since we've declared subclass-mapping in it's own file, our selects over those objects failed.

mapping of subclass:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<subclass name="dbfps.partner.po.FPSGeschaeftspartnerPO"
extends="com.carano.cbf.partner.po.GeschaeftspartnerPO" table="AV_G_PARTNER">
<key column="G_PARTNER_ID"/>
<property name="bahnstelle" column="BAHNSTELLE"/>
<property name="kostenstelle" column="KOSTENSTELLE"/>
<!-- Log timestamps/ ids -->
<property name="IDMitarbeiterInsert" column="MITARB_ID_INS" not-null="false"
unique="false" />
<property name="IDMitarbeiterUpdate" column="MITARB_ID_UPD" not-null="false"
unique="false" />
<property name="TSInsert" column="TS_INSERT" not-null="false" unique="false"
/>
<property name="TSUpdate" column="TS_UPDATE" not-null="false" unique="false"
/>
</subclass>
</hibernate-mapping>


there is no exception but following warning in log-file:

WARN[net.sf.hibernate.hql.QueryTranslator] no persistent classes found for query class: SELECT DISTINCT FPSGeschaeftspartnerPO
FROM
dbfps.partner.po.FPSGeschaeftspartnerPO AS FPSGeschaeftspartnerPO
WHERE
( (FPSGeschaeftspartnerPO.bahnstelle IS NULL ) OR
( FPSGeschaeftspartnerPO.bahnstelle LIKE '%') )

same query works, if subclass-mapping was declared in mapping of base class.

Subclass was added to Configuration, but it's later not listed in persistentClasses-Map of SessionFactoryImpl

what is wrong?

kersten

Are you using a recent Hibernate version?

we're using hibernate2

Well, which version? extends is only possible since 2.1 beta 2

version 2.0.1 17 June 2003

ok seems to be the wrong version

so, downloaded new hibernate jar, version is now version 2.1.2, 4 February 2003,
but the problem still exists

my fault i had a bad classpath, were old hbernate.jar was still included, now something changed and i got this following exception



net.sf.hibernate.MappingException: Error reading resource: dbfps/partner/po/FPSGeschaeftspartnerPO.hbm.xml
at net.sf.hibernate.cfg.Configuration.addClass(Configuration.java:336)
at fleet.persistence.HibernateMappingInitializer.initialize(HibernateMappingInitializer.java:70)
at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.media_saturn.framework.abo.persistence.hibernate.HibernatePersistencehandler.getInitializedConfiguration(HibernatePersistencehandler.java:617)
at com.media_saturn.framework.abo.persistence.hibernate.HibernatePersistencehandler.createSessionFactory(HibernatePersistencehandler.java:661)
at com.media_saturn.framework.abo.persistence.hibernate.HibernatePersistencehandler.doInitialize(HibernatePersistencehandler.java:509)
at com.media_saturn.framework.abo.persistence.AbstractPersistencehandler.initialize(AbstractPersistencehandler.java:70)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.media_saturn.framework.util.pooling.Pool$ElementProxy.invoke(Pool.java:304)
at com.media_saturn.framework.abo.persistence.PersistenceManager$PersistencehandlerProxy.invoke(PersistenceManager.java:378)
at $Proxy0.initialize(Unknown Source)
at com.media_saturn.framework.abo.persistence.PersistenceManager$PersistencehandlerInitializer.initialize(PersistenceManager.java:444)
at com.media_saturn.framework.util.pooling.Pool.get(Pool.java:472)
at com.media_saturn.framework.abo.persistence.PersistenceManager.getPersistencehandler(PersistenceManager.java:460)
at com.media_saturn.framework.abo.persistence.PersistenceManager.getPersistencehandlerFor(PersistenceManager.java:475)
at com.media_saturn.framework.abo.persistence.PersistenceManager.initializePersistencehandlerFor(PersistenceManager.java:99)
at fleet.client.gui.Main.initializeMappingLocal(Main.java:218)
at fleet.client.gui.Main.<init>(Main.java:76)
at fleet.client.gui.Main.main(Main.java:234)
Caused by: net.sf.hibernate.MappingException: invalid mapping
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:284)
at net.sf.hibernate.cfg.Configuration.addClass(Configuration.java:333)
... 22 more
Caused by: org.xml.sax.SAXParseException: Attribute "table" must be declared for element type "subclass".
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.handleStartElement(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.dom4j.io.SAXReader.read(SAXReader.java:339)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:283)
... 23 more



mapping file is still the same and it contains the table attribute

The doctype should read

it hasn't changed anything

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<subclass name="dbfps.partner.po.FPSGeschaeftspartnerPO"
extends="com.carano.cbf.partner.po.GeschaeftspartnerPO" table="AV_G_PARTNER">
<key column="G_PARTNER_ID"/>
<property name="bahnstelle" column="BAHNSTELLE"/>
<property name="kostenstelle" column="KOSTENSTELLE"/>
<!-- Log timestamps/ ids -->
<property name="IDMitarbeiterInsert" column="MITARB_ID_INS" not-null="false"
unique="false" />
<property name="IDMitarbeiterUpdate" column="MITARB_ID_UPD" not-null="false"
unique="false" />
<property name="TSInsert" column="TS_INSERT" not-null="false" unique="false"
/>
<property name="TSUpdate" column="TS_UPDATE" not-null="false" unique="false"
/>
</subclass>
</hibernate-mapping>

I don't think the table attribute is needed for <subclass>, try leaving it out. Look at the DTD and try to be conformant to it, it should work.