With NHibernate, how can I create an INHibernateProxy?
- by Eric
After lots of reading about serialization, I've decided to try to create DTOs. After more reading, I decided to use AutoMapper.
What I would like to do is transform the parent (easy enough) and transform the entity properties if they've been initialized, which I've done with ValueResolvers like below (I may try to make it generic once I get it fully working). This part works.
public class OrderItemResolver : ValueResolver<Order, OrderItem>
{
protected override OrderItem ResolveCore(Order source)
{
// could also use NHibernateUtil.IsInitialized(source.OrderItem)
if (source.OrderItem is NHibernate.Proxy.INHibernateProxy)
return null;
else
return source.OrderItem;
}
}
}
When I transform the DTO back to an entity, for the entities that weren't initialized, I want to create a proxy so that if the entity wants to access it, it can. However, I can't figure out how to create a proxy. I'm using Castle if that's relevant.
I've tried a bunch of things with no luck. The below code is a mess, mainly because I've been trying things at random without knowing what I should be doing. Anybody have any suggestions?
public class OrderItemDTOResolver : ValueResolver<OrderDTO, OrderItem>
{
protected override OrderItem ResolveCore(OrderDTO source)
{
if (source.OrderItem == null)
{
//OrderItem OrderItem = new ProxyGenerator().CreateClassProxy<OrderItem>(); // Castle.Core.Interceptor.
//OrderItem OrderItem = new ProxyGenerator().CreateClassProxy<OrderItem>();
//OrderItem.Id = source.OrderItemId;
//OrderItem OrderItem = new OrderItem();
//var proxy = new OrderItem() as INHibernateProxy;
//var proxy = OrderItem as INHibernateProxy;
//return (OrderItem)proxy.HibernateLazyInitializer
//ILazyInitializer proxy = new LazyInitializer("OrderItem", OrderItem, source.OrderItemId, null, null, null, null);
//return (OrderItem)proxy;
//return (OrderItem)proxy.HibernateLazyInitializer.GetImplementation();
//return OrderItem;
IProxyTargetAccessor proxy = new Castle.Core.Interceptor.
var initializer = new LazyInitializer("OrderItem", typeof(OrderItem), source.OrderItemId, null, null, null, null);
//var proxyFactory = new SerializableProxyFactory{Interfaces = Interfaces, TargetSource = initializer, ProxyTargetType = IsClassProxy};
//proxyFactory.AddAdvice(initializer);
//object proxyInstance = proxyFactory.GetProxy();
//return (INHibernateProxy) proxyInstance;
return null;
//OrderItem.Id = source.OrderItemId;
//return OrderItem;
}
else
return OrderItemDTO.Unmap(source.OrderItem);
}
}
Thanks,
Eric
