returns a StructType representing Frame
Used in conjunction with "org.apache.spark.sql.functions.from_json" which Parses a column containing a JSON string into a StructType with the specified schema. Returns null, in the case of an unparseable string.

the structType corresponds to Frame json, see com.nvidia.mdx.core.schema.frame.jFrame

An example with SGIE  where object-type is Vehicle
{
   "version": "4.0",
   "id": "frame-id",
   "@timestamp": "2018-04-11T04:59:59.828Z",
   "sensorId": "sensor-id",
   "objects": [
   "957|1834|150|1918|215|Vehicle|#|sedan|Bugatti|M|blue|CA 444|California|0.8",
   "..........."

]
}

returns a StructType representing Message
Used in conjunction with "org.apache.spark.sql.functions.from_json" which Parses a column containing a JSON string into a StructType with the specified schema. Returns null, in the case of an unparseable string.

the structType corresponds to Message json, see com.nvidia.mdx.core.schema.jMessage

An example of Message
{
"messageid": "0357d37b-122c-4591-b5a6-d34ffd6e9a22",
"mdsversion": "1.0",
"@timestamp": "2018-01-06T08:18:29.811Z",
"place":
{
"id": "1",
"name": "endeavor",
"type": "building/garage",
"location":
{
"lat": 37.37060687475246,
"lon": -121.9672466762127,
"alt": 10.0
},

"parkingSpot":
{
"id": "Spot-649",
"type": "LEV",
"level": "P1",
"coordinate":
{
"x": -15.80039606856171,
"y": -42.71209355187643,
"z": 3.0
}
}
},

"sensor":
{
"id": "Cam_24",
"type": "Camera",
"location":
{
"lat": 37.37097419504406,
"lon": -121.96695453400918,
"alt": 77.83
},

"description": "Camera Cam_24",
"coordinate":
{
"x": -25.79694075531654,
"y": -40.81336573354596,
"z": 1.0
}
},

"analyticsModule":
{
"id": "AM-id",
"description": "Parking Detection",
"source": "OpenALR",
"version": "1.0"
},

"object":
{
"id": "931",
"vehicle":
{
"type": "SUV/Van",
"make": "Jeep",
"model": "Grand Cherokee",
"color": "blue",
"confidence": 0.6303990104266417,
"license": "GYM0M3",
"licenseState": "CA"
},

"bbox":
{
"topleftx": -15.80039606856171,
"toplefty": -42.71209355187643,
"bottomrightx": -15.80039606856171,
"bottomrighty": -42.71209355187643
},

"signature":
[
0.9659786686200269,
0.26463120365924153,
0.4939636991282117
],

"speed": 0.0,
"direction": 72.90656542385659,
"orientation": 72.90656542385659,
"location":
{
"lat": 37.37099128359443,
"lon": -121.96706774169897,
"alt": 38.14
},

"coordinate":
{
"x": -15.80039606856171,
"y": -42.71209355187643,
"z": 3.0
}
},

"event":
{
"id": "event-id",
"type": "parked"
},

"videoPath": "http://metrovideodev/play.html?videoPath=./videos/cam_80_capture-2017-11-07_17-12-30.mp4"
}

returns a StructType representing Puck
Used in conjunction with "org.apache.spark.sql.functions.from_json" which Parses a column containing a JSON string into a StructType with the specified schema. Returns null, in the case of an unparseable string.

the structType corresponds to Puck json, see com.nvidia.mdx.core.schema.puck.Puck

An example of Puck json

{
"SensorId": "0080000004003b42",
"GatewayTime": "2018-04-18T21:43:19.317Z",
"SENtralTime": 0,
"PacketCounter": 32,
"ServerTime": "2018-04-18T21:43:19.317Z",
"LoraWan":
{
"fCnt": 130,
"loRaSNR": 8.8,
"rssi": -91,
"gwCount": 2,
"rxInfo":
[
{
"mac": "00800000a00022f0",
"rssi": -91,
"loRaSNR": 8.8,
"name": "00800000a00022f0",
"latitude": 0,
"longitude": 0,
"altitude": 0
},

{
"mac": "00800000a0001f92",
"rssi": -104,
"loRaSNR": 6.2,
"name": "00800000a0001f92",
"latitude": 0,
"longitude": 0,
"altitude": 0
}
],

"txInfo":
{
"frequency": 903500000,
"dataRate":
{
"modulation": "LORA",
"bandwidth": 125,
"spreadFactor": 9
},

"adr": false,
"codeRate": "4/5"
}
},

"MetaError": null,
"topic": "iot/KeepAlive",
"CarPresence": 3,
"Battery": 3.645,
"Temperature": 16,
"EventCounter": 0,
"Latitude": 38.4209,
"Longitude": -122.755257
}