I am having problems importing XML with one-to-many element. Could anyone help me????

Thanks in advance.

The code that raises the exception is:

...
session.beginTransaction();
Session xmlSession = session.getSession(EntityMode.DOM4J);
Object x = xmlSession.merge(mapping_class,doc4j.getRootElement());
xmlSession.saveOrUpdate(mapping_class,x);
....

It is raised in merge function call.

Here is the exception:

Exception in thread "main" java.lang.ClassCastException: org.dom4j.tree.DefaultElement cannot be cast to java.util.Collection
at org.hibernate.type.CollectionType.replaceElements(CollectionType.java:500)
at org.hibernate.type.CollectionType.replace(CollectionType.java:574)
at org.hibernate.type.TypeFactory.replace(TypeFactory.java:505)
at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:392)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:319)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:167)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:81)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:704)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:688)
at org.criptolab.filetransformercontext.command.HibernateExportCommand.execute(HibernateExportCommand.java:57)
at org.criptolab.filetransformercontext.command.HibernateExportCommand.execute(HibernateExportCommand.java:75)
at org.criptolab.filetransformercontext.FileTransformerContext.commandExecute(FileTransformerContext.java:147)
at org.criptolab.filetransformercontext.FileTransformerContext.resolve(FileTransformerContext.java:175)
at org.criptolab.filetransformercontext.dia.Make4Dia.resolve(Make4Dia.java:96)
at org.criptolab.filetransformercontext.dia.Make4Dia.main(Make4Dia.java:250)


The hbm files:
Proyecto.hbm
<hibernate-mapping package="o2008.eui.cargainformes" >
<class name="Proyecto" node="PROYECTO" table="proyectos">
<id column="id_proyecto" name="id_proyecto" node="@id_proyecto" type="int"/>


<property column="referencia" name="referencia" node="REFERENCIA" type="string" unique="true"/>
<set name="recursos" node="recursos" embed-xml="true" optimistic-lock="false" cascade="all-delete-orphan" inverse="true" lazy="false">
<key column="id_recurso"/>
<one-to-many class="Recurso" embed-xml="true" node="RECURSO"/>
</set>
</class>
</hibernate-mapping>

Recurso.hbm
<hibernate-mapping package="o2008.eui.cargainformes" >
<class name="Recurso" node="RECURSO" table="recproy>
<id column="id_recurso" name="id_recurso" node="@id_recurso" type="integer"><generator class="sequence"><param name="sequence">recproy_id_recurso_seq</param></generator></id>
<many-to-one name="proyecto" column="id_proyecto" class="Proyecto" not-null="true" embed-xml="false" node="@id_proyecto"/>
</class>
</hibernate-mapping>

replaceElements method in CollectionType.java source code does not support EntityMode.DOM4J. So I suposse this is because it fails:



I'll try to patch this code to enable it...