@SuppressWarnings("unchecked")
@Override
/**
* Handle the given delete event. This is the cascaded form.
*
* @param event The delete event.
* @param transientEntities The cache of entities already deleted
* @throws HibernateException
*/
public void onDelete(DeleteEvent event, Set transientEntities) throws HibernateException {
final EventSource source = event.getSession();
final PersistenceContext persistenceContext = source.getPersistenceContext();
Object entity = persistenceContext.unproxyAndReassociate(event.getObject());
EntityEntry entityEntry = persistenceContext.getEntry(entity);
final EntityPersister persister = source.getEntityPersister(event.getEntityName(), entity);
final Object version;
if (persister.isVersioned()) {
version = persister.getVersion(entity, source.getEntityMode());
// Make sure version has not changed on deleted entities
if ((entity instanceof TimelineEntity) && !((TimelineEntity) entity).isNew()) {
if (!persister.getVersionType().isEqual(version, entityEntry.getVersion())) {
throw new StaleObjectStateException(persister.getEntityName(), entityEntry.getId());
}
}
}
super.onDelete(event, transientEntities);
}
/**
* Given that there is no pre-existing proxy. Check if the entity is already loaded. If it is,
* return the entity, otherwise create and return a proxy.
*/
private Object createProxyIfNecessary(
final LoadEvent event,
final EntityPersister persister,
final EntityKey keyToLoad,
final LoadEventListener.LoadType options,
final PersistenceContext persistenceContext) {
Object existing = persistenceContext.getEntity(keyToLoad);
if (existing != null) {
// return existing object or initialized proxy (unless deleted)
log.trace("entity found in session cache");
if (options.isCheckDeleted()) {
EntityEntry entry = persistenceContext.getEntry(existing);
throwObjectDeletedIfNecessary(event, entry);
}
return existing;
} else {
log.trace("creating new proxy for entity");
// return new uninitialized proxy
Object proxy = persister.createProxy(event.getEntityId(), event.getSession());
persistenceContext.getBatchFetchQueue().addBatchLoadableEntityKey(keyToLoad);
persistenceContext.addProxy(keyToLoad, proxy);
return proxy;
}
}