def __init__(self):
"""
Initializes variables and registers the 'attribute_changed' signal.
It is neccessary for each subclass to call CONObject's __init__, failing to do so
will prevent the subclass to use signals and attributes.
"""
# register our class, if not registered before
if self.__class__ not in CONObject._class_registry:
CONObject._register_class(self.__class__)
# init signal callback lists
if "_callbacks" not in self.__class__.__dict__:
self.__class__._callbacks = {}
for signal in CONObject._class_registry[self.__class__]["callbacks"]:
self.__class__._callbacks[signal] = []
# init attribute list
if "_attributes" not in self.__class__.__dict__:
self.__class__._attributes = CONObject._class_registry[self.__class__]["attributes"].copy()
# try calling any _on_..._changed method
mname = "_on_" + name + "_changed"
if hasattr(self, mname):
method = getattr(self, mname)
method(oldvalue, value)
self.raise_signal("attribute_changed", name, oldvalue, value)
def __getattr__(self, name):
"""
Return the value of the attribute.
When the object's uuid is requested but the object has no uuid yet, the uuid is created.
"""
if name[0:1] == "_":
return self.__class__.__dict__[name]
else:
if (name == "uuid") and (self.__class__.__dict__["_attributes"]["uuid"] == None):
self.__class__.__dict__["_attributes"]["uuid"] = uuid.uuid4()
return self.__class__.__dict__["_attributes"][name]
def get_attribute_list(self):
"""
Returns the list of attributes that are managed by CONObject.
"""
return self.__class__._attributes.keys()
CONObject.register_attribute_type("CONBorg", CONBorg.object_serializer, CONBorg.object_deserializer)