/// <summary> Delete any entities that were removed from the collection</summary>
private void DeleteOrphans(string entityName, IPersistentCollection pc)
{
//TODO: suck this logic into the collection!
ICollection orphans;
if (pc.WasInitialized)
{
CollectionEntry ce = eventSource.PersistenceContext.GetCollectionEntry(pc);
orphans = ce == null ? CollectionHelper.EmptyCollection : ce.GetOrphans(entityName, pc);
}
else
{
orphans = pc.GetQueuedOrphans(entityName);
}
foreach (object orphan in orphans)
{
if (orphan != null)
{
log.Info("deleting orphaned entity instance: " + entityName);
eventSource.Delete(entityName, orphan, false, null);
}
}
}
public override void Cascade(IEventSource session, object child, string entityName, object anything, bool isCascadeDeleteEnabled)
{
if (log.IsDebugEnabled())
{
log.Debug("cascading to delete: {0}", entityName);
}
session.Delete(entityName, child, isCascadeDeleteEnabled, (ISet <object>)anything);
}
public override void Cascade(IEventSource session, object child, string entityName, object anything, bool isCascadeDeleteEnabled)
{
if (log.IsDebugEnabled)
{
log.Debug("cascading to delete: " + entityName);
}
session.Delete(entityName, child, isCascadeDeleteEnabled, (ISet)anything);
}
/// <summary> Cascade an action to the child or children</summary>
private void CascadeProperty(object parent, object child, IType type, CascadeStyle style, string propertyName, object anything, bool isCascadeDeleteEnabled)
{
if (child != null)
{
if (type.IsAssociationType)
{
IAssociationType associationType = (IAssociationType)type;
if (CascadeAssociationNow(associationType))
{
CascadeAssociation(parent, child, type, style, anything, isCascadeDeleteEnabled);
}
}
else if (type.IsComponentType)
{
CascadeComponent(parent, child, (IAbstractComponentType)type, propertyName, anything);
}
}
else
{
// potentially we need to handle orphan deletes for one-to-ones here...
if (type.IsEntityType && ((EntityType)type).IsLogicalOneToOne())
{
// We have a physical or logical one-to-one and from previous checks we know we
// have a null value. See if the attribute cascade settings and action-type require
// orphan checking
if (style.HasOrphanDelete && action.DeleteOrphans)
{
// value is orphaned if loaded state for this property shows not null
// because it is currently null.
EntityEntry entry = eventSource.PersistenceContext.GetEntry(parent);
if (entry != null && entry.Status != Status.Saving)
{
object loadedValue;
if (componentPathStack.Count == 0)
{
// association defined on entity
loadedValue = entry.GetLoadedValue(propertyName);
// Check this is not a null carrying proxy. The no-proxy load is currently handled by
// putting a proxy (!) flagged for unwrapping (even for non-constrained one-to-one,
// which association may be null) in the loadedState of the parent. The unwrap flag
// causes it to support having a null implementation, instead of throwing an entity
// not found error.
loadedValue = eventSource.PersistenceContext.UnproxyAndReassociate(loadedValue);
}
else
{
// association defined on component
// todo : this is currently unsupported because of the fact that
// we do not know the loaded state of this value properly
// and doing so would be very difficult given how components and
// entities are loaded (and how 'loaded state' is put into the
// EntityEntry). Solutions here are to either:
// 1) properly account for components as a 2-phase load construct
// 2) just assume the association was just now orphaned and
// issue the orphan delete. This would require a special
// set of SQL statements though since we do not know the
// orphaned value, something a delete with a subquery to
// match the owner.
loadedValue = null;
}
if (loadedValue != null)
{
eventSource.Delete(entry.Persister.EntityName, loadedValue, false, null);
}
}
}
}
}
}