Hey Hibernators!

I'm a new guy trying to get into hibernate with spring, and I need a little help with my one to many relationship.

A Project has Many Project Logs.. But as you'll see below, the collection is giving me problems.

:Project.hbm.xml contains:
<set name="projectLogs" inverse="true">
<key column="project_id"/>
<one-to-many class="org.appfuse.model.ProjectLog"/>
</set>

:ProjectLog.hbm.xml contains:
<many-to-one name="project" column="project_id" class="org.appfuse.model.Project"/>


:Project.java contains:

private Set projectLogs = new HashSet();
public Set getProjectLogs() {
return projectLogs;
}

public void addProjectLogs(ProjectLog projectLog) {
getProjectLogs().add(projectLog);
}

public void setProjectLogs(Set projectLogs) {
this.projectLogs = projectLogs;
}

:ProjectDAO.java contains:

public List getProjects() {
return getHibernateTemplate().find("from Project");
}

Full stack trace of any exception that occurs:

[junit] Testcase: testGetProjects(org.appfuse.dao.ProjectDAOTest): Caused an ERROR
[junit] cannot access loading collection
[junit] net.sf.hibernate.LazyInitializationException: cannot access loading collection
[junit] at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:191)
[junit] at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
[junit] at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:392)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionAppend(HashCodeBuilder.java:353)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:327)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:194)
[junit] at org.appfuse.model.BaseObject.hashCode(BaseObject.java:28)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:392)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionAppend(HashCodeBuilder.java:353)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:327)
[junit] at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:194)
[junit] at org.appfuse.model.BaseObject.hashCode(BaseObject.java:28)
[junit] at java.util.HashMap.hash(HashMap.java:261)
[junit] at java.util.HashMap.put(HashMap.java:379)
[junit] at java.util.HashSet.add(HashSet.java:192)
[junit] at java.util.AbstractCollection.addAll(AbstractCollection.java:319)
[junit] at net.sf.hibernate.collection.Set.endRead(Set.java:244)
[junit] at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
[junit] at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
[junit] at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
[junit] at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
[junit] at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
[junit] at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
[junit] at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
[junit] at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:93)
[junit] at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
[junit] at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
[junit] at net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:336)
[junit] at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3123)
[junit] at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
[junit] at net.sf.hibernate.loader.Loader.doList(Loader.java:1033)
[junit] at net.sf.hibernate.loader.Loader.list(Loader.java:1024)
[junit] at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
[junit] at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1544)
[junit] at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
[junit] at org.springframework.orm.hibernate.HibernateTemplate$23.doInHibernate(HibernateTemplate.java:501)
[junit] at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:243)
[junit] at org.springframework.orm.hibernate.HibernateTemplate.executeFind(HibernateTemplate.java:263)
[junit] at org.springframework.orm.hibernate.HibernateTemplate.find(HibernateTemplate.java:498)
[junit] at org.appfuse.dao.hibernate.ProjectDAOHibernate.getProjects(ProjectDAOHibernate.java:20)
[junit] at org.appfuse.dao.ProjectDAOTest.testGetProjects(ProjectDAOTest.java:66)
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

:Conclusions:

As you can see, the problem starts when the test trys to call ProjectDAOHibernate.getProjects(), of which I included above. Really nothing to it.

The interesting thing is, I can call getProjects just fine up until the point that I add a single ProjectLog. As soon as I add a project log (which works), calling getProjects then yields this error.

Please Help!! Thanks!

-Gregg