The way is not IUserCollectionType but ICollectionTypeFactory
2009/10/22 Matt Mangold <[email protected]>
>
> My domain objects support custom fields that are stored in such a way
> that requires metadata and logic to be applied before their values can
> be stored and retrieved.
>
> I already have a Custom Field Repository that handles the persistence
> of custom fields, and I don't want to try to recreate that logic in
> NHibernate mappings.
>
> I would however like to support lazy loading of my custom fields. It
> would be nice if I could somehow trick the proxy into calling my
> dedicated repository for loading and saving rather than going through
> the NHibernate engine.
>
> One way I solved this problem was to implement an interceptor which
> worked, but I took a performance hit when loading large amounts of
> data, because the dedicated repository was called each time an entity
> was loaded. It would be nice instead, if those calls to load custom
> fields were done lazily! From what I understand lazy loading cannot be
> done in an interceptor.
>
> I have looked into implementing a custom user type (IUserType and
> IUserCollectionType), but the documentation is very limited, and I
> want to learn if it is even possible to do what I want before I go
> down the path of trying.
>
> Here is an example of one of my domain objects:
>
> public class ContactEntity : ICustomFieldContainer
> {
> public long ContactId { get; set; }
> public String FirstName { get; set; }
> public String LastName { get; set; }
>
> #region ICustomFieldContainer Members
> public List<CustomFieldEntity> CustomFields { get; set; }
> #endregion
> }
>
> >
>
--
Fabio Maulo
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