// $Id: DefaultPersistEventListener.java 9673 2006-03-22 14:57:59Z steve.ebersole@jboss.com $
package org.hibernate.event.def;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.HibernateException;
import org.hibernate.ObjectDeletedException;
import org.hibernate.PersistentObjectException;
import org.hibernate.engine.CascadingAction;
import org.hibernate.event.EventSource;
import org.hibernate.event.PersistEvent;
import org.hibernate.event.PersistEventListener;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.LazyInitializer;
import org.hibernate.util.IdentityMap;
/**
* Defines the default create event listener used by hibernate for creating
* transient entities in response to generated create events.
*
* @author Gavin King
*/
public class DefaultPersistEventListener extends AbstractSaveEventListener implements PersistEventListener {
private static final Logger log = LoggerFactory.getLogger(DefaultPersistEventListener.class);
/**
* Handle the given create event.
*
* @param event The create event to be handled.
* @throws HibernateException
*/
public void onPersist(PersistEvent event) throws HibernateException {
onPersist( event, IdentityMap.instantiate(10) );
}
/**
* Handle the given create event.
*
* @param event The create event to be handled.
* @throws HibernateException
*/
public void onPersist(PersistEvent event, Map createCache) throws HibernateException {
final SessionImplementor source = event.getSession();
final Object object = event.getObject();
final Object entity;
if (object instanceof HibernateProxy) {
LazyInitializer li = ( (HibernateProxy) object ).getHibernateLazyInitializer();
if ( li.isUninitialized() ) {
if ( li.getSession()==source ) {
return; //NOTE EARLY EXIT!
}
else {
throw new PersistentObjectException("uninitialized proxy passed to persist()");
}
}
entity = li.getImplementation();
}
else {
entity = object;
}
int entityState = getEntityState(
entity,
event.getEntityName(),
source.getPersistenceContext().getEntry(entity),
source
);
switch (entityState) {
case DETACHED:
throw new PersistentObjectException(
"detached entity passed to persist: " +
getLoggableName( event.getEntityName(), entity )
);
case PERSISTENT:
entityIsPersistent(event, createCache);
break;
case TRANSIENT:
entityIsTransient(event, createCache);
break;
default:
throw new ObjectDeletedException(
"deleted entity passed to persist",
null,
getLoggableName( event.getEntityName(), entity )
);
}
}
protected void entityIsPersistent(PersistEvent event, Map createCache) {
log.trace("ignoring persistent instance");
final EventSource source = event.getSession();
//TODO: check that entry.getIdentifier().equals(requestedId)
final Object entity = source.getPersistenceContext().unproxy( event.getObject() );
final EntityPersister persister = source.getEntityPersister( event.getEntityName(), entity );
if ( createCache.put(entity, entity)==null ) {
//TODO: merge into one method!
cascadeBeforeSave(source, persister, entity, createCache);
cascadeAfterSave(source, persister, entity, createCache);
}
}
/**
* Handle the given create event.
*
* @param event The save event to be handled.
* @throws HibernateException
*/
protected void entityIsTransient(PersistEvent event, Map createCache) throws HibernateException {
log.trace("saving transient instance");
final EventSource source = event.getSession();
final Object entity = source.getPersistenceContext().unproxy( event.getObject() );
if ( createCache.put(entity, entity)==null ) {
saveWithGeneratedId( entity, event.getEntityName(), createCache, source, false );
}
}
protected CascadingAction getCascadeAction() {
return CascadingAction.PERSIST;
}
protected Boolean getAssumedUnsaved() {
return Boolean.TRUE;
}
}