Hi,

I have a class that contains another class

public class VehicleOperation implements Serializable
{
protected ProfileContainer profileContainer = new ProfileContainer();

void setProfileContainer(ProfileContainer profileContainer)
{
this.profileContainer = profileContainer;
}
public ProfileContainer getProfileContainer()
{
return profileContainer;
}
}

The inner class has a linked list of objects ..

public class ProfileContainer implements Serializable {

LinkedList<Profile> completedProfiles = new LinkedList<Profile>();

public Collection<Profile> getCompletedProfiles()
{
return completedProfiles;
}
public void setCompletedProfiles(LinkedList<Profile> completedProfiles)
{
this.completedProfiles = completedProfiles;
}
}

my mapping files look like this:

<class name="VehicleOperation" table="ve_op" optimistic- lock="none">
<id name="voId" type="integer" unsaved-value="null" column="vo_id">
<generator class="native"/>
</id>
<one-to-one name="profileContainer" cascade="save-update"
fetch="join" lazy="false" entity
name="ProfileContainer"/>
</class>

<class name="ProfileContainer" table="profile_container" optimistic-
lock="none">
<id name="id" type="integer" unsaved-value="null" column="id">
<generator class="native"/>
</id>
<list name="completedProfiles" cascade="all">
<key column="profileId"/>
<list-index>
<column name="profileIndex" not-null="true"/>
</list-index>
<one-to-many entity-name="Profile"/>
</list>
</class>
</hibernate-mapping>

When I try to save the VehicleOperation object vOP
session.save(vOp);
I want the profileContainer with the profiles to be saved also.
It gives me an exception

- IllegalArgumentException in class: setter method of property: completedProfiles
16500 [AWT-EventQueue-0] ERROR org.hibernate.property.BasicPropertyAccessor - expected type: java.util.LinkedList, actual value: org.hibernate.collection.PersistentList

org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of ProfileContainer.completedProfiles


Is there a problem with my mapping or with the way im saving it. How shud I do it.????

Thanks in advance

My first thought, given your java code, is that you shouldn't be using an explicit LinkedList. This is probably the problem, but even if it isn't, it's just a bad design. Use a List instead. The only place LinkedList should be used is with the new operator.

Presumably hibernate's PersistentList implements List but doesn't extend LinkedList.