[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1217) Problems loading lists of scalar values via EntityMode.DOM4J

[Patrick C. (JIRA) <no...@at...>]

Problems loading lists of scalar values via EntityMode.DOM4J
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         Key: HHH-1217
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1217
     Project: Hibernate3
        Type: Bug
  Components: core  
    Versions: 3.0.5    
 Environment: HIbernate 3.0.5, MySql 4.10 (Innodb), Windows XP
 Reporter: Patrick Casey


Mappings which contain lists of scalar values (as opposed to lists of mapped objects) throw NPEs when you try to load them via a DOM4J session.

**The Mapping:

<class name="metadata.MetaFormDescriptor" table="metaform">
		<cache usage="read-write" />
		<id name="id" type="string" length="32">
			<column name="id" length="32" not-null="true"/>
			<generator class="uuid.hex"/>
		</id>
		<property name="objectClass" column="objectclass" type="string"/>
		<many-to-one name="user" class="core.User" embed-xml="false">
			<column name="user_id" length="32"></column>
		</many-to-one>
		<list name="listA" table="mfa" fetch="join" cascade="all-delete-orphan" embed-xml="false">
			<key column="form_id"  />
			<index column="sequence" />
			<element type="string" column="encoded"/>
		</list>
		<list name="listB" table="mfb" fetch="join" cascade="all-delete-orphan" embed-xml="false">
			<key column="form_id" />
			<index column="sequence" />
			<element type="string" column="encoded"/>
		</list>
		<list name="listC" table="mfc" fetch="join" cascade="all-delete-orphan" embed-xml="false">
			<key column="form_id" />
			<index column="sequence" />
			<element type="string" column="encoded"/>
		</list>
	</class>

**The Code that Loads it:

		Session sxml = snormal.getSession(EntityMode.DOM4J);
		sxml.setFlushMode(FlushMode.NEVER);
		List l = sxml.createQuery("from " + MetaFormDescriptor.class.getCanonicalName()).list();

** The Dump you get:

Exception in thread "main" java.lang.NullPointerException
	at org.dom4j.tree.AbstractElement.addElement(AbstractElement.java:1169)
	at org.hibernate.collection.PersistentIndexedElementHolder.readFrom(PersistentIndexedElementHolder.java:135)
	at org.hibernate.loader.Loader.readCollectionElement(Loader.java:674)
	at org.hibernate.loader.Loader.readCollectionElements(Loader.java:370)
	at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:314)
	at org.hibernate.loader.Loader.doQuery(Loader.java:412)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
	at org.hibernate.loader.Loader.loadCollection(Loader.java:1434)
	at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:99)
	at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:488)
	at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
	at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1430)
	at org.hibernate.type.CollectionType.getCollection(CollectionType.java:484)
	at org.hibernate.type.CollectionType.resolveKey(CollectionType.java:332)
	at org.hibernate.type.CollectionType.resolve(CollectionType.java:326)
	at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:105)
	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:530)
	at org.hibernate.loader.Loader.doQuery(Loader.java:436)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
	at org.hibernate.loader.Loader.doList(Loader.java:1593)
	at org.hibernate.loader.Loader.list(Loader.java:1577)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:395)
	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:271)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:844)
	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
	at bootstrap.PrimeMover.unLoadOneFile(PrimeMover.java:41)
	at bootstrap.PrimeMover.unLoadSeed(PrimeMover.java:59)
	at zzTest.Tester.main(Tester.java:736)

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