DSL Add Root Element to Serialization

Question

I am looking for help to achieve the following

The Diagram represents a car, users can add engine and colour

when I view the XML it looks like this:

<Car>
  <Engine>BigEngine</Engine>
  <Colour>Pink</Colour>
</Car>

What I would like to do is to wrap the car inside 'vehicle', i.e

<Vehicle>
  <Car>
    <Engine>BigEngine</Engine>
    <Colour>Pink</Colour>
  </Car>
</Vehicle>

I am not sure of the best way to achieve this. I want the model explorer and the generated XML to be wrapped in 'vehicle' but for all other intents and purposes the user is working with a car only

Info: Visual Studio 2010, C# and DSL SDK for 2010

Answer 1

I have fixed this by the following. I am double deriving the Car class and in the Car serializer I am doing this:

Writing the extra elements:

  public partial class CarSerializer : CarSerializerBase
{
    public override void Write(SerializationContext serializationContext, ModelElement element, XmlWriter writer, RootElementSettings rootElementSettings)
    {
        // Adds the Model and LobSystem root elements to match that required by the SharePoint BCS
        writer.WriteStartElement("Garage");
        writer.WriteStartElement("Cars");
        base.Write(serializationContext, element, writer, rootElementSettings);
        writer.WriteEndElement();
        writer.WriteEndElement();
    }
}

To be able to read this back in I am overriding the Car LoadModel method in the SerializationHelper and where it is getting the reader I am reading the elements until I get to Car.

....

XmlReader reader = XmlReader.Create(fileStream, settings);
reader.MoveToContent();
while (!reader.EOF && !reader.Name.Equals("Car"))
{
   reader.Read();
}

reader = reader.ReadSubtree();

//    using (global::System.Xml.XmlReader reader = global::System.Xml.XmlReader.Create(fileStream, settings))
using (reader)
{

....