I have a property mapped like this:
<map name="ChildCodes" table="APMDATA.CODE_DESC" sort="natural" lazy="true" cascade="none">
<jcs-cache usage="read-write" />
<key column="CODE_TYPE_ID" />
<index column="ID" type="Int32" />
<one-to-many class="BMO.BookCredit.APMSCode.AbstractAPMSCode, TestNHibernate" />
</map>
As using <Map>, the property will get set a NHibernate.Collection.SortedMap instance.

When I do Save2UpdateCopy(), I trace into PersistentCollectionType.Copy(), cause SortedMapType & MapType don't have overrided Copy() method. In this method, there are one line:
IList originalCopy = new ArrayList( (IList) original );
but the orignal object type NHibernate.Collection.SortedMap is not IList. It cause Cast error.

Is this a problem or I didn't use it right?

In Hibernate, the java.util.Collection is used in PersistentCollectionType.copy(). And java.util.Collection has the method add().

On .Net side, ICollection doesn't have Add(), I think that's why it got changed to IList.

But IList is not the common base interface.

I made a dirty modification like this, the other way is override this Copy() method in NHibernate.Type.MapType:
public override object Copy( object original, object target, ISessionImplementor session, object owner, IDictionary copiedAlready )
{
object retResult = null;
if ( original == null )
{
return null;
}
if ( !NHibernateUtil.IsInitialized( original ) )
{
return target;
}

IType elemType = GetElementType( session.Factory );
if ( original is IList )
{
IList originalCopy = new ArrayList( (IList) original );
IList result = target == null ? (IList) Instantiate( session, session.Factory.GetCollectionPersister( role ) ) : (IList) target;
result.Clear();
foreach ( object obj in originalCopy )
{
result.Add( elemType.Copy( obj, null, session, owner, copiedAlready ) );
}
retResult = result;
}
else if (original is IDictionary)
{
IDictionary originalCopy = new Hashtable((IDictionary) original);
IDictionary result = target == null ? (IDictionary) Instantiate( session, session.Factory.GetCollectionPersister( role ) ) : (IDictionary) target;
result.Clear();
foreach ( object key in originalCopy.Keys )
{
object newObj = elemType.Copy(originalCopy[key], null, session, owner, copiedAlready );
result[key] = newObj;
}
retResult = result;

}
return retResult;
}
=========================
Hibernate 3 has depricate SaveOrUpdateCopy(), use Merg() instead. Is there any enhancement for Hibernate3 in changing this? I havn't got time to investigate yet. Anyone know about it already?

What is the plan for NHibernate to keep up to Hibernate 3.x?

It looks like a bug, please create a JIRA issue

I hope it can be resolved before release 1. Thx

http://jira.nhibernate.org/browse/NH-293