"
%include "ogr_datasource_docs.i"
%include "ogr_driver_docs.i"
%include "ogr_feature_docs.i"
%include "ogr_featuredef_docs.i"
%include "ogr_fielddef_docs.i"
%include "ogr_geometry_docs.i"
%rename (GetDriverCount) OGRGetDriverCount;
%rename (GetOpenDSCount) OGRGetOpenDSCount;
%rename (SetGenerate_DB2_V72_BYTE_ORDER) OGRSetGenerate_DB2_V72_BYTE_ORDER;
%rename (RegisterAll) OGRRegisterAll();
%include "python_exceptions.i"
%include "python_strings.i"
%extend OGRDataSourceShadow {
%pythoncode {
def Destroy(self):
"Once called, self has effectively been destroyed. Do not access. For backwards compatiblity only"
_ogr.delete_DataSource( self )
self.thisown = 0
def Release(self):
"Once called, self has effectively been destroyed. Do not access. For backwards compatiblity only"
_ogr.delete_DataSource( self )
self.thisown = 0
def Reference(self):
"For backwards compatibility only."
return self.Reference()
def Dereference(self):
"For backwards compatibility only."
self.Dereference()
def __len__(self):
"""Returns the number of layers on the datasource"""
return self.GetLayerCount()
def __getitem__(self, value):
"""Support dictionary, list, and slice -like access to the datasource.
ds[0] would return the first layer on the datasource.
ds['aname'] would return the layer named "aname".
ds[0:4] would return a list of the first four layers."""
if isinstance(value, slice):
output = []
for i in xrange(value.start,value.stop,value.step):
try:
output.append(self.GetLayer(i))
except OGRError: #we're done because we're off the end
return output
return output
if isinstance(value, int):
if value > len(self)-1:
raise IndexError
return self.GetLayer(value)
elif isinstance(value, str):
return self.GetLayer(value)
else:
raise TypeError('Input %s is not of String or Int type' % type(value))
def GetLayer(self,iLayer=0):
"""Return the layer given an index or a name"""
if isinstance(iLayer, str):
return self.GetLayerByName(str(iLayer))
elif isinstance(iLayer, int):
return self.GetLayerByIndex(iLayer)
else:
raise TypeError("Input %s is not of String or Int type" % type(iLayer))
def DeleteLayer(self, value):
"""Deletes the layer given an index or layer name"""
if isinstance(value, str):
for i in range(self.GetLayerCount()):
name = self.GetLayer(i).GetName()
if name == value:
return _ogr.DataSource_DeleteLayer(self, i)
raise ValueError("Layer %s not found to delete" % value)
elif isinstance(value, int):
return _ogr.DataSource_DeleteLayer(self, value)
else:
raise TypeError("Input %s is not of String or Int type" % type(value))
}
}
%extend OGRLayerShadow {
%pythoncode {
def Reference(self):
"For backwards compatibility only."
pass
def Dereference(self):
"For backwards compatibility only."
pass
def __len__(self):
"""Returns the number of features in the layer"""
return self.GetFeatureCount()
# To avoid __len__ being called when testing boolean value
# which can have side effects (#4758)
def __nonzero__(self):
return True
# For Python 3 compat
__bool__ = __nonzero__
def __getitem__(self, value):
"""Support list and slice -like access to the layer.
layer[0] would return the first feature on the layer.
layer[0:4] would return a list of the first four features."""
if isinstance(value, slice):
import sys
output = []
if value.stop == sys.maxint:
#for an unending slice, sys.maxint is used
#We need to stop before that or GDAL will write an
##error to stdout
stop = len(self) - 1
else:
stop = value.stop
for i in xrange(value.start,stop,value.step):
feature = self.GetFeature(i)
if feature:
output.append(feature)
else:
return output
return output
if isinstance(value, int):
if value > len(self)-1:
raise IndexError
return self.GetFeature(value)
else:
raise TypeError("Input %s is not of IntType or SliceType" % type(value))
def CreateFields(self, fields):
"""Create a list of fields on the Layer"""
for i in fields:
self.CreateField(i)
def __iter__(self):
return self
def next(self):
feature = self.GetNextFeature()
if not feature:
raise StopIteration
else:
return feature
def schema(self):
output = []
defn = self.GetLayerDefn()
for n in range(defn.GetFieldCount()):
output.append(defn.GetFieldDefn(n))
return output
schema = property(schema)
}
}
%extend OGRFeatureShadow {
%pythoncode {
def Reference(self):
pass
def Dereference(self):
pass
def Destroy(self):
"Once called, self has effectively been destroyed. Do not access. For backwards compatiblity only"
_ogr.delete_Feature( self )
self.thisown = 0
def __cmp__(self, other):
"""Compares a feature to another for equality"""
return self.Equal(other)
def __copy__(self):
return self.Clone()
# This makes it possible to fetch fields in the form "feature.area".
# This has some risk of name collisions.
def __getattr__(self, key):
"""Returns the values of fields by the given name"""
if key == 'this':
return self.__dict__[key]
try:
return self.GetField(key)
except:
raise AttributeError(key)
