public override IEnumerable <T> GetNestedLinkSource <T>(int iGlobalLink, int iLocalFactory, object instance)
{
IDeferredSourceFactory factory = (IDeferredSourceFactory)this.Locals[iLocalFactory];
if (factory == null)
{
MetaDataMember member = (MetaDataMember)this.Globals[iGlobalLink];
factory = this.services.GetDeferredSourceFactory(member);
this.Locals[iLocalFactory] = factory;
}
return((IEnumerable <T>)factory.CreateDeferredSource(instance));
}
private void InitializeDeferredLoader(MetaDataMember deferredMember)
{
MetaAccessor acc = deferredMember.StorageAccessor;
if (!acc.HasAssignedValue(this.current) && !acc.HasLoadedValue(this.current))
{
MetaAccessor dsacc = deferredMember.DeferredSourceAccessor;
IEnumerable loader = (IEnumerable)dsacc.GetBoxedValue(this.current);
// don't reset loader on any deferred member that already has one
if (loader == null)
{
IDeferredSourceFactory factory = this.tracker.services.GetDeferredSourceFactory(deferredMember);
loader = factory.CreateDeferredSource(this.current);
dsacc.SetBoxedValue(ref this.current, loader);
}
else if (loader != null && !haveInitializedDeferredLoaders)
{
// If loader is present but wasn't generated by us, then
// an attempt to Attach or Add an entity from another context
// has been made, which is not supported.
throw Error.CannotAttachAddNonNewEntities();
}
}
}