public override BsonValue GetDiscriminator(Type nominalType, Type actualType)
{
var classMap = BsonClassMap.LookupClassMap(actualType);
if (actualType != nominalType || classMap.DiscriminatorIsRequired || classMap.HasRootClass)
{
if (classMap.HasRootClass && !classMap.IsRootClass)
{
var values = new List<BsonValue>();
for (; !classMap.IsRootClass; classMap = classMap.BaseClassMap)
{
values.Add(classMap.Discriminator);
}
values.Add(classMap.Discriminator); // add the root class's discriminator
return new BsonArray(values.Reverse<BsonValue>()); // reverse to put leaf class last
}
else
{
return classMap.Discriminator;
}
}
return null;
}
}