I am using version 2.0.3.

I have a one-to-many association between a Vehicle and its Timetables using the following mapping

<class name="org.fsl.lmis.licensing.businessobjects.Vehicle"
table="VEHICLE"
schema="LICENSING">
<id name="vehicleNo" column="VEHICLE_NO" type="integer">
<generator class="assigned"/>
</id>

<set name="timetables"
table="TIME_TABLE_HDR"
schema="LICENSING"
lazy="false"
inverse="true">
<key column="VEHICLE_NO"/>
<one-to-many class="org.fsl.lmis.licensing.businessobjects.Timetable" />
</set>


<many-to-one name="lastLicenceApplication"
column="LAST_APPL_NO" class="org.fsl.lmis.licensing.businessobjects.LicenceApplication"/>


</class>


<class name="org.fsl.lmis.licensing.businessobjects.Timetable"
schema ="LICENSING"
table="TIME_TABLE_HDR">

<id name="id" column="TIME_TABLE_ID" type="long">
<generator class="sequence">
<param name="sequence">LICENSING.seq_time_table</param>
</generator>
</id>

<set name="timetablePoints"
schema="LICENSING"
lazy="false"
cascade="all"
inverse="true">

<key column="TIME_TABLE_ID"/>
<one-to-many class="org.fsl.lmis.licensing.businessobjects.TimetablePoint" />
</set>

<many-to-one name="vehicle" column="VEHICLE_NO" class="org.fsl.lmis.licensing.businessobjects.Vehicle"/>
<many-to-one name="application" column="APPL_NO" class="org.fsl.lmis.licensing.businessobjects.LicenceApplication" cascade="all"/>
</class>

As the mapping shows this relationship is non-lazy. The Vehicle class is itself mapped ad part of a set on a LicenceApplication

<set
name="vehicles"
inverse="true"
lazy="false"
cascade="all">

<key column="LAST_APPL_NO"/>
<one-to-many class="org.fsl.lmis.licensing.businessobjects.Vehicle" />
</set>


When the following query is issued



the code works as long as a Timetable is present. Where there is no timetable in the database I am getting a NullPointerException in Hibernate code

//----------------------------------------------------------------------------
R java.lang.NullPointerException
net.sf.hibernate.impl.SessionImpl.getLoadingCollection(SessionImpl.java:2759)
net.sf.hibernate.type.PersistentCollectionType.getCollection(PersistentCollectionType.java:58)
at net.sf.hibernate.type.PersistentCollectionType.resolveIdentifier(PersistentCollectionType.java:170)
net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:1971)
at net.sf.hibernate.loader.Loader.doFind(Loader.java:196)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:588)
at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:102)
at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:2844)
at net.sf.hibernate.collection.PersistentCollection.getInitialValue(PersistentCollection.java:128)
at net.sf.hibernate.type.PersistentCollectionType.getCollection(PersistentCollectionType.java:70)
at net.sf.hibernate.type.PersistentCollectionType.resolveIdentifier(PersistentCollectionType.java:170)
at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:1971)
at net.sf.hibernate.loader.Loader.doFind(Loader.java:196)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:588)
at net.sf.hibernate.loader.OneToManyLoader.initialize(OneToManyLoader.java:102)
at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:2844)
at net.sf.hibernate.collection.PersistentCollection.getInitialValue(PersistentCollection.java:128)

Would you try this code against latest Hibernate 2.1, please?

We are using 2.0.3 as it is the recommended release, and 2.1 is still in 'beta'. Nevertheless I will try it with the 2.1.

I reviewed the code and the getters and setters for the timetables was marked private NOT pubic. Because of this the reflection optimizer was disabled at startup for this property. The retrieval of the collection failed when the query was issued under certain circumstances. This happened under the 2.0.3 version.

I am currently porting to the 2.1b4 version to test. Currently I am getting an AbstractMethodError which I am trying to fix.

This is in the FAQ. Recompile Hibernate on your JDK.

I was using the version recompiled for my JVM. Right now I am checking to see if somehow, something else went wrong on my part.