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POProtobuf-net .proto file generation for inheritance
 

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  1. POProtobuf-net .proto file generation for inheritance
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    <p>I am prototyping Protobuf-net to replace some of our existing C# code which is currently using [Datacontract] to Serialize objects to Xml.</p> <p>Using protobuffer we can easily share data with Java. I am thus very interested in the .proto file generation of Protobuf-net. This worked well for almost all the use cases I tested so far.</p> <p>But now with inheritance it's a different ball game. The .proto file that's been generated for the Inherited classes is very simple - not including any of the fields for the Base Class.</p> <p>The inheritance itself is working fine in C# - I can read the generated byte stream (see my test below). So the internal binary stream contains all the fields of the base class</p> <p>The generated .proto:</p> <pre><code>message ProtoScholar { optional string Subject = 1; } </code></pre> <p>If I can understand how the byte stream is written out I can create the corresponding .proto file by hand. </p> <p>Anyone got any experience in creating a .proto file for inheritance using protobuf-net? </p> <p>Any info on how the data stream is being created for inheritance will be great.</p> <p>My DataModel is as follows:</p> <pre><code>[DataContract] [ProtoInclude(7, typeof(ProtoScholar))] public class ProtoAlien { [DataMember(Order = 1)] public string Name { get; set; } [DataMember(Order = 2)] public double? Average { get; set; } [DataMember(Order = 3)] public int? HowMuch { get; set; } [DataMember(Order = 4, IsRequired = true)] public Height Length { get; set; } [DataMember(Order = 5, IsRequired = true)] public Character Personality { get; set; } [DataMember(Order = 6, IsRequired = true)] public DateTime When { get; set; } public enum Height { Short = 1, Medium, Tall } public enum Character : long { Wasp = 1717986918, BumbleBee, WorkerBee, Hornet, Queen } } [DataContract()] public class ProtoScholar : ProtoAlien { [DataMember(Order=1)] public string Subject { get; set; } } </code></pre> <p>My NUnit test looks like this:</p> <pre><code>[Test] public void TestInheritanceSupport() { var protoBuffer = new ProtoScholar { Name = "Ben11", HowMuch = null, Length = ProtoAlien.Height.Tall, Personality = ProtoAlien.Character.WorkerBee, When = new DateTime(2010, 4, 1, 2, 33, 56, 392), Subject = "Alien Economics" }; using (var ms = new MemoryStream()) { var proto = Serializer.GetProto&lt;ProtoScholar&gt;(); Console.WriteLine(proto); //Serialize to a Memory Stream Serializer.Serialize(ms, protoBuffer); Console.WriteLine(ms.Length); ms.Position = 0; var deserializedProtoBuffer = Serializer.Deserialize&lt;ProtoScholar&gt;(ms); Assert.AreEqual("Ben11", deserializedProtoBuffer.Name); Assert.Null(deserializedProtoBuffer.HowMuch); Assert.AreEqual(ProtoAlien.Height.Tall, deserializedProtoBuffer.Length); Assert.AreEqual(ProtoAlien.Character.WorkerBee, deserializedProtoBuffer.Personality); Assert.AreEqual(new DateTime(2010, 4, 1, 2, 33, 56, 392), deserializedProtoBuffer.When); Assert.AreEqual("Alien Economics", deserializedProtoBuffer.Subject); } } </code></pre>
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