take a look at <many-to-any>
On Wed, Dec 17, 2008 at 6:13 AM, Germán Schuager <[email protected]>wrote:
> Hi,
> I have a base class with an abstract component represented by an interface:
>
> public abstract class BaseClass
> {
> public abstract ICustomComponent CustomComponent { get; }
> }
>
>
> Then, I have several subclasses that provide their specific concrete
> intances (to achieve diferent behaviors) using this abstract property; note
> that it could be null:
>
> public class FirstClass
> {
> public override ICustomComponent CustomComponent {
> get {
> if (customComponent == null) customComponent = new
> FirstConcreteCustomComponent();
> return customComponent;
> }
> }
> }
>
> public class SecondClass
> {
> public override ICustomComponent CustomComponent {
> get {
> if (customComponent == null) customComponent = new
> SecondConcreteCustomComponent();
> return customComponent;
> }
> }
> }
>
> public class ThirdClass
> {
> public override ICustomComponent CustomComponent {
> get { return null; }
> }
> }
>
>
> I would like to map this set of classes using table-per-subclass
> inheritance mapping.
> Is it possible? How can I do it?
>
> I have wrote some mappings that let me persist a FirstClass entity, but
> when I try to get it from the DB it yells:
> "Cannot instantiate abstract class or interface: ICustomComponent"
>
> Regards,
>
>
> Germán Schuager
> blog.schuager.com
>
>
>
> >
>
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