Using hibernate 3.1rc2 and stored procedures I came across the following problem. I am attempting to load all the collections of a particular object via stored procedures. I have a DAO class that performs each stored procedure call one after the other. However, after I execute all of these stored procedures and then try and save the object that was loaded I get the following stack trace. Any suggestions?

java.lang.ClassCastException: java.util.ArrayList
at org.hibernate.type.SetType.wrap(SetType.java:39)
at org.hibernate.event.def.WrapVisitor.processArrayOrNewCollection(WrapVisitor.java:84)
at org.hibernate.event.def.WrapVisitor.processCollection(WrapVisitor.java:51)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:101)
at org.hibernate.event.def.WrapVisitor.processValue(WrapVisitor.java:98)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:55)
at org.hibernate.event.def.DefaultFlushEntityEventListener.wrapCollections(DefaultFlushEntityEventListener.java:168)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:102)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:195)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:905)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:345)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:490)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:495)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:468)
at org.springframework.transaction.interceptor.TransactionAspectSupport.doCommitTransactionAfterReturning(TransactionAspectSupport.java:258)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
at $Proxy1.save(Unknown Source)
at com.sterling.domain.CRUDSTest.testFindItems(CRUDSTest.java:82)
at org.apache.commons.jelly.tags.ant.AntTag.doTag(AntTag.java:195)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:247)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:186)
at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:42)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:247)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:78)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:109)
at org.apache.maven.werkz.Goal.fire(Goal.java:656)
at org.apache.maven.werkz.Goal.attain(Goal.java:592)
at org.apache.maven.werkz.Goal.attainPrecursors(Goal.java:505)
at org.apache.maven.werkz.Goal.attain(Goal.java:590)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:693)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:263)
at org.apache.maven.cli.App.doMain(App.java:511)
at org.apache.maven.cli.App.main(App.java:1258)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)