[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3232) Null Pointer Exception on Sort in a set

[FOIRET (JIRA)]

Null Pointer Exception on Sort in a set
---------------------------------------

                 Key: HHH-3232
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3232
             Project: Hibernate3
          Issue Type: Bug
    Affects Versions: 3.0 final
         Environment: Windows Apache mySQL Tomcat
            Reporter: FOIRET
            Priority: Critical


Hi,

Find below a null pointer exception error when i try to find the ElemactionDAO by his ID (vdo.epi.hibernate.ElemactionDAO.findById)
This error appears when i add a sort="natural" in the set of the entity (Action). An Action contains a set of Elemaction 
(Find after a part of the mapping file Action)

This parameter resolves my sort issue in the set but it creates this one ...

I use a TreeSet in the POJO Action for the Elemaction

Could you tell me what is the issue ?

java.lang.NullPointerException
	at java.lang.String.compareTo(Unknown Source)
	at vdo.epi.hibernate.Elemaction.compareTo(Elemaction.java:491)
	at java.util.TreeMap.compare(Unknown Source)
	at java.util.TreeMap.put(Unknown Source)
	at java.util.TreeSet.add(Unknown Source)
	at org.hibernate.collection.PersistentSet.initializeFromCache(PersistentSet.java:104)
	at org.hibernate.cache.entry.CollectionCacheEntry.assemble(CollectionCacheEntry.java:35)
	at org.hibernate.event.def.DefaultInitializeCollectionEventListener.initializeCollectionFromCache(DefaultInitializeCollectionEventListener.java:130)
	at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:48)
	at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)
	at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)
	at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:755)
	at org.hibernate.event.def.DefaultLoadEventListener.assembleCacheEntry(DefaultLoadEventListener.java:567)
	at org.hibernate.event.def.DefaultLoadEventListener.loadFromSecondLevelCache(DefaultLoadEventListener.java:494)
	at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:356)
	at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:137)
	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:193)
	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:101)
	at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
	at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:846)
	at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
	at org.hibernate.type.ManyToOneType.assemble(ManyToOneType.java:196)
	at org.hibernate.type.TypeFactory.assemble(TypeFactory.java:404)
	at org.hibernate.cache.entry.CacheEntry.assemble(CacheEntry.java:96)
	at org.hibernate.cache.entry.CacheEntry.assemble(CacheEntry.java:82)
	at org.hibernate.event.def.DefaultLoadEventListener.assembleCacheEntry(DefaultLoadEventListener.java:540)
	at org.hibernate.event.def.DefaultLoadEventListener.loadFromSecondLevelCache(DefaultLoadEventListener.java:494)
	at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:356)
	at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:137)
	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:193)
	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:101)
	at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:815)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
	at $Proxy3.get(Unknown Source)
	at vdo.epi.hibernate.ElemactionDAO.findById(ElemactionDAO.java:159)
	at vdo.epi.page.ActioncreaPage.onEditElem(ActioncreaPage.java:424)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.sf.click.util.ClickUtils.invokeListener(ClickUtils.java:1393)
	at net.sf.click.control.ActionLink.onProcess(ActionLink.java:498)
	at net.sf.click.ClickServlet.processPage(ClickServlet.java:555)
	at net.sf.click.ClickServlet.handleRequest(ClickServlet.java:356)
	at net.sf.click.ClickServlet.doGet(ClickServlet.java:284)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Unknown Source)

Lines in the Mapping file of Action which defines the set of Elemaction

		<set name="elemaction" inverse="true" cascade="all" lazy="false" sort="natural">
			<cache usage="read-write" />
			<key column="actionId" />
			<one-to-many class="Elemaction" />
		</set>


-- 
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