Hello:
I'm using hibernate in my application, and when i tried to load a object i have this exception:
Caused by: org.hibernate.TypeMismatchException: Provided id of the wrong type: Expected: class es.impl.Tabla2Id, got class es.impl.Tabla1Id
I'm so confuse, because I save with the same application the object i want to load, and everything was ok, so ¿why the id was right when i saved, but it's a wrong type when i load?

The hbm files are:

Tabla1.hbm.xml:

Tabla2.hbm.xml

Tabla3.hbm.xml


In the hava code, i search wih the Tabla3 class, and when i do:
Iterator<Tabla1> it = tabla3.getTabla1().iterator();
i got the exception... Really, i don't understand why, if i do a get of Tabla1, the hibernate exception expect a Tabla2Id.... Someone can help me, please?

I change the mapped file Tabla1.hbm.xml, deleting the one-to-one relation and put a Set with a one-to-many relation and everything works, so if someone ave the same problem here is a solution... But if someone know why happen that, please explain it, because the relation is one-to-one... u don't understand why hibernate force me to put a one-to-many.

<class name="es.impl.Tabla1" table="Tabla1" schema="dbo" catalog="Catalog">
<composite-id name="id" class="es.impl.Tabla1Id">
<key-many-to-one name="tabla3" class="es.impl.Tabla3">
<column name="idTabla3" />
</key-many-to-one>
<key-property name="nif" type="java.lang.String">
<column name="NIF" length="9" />
</key-property>
</composite-id>
<set name="tabla2s" inverse="true">
<key>
<column name="idTabla3" not-null="true" />
<column name="NIF" not-null="true" />
</key>
<one-to-many class="es.impl.Tabla2" />
</set>
<property name="hombres" type="java.lang.String">
<column name="Hombres" not-null="true" />
</property>
...
</class>

You should check the file mapping and the JavaBean, there may be some property that you are not specifying the object (JavaBean), and the mapping file are taking another property type (wrong)
*Spanish:
Tu debes revisar el archivo de mapeo y el JavaBean, puede haber alguna propiedad que no le estes especificando en el objeto(JavaBean), y el archivo de mapeo este tomando el tipo de otra propiedad(erroneo).

The problem seems to be in the composite id class name.

In a one-to-one relation, hibernate wants that the composite-id classes are exactly the same in both related objects.

I had the same error in a similar case:



and changing org.test.Object2Id class with org.test.Object1Id one, the problem seems to be solved.