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NHibernate + Custom List: Unable to cast...

Hi,

I'm using NHibernate 1.2 (CR1), and I'm using a custom list (inherited from
BindingList(Of T) ) for all my lists.

The NHibernate documentation told me that I had to implement
IUserCollection Type to my custom list, which I did. But I still get an error
when trying to read the object: "
{"Unable to cast object of type
'NHibernate.Col lection.Generic .PersistentGene ricBag`1[Ghost.clsPerson ne]' to
type 'BaseFramework. BaseList`1[Ghost.clsPerson ne]'."}"

I looked at the sample here
(http://analog-man.blogspot.com/2007/...ibernate.html),
but it didn't help a lot...

Does anybody knows what I'm doing wrong?

Thanks a lot in advance,

Pieter


This is my Custom List:
-----------------------

Public Class BaseList(Of T As BaseClass)
Inherits BindingList(Of T)
Implements IComponent, IUserCollection Type

...

#Region "IUserCollectio nType Implementation"

Public Function ReplaceElements (ByVal original As Object, ByVal target
As Object, ByVal persister As ICollectionPers ister, ByVal owner As Object,
ByVal copyCache As System.Collecti ons.IDictionary , ByVal session As
ISessionImpleme ntor) As Object Implements
IUserCollection Type.ReplaceEle ments
Dim Result As BaseList(Of T) = CType(target, BaseList(Of T))
Result.Clear()
For Each item As Object In CType(original, IEnumerable)
Result.Add(CTyp e(item, T))
Next
Return Result
End Function

Public Overloads Function IndexOf(ByVal collection As Object, ByVal
entity As Object) As Object Implements IUserCollection Type.IndexOf
Return CType(collectio n, BaseList(Of T)).IndexOf(CTy pe(entity, T))
End Function

Public Function Instantiate() As Object Implements
IUserCollection Type.Instantiat e
Return New BaseList(Of T)()
End Function

Public Function Instantiate(ByV al session As ISessionImpleme ntor, ByVal
persister As ICollectionPers ister) As IPersistentColl ection Implements
IUserCollection Type.Instantiat e
Return New PersistentIdent ifierBag(Of T)(session)
End Function

Public Function Wrap(ByVal session As ISessionImpleme ntor, ByVal
collection As Object) As IPersistentColl ection Implements
IUserCollection Type.Wrap
Return New PersistentIdent ifierBag(Of T)(session, CType(collectio n,
BaseList(Of T)))
End Function

Public Overloads Function Contains(ByVal collection As Object, ByVal
entity As Object) As Boolean Implements IUserCollection Type.Contains
Return CType(collectio n, BaseList(Of T)).Contains(CT ype(entity, T))
End Function

Public Function GetElements(ByV al collection As Object) As IEnumerable
Implements IUserCollection Type.GetElement s
Return CType(collectio n, IEnumerable)
End Function

#End Region

End Class

These are my mapping files:
----------------------------
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhib ernate-mapping-2.2">
<class name="Ghost.cls Entreprise, Ghost" table="tblEntre prises"
dynamic-update="true" lazy="false">
<id name="Entrepris eID" column="Entrepr iseID" type="Int32">
<generator class="identity " />
</id>
<property name="Nom" column="Nom" type="String" length="50" />
<bag name="Personnes " cascade="save-update" lazy="false">
<key column="Entrepr iseID"/>
<one-to-many class="Ghost.cl sPersonne, Ghost"/>
</bag>
</class>
</hibernate-mapping>

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhib ernate-mapping-2.2">
<class name="Ghost.cls Personne, Ghost" table="tblPerso nnes"
dynamic-update="true" lazy="false">
<id name="PersonneI D" column="Personn eID" type="Int32" unsaved-value="0">
<generator class="identity " />
</id>
<property name="Entrepris eID" column="Entrepr iseID" type="Int32"
length="4" />
<property name="Nom" column="Nom" type="String" length="50" />
<property name="Prenom" column="Prenom" type="String" length="50" />
<many-to-one name="Adresse" class="Ghost.cl sAdresse, Ghost"
column="Adresse ID" cascade="save-update" lazy="false"/>
</class>
</hibernate-mapping>
Mar 30 '07 #1
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