Hi;

I have a single hibernate.cfg.xml that has a single mapping:
<mapping resource="net/windward/store/demo/DemoRequest.hbm.xml"/>

This mapping has two classes. I have Person and DemoRequest and the DemoRequest class extends the Person class.

If I do not put the following in the <class name="DemoRequest ...> node:
<joined-subclass name="net.windward.store.util.Person" table="Person">
<key column="personId"/>
</joined-subclass>

Then I can run and access both the Person and DemoRequest objects. But if I have the joined-subclass in, then I get the exception.

stack trace:
INFO (HbmBinder.java:260) - "Mapping class: net.windward.store.util.Person -> Person"
INFO (HbmBinder.java:260) - "Mapping class: net.windward.store.demo.DemoRequest -> DemoRequest"
ERROR (Configuration.java:365) - "Could not compile the mapping document"
org.hibernate.MappingException: duplicate import: net.windward.store.util.Person
at org.hibernate.cfg.Mappings.addImport(Mappings.java:105)
at org.hibernate.cfg.HbmBinder.bindPersistentClassCommonValues(HbmBinder.java:541)
at org.hibernate.cfg.HbmBinder.bindClass(HbmBinder.java:488)
at org.hibernate.cfg.HbmBinder.bindJoinedSubclass(HbmBinder.java:759)
at org.hibernate.cfg.HbmBinder.handleJoinedSubclass(HbmBinder.java:1879)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:1802)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:1728)
at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:318)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:236)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:152)
at org.hibernate.cfg.Configuration.add(Configuration.java:362)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:400)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:449)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1263)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1235)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1217)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1184)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
at net.windward.store.demo.test.TestAll.main(TestAll.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)

complete DemoRequest.hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping auto-import="false">

<class name="net.windward.store.util.Person">
<id name="personId" type="int">
<!-- <generator class="native"/> -->
</id>

<property name="name" type="string"/>
<property name="title" type="string"/>
<property name="company" type="string"/>
<property name="address1" type="string"/>
<property name="address2" type="string"/>
<property name="city" type="string"/>
<property name="state" type="string"/>
<property name="postalCode" type="string"/>
<property name="country" type="string"/>
<property name="phone" type="string"/>
<property name="email" type="string"/>
</class>

<class name="net.windward.store.demo.DemoRequest">
<id name="demoRequestId" type="int">
<generator class="native"/>
</id>

<!-- bugbug - make type -->
<property name="whereHeard" type="string"/>
<property name="createDate" type="date"/>
<property name="ipAddress" type="string"/>
<property name="trackingUniqueId" type="string"/>
<property name="trackingSource" type="string"/>
<property name="trackingId" type="string"/>
<property name="trackingReferrer" type="string"/>
<!-- end type -->

<property name="mailPing" type="short"/>
<property name="sendInfo" type="boolean"/>
<property name="ignore" type="boolean"/>
<property name="freebie" type="boolean"/>

<joined-subclass name="net.windward.store.util.Person" table="Person">
<key column="personId"/>
</joined-subclass>
</class>

</hibernate-mapping>

??? - thanks - dave

Look at the examples again in the refernce document.
You do not need a <class> and a <joined-subclass> mapping for DemoRequest. Just the <joined-subclass> definition.

Thank you - I didn't realize it was there only.

I'm having a similar problem; what am I doing wrong here? I'm getting an a duplicate import error on the Program.hbm.xml file shown below.

You're defining two objects with the name "Program" One for table PROGRAM and one, the joined-subclass, for table PROGRAM_REF. Each class, joined-subclass, etc... must have a unique name.

Actually, each entity must have a unique entity-name, which by default is the same as the class name. It is possible to map a class twice, you just have to explicitly specify the entity-name.