1. class AliObjectModel(CloudObjectModel):
    2.     """This class is aliyun object model
    4.     This class extend CloudObjectModel.
    6.     Attribute:
    7.         events:
    8.             Attribute:
    9.                 - object model event
    10.                 - attribute value data format
    11.                 {
    12.                     "sos_alert": {
    13.                         local_time: 1651136994000
    14.                     }
    15.                 }
    16.         properties:
    17.             Attribute:
    18.                 - object model property
    19.                 - attribute value data format
    20.                 {
    21.                     "GeoLocation": {
    22.                         "Longtitude": 0.0,
    23.                         "Latitude": 0.0,
    24.                         "Altitude": 0.0,
    25.                         "CoordinateSystem": 0
    26.                     }
    27.                 }
    28.     """
    30.     def __init__(self, om_file="/usr/aliyun_object_model.json"):
    31.         super().__init__(om_file)
    32.         self.init()
    34.     def __init_value(self, om_type):
    35.         if om_type in ("int", "enum", "date"):
    36.             om_value = 0
    37.         elif om_type in ("float", "double"):
    38.             om_value = 0.0
    39.         elif om_type == "bool":
    40.             om_value = True
    41.         elif om_type == "text":
    42.             om_value = ""
    43.         elif om_type == "array":
    44.             om_value = []
    45.         elif om_type == "struct":
    46.             om_value = {}
    47.         else:
    48.             om_value = None
    49.         return om_value
    51.     def __get_property(self, om_item):
    52.         om_item_key = om_item["identifier"]
    53.         om_item_type = om_item["dataType"]["type"]
    54.         om_item_val = self.__init_value(om_item_type)
    55.         if om_item_type == "struct":
    56.             om_item_struct = om_item["dataType"]["specs"]
    57.             om_item_val = {i["identifier"]: self.__init_value(i["dataType"]["type"]) for i in om_item_struct}
    58.         return om_item_key, om_item_val
    60.     def __init_properties(self, om_properties):
    61.         for om_property in om_properties:
    62.             om_property_key, om_property_val = self.__get_property(om_property)
    63.             setattr(self.properties, om_property_key, {om_property_key: om_property_val})
    65.     def __init_events(self, om_events):
    66.         for om_event in om_events:
    67.             om_event_key = om_event["identifier"]
    68.             om_event_out_put = om_event.get("outputData", [])
    69.             om_event_val = {}
    70.             if om_event_out_put:
    71.                 for om_property in om_event_out_put:
    72.                     om_property_key, om_property_val = self.__get_property(om_property)
    73.                     om_property_val[om_property_key] = om_property_val
    74.             setattr(self.events, om_event_key, {om_event_key: om_event_val})
    76.     def init(self):
    77.         with open(self.om_file, "rb") as f:
    78.             cloud_object_model = ujson.load(f)
    79.             self.__init_properties(cloud_object_model.get("properties", []))
    80.             self.__init_events(cloud_object_model.get("events", []))