# This makes it possible to set fields in the form "feature.area".
# This has some risk of name collisions.
def __setattr__(self, key, value):
"""Set the values of fields by the given name"""
if key != 'this' and key != 'thisown' and self.GetFieldIndex(key) != -1:
return self.SetField2(key,value)
else:
self.__dict__[key] = value
# This makes it possible to fetch fields in the form "feature['area']".
def __getitem__(self, key):
"""Returns the values of fields by the given name / field_index"""
return self.GetField(key)
# This makes it possible to set fields in the form "feature['area'] = 123".
def __setitem__(self, key, value):
"""Returns the value of a field by field name / index"""
self.SetField2( key, value )
def GetField(self, fld_index):
if isinstance(fld_index, str):
fld_index = self.GetFieldIndex(fld_index)
if (fld_index < 0) or (fld_index > self.GetFieldCount()):
raise ValueError("Illegal field requested in GetField()")
if not (self.IsFieldSet(fld_index)):
return None
fld_type = self.GetFieldType(fld_index)
if fld_type == OFTInteger:
return self.GetFieldAsInteger(fld_index)
if fld_type == OFTReal:
return self.GetFieldAsDouble(fld_index)
if fld_type == OFTStringList:
return self.GetFieldAsStringList(fld_index)
if fld_type == OFTIntegerList:
return self.GetFieldAsIntegerList(fld_index)
if fld_type == OFTRealList:
return self.GetFieldAsDoubleList(fld_index)
## if fld_type == OFTDateTime or fld_type == OFTDate or fld_type == OFTTime:
# return self.GetFieldAsDate(fld_index)
# default to returning as a string. Should we add more types?
return self.GetFieldAsString(fld_index)
def SetField2(self, fld_index, value):
if isinstance(fld_index, str):
fld_index = self.GetFieldIndex(fld_index)
if value is None:
self.UnsetField( fld_index )
return
if isinstance(value,list):
if len(value) == 0:
self.UnsetField( fld_index )
return
if isinstance(value[0],int):
self.SetFieldIntegerList(fld_index,value)
return
elif isinstance(value[0],float):
self.SetFieldDoubleList(fld_index,value)
return
elif isinstance(value[0],str):
self.SetFieldStringList(fld_index,value)
return
else:
raise TypeError( 'Unsupported type of list in SetField2()' )
try:
self.SetField( fld_index, value )
except:
self.SetField( fld_index, str(value) )
return
def keys(self):
names = []
for i in range(self.GetFieldCount()):
fieldname = self.GetFieldDefnRef(i).GetName()
names.append(fieldname)
return names
def items(self):
keys = self.keys()
output = {}
for key in keys:
output[key] = self.GetField(key)
return output
def geometry(self):
return self.GetGeometryRef()
def ExportToJson(self, as_object = False, options = None):
"""Exports a GeoJSON object which represents the Feature. The
as_object parameter determines whether the returned value
should be a Python object instead of a string. Defaults to False.
The options parameter is passed to Geometry.ExportToJson()"""
try:
import simplejson
except ImportError:
try:
import json as simplejson
except ImportError:
raise ImportError("Unable to import simplejson or json, needed for ExportToJson.")
geom = self.GetGeometryRef()
if geom is not None:
if options is None:
options = []
geom_json_string = geom.ExportToJson(options = options)
geom_json_object = simplejson.loads(geom_json_string)
else:
geom_json_object = None
output = {'type':'Feature',
'geometry': geom_json_object,
'properties': {}
}
fid = self.GetFID()
if fid != NullFID:
output['id'] = fid
for key in self.keys():
output['properties'][key] = self.GetField(key)
if not as_object:
output = simplejson.dumps(output)
return output
}
}
%extend OGRGeometryShadow {
%pythoncode {
def Destroy(self):
self.__swig_destroy__(self)
self.__del__()
self.thisown = 0
def __str__(self):
return self.ExportToWkt()
def __reduce__(self):
return (self.__class__, (), self.ExportToWkb())
def __setstate__(self, state):
result = CreateGeometryFromWkb(state)
self.this = result.this
def __iter__(self):
self.iter_subgeom = 0
return self
def next(self):
if self.iter_subgeom < self.GetGeometryCount():
subgeom = self.GetGeometryRef(self.iter_subgeom)
self.iter_subgeom += 1
return subgeom
else:
raise StopIteration
}
}
%extend OGRFieldDefnShadow {
%pythoncode {
width = property(GetWidth, SetWidth)
type = property(GetType, SetType)
precision = property(GetPrecision, SetPrecision)
name = property(GetName, SetName)
justify = property(GetJustify, SetJustify)
}
}
%extend OGRFeatureDefnShadow {
%pythoncode {
def Destroy(self):
"Once called, self has effectively been destroyed. Do not access. For backwards compatiblity only"
_ogr.delete_FeatureDefn( self )
self.thisown = 0
}
}
%extend OGRFieldDefnShadow {
%pythoncode {
def Destroy(self):
"Once called, self has effectively been destroyed. Do not access. For backwards compatiblity only"
_ogr.delete_FieldDefn( self )
self.thisown = 0
}
}
%import typemaps_python.i
%include "callback.i"
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