// @nuget: Oss.DCodec -Version 0.4.215

using System;

using Oss.DCodec;

​

// This example shows how to do а partial decoding, e.g. when the application  

// needs only a few fields (out of a big message) and the rest can be ignored. 

// Let's consider this schema as "big", with "lots" of fields, while the app 

// needs only Rocket.Speed to perform its logic. Also note, that the schema

// can be extended later by adding fields in Rocket.Other.

//

// World-Schema DEFINITIONS EXPLICIT TAGS::= BEGIN         

//   Rocket ::= SEQUENCE                                     

//   {                                                     

//      name        [1] UTF8String,                       

//      speed       [2] INTEGER,                       

//      other       [3] SEQUENCE { ... } -- extensible

//   }                                                     

// END                                                     

​

// Data type to decode into (bindings)

public class Essentials

{

    // not interested in 

    //   public string Name { get; set; }

    //   public Stuff other { get; set; }

    // interested in

    public int Speed { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        // Partial decoding - when only parts of the message are decoded

        var myCodec = new JsonCodec();

​

        // Load the schema (dkey is generated with http://asn1.io/dynamic)

        var mySchema = new DSchema("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");

​

        // message includes lots of stuff, but only Speed is essential for this app

        string msg = "{ 'Name':'Gemini', 'Speed':45000,  'Other':{'id':'x1234', 'size':20, 'Payload':true, 'Launches':[1964,1965,1966]} }";

​

        // bindings and the message partially match the schema, so conflicts are expected (and handled).

        myCodec.DecoderOptions.ConflictHandler = MyHandler;

        var rocket = myCodec.Decode<Essentials>(msg,  mySchema.FindType("World-Schema.Rocket"));

​

        if (rocket.Speed > 40000)

            Console.WriteLine("Orbiting...");

        // Output:

        //    New field:   World-Schema.Rocket.other.id

        //    New field:   World-Schema.Rocket.other.size

        //    New field:   World-Schema.Rocket.other.Payload

        //    New field:   World-Schema.Rocket.other.Launches

        //    Orbiting...

    }

    public static DResponse MyHandler(DConflict conflict)

    {

        switch (conflict.Kind)

        {

                // Ignore fields that are not essential

            case DConflictKind.BindingMissing:

                return DResponse.Drop;

​

                // Log fields that are new (do not match the schema)

            case DConflictKind.SchemaMissing:

                System.Console.WriteLine("New field:   " + conflict.Reference); 

                return DResponse.Continue;

​

                // Break on any other kind of conflict. DOperationInterupted will be thrown.

            default:

                return DResponse.Break; 

        }

    }

}