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Code Issues Releases Wiki Activity

check the tag list to see if it's an array (#263)

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Joel Bender
2019-04-02 17:59:29 -04:00
parent b8aad47e87
commit 57740c0217
1 changed files with 23 additions and 9 deletions
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32
samples/ReadPropertyAny.py
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@@ -20,6 +20,7 @@ from bacpypes.pdu import Address
from bacpypes.apdu import ReadPropertyRequest
from bacpypes.primitivedata import Tag, ObjectIdentifier
from bacpypes.constructeddata import ArrayOf
from bacpypes.app import BIPSimpleApplication
from bacpypes.local.device import LocalDeviceObject
@@ -72,27 +73,40 @@ class ReadPropertyAnyConsoleCmd(ConsoleCmd):
# do something for success
if iocb.ioResponse:
apdu = iocb.ioResponse
if _debug: ReadPropertyAnyConsoleCmd._debug(" - apdu: %r", apdu)
# peek at the value tag
value_tag = apdu.propertyValue.tagList.Peek()
if _debug: ReadPropertyAnyConsoleCmd._debug(" - value_tag: %r", value_tag)
try:
tag_list = apdu.propertyValue.tagList
# make sure that it is application tagged
if value_tag.tagClass != Tag.applicationTagClass:
sys.stdout.write("value is not application encoded\n")
# all tags application encoded
non_app_tags = [tag for tag in tag_list if tag.tagClass != Tag.applicationTagClass]
if non_app_tags:
raise RuntimeError("value has some non-application tags")
# all the same type
first_tag = tag_list[0]
other_type_tags = [tag for tag in tag_list[1:] if tag.tagNumber != first_tag.tagNumber]
if other_type_tags:
raise RuntimeError("all the tags must be the same type")
else:
# find the datatype
datatype = Tag._app_tag_class[value_tag.tagNumber]
datatype = Tag._app_tag_class[first_tag.tagNumber]
if _debug: ReadPropertyAnyConsoleCmd._debug(" - datatype: %r", datatype)
if not datatype:
raise TypeError("unknown datatype")
raise RuntimeError("unknown datatype")
# more than one then it's an array of these
if len(tag_list) > 1:
datatype = ArrayOf(datatype)
if _debug: ReadPropertyAnyConsoleCmd._debug(" - array: %r", datatype)
# cast out the value
value = apdu.propertyValue.cast_out(datatype)
if _debug: ReadPropertyAnyConsoleCmd._debug(" - value: %r", value)
sys.stdout.write("%s (%s)\n" % (value, datatype))
except RuntimeError as err:
sys.stdout.write("error: %s\n" % (err,))
sys.stdout.flush()