Hi,

I have two classes: BomData and BomElementData

BomData contains:

int bomId,
int qty,
Set bomelements

BomElementData contains:

int bomElementId,
int scarpFact,
Bom Bom

Mappings are as follows:

<class name="com.saltare.server.dao.BomData" table="T_BOM" >
<id name="bomId" type="integer" column="BOM_ID">
<generator class="sequence">
<param name="sequence">T_BOM_SEQ</param>
</generator>
</id>
<property name="qty" column="QTY"/>

<set name="bomElements" table="T_BOM_ELEMENT" cascade="none">
<key column="BOM_ID"/>
<one-to-many class="com.saltare.server.dao.BomElementData"/>
</set>

<set name="roles" table="T_ROLE_BOM" lazy="true" inverse="true" >
<key column="BOM_ID"/>
<many-to-many column="ROLE_ID" class="com.saltare.server.dao.RoleData"/>
</set>
</class>


<class name="com.saltare.server.dao.BomElementData" table="T_BOM_ELEMENT" >
<id name="bomElementId" type="integer" column="BOM_ELEMENT_ID">
<generator class="sequence">
<param name="sequence">T_BOM_ELEMENT_SEQ</param>
</generator>
</id>

<property name="qty" column="QTY"/>
<property name="scrapFactor" column="SCRAP_FACTOR"/>

<many-to-one
name="item"
column="ITEM_ID"
class="com.saltare.server.dao.ItemData"
/>
<many-to-one
name="bom"
column="BOM_ID"
class="com.saltare.server.dao.BomData"
/>
</class>


I am getting ClassCastException when i try to create/edit BomData object.
While editing BomData, existing BomElements are deleted using session.remove() and it 's throwing exception at that point. Here is the code that throws exception within editBom() method.

for (Iterator elemIt = bomDAO.getBomElements().iterator(); elemIt.hasNext();) {
BomElementDAO bedao = (BomElementDAOelemIt.next );
getDAOFactory().removeDAO(bedao);
}


Here is the exception stacktrace:


Caused by: java.lang.ClassCastException
at net.sf.hibernate.type.SetType.wrap(SetType.java:27)
at net.sf.hibernate.impl.SessionImpl.wrap(SessionImpl.java:2496)
at net.sf.hibernate.impl.SessionImpl.wrap(SessionImpl.java:2436)
at net.sf.hibernate.impl.SessionImpl.flushEntities(SessionImpl.java:2162)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2020)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2007)
at com.saltare.server.db.hibernate.HibernateDBAccess.closeSession(HibernateDBAccess.java:134)
at com.saltare.ejb.drp.ModelBean.editBom(ModelBean.java:602)

I got struck with this exception since a week, please anyone let me know the solution for this exception.

Thanks in Advance
sanv

This problem happens when you have some other collection but Set in your associations.

Check if your association is holding a Set or subclass of it.

I hope it helps.

Thanks for your reponse.

I have two collections associated with this class. I have declares them as

Set bomElements;
Collection roles;

I mapped both of them as Set in mapping file.

Do i need to declare roles as Set instead of Collection in class ??

Please let me know.

Thanks