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Author Message
pest666
 Post subject: many-to-many mapping
PostPosted: Mon Nov 22, 2004 6:55 am 
Newbie

Joined: Mon Nov 22, 2004 6:38 am
Posts: 1
Hi..

I have a problem mapping my many-to-many relations, and cant figure out where the problem is..

Im using XDoclet to generate my mapping files.

I have a very simple setup:

3 tables

Account
-KEY
-USERNAME
-PASSWORD

Group
-KEY
-NAME

Group-Account
-GROUP_KEY
-ACCOUNT_KEY

I now need a meny-to-many relation, sp an Account can belong to many groups, through the Group-Account table.

My Account XDoclet mapping:

/**
* @hibernate.set role="groups" table="ACCOUNT_GROUP"
* cascade="all" readonly="true"
* @hibernate.collection-key column="ACCOUNT_KEY"
* @hibernate.collection-many-to-many
* class="dk.videone.voware.hibernate.Group" column="GROUP_KEY"
* @return java.util.Set
*
*/
public List getGroups() {
return groups;
}

The generated Account.hbm.xml:

<set
role="groups"
table="ACCOUNT_GROUP"
lazy="false"
readonly="true"
cascade="all"
sort="unsorted"
>

<key
column="ACCOUNT_KEY"
>
</key>

<many-to-many
class="dk.videone.voware.hibernate.Group"
column="GROUP_KEY"
outer-join="auto"
/>

</set>



I have a test servlet to add Groups & Accounts
but as soon as i run the servlet i get a lot of exceptions:
it looks like it cant read Account.hbm.xml but.... ??

what is wrong..

Im using JBoss3.0 + MaxDB 7.5


10:35:50,484 INFO [Configuration] Configuration resource: /hibernate.cfg.xml
10:35:50,531 INFO [Configuration] Mapping resource: dk/videone/voware/hibernate/Account.hbm.xml
10:35:53,687 INFO [Binder] Mapping class: dk.videone.voware.hibernate.Account -> ACCOUNT
10:35:53,812 ERROR [Configuration] Could not configure datastore from input stream
java.lang.NullPointerException
at net.sf.hibernate.util.StringHelper.qualify(StringHelper.java:241)
at net.sf.hibernate.cfg.Binder.bindCollection(Binder.java:509)
at net.sf.hibernate.cfg.Binder$2.create(Binder.java:1434)
at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:1028)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:362)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1256)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:252)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:288)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:336)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:1013)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:969)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
at dk.videone.voware.hibernate.HibernateUtil.<clinit>(Unknown Source)
at dk.videone.voware.actions.TestAction.execute(Unknown Source)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:273)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:243)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:146)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:122)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
10:35:54,046 ERROR [HibernateUtil] Initial SessionFactory creation failed.
net.sf.hibernate.MappingException: Error reading resource: dk/videone/voware/hibernate/Account.hbm.xml
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:339)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:1013)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:969)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
at dk.videone.voware.hibernate.HibernateUtil.<clinit>(Unknown Source)
at dk.videone.voware.actions.TestAction.execute(Unknown Source)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:273)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:243)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:146)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:122)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
Caused by: net.sf.hibernate.MappingException: java.lang.NullPointerException
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:296)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:336)
... 43 more
Caused by: java.lang.NullPointerException
at net.sf.hibernate.util.StringHelper.qualify(StringHelper.java:241)
at net.sf.hibernate.cfg.Binder.bindCollection(Binder.java:509)
at net.sf.hibernate.cfg.Binder$2.create(Binder.java:1434)
at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:1028)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:362)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1256)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:252)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:288)
... 44 more
10:35:54,343 ERROR [Engine] StandardWrapperValve[webwork]: Servlet.service() for servlet webwork threw exception
java.lang.ExceptionInInitializerError
at dk.videone.voware.hibernate.HibernateUtil.<clinit>(Unknown Source)
at dk.videone.voware.actions.TestAction.execute(Unknown Source)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:273)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:243)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:146)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:122)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
Caused by: net.sf.hibernate.MappingException: Error reading resource: dk/videone/voware/hibernate/Account.hbm.xml
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:339)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:1013)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:969)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:883)
... 39 more
Caused by: net.sf.hibernate.MappingException: java.lang.NullPointerException
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:296)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:336)
... 43 more
Caused by: java.lang.NullPointerException
at net.sf.hibernate.util.StringHelper.qualify(StringHelper.java:241)
at net.sf.hibernate.cfg.Binder.bindCollection(Binder.java:509)
at net.sf.hibernate.cfg.Binder$2.create(Binder.java:1434)
at net.sf.hibernate.cfg.Binder.propertiesFromXML(Binder.java:1028)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:362)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1256)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:252)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:288)
... 44 more
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 Profile  
 
RichMacDonald
 Post subject:
PostPosted: Thu Dec 01, 2005 12:59 am 
Beginner
Beginner

Joined: Sat Oct 29, 2005 2:05 am
Posts: 21
Location: Kansas City, KS
Can't really help you with the error (set your debugger to trap null pointer exceptions), but whats with that readonly="true" attribute? What version of hibernate are you using? In rc3, there is no such thing as a readonly string. You should be getting a SAXParseException.

As a hijacking aside, I found your post because I'm searching for a way to declare a <set> attribute as readonly. i'm using mutable="false", but hibernate is going right on ahead and deleting/inserting it. So we both may be looking for much the same thing :-)
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 Profile  
 
rajasaur
 Post subject:
PostPosted: Thu Dec 01, 2005 1:21 am 
Senior
Senior

Joined: Tue Aug 23, 2005 8:52 am
Posts: 181
Change
/**
* @hibernate.set role="groups" table="ACCOUNT_GROUP"
to
/**
* @hibernate.set name="groups" table="ACCOUNT_GROUP"

Your mapping should be something like

<set name="groups" ....
rather than
<set role="groups"
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