spring - Saving an object via getSessionFactory().getCurrentSession().save(item) -

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even if operation seems extremely used haven't found problem in code. in dao class have:

    public class itemdaoimpl extends hibernatedaosupport implements itemdao {     @transactional     public void additem(item item){         getsessionfactory().getcurrentsession().save(item);     }      @transactional(readonly = true)     public list<item> findallitem(){         return getsessionfactory().getcurrentsession().createquery("from item").list();     }}

findallitem() works well, whereas additem() doesn't. when click button invokes additem() following error thrown:

java.lang.classcastexception: com.z.item.model.item cannot cast java.util.map javax.faces.el.evaluationexception: java.lang.classcastexception: com.z.item.model.item cannot cast java.util.map @ javax.faces.component.methodbindingmethodexpressionadapter.invoke(methodbindingmethodexpressionadapter.java:98) @ com.sun.faces.application.actionlistenerimpl.processaction(actionlistenerimpl.java:98) @ javax.faces.component.uicommand.broadcast(uicommand.java:311) . . .

but haven't specified map use object "item" everywhere. item object passed additem() correct. why exception thrown?

here how configure it:

<hibernate-mapping>     <class entity-name="com.z.item.model.item"         table="item">          <id name="id" type="long">             <column name="id" />             <generator class="identity" />         </id>         <property name="name" type="string">             <column name="itemname" length="45" not-null="true" />         </property>         <property name="amount" type="int">             <column name="amount" not-null="true" />         </property>         <property name="price" type="java.math.bigdecimal">             <column name="price" length="10" not-null="true" />         </property>     </class> </hibernate-mapping>       <tx:annotation-driven  transaction-manager="transactionmanager"/>     <bean id="transactionmanager"       class="org.springframework.jdbc.datasource.datasourcetransactionmanager">     <property name="datasource" ref="datasource"></property>     </bean>     <bean id="itemdao"          class="com.z.item.dao.impl.itemdaoimpl" >         <property name="sessionfactory" ref="sessionfactory"></property>     </bean>       <bean id="sessionfactory"       class="org.springframework.orm.hibernate3.localsessionfactorybean">     <property name="datasource">       <ref bean="datasource"/>     </property>       <property name="hibernateproperties">        <props>          <prop key="hibernate.dialect">org.hibernate.dialect.hsqldialect</prop>          <prop key="hibernate.show_sql">true</prop>        </props>     </property>     <property name="mappingresources">     <list>           <value>com/z/item/hibernate/item.hbm.xml</value>     </list>     </property>    </bean>

i don't think issue caused hibernate. issue may have happened when click button , before reaching additem(). likely, data mapping issue(i assume map data item first when clicking button). try print out item before call additem(), should see above exception not calling additem().


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