/**
* Based on configured options, will either return a pre-existing proxy, generate a new proxy, or
* perform an actual load.
*
* @return The result of the proxy/load operation.
* @throws HibernateException
*/
protected Object proxyOrLoad(
final LoadEvent event,
final EntityPersister persister,
final EntityKey keyToLoad,
final LoadEventListener.LoadType options)
throws HibernateException {
if (log.isTraceEnabled()) {
log.trace(
"loading entity: "
+ MessageHelper.infoString(
persister, event.getEntityId(), event.getSession().getFactory()));
}
if (!persister.hasProxy()) {
// this class has no proxies (so do a shortcut)
return load(event, persister, keyToLoad, options);
} else {
final PersistenceContext persistenceContext = event.getSession().getPersistenceContext();
// look for a proxy
Object proxy = persistenceContext.getProxy(keyToLoad);
if (proxy != null) {
return returnNarrowedProxy(event, persister, keyToLoad, options, persistenceContext, proxy);
} else {
if (options.isAllowProxyCreation()) {
return createProxyIfNecessary(event, persister, keyToLoad, options, persistenceContext);
} else {
// return a newly loaded object
return load(event, persister, keyToLoad, options);
}
}
}
}
/**
* Return the existing proxy associated with the given <tt>EntityKey</tt>, or the third argument
* (the entity associated with the key) if no proxy exists. Init the proxy to the target
* implementation, if necessary.
*/
public Object proxyFor(EntityPersister persister, EntityKey key, Object impl)
throws HibernateException {
if (!persister.hasProxy()) return impl;
Object proxy = proxiesByKey.get(key);
if (proxy != null) {
return narrowProxy(proxy, persister, key, impl);
} else {
return impl;
}
}
/**
* Does the mapping, and Hibernate default semantics, specify that this association should be
* fetched by outer joining
*/
protected boolean isJoinedFetchEnabledInMapping(FetchMode config, AssociationType type)
throws MappingException {
if (!type.isEntityType() && !type.isCollectionType()) {
return false;
} else {
if (config == FetchMode.JOIN) return true;
if (config == FetchMode.SELECT) return false;
if (type.isEntityType()) {
// TODO: look at the owning property and check that it
// isn't lazy (by instrumentation)
EntityType entityType = (EntityType) type;
EntityPersister persister =
getFactory().getEntityPersister(entityType.getAssociatedEntityName());
return !persister.hasProxy();
} else {
return false;
}
}
}
