public XamlObjectReader(object instance, XamlSchemaContext schemaContext, XamlObjectReaderSettings settings)
{
if (schemaContext == null)
{
throw new ArgumentNullException("schemaContext");
}
// FIXME: special case? or can it be generalized? In .NET, For Type instance Instance returns TypeExtension at root StartObject, while for Array it remains to return Array.
if (instance is Type)
{
instance = new TypeExtension((Type)instance);
}
// See also Instance property for this weirdness.
this.root_raw = instance;
instance = TypeExtensionMethods.GetExtensionWrapped(instance);
this.root = instance;
sctx = schemaContext;
this.settings = settings ?? new XamlObjectReaderSettings();
// check type validity. Note that some checks also needs done at Read() phase. (it is likely FIXME:)
if (instance != null)
{
var type = new InstanceContext(instance).GetRawValue().GetType();
if (!type.GetTypeInfo().IsPublic)
{
throw new XamlObjectReaderException(String.Format("instance type '{0}' must be public and non-nested.", type));
}
var xt = SchemaContext.GetXamlType(type);
if (xt.ConstructionRequiresArguments && xt.GetConstructorArguments().Count == 0 && xt.TypeConverter == null)
{
throw new XamlObjectReaderException(String.Format("instance type '{0}' has no default constructor.", type));
}
}
value_serializer_context = new ValueSerializerContext(new PrefixLookup(sctx), sctx, null, null, null, null);
new XamlObjectNodeIterator(instance, sctx, value_serializer_context, this.settings).PrepareReading();
}
