Hibernate Community • View topic - Problem on hibernate extend class mapping

peterchoicm

Post subject: Problem on hibernate extend class mapping

Posted: Wed Mar 09, 2005 11:48 pm

Newbie

Joined: Wed Mar 09, 2005 11:39 pm
Posts: 1

Situation is:
I have downloaded an external lib with parent class X (eg. com.company.Sample), then I wrote a class Y (eg. my.classes.Sample) that extends class X and need to map it in hibernate.
Since the external lib fetches class X directly I must declare <class> tag in .hbm.xml file, so I declare class Y as <subclass> with class X declaration.

Problem is:
Since class X and class Y has the sample name "Sample", hibernate tends to consider that "duplicate" and throw "duplicate import" error.

How can I solve the above problem?

Hibernate version:
Hibernate 2
Mapping documents:

<hibernate-mapping>
<class
name="de.nava.informa.impl.hibernate.Channel"
table="CHANNELS"
dynamic-update="false"
dynamic-insert="false"
polymorphism="explicit"
>

<id
name="intId"
column="CHANNEL_ID"
type="integer"
unsaved-value="-1"
>
<generator class="native">
</generator>
</id>

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

<property
name="description"
type="java.lang.String"
update="true"
insert="true"
column="DESCRIPTION"
/>

<property
name="locationString"
type="string"
update="true"
insert="true"
column="LOCSTRING"
/>

<property
name="site"
type="java.net.URL"
update="true"
insert="true"
column="SITE"
/>

<property
name="creator"
type="java.lang.String"
update="true"
insert="true"
column="CREATOR"
/>

<property
name="publisher"
type="java.lang.String"
update="true"
insert="true"
column="PUBLISHER"
/>

<property
name="language"
type="java.lang.String"
update="true"
insert="true"
column="LANGUAGE"
/>

<property
name="formatString"
type="string"
update="true"
insert="true"
column="FORMAT"
/>

<set
name="groups"
table="CAT_GROUP_CHANNEL"
lazy="true"
inverse="true"
cascade="none"
sort="unsorted"
>

<key
column="CHANNEL_ID"
/>

<many-to-many
class="de.nava.informa.impl.hibernate.ChannelGroup"
column="GROUP_ID"
outer-join="auto"
/>

</set>

<bag
name="items"
table="ITEMS"
lazy="false"
inverse="true"
cascade="all"
>

<key
column="CHANNEL_ID"
/>

<one-to-many
class="de.nava.informa.impl.hibernate.Item"
/>
</bag>

<many-to-one
name="image"
class="de.nava.informa.impl.hibernate.Image"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="IMAGE_ID"
not-null="false"
/>

<many-to-one
name="textInput"
class="de.nava.informa.impl.hibernate.TextInput"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="TEXTINPUT_ID"
not-null="false"
/>

<property
name="copyright"
type="java.lang.String"
update="true"
insert="true"
column="COPYRIGHT"
/>

<property
name="rating"
type="java.lang.String"
update="true"
insert="true"
column="RATING"
/>

<many-to-one
name="cloud"
class="de.nava.informa.impl.hibernate.Cloud"
cascade="none"
outer-join="auto"
update="true"
insert="true"
column="CLOUD_ID"
not-null="false"
/>

<property
name="generator"
type="java.lang.String"
update="true"
insert="true"
column="GENERATOR"
/>

<property
name="docs"
type="java.lang.String"
update="true"
insert="true"
column="DOCS"
/>

<property
name="ttl"
type="int"
update="true"
insert="true"
column="TTL"
/>

<bag
name="categories"
table="CAT_CHANNEL_LINK"
lazy="true"
inverse="false"
cascade="none"
>

<key
column="CHANNEL_ID"
/>

<many-to-many
class="de.nava.informa.impl.hibernate.Category"
column="CATEGORY_ID"
outer-join="auto"
/>

</bag>

<property
name="lastUpdated"
type="java.util.Date"
update="true"
insert="true"
column="LAST_UPDATED"
/>

<property
name="lastBuildDate"
type="java.util.Date"
update="true"
insert="true"
column="LAST_BUILD_DATE"
/>

<property
name="pubDate"
type="java.util.Date"
update="true"
insert="true"
column="PUB_DATE"
/>

<property
name="updatePeriod"
type="java.lang.String"
update="true"
insert="true"
column="UPDATE_PERIOD"
/>

