public virtual void OnRefresh(RefreshEvent @event, IDictionary refreshedAlready)
{
IEventSource source = @event.Session;
bool isTransient = !source.Contains(@event.Entity);
if (source.PersistenceContext.ReassociateIfUninitializedProxy(@event.Entity))
{
if (isTransient)
{
source.SetReadOnly(@event.Entity, source.DefaultReadOnly);
}
return;
}
object obj = source.PersistenceContext.UnproxyAndReassociate(@event.Entity);
if (refreshedAlready.Contains(obj))
{
log.Debug("already refreshed");
return;
}
EntityEntry e = source.PersistenceContext.GetEntry(obj);
IEntityPersister persister;
object id;
if (e == null)
{
persister = source.GetEntityPersister(null, obj); //refresh() does not pass an entityName
id = persister.GetIdentifier(obj);
if (log.IsDebugEnabled())
{
log.Debug("refreshing transient {0}", MessageHelper.InfoString(persister, id, source.Factory));
}
EntityKey key = source.GenerateEntityKey(id, persister);
if (source.PersistenceContext.GetEntry(key) != null)
{
throw new PersistentObjectException("attempted to refresh transient instance when persistent instance was already associated with the Session: " +
MessageHelper.InfoString(persister, id, source.Factory));
}
}
else
{
if (log.IsDebugEnabled())
{
log.Debug("refreshing {0}", MessageHelper.InfoString(e.Persister, e.Id, source.Factory));
}
if (!e.ExistsInDatabase)
{
throw new HibernateException("this instance does not yet exist as a row in the database");
}
persister = e.Persister;
id = e.Id;
}
// cascade the refresh prior to refreshing this entity
refreshedAlready[obj] = obj;
new Cascade(CascadingAction.Refresh, CascadePoint.BeforeRefresh, source).CascadeOn(persister, obj, refreshedAlready);
if (e != null)
{
EntityKey key = source.GenerateEntityKey(id, persister);
source.PersistenceContext.RemoveEntity(key);
if (persister.HasCollections)
{
new EvictVisitor(source).Process(obj, persister);
}
}
if (persister.HasCache)
{
CacheKey ck = source.GenerateCacheKey(id, persister.IdentifierType, persister.RootEntityName);
persister.Cache.Remove(ck);
}
EvictCachedCollections(persister, id, source.Factory);
// NH Different behavior : NH-1601
// At this point the entity need the real refresh, all elementes of collections are Refreshed,
// the collection state was evicted, but the PersistentCollection (in the entity state)
// is associated with a possible previous session.
new WrapVisitor(source).Process(obj, persister);
string previousFetchProfile = source.FetchProfile;
source.FetchProfile = "refresh";
object result = persister.Load(id, obj, @event.LockMode, source);
if (result != null)
{
if (!persister.IsMutable)
{
source.SetReadOnly(result, true);
}
else
{
source.SetReadOnly(result, e == null ? source.DefaultReadOnly : !e.IsModifiableEntity());
}
}
source.FetchProfile = previousFetchProfile;
// NH Different behavior : we are ignoring transient entities without throw any kind of exception
// because a transient entity is "self refreshed"
if (!ForeignKeys.IsTransientFast(persister.EntityName, obj, @event.Session).GetValueOrDefault(result == null))
{
UnresolvableObjectException.ThrowIfNull(result, id, persister.EntityName);
}
}