[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2052) org.hibernate.pretty.MessageHelper.collectionInfoString tries to cast wrong object to String, causes ClassCastException

[Peter Wyngaard (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_27928 ] 

Peter Wyngaard commented on HHH-2052:
-------------------------------------

Me too, I've run into this bug.  In my case, it's trying to create the DEBUG message:

DEBUG org.hibernate.engine.CollectionLoadContext  - creating collection wrapper:[my.class.name#myId]

The collection it is trying to wrap is a ManyToMany association.  Here is the annotation on the getter:

	@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY)
	@JoinTable(
			name="STUDY_PARAMETER_ASSIGN",
			joinColumns={@JoinColumn(name="STUDY_ID",referencedColumnName="STUDY_ID")},
			inverseJoinColumns={@JoinColumn(name="PARAMETER_VALUE_ID")}
	)

Note the "referencedColumnName" in the JoinColumns.  I have to include this because the referenced column is not the primary key in the referenced table (due to circumstances beyond our control...)

There is another class in the application that also has a ManyToMany association, but it works just fine.  Here is the annotation in that class:

	@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY)
	@JoinTable(
			name="SAMPLE_PARAMETER_ASSIGN",
			joinColumns={@JoinColumn(name="SAMPLE_ID")},
			inverseJoinColumns={@JoinColumn(name="PARAMETER_VALUE_ID")}
	)

Note that this class does not have the "referencedColumnName" annotation.

I'm employing the same workaround.  I have put the following in my log4j.properties:

log4j.logger.org.hibernate.engine.CollectionLoadContext=INFO


> org.hibernate.pretty.MessageHelper.collectionInfoString tries to cast wrong object to String, causes ClassCastException
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HHH-2052
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2052
>             Project: Hibernate3
>          Issue Type: Bug
>            Reporter: Tree 'Huggy Bear' Hugger
>         Attachments: bugtest.zip
>
>
> Debug level logging attempted by MessageHelper falls over when constructing a loggable string for a mapped collection on the main entity.
> Following the code in the stacktrace, I can see that MessageHelper expects the parent key for the collection relationship to be the primary key, but it is mapped to another field of a different type via a property-ref. Hence the ClassCastException below.
> The work around is to set logging to INFO or higher.
> I have also attached a pared-down zip with the maven 2 project containing the mappings and the unit test which fails.
> The following JIRA issue may be the same thing:
> http://opensource.atlassian.com/projects/hibernate/browse/ANN-298
> The following messages on the Hib forum demonstrate other interest in this issue:
> http://forum.hibernate.org/viewtopic.php?t=949913
> http://forum.hibernate.org/viewtopic.php?t=956778
> http://forum.hibernate.org/viewtopic.php?t=962471
> java.lang.ClassCastException: com.nomadsoft.cortex.domain.country.basic.BasicCountry
> 	at org.hibernate.type.StringType.toString(StringType.java:44)
> 	at org.hibernate.type.NullableType.toLoggableString(NullableType.java:168)
> 	at org.hibernate.pretty.MessageHelper.collectionInfoString(MessageHelper.java:284)
> 	at org.hibernate.loader.Loader.readCollectionElement(Loader.java:972)
> 	at org.hibernate.loader.Loader.readCollectionElements(Loader.java:635)
> 	at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)
> 	at org.hibernate.loader.Loader.doQuery(Loader.java:689)
> 	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
> 	at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
> 	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
> 	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
> 	at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
> 	at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
> 	at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
> 	at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
> 	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:177)
> 	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
> 	at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
> 	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:799)
> 	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:792)
> 	at org.springframework.orm.hibernate3.HibernateTemplate$1.doInHibernate(HibernateTemplate.java:452)
> 	at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)
> 	at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:446)
> 	at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:440)
> 	at com.nomadsoft.cortex.infrastructure.hibernate.HibernateCountryRepository.getById(HibernateCountryRepository.java:26)
> 	at com.nomadsoft.cortex.domain.country.basic.BasicCountryService.getCountry(BasicCountryService.java:34)
>         etc etc

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira