How do you handle an object of a specific type that can only be determined at runtime?

Question

How do you handle an object of a specific type that can only be determined at runtime?

Here's a query I have: We're working on an ASP.NET web application that is designed to cater to multiple clients.

The crucial aspect is the app's need to transform specific JSON strings into .NET object of type <T> so that it can be passed to a WCF service.

To achieve this, we are utilizing Newtonsoft.Json.Converter:

T input = JsonConvert.DeserializeObject<T>(jsonInput);

The challenge lies in the fact that the type <T> remains unknown during the design phase. However, following deserialization, there arises a requirement for a generic strongly-typed object to enable seamless utilization with the WCF service. This necessity emerges due to varying structures of the WCF service across different clients, leading to differing parameter requirements for each client.

var client = new CalcEngine.CalculatorClient();
var input = new CalcEngine.CalcInputTypes();
var result = client.Calculate(input);

In this case, the 'input' is identified as CalcEngine.CalcInputTypes. Notably, CalcEngine.CalcInputTypes could exhibit distinct structures for clientA and clientB.

What would be the optimal approach to resolving this?

Many thanks!

c#asp.net .net json jint

Answer 1

Answer №1

For instance, let's say you have two JSON messages as possible input:

{
  "category": "Fruit",
  "details": {
    "name": "Apple"
  }
}

{
  "category": "Appliance",
  "details": {
    "appliance_id": 12,
    "features": ["smart", "energy efficient"]
  }
}

To handle these incoming messages, you can examine the category field and then deserialize the details to a known object in Python. You can accomplish this using json.loads:

data = json.loads(json_input)
category = data["category"]
if category == "Fruit":
    fruit = Fruit(**data["details"])
elif category == "Appliance":
    appliance = Appliance(**data["details"])

Answer 2

For instance, let's say you have two JSON messages as possible input:

{
  "category": "Fruit",
  "details": {
    "name": "Apple"
  }
}

{
  "category": "Appliance",
  "details": {
    "appliance_id": 12,
    "features": ["smart", "energy efficient"]
  }
}

To handle these incoming messages, you can examine the category field and then deserialize the details to a known object in Python. You can accomplish this using json.loads:

data = json.loads(json_input)
category = data["category"]
if category == "Fruit":
    fruit = Fruit(**data["details"])
elif category == "Appliance":
    appliance = Appliance(**data["details"])

How do you handle an object of a specific type that can only be determined at runtime?

Answer №1

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