Exception in <set>’s <one-to-many> unidirectional mapping

Parent class mapping
====================
<id name="Id" column="ID"/>
<component name="childcomponent" >
<set name="value" lazy="false" cascade="save-update" >
<key column="parent_id" not-null="true" />
<one-to-many class="Child" not-found="ignore" entity-name="childentityname" />
</set>
</component>

...
</class>

Child class mapping
===================
<class name="Child" table="ChildTable" entity-name=" childentityname">

<composite-id name="childId" >
<key-property name="value" column=" childId" />
</composite-id>

<property name="parentid" column=" parentid" insert="false" update="false"/>

...
</class>

Parent table structure
======================
Id number (pk)
Parent_name varchar2(50);
Other cols….



Child table structure
=====================
Childid number (pk)
Parented number (fk to Parent table)
Other cols….

Database
========
DB2


Hibernate
=========
Version 3.0


When I tried to save the parent object(insert), Hibernate is trying to update the child table by preparing an Update statement. My requirement is to save all the Child objects present in set by preparing insert statements.

Can any body suggest me how to map the Child object correctly?

Throwing an exception by stack trace as follows.

org.springframework.dao.DataIntegrityViolationException: Hibernate operation: could not insert collection: [com.mci.etms.eb.dataobjects.EbTicket.com.mci.etms.eb.dataobjects.EbTicket.ALocationAccessHours.value#1997]; DB2 SQL error: SQLCODE: -803, SQLSTATE: 23505, SQLERRMC: XWEEKMK1;0000000201; nested exception is com.ibm.db2.jcc.c.SqlException: DB2 SQL error: SQLCODE: -803, SQLSTATE: 23505, SQLERRMC: XWEEKMK1;0000000201
com.ibm.db2.jcc.c.SqlException: DB2 SQL error: SQLCODE: -803, SQLSTATE: 23505, SQLERRMC: XWEEKMK1;0000000201

You should post the code you used to instanciante and save your objects.

Why do you use a composite-id for your Child.
<id name="value" column"xy" >
<generator="assigened"
...
should be fine.

I am not sure if the problem is coming from the composite-id. I have not tested so far how hibernate works with null values or "defined" valued in the composite-id.

Regards
Sebastian

I am using composite-id because the key field is in a component class.

the follwing code shows how the parent is created.
===============================

ClassPathXmlApplicationContext appContext = new ClassPathXmlApplicationContext(
new String[] { "applicationContext-eb.xml" });
sessionFactory = (SessionFactory)appContext.getBean("DB2SessionFactory");
ebDBLayer = (EbDBLayer)appContext.getBean("ebDBLayer");
transactionManager = (PlatformTransactionManager)appContext
.getBean("transactionManager");

Instantiating the parent and filling it with data.

ebDBLayer.insert(parent);