So I have a simple relationship between 2 objects. I cannot share the code directly as it proprietary in nature. I could try to reproduce a dummy test that has the same issue; however before I go through that effort I wanted to see if there was anyone that could offer an explanation or solution to my problem off the top of their head. I know that there are others that have encountered a similar issue; however they didn't present any real workable solutions (
http://forum.hibernate.org/viewtopic.ph ... 13c4cc7190). What Paulj describes is exactly the issue that I am facing. I have implemented a hashcode calculation that goes over a collection of objects. This collection of objects cannot be simply ignored for the purposes of the hashcode calculation as these relationships to various object defines the uniqueness for this type.
So how do I get to the exception state. Simple. The object with the collection gets added to a Set of such objects. As it is being added to a Set the hashcodes for all the objects within that set are calculated. When calculating the hashcode for these objects the collection is inspected. At this stage the collection is being initialized (as it is eagerly fetched). Because it is being initialized the famous LazyInitializationException is thrown!
Code:
Caused by: org.hibernate.LazyInitializationException: illegal access to loading collection
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:341)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
at org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:411)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:881)
at company.artemis.model.impl.ViewSubnetImpl.hashCode(ViewSubnetImpl.java:117)
at java.util.HashMap.put(HashMap.java:372)
at java.util.HashSet.add(HashSet.java:200)
at java.util.AbstractCollection.addAll(AbstractCollection.java:305)
at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:329)
at org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:240)
at org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:222)
at org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:195)
at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:877)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:865)
at org.hibernate.loader.Loader.doQuery(Loader.java:729)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1860)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3049)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:399)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:375)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:139)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:98)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:836)
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:66)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:150)
But this only happens when the collection is eagerly loaded! I have tried to initialize the collection first however that also results in an assertion error. Seems odd that there is no way to block the current thread until this collection is properly initialized. Any ideas out there?
Hibernate version: 3.2.6 Mapping documents: annotation based in proprietary codeCode between sessionFactory.openSession() and session.close(): proprietaryFull stack trace of any exception that occurs: see aboveName and version of the database you are using: Oracle 11gThe generated SQL (show_sql=true): proprietaryAgain sorry about the lack of code but if an example is truly required I could try to create one. Just wanted to see if anyone had any interest in helping me with this problem first.[/code]
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