def from_bytes(cls, source_bytes: bytes):
data = bytearray(source_bytes)
tag = data.pop(0)
if tag != cls.TAG:
raise ValueError(
f"Tag for GET request is not correct. Got {tag}, should be {cls.TAG}"
)
type_choice = enums.GetRequestType(data.pop(0))
if type_choice is not enums.GetRequestType.NORMAL:
raise ValueError(
"The data for the GetRequest is not for a GetRequestNormal")
invoke_id_and_priority = InvokeIdAndPriority.from_bytes(
data.pop(0).to_bytes(1, "big"))
cosem_attribute_data = data[:9]
cosem_attribute = cosem.CosemAttribute.from_bytes(cosem_attribute_data)
data = data[9:]
has_access_selection = bool(data.pop(0))
if has_access_selection:
access_selection = selective_access.AccessDescriptorFactory.from_bytes(
data)
else:
access_selection = None
return cls(
cosem_attribute=cosem_attribute,
invoke_id_and_priority=invoke_id_and_priority,
access_selection=access_selection,
)
def from_bytes(cls, source_bytes: bytes):
data = bytearray(source_bytes)
tag = data.pop(0)
if tag != cls.TAG:
raise ValueError(
f"Tag for GET request is not correct. Got {tag}, should be {cls.TAG}"
)
type_choice = enums.GetRequestType(data.pop(0))
if type_choice is not enums.GetRequestType.WITH_LIST:
raise ValueError(
"The data for the GetRequest is not for a GetRequestWithList")
invoke_id_and_priority = InvokeIdAndPriority.from_bytes(
data.pop(0).to_bytes(1, "big"))
number_of_items = data.pop(0)
cosem_atts = list()
for i in range(0, number_of_items):
# Not really happy with the format of this but it works fine.
c = cosem.CosemAttributeWithSelection.from_bytes(data)
cosem_atts.append(c)
data = data[len(c.to_bytes()):]
return cls(
cosem_attributes_with_selection=cosem_atts,
invoke_id_and_priority=invoke_id_and_priority,
)
def from_bytes(cls, source_bytes: bytes):
data = bytearray(source_bytes)
tag = data.pop(0)
if tag != cls.TAG:
raise ValueError(
f"Tag for GET request is not correct. Got {tag}, should be {cls.TAG}"
)
type_choice = enums.GetRequestType(data.pop(0))
if type_choice is not enums.GetRequestType.NORMAL:
raise ValueError(
"The data for the GetRequest is not for a GetRequestNormal")
decoder = AXdrDecoder(encoding_conf=cls.ENCODING_CONF)
out_dict = decoder.decode(data)
return cls(**out_dict)
def from_bytes(cls, source_bytes: bytes):
data = bytearray(source_bytes)
tag = data.pop(0)
if tag != cls.TAG:
raise ValueError(
f"Tag for GET request is not correct. Got {tag}, should be {cls.TAG}"
)
type_choice = enums.GetRequestType(data.pop(0))
if type_choice is not enums.GetRequestType.NEXT:
raise ValueError(
"The data for the GetRequest is not for a GetRequestNext")
invoke_id_and_priority = InvokeIdAndPriority.from_bytes(
data.pop(0).to_bytes(1, "big"))
assert len(data) == 4 # should only be block number left.
block_number = int.from_bytes(data, "big")
return cls(block_number, invoke_id_and_priority)
def from_bytes(source_bytes: bytes):
data = bytearray(source_bytes)
tag = data.pop(0)
if tag != GetRequestFactory.TAG:
raise ValueError(
f"Tag for GET request is not correct. Got {tag}, should be "
f"{GetRequestFactory.TAG}")
request_type = enums.GetRequestType(data.pop(0))
if request_type == enums.GetRequestType.NORMAL:
return GetRequestNormal.from_bytes(source_bytes)
elif request_type == enums.GetRequestType.NEXT:
return GetRequestNext.from_bytes(source_bytes)
elif request_type == enums.GetRequestType.WITH_LIST:
return GetRequestWithList.from_bytes(source_bytes)
else:
raise ValueError(
f"Received an enum request type that is not valid for "
f"GetRequest: {request_type}")