<union-subclass entity-name="ModuleFolder" abstract="false" lazy="false" extends="LearningObject" table="`MODULEFOLDER`">
      <meta attribute="eclassName">ModuleFolder</meta>
      <meta attribute="epackage">lobj.ecore</meta>
      <many-to-one name="folderMeta" entity-name="FolderMeta" cascade="delete,merge,persist,save-update,lock,refresh" lazy="false" insert="true" update="true" not-null="false">
         <column not-null="false" unique="false" name="`FOLDERMETA_ID`"/>
      </many-to-one>
      <bag name="moduleFolder" lazy="true" cascade="delete,merge,persist,save-update,lock,refresh">
         <key update="true">
            <column name="`MODULEFOLDER_ID`" not-null="false" unique="false"/>
         </key>
         <one-to-many entity-name="ModuleFolder"/>
      </bag>
      <bag name="module" lazy="false" cascade="delete,merge,persist,save-update,lock,refresh">
         <key update="true">
            <column name="`MODULEFOLDER_ID`" not-null="false" unique="false"/>
         </key>
         <one-to-many entity-name="Module"/>
      </bag>
      <many-to-one name="accessControl" entity-name="AccessControl" cascade="delete,merge,persist,save-update,lock,refresh" lazy="false" insert="true" update="true" not-null="false">
         <column not-null="false" unique="false" name="`ACCESSCONTROL_ID`"/>
      </many-to-one>
   </union-subclass>

session = dataStore.getSessionFactory().openSession();
      Transaction tx = session.getTransaction();

                ResourceSet resourceSet = new ResourceSetImpl();
      // Register the appropriate resource factory to handle all file extentions.

      resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put
      ("lobj",
       new LobjResourceFactoryImpl());
      
      // Register the package to ensure it is available during loading.
      //
      resourceSet.getPackageRegistry().put
            (LobjPackage.eNS_URI,
             LobjPackage.eINSTANCE);
                //create resource
      Resource rs = resourceSet.createResource(URI.createFileURI("dummy.lobj"));
      
      // start transaction
      tx.begin();
      
      // query for object by ID
      Query qry = session.createQuery("from "+eclassname+" where id='"+id+"'");
      List list = qry.list();

for(Iterator iter = list.iterator(); iter.hasNext();){
         EObject element = (EObject) iter.next();
         rs.getContents().add(element);
         for (Iterator featureIterator =
              EcoreUtil.getAllContents(element, true);
            featureIterator.hasNext(); ) {
             EObject eObject = (EObject)featureIterator.next();
             rs.getContents().add(eObject);
         }
      }
//serialize resource
String myObject = resourceToString(rs, encoding);
tx.commit();
session.close();
return myObject;