<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
   "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" >
<hibernate-mapping package="org.hibernate.test" default-access="field">
   <class entity-name="TestWorkflowItem" name="WorkflowItem" table="test_workflowitem">
      <id name="id" type="long">
         <generator class="native"/>
      </id>      
      <property name="name" column="name" not-null="true" type="string"/>
      <many-to-one cascade="all" entity-name="TestWorkflowItem" class="WorkflowItem" column="next_id" name="next" unique="true" foreign-key="fk_testworkflowitem_workflowitem"/>
   </class>
</hibernate-mapping>

package org.hibernate.test;

public final class WorkflowItem {
    private static final long serialVersionUID = 1L;
    private Long id;
    private String name;
    private WorkflowItem next;
    public WorkflowItem() {
    }
    boolean hasNext() {
        return next != null;
    }
    public void setNext(WorkflowItem newNext) {
        next = newNext;
    }
    public WorkflowItem getNext() {
        return next;
    }
    public String getName() {
        return name;
    }
    public void setName(String newName) {
        name = newName;
    }
}

Caused by: org.hibernate.MappingException: An association from the table test_workflowitem refers to an unmapped class: org.hibernate.test.WorkflowItem
   at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.secondPassCompileForeignKeys(InFlightMetadataCollectorImpl.java:1803)
   at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.secondPassCompileForeignKeys(InFlightMetadataCollectorImpl.java:1774)
   at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1593)
   at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:278)
   at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
   at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418)
   ...

public class ORMUnitTestCase extends BaseCoreFunctionalTestCase {

   // Add your entities here.
   @Override
   protected Class[] getAnnotatedClasses() {
      return new Class[] {
//            Foo.class,
//            Bar.class
      };
   }

   // If you use *.hbm.xml mappings, instead of annotations, add the mappings here.
   @Override
   protected String[] getMappings() {
      return new String[] {
                "TestWorkflowItem.hbm.xml"
      };
   }
   // If those mappings reside somewhere other than resources/org/hibernate/test, change this.
   @Override
   protected String getBaseForMappings() {
      return "org/hibernate/test/";
   }

   // Add in any settings that are specific to your test.  See resources/hibernate.properties for the defaults.
   @Override
   protected void configure(Configuration configuration) {
      super.configure( configuration );

      configuration.setProperty( AvailableSettings.SHOW_SQL, Boolean.TRUE.toString() );
      configuration.setProperty( AvailableSettings.FORMAT_SQL, Boolean.TRUE.toString() );
      //configuration.setProperty( AvailableSettings.GENERATE_STATISTICS, "true" );
   }

   // Add your tests, using standard JUnit.
   @Test
   public void hhh123Test() throws Exception {
      // BaseCoreFunctionalTestCase automatically creates the SessionFactory and provides the Session.
      Session s = openSession();
      Transaction tx = s.beginTransaction();
      // Do stuff...
        WorkflowItem first = new WorkflowItem();
        first.setName("First");
        WorkflowItem second = new WorkflowItem();
        second.setName("Second");
        first.setNext(second);
        s.save("TestWorkflowItem", first);

        List list = s.createQuery("from TestWorkflowItem where name = 'First'").list();
        assertEquals(1, list.size());
        WorkflowItem loaded = (WorkflowItem) list.get(0);
        assertNotNull(loaded.getNext());
        assertEquals("Second", loaded.getNext().getName());

        System.out.println("DONE");
      tx.commit();
      s.close();
   }
}

      this.referencedTypeName = manyToOneElement.getClazz() != null
            ? mappingDocument.qualifyClassName( manyToOneElement.getClazz() )
            : manyToOneElement.getEntityName();