public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
JObject measurement = JObject.Load(reader);
var measurementType = measurement["measurement_type"].Value <String>();
var convertedMeasurement = measurement.ToObject <Measurement>();
object measurementVal = null;
switch (measurementType)
{
case "weight":
{
measurementVal = new WeightValueInfo();
serializer.Populate(measurement["value_info"].CreateReader(), measurementVal);
convertedMeasurement.value_info = (WeightValueInfo)measurementVal;
break;
}
case "pulse":
{
measurementVal = new PulseValueInfo();
serializer.Populate(measurement["value_info"].CreateReader(), measurementVal);
convertedMeasurement.value_info = (PulseValueInfo)measurementVal;
break;
}
case "blood_pressure":
{
measurementVal = new BloodPressureValueInfo();
// set custom BPValueContractResolver contract resolver
//serializer.ContractResolver = new BPValueContractResolver();
//serializer.Converters.Insert(0, new BloodPressureValueConverter());
//JsonSerializer bpValSerializer = JsonSerializer.CreateDefault();
//bpValSerializer.Converters.Add(new BloodPressureValueConverter());
serializer.Populate(measurement["value_info"].CreateReader(), measurementVal);
convertedMeasurement.value_info = (BloodPressureValueInfo)measurementVal;
break;
}
default:
throw new ArgumentException("Invalid measurement type: " + measurementType);
}
return(convertedMeasurement);
}
public static void Main(string[] args)
{
Console.WriteLine("Testing serialization");
string jsonBPStr = @"{""measurement_type"": ""blood_pressure"",
""unit_type"" : ""mmHg"",
""timestamp"": 1505827500,
""user"": ""/api/v1/user/2/"",
""device"": ""/api/v1/device/1/"",
""value_info"": {""systolic"" : 117, ""diastolic"": 67, ""heartrate"": 73 } }";
string jsonWeightStr = @"{""measurement_type"": ""weight"",
""unit_type"" : ""mmHg"",
""timestamp"": 1505827500,
""user"": ""/api/v1/user/2/"",
""device"": ""/api/v1/device/1/"",
""value_info"": {""weight"" : 74.1} }";
string jsonPulseStr = @"{""measurement_type"": ""pulse"",
""unit_type"" : ""mmHg"",
""timestamp"": 1505827500,
""user"": ""/api/v1/user/2/"",
""device"": ""/api/v1/device/1/"",
""value_info"": {""value"": 65 } }";
string eventJsonStr = @"{""category"": ""USER_ENVIRONMENT"",
""content"":
{""name"": ""presence"",
""value_type"": ""complex"",
""value"": {""alarm_motion"":false, ""sensor_luminance"":64, ""sensor_temperature"":27.5, ""alarm_tamper"":false,""battery_level"":85}},
""annotations"": {""timestamp"":1507902069, ""source"":{""gateway"":""/api/v1/gateway/1/"", ""sensor"": ""/api/v1/device/9/""}
}}";
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.Converters.Add(new MeasurementConverter());
var bpObj = JsonConvert.DeserializeObject <Measurement>(jsonBPStr, settings);
var weightObj = JsonConvert.DeserializeObject <Measurement>(jsonWeightStr, settings);
var pulseObj = JsonConvert.DeserializeObject <Measurement>(jsonPulseStr, settings);
try
{
var eventObj = JsonConvert.DeserializeObject <Event>(eventJsonStr);
Console.WriteLine("Sensor source is: " + eventObj.annotations.source["sensor"]);
Console.WriteLine("Motion detected status: " + eventObj.content.val["alarm_motion"]);
}
catch (JsonException ex)
{
Console.WriteLine(ex);
}
BloodPressureValueInfo bpVal = (BloodPressureValueInfo)bpObj.value_info;
Console.WriteLine("systolic: " + bpVal.systolic + " diastolic: " + bpVal.diastolic + " pulse: " + bpVal.pulse);
WeightValueInfo weightVal = (WeightValueInfo)weightObj.value_info;
Console.WriteLine("weight: " + weightVal.Value);
PulseValueInfo pulseVal = (PulseValueInfo)pulseObj.value_info;
Console.WriteLine("pulse: " + pulseVal.Value);
Console.WriteLine("Reseerialized Measurement of type: " + bpObj.measurement_type);
Console.WriteLine(JsonConvert.SerializeObject(bpObj));
Console.WriteLine("Reseerialized Measurement of type: " + weightObj.measurement_type);
Console.WriteLine(JsonConvert.SerializeObject(weightObj));
Console.WriteLine("Reseerialized Measurement of type: " + pulseObj.measurement_type);
Console.WriteLine(JsonConvert.SerializeObject(pulseObj));
Console.ReadLine();
}