<property
name="updateFrequency"
type="int"
update="true"
insert="true"
column="UPDATE_FREQUENCY"
/>

<property
name="updateBase"
type="java.util.Date"
update="true"
insert="true"
column="UPDATE_BASE"
/>



<subclass name="com.newsy.channel.model.Channel" extends="de.nava.informa.impl.hibernate.Channel">
<property name="subscriptionNum" type="long"/>
</subclass>

</class>

</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

net.sf.hibernate.MappingException: duplicate import: Channel
at net.sf.hibernate.cfg.Mappings.addImport(Mappings.java:85)
at net.sf.hibernate.cfg.Binder.bindClass(Binder.java:127)
at net.sf.hibernate.cfg.Binder.bindSubclass(Binder.java:162)
at net.sf.hibernate.cfg.Binder.handleSubclass(Binder.java:1095)
at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:1056)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:363)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1257)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:252)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:
288)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.afterProper
tiesSet(LocalSessionFactoryBean.java:383)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:990)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.createBean(AbstractAutowireCapableBeanFactory.java:275)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.createBean(AbstractAutowireCapableBeanFactory.java:193)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:240)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:163)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.
preInstantiateSingletons(DefaultListableBeanFactory.java:230)
at org.springframework.context.support.AbstractApplicationContext.refres
h(AbstractApplicationContext.java:304)
at org.springframework.web.context.support.XmlWebApplicationContext.refr
esh(XmlWebApplicationContext.java:131)
at org.springframework.web.context.ContextLoader.createWebApplicationCon
text(ContextLoader.java:167)
at org.springframework.web.context.ContextLoader.initWebApplicationConte
xt(ContextLoader.java:101)
at org.springframework.web.context.ContextLoaderListener.contextInitiali
zed(ContextLoaderListener.java:48)
at com.newsy.common.webapp.listener.StartupListener.contextInitialized(S
tartupListener.java:38)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContex
t.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:80
7)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)

at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDe
ployer.java:903)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:494)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.jav
a:216)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester
.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source
)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(
Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContent
Dispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Un
known Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1567)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDep
loyer.java:488)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.j
ava:483)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427
)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:349)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478
)
at org.apache.catalina.core.StandardService.start(StandardService.java:4
80)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:231
3)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:494)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
11469 ERROR [main] context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean wit
h name 'sessionFactory' defined in ServletContext resource [/WEB-INF/conf/applic
ationContext-hibernate.xml]: Initialization of bean failed; nested exception is
net.sf.hibernate.MappingException: duplicate import: Channel
net.sf.hibernate.MappingException: duplicate import: Channel
at net.sf.hibernate.cfg.Mappings.addImport(Mappings.java:85)
at net.sf.hibernate.cfg.Binder.bindClass(Binder.java:127)
at net.sf.hibernate.cfg.Binder.bindSubclass(Binder.java:162)
at net.sf.hibernate.cfg.Binder.handleSubclass(Binder.java:1095)
at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:1056)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:363)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1257)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:252)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:
288)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.afterProper
tiesSet(LocalSessionFactoryBean.java:383)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:990)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.createBean(AbstractAutowireCapableBeanFactory.java:275)
at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.createBean(AbstractAutowireCapableBeanFactory.java:193)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:240)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:163)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.
preInstantiateSingletons(DefaultListableBeanFactory.java:230)
at org.springframework.context.support.AbstractApplicationContext.refres
h(AbstractApplicationContext.java:304)
at org.springframework.web.context.support.XmlWebApplicationContext.refr
esh(XmlWebApplicationContext.java:131)
at org.springframework.web.context.ContextLoader.createWebApplicationCon
text(ContextLoader.java:167)
at org.springframework.web.context.ContextLoader.initWebApplicationConte
xt(ContextLoader.java:101)
at org.springframework.web.context.ContextLoaderListener.contextInitiali
zed(ContextLoaderListener.java:48)
at com.newsy.common.webapp.listener.StartupListener.contextInitialized(S
tartupListener.java:38)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContex
t.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:80
7)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)

at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDe
ployer.java:903)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:494)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.jav
a:216)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester
.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source
)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(
Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContent
Dispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Un
known Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1567)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDep
loyer.java:488)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.j
ava:483)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427
)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:349)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478
)
at org.apache.catalina.core.StandardService.start(StandardService.java:4
80)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:231
3)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:494)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)

Name and version of the database you are using:
MySQL 3.23.54

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

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