[jboss-jira] [JBoss JIRA] (HIBERNATE-138) [HHH-7629] Initialize PersistentCollection with fetchType LAZY returns NPE
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https://issues.jboss.org/browse/HIBERNATE-138?page=com.atlassian.jira.plu...
]
Brett Meyer commented on HIBERNATE-138:
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[~rimolive], I'm a little confused by the code example. Is 'entity' the
collection, or aProperty's parent entity?
Normally, I'd expect something like this:
Foo entity = session.get(Foo.class, id);
Hibernate.initialize(entity.getAProperty());
or
((PersistentCollection) entity.getAProperty()).forceInitialization();
Can the customer give any more code examples? A full test-case would be really helpful.
Thanks!
[HHH-7629] Initialize PersistentCollection with fetchType LAZY
returns NPE
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Key: HIBERNATE-138
URL: https://issues.jboss.org/browse/HIBERNATE-138
Project: Hibernate Integration
Issue Type: Bug
Reporter: Ricardo Martinelli Oliveira
Assignee: Brett Meyer
@JoinTable(name = "JOIN_TABLE", joinColumns = { @JoinColumn(name =
"JOIN_TABLE_ID", referencedColumnName = "ID") }, inverseJoinColumns =
{ @JoinColumn(name = "ENTITY_ID", referencedColumnName = "ID") })
@ManyToMany(fetch = FetchType.LAZY)
private Set<JoinTable> aProperty;
When fetching this entity, and after initialize, I get all the valid attribute values but
the aProperty is defined as PersistenceCollection.
This collection is not intialized yet. When I initialize this collection as follow:
(PersistentCollection) entity).forceInitialization();
Or
Hibernate.initialize(entity);
I got NullPointerException:
Caused by: java.lang.NullPointerException
at
org.hibernate.engine.internal.StatefulPersistenceContext.getLoadedCollectionOwnerOrNull(StatefulPersistenceContext.java:790)
at
org.hibernate.event.spi.AbstractCollectionEvent.getLoadedOwnerOrNull(AbstractCollectionEvent.java:75)
at
org.hibernate.event.spi.InitializeCollectionEvent.<init>(InitializeCollectionEvent.java:36)
at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1803)
at
org.hibernate.collection.internal.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:489)
at org.hibernate.Hibernate.initialize(Hibernate.java:77)
When I check source code of class
org.hibernate.engine.internal.StatefulPersistenceContext.getLoadedCollectionOwnerOrNull(StatefulPersistenceContext.java:790)
CollectionEntry ce = getCollectionEntry( collection );
790 if ( ce.getLoadedPersister() == null ) { 791 return null; // early exit... 792 }
Looks like the CollectionEntry ce is null. This collection entry is fetched from
collectionEntries.get(coll);
// Identity map of CollectionEntry instances, by the collection wrapper
121 private IdentityMap<PersistentCollection, CollectionEntry> collectionEntries;
I checked Jboss docs, it mentioned the way to initilialize the collection is as I have
done above.
http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/performance.htm...
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