Hi,
I am using the Hibernate Session load() method to load an object. However, if the primary key is a String I get an exception.

Syntax of load method used:-
public Object load(Class theClass,Serializable id) throws HibernateException


The code is as follows:-

public void load(CommandInExecution cmdExec,BusinessEntity entity, Object primaryKey)
throws PersistenceException
{
Class classObj = entity.getEntityDefinition().getModelImplClass();
HibernateExecutionContext ctx = (HibernateExecutionContext) cmdExec;

Session sessionObj = ctx.getHibernateSession();

try
{
Object model = sessionObj.load(classObj,(Serializable)primaryKey);
entity.setState(model);
entity.setPrimaryKey(primaryKey);
}
catch (Exception ex)
{
ex.printStackTrace();
throw new PersistenceException(
this.toString(),
"load()",
"Unable to load the object of class:"
+ classObj
+ " from the database.",
ex);
}
}

I get the following exception on the line using the load function:-java.lang.ClassCastException: java.lang.String
at net.sf.hibernate.type.IntegerType.set(IntegerType.java:31)
at net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:48)
at net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:35)
at net.sf.hibernate.loader.Loader.bindPositionalParameters(Loader.java:674)
at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:713)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:185)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:831)
at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:851)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:57)
at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:49)
at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:419)
at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:2081)
at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1955)
at net.sf.hibernate.impl.SessionImpl.load(SessionImpl.java:1884)
at dolphin.framework.persistenceimpl.HibernateDBPersistenceManager.load(HibernateDBPersistenceManager.java:861)
at dolphin.framework.persistenceimpl.HibernateDBPersistenceManager.load(HibernateDBPersistenceManager.java:831)

Please let me know the reason.

Well I suspect you have not mapped your primary key as a String, as Hibernate tries to use IntegerType ...

Hi,

I forgot to add the concerned part of the hbm file in my post. Here it is:-


<id
name="location_type_cd"
type="java.lang.String"
column="location_type_cd"
>
<generator class="assigned" />
</id>

This shows it is a String.
I face this problem only for this table.

My problem is solved. Thanks and sorry.

Well would be great to post how you solved it.

Nothing, passing the wrong type of serializable object to the load method.
I suppose a ClassCastException thrown would make it easier to catch the problem faster...?