Hi,
I am just not able to understand the reason for getting following error while saving my java TreeMap using hibernate.
My hibernate mapping is

<map name="entries" table="bid_values" lazy="false" sort="natural">
<key column="ID" />
<index column="price"/>
<composite-element class="Entry">
<property name="type" column="type"/>
<property name="volume" column="volume"/>
</composite-element>
</map>


And error and exception is as follows:

16:05:23.552 [Thread-3] ERROR o.h.property.BasicPropertyAccessor expected type: java.util.TreeMap, actual value: org.hibernate.collection.PersistentSortedMap
org.springframework.orm.hibernate3.HibernateSystemException: IllegalArgumentException occurred while calling setter of entries; nested exception is org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of com.miriamlaurel.fi.protocol.model.Quote.bidEntries
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:661)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdate(HibernateTemplate.java:744)
at com.miriamlaurel.blackjack.server.services.DataManager.storeOrder(DataManager.java:101)
at com.miriamlaurel.fi.protocol.model.Market.onQuote(Market.java:170)
at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.miriamlaurel.pms.listeners.dispatch.DispatchListener.invoke(DispatchListener.java:171)
at com.miriamlaurel.pms.listeners.dispatch.DispatchListener.processMessage(DispatchListener.java:111)
at com.miriamlaurel.pms.listeners.MessageListenerDelegate.processMessage(MessageListenerDelegate.java:40)
at com.miriamlaurel.blackjack.maya.MockFeedEmitter.run(MockFeedEmitter.java:159)
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of com.miriamlaurel.fi.protocol.model.Quote.bidEntries
at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:128)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:360)
at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:221)
at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3594)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:300)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:144)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:117)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:534)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:526)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:522)
at org.springframework.orm.hibernate3.HibernateTemplate$16.doInHibernate(HibernateTemplate.java:747)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
... 11 more
Caused by: java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:66)
... 26 more

any help appreciated!

cheers!

just wanted to mention that same thing with java.util.Map works absolutely fine but it just dsnt work with TreeMap.

Kindly help!

hey i have got the answer to my problem..

providing comparable class for keys of treeMap is must! one should provide that in sorted="class name" attribute of map.
I knew it was required but i waited just as to check if my mapping in hibernate was correct. i shouldn't hv! ;)