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PO
 

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    <p>You cannot just get type of packed class from message, but you can pass some type identifier along with serialized data. </p> <p>This is how it can be done in generic way for interface serialization.</p> <pre><code>class InterfaceSerializer&lt;T&gt; : MessagePackSerializer&lt;T&gt; { private Dictionary&lt;string, IMessagePackSerializer&gt; _serializers; public InterfaceSerializer() : this(SerializationContext.Default) { } public InterfaceSerializer(SerializationContext context) { _serializers = new Dictionary&lt;string, IMessagePackSerializer&gt;(); // Get all types that implement T interface var implementingTypes = System.Reflection.Assembly .GetExecutingAssembly() .DefinedTypes .Where(t =&gt; t.ImplementedInterfaces.Contains(typeof(T))); // Create serializer for each type and store it in dictionary foreach (var type in implementingTypes) { var key = type.Name; var value = MessagePackSerializer.Create(type, context); _serializers.Add(key, value); } } protected override void PackToCore(Packer packer, T objectTree) { IMessagePackSerializer serializer; string typeName = objectTree.GetType().Name; // Find matching serializer if (!_serializers.TryGetValue(typeName, out serializer)) { throw SerializationExceptions.NewTypeCannotSerialize(typeof(T)); } packer.PackArrayHeader(2); // Two-element array: packer.PackString(typeName); // 0: Type name serializer.PackTo(packer, objectTree); // 1: Packed object } protected override T UnpackFromCore(Unpacker unpacker) { IMessagePackSerializer serializer; string typeName; // Read type name and packed object if (!(unpacker.ReadString(out typeName) &amp;&amp; unpacker.Read())) { throw SerializationExceptions.NewUnexpectedEndOfStream(); } // Find matching serializer if (!_serializers.TryGetValue(typeName, out serializer)) { throw SerializationExceptions.NewTypeCannotDeserialize(typeof(T)); } // Unpack and return return (T)serializer.UnpackFrom(unpacker); } } </code></pre> <p>You need to register custom serializers for interfaces you want. For example, with default serialization context you do:</p> <pre><code>SerializationContext.Default.Serializers .Register&lt;ISegment&gt;(new InterfaceSerializer&lt;ISegment&gt;()); </code></pre> <p>Since the serialzer was registered, objects containing ISegment can be packed and unpacked as usual.</p> <pre><code>var packer = MessagePackSerializer.Create&lt;PathRequest&gt;(); packer.Pack(stream, somePathRequest); stream.Position = 0; var unpackedPathRequest = packer.Unpack(stream); </code></pre>
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    1. POusing MsgPack with Servicestack: how do I do KnownType?
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    1. USasavartsov
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    1. POusing MsgPack with Servicestack: how do I do KnownType?
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    1. COI'm no longer in a position to test this answer, but it looks good.
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    2. COThis will throw if any of your implementing types are abstract. Adding an extra condition to filter them out fixes that: `.Where(t => !t.IsAbstract);`
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      1. USCocowalla
 

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