private static ITypeReference CreateConnectionTypeRef(
IDescriptorContext context,
MemberInfo?resolverMember,
Type?type,
PagingOptions options)
{
// first we will try and infer the schema type from the collection.
IExtendedType schemaType = PagingHelper.GetSchemaType(
context.TypeInspector,
resolverMember,
type);
// we need to ensure that the schema type is a valid output type. For this we create a
// type info which decomposes the type into its logical type components and is able
// to check if the named type component is really an output type.
if (!context.TypeInspector.TryCreateTypeInfo(schemaType, out ITypeInfo? typeInfo) ||
!typeInfo.IsOutputType())
{
throw PagingObjectFieldDescriptorExtensions_InvalidType();
}
options = context.GetSettings(options);
// once we have identified the correct type we will create the
// paging result type from it.
IExtendedType connectionType = context.TypeInspector.GetType(
options.IncludeTotalCount ?? false
? typeof(ConnectionCountType <>).MakeGenericType(schemaType.Source)
: typeof(ConnectionType <>).MakeGenericType(schemaType.Source));
// last but not leas we create a type reference that can be put on the field definition
// to tell the type discovery that this field needs this result type.
return(TypeReference.Create(connectionType, TypeContext.Output));
}
