[Hibernate-devel] Some Questions

[anatol <ana...@pm...>]

There are interesting thing

In my application I wrote

			List list = sess.find("from forum in class
avp.forum.biz.Forum");
			Forum[] res = new Forum[list.size()];

			Iterator iter = list.iterator();
			for( int i = 0; i < res.length; i++ )
				res[i] = (Forum)iter.next();

If this code runs as standalone application all execute without errors. 
But when this code runs inside my web application (Tapestry framework
2.1 under Jetty 4.0.1 web server) throws exception in last string

java.lang.ClassCastException   avp.forum.biz.Forum

The type of object witch returned by iterator is avp.forum.biz.Forum.
This is means that object not want to cast to his real type.
I think that is because of different ClassLoaders. 
Can anybody help me? How to avoid this error?


And another problem.

<!DOCTYPE hibernate-mapping SYSTEM
"http://hibernate.sourceforge.net/hibernate-mapping.dtd">
When I use DOCTYPE string in my *.hbm.xml file throws exception.

XMLHelper [INFO] Parsing XML: unknown system id
RelationalDatastore [ERROR] Could not configure datastore from input
stream
java.lang.NullPointerException
	at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:257)
	at
org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.jav
a:209)
	at
cirrus.hibernate.helpers.XMLHelper.parseInputSource(XMLHelper.java:48)
	at
cirrus.hibernate.impl.RelationalDatastore.storeInputStream(RelationalDat
astore.java:147)
	at
cirrus.hibernate.impl.RelationalDatastore.storeClass(RelationalDatastore
.java:166)
	at avp.forum.util.SessionHolder.init(SessionHolder.java:26)
	at avp.forum.webapp.ForumServlet.init(ForumServlet.java:30)
	at javax.servlet.GenericServlet.init(GenericServlet.java:258)
	at
net.sf.tapestry.ApplicationServlet.init(ApplicationServlet.java:408)
	at
org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:225)
	at
org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandl
er.java:414)
	at
org.mortbay.jetty.servlet.WebApplicationContext.start(WebApplicationCont
ext.java:446)
	at org.mortbay.http.HttpServer.start(HttpServer.java:189)
	at org.mortbay.jetty.Server.main(Server.java:349)
ForumServlet [ERROR] Hibernate mapping problem: null


But when don't use one than throws another: 

XMLHelper [INFO] Parsing XML: unknown system id
XMLHelper [ERROR] Error parsing XML: unknown system id(2)
org.xml.sax.SAXParseException: Document root element
"hibernate-mapping", must match DOCTYPE root "null".
	at
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Error
HandlerWrapper.java:232)
	at
org.apache.xerces.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.jav
a:173)
	at
org.apache.xerces.impl.XMLErrorReporter.reportError(XMLErrorReporter.jav
a:362)
	at
org.apache.xerces.impl.XMLErrorReporter.reportError(XMLErrorReporter.jav
a:296)
	at
org.apache.xerces.impl.dtd.XMLDTDValidator.rootElementSpecified(XMLDTDVa
lidator.java:2564)
	at
org.apache.xerces.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDVali
dator.java:2878)
	at
org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.
java:804)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(X
MLDocumentFragmentScannerImpl.java:752)
	at
org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRoot
ElementHook(XMLDocumentScannerImpl.java:927)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDis
patcher.dispatch(XMLDocumentFragmentScannerImpl.java:1519)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDo
cumentFragmentScannerImpl.java:333)
	at
org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardPars
erConfiguration.java:525)
	at
org.apache.xerces.parsers.StandardParserConfiguration.parse(StandardPars
erConfiguration.java:581)
	at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:147)
	at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:221)
	at
org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.jav
a:209)
	at
cirrus.hibernate.helpers.XMLHelper.parseInputSource(XMLHelper.java:48)
	at
cirrus.hibernate.impl.RelationalDatastore.storeInputStream(RelationalDat
astore.java:147)
	at
cirrus.hibernate.impl.RelationalDatastore.storeClass(RelationalDatastore
.java:166)
	at avp.forum.util.SessionHolder.init(SessionHolder.java:26)
	at avp.forum.webapp.ForumServlet.init(ForumServlet.java:30)
	at javax.servlet.GenericServlet.init(GenericServlet.java:258)
	at
net.sf.tapestry.ApplicationServlet.init(ApplicationServlet.java:408)
	at
org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:225)
	at
org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandl
er.java:414)
	at
org.mortbay.jetty.servlet.WebApplicationContext.start(WebApplicationCont
ext.java:446)
	at org.mortbay.http.HttpServer.start(HttpServer.java:189)
	at org.mortbay.jetty.Server.main(Server.java:349)




Can anybody explain me what's wrong?