[Hibernate-issues] [Hibernate-JIRA] Closed: (HB-167) Cannot Handle Circular Subclass Reference

[<leg...@at...>]

Message:

   The following issue has been closed.

   Resolver: Gavin King
       Date: Wed, 9 Jul 2003 6:14 PM

That should be <many-to-one>, not <property>
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-167


Here is an overview of the issue:
---------------------------------------------------------------------
        Key: HB-167
    Summary: Cannot Handle Circular Subclass Reference
       Type: Bug

     Status: Closed
   Priority: Major
 Resolution: REJECTED

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.0.1

   Assignee: 
   Reporter: Hao Chen

    Created: Wed, 9 Jul 2003 10:06 AM
    Updated: Wed, 9 Jul 2003 6:14 PM

Description:
A super class has a field whose type is a subclass. Looks like Hibernate failed to load the subclass because the super class has not been initialized. 

Can we have a better algorithm to deal with this situation? 

==============================================================
My configurations:

<hibernate-mapping>
    <class
        name="BaseEntity"
        dynamic-update="false"
        dynamic-insert="false"
    >
        <id name="id" column="id" type="java.lang.Long">
            <generator class="native">
            </generator>
        </id>

        <property
            name="name"
            type="java.lang.String"
            update="true"
            insert="true"
            column="name"
            length="100"
            not-null="true"
        />

        <subclass
            name="resource.BaseResource"
            dynamic-update="false"
            dynamic-insert="false"
        >
        <property
            name="description"
            type="java.lang.String"
            update="true"
            insert="true"
            column="description"
            length="300"
            not-null="true"
        />

        <property
            name="status"
            type="classification.Status"
            update="true"
            insert="true"
            column="status"
            not-null="true"
        />

        ...

        <subclass
            name="classification.Status"
            dynamic-update="false"
            dynamic-insert="false"
        >
        <property
            name="description"
            type="java.lang.String"
            update="true"
            insert="true"
            column="description"
            length="100"
            not-null="true"
        />

        </subclass>

        </subclass>

    </class>

</hibernate-mapping>

================================================================================

INFO - Mapping subclass: resource.BaseResource -> BaseEntity
DEBUG - Mapped property: description -> description, type: string
ERROR - Could not compile the mapping document
net.sf.hibernate.MappingException: Could not interpret type: classification.Status
        at net.sf.hibernate.cfg.Binder.getTypeFromXML(Binder.java:769)
        at net.sf.hibernate.cfg.Binder.bindValue(Binder.java:348)
        at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:872)
        at net.sf.hibernate.cfg.Binder.bindSubclass(Binder.java:123)
        at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:882)
        at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:288)
        at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1076)
        at net.sf.hibernate.cfg.Configuration.add(Configuration.java:230)
        at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:252)
        at net.sf.hibernate.cfg.Configuration.addClass(Configuration.java:286)
        at util.HibernateUtil.getSessionFactory(HibernateUtil.java:29)
        at util.HibernateUtil.main(HibernateUtil.java:53)
Exception in thread "main" exception.SystemException: net.sf.hibernate.MappingException: Could not int
erpret type: classification.Status
        at util.HibernateUtil.getSessionFactory(HibernateUtil.java:43)
        at util.HibernateUtil.main(HibernateUtil.java:53)
Caused by: net.sf.hibernate.MappingException: Could not interpret type: classification.Status
        at net.sf.hibernate.cfg.Binder.getTypeFromXML(Binder.java:769)
        at net.sf.hibernate.cfg.Binder.bindValue(Binder.java:348)
        at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:872)
        at net.sf.hibernate.cfg.Binder.bindSubclass(Binder.java:123)
        at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:882)
        at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:288)
        at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1076)
        at net.sf.hibernate.cfg.Configuration.add(Configuration.java:230)
        at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:252)
        at net.sf.hibernate.cfg.Configuration.addClass(Configuration.java:286)
        at util.HibernateUtil.getSessionFactory(HibernateUtil.java:29)
        ... 1 more



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