void Write(MetaType metaType, Type actual, ProtoWriter dest, int recursionLevel)
{
if (metaType.Type != actual)
{
foreach (var subType in metaType.GetSubtypes().OrderBy(st => st.FieldNumber))
{
MetaType derivedType = subType.DerivedType;
if (derivedType.Type == metaType.Type)
{
continue;
}
if (Helpers.IsAssignableFrom(derivedType.Type, actual))
{
if (recursionLevel == 0)
{
if (derivedType.Type == actual)
{
ProtoWriter.WriteFieldHeaderComplete(WireType.Variant, dest);
ProtoWriter.WriteInt32(subType.FieldNumber + 1, dest);
return;
}
var token = ProtoWriter.StartSubItem(null, true, dest);
ProtoWriter.WriteFieldHeaderIgnored(WireType.Variant, dest);
ProtoWriter.WriteInt32(subType.FieldNumber + 1, dest);
Write(derivedType, actual, dest, 1);
ProtoWriter.EndSubItem(token, dest);
}
else
{
ProtoWriter.WriteFieldHeaderIgnored(WireType.Variant, dest);
ProtoWriter.WriteInt32(subType.FieldNumber + 1, dest);
Write(derivedType, actual, dest, recursionLevel + 1);
}
return;
}
}
}
if (recursionLevel == 0)
{
ProtoWriter.WriteFieldHeaderComplete(WireType.Variant, dest);
ProtoWriter.WriteInt32(0, dest);
}
}