Simple table with foreign index

[Max Qua]

Hi,

I have a problem defining the table and the object for a table with only one foreign key.
There are two tables:
User (with id and other fields)
ChessWaitingList which has only one field "player" that is the id of a user in the User table.
I tried several configuration but without success. How can I implement this using hibernate? I thought it was a simple task...
Anyway this is my last try ...

Code:
<?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 package="com.hibernate">
<class name="ChessWaitingList" table="chess_waiting_list" dynamic-insert="true" dynamic-update="true">
     <id name="player" column="player">
      <generator class="foreign">
         <param name="property">player</param>
      </generator>
   </id> 
  <one-to-one name="player" class="User" constrained="true"/>
</class>
</hibernate-mapping>

    
public class ChessWaitingList {
   private User player;
   
   public User getPlayer() {
      return player;
   }

   public void setPlayer(User u) {
      this.player = u;
   }
   
}

...and the error I got is:

Code:

java.lang.ClassCastException: org.hibernate.type.SerializableType cannot be cast to org.hibernate.type.EntityType
   at org.hibernate.id.ForeignGenerator.generate(ForeignGenerator.java:74)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:122)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
   at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546)
   at com.web.UserCoordinator.addChessWaitingPlayer(UserCoordinator.java:1399)
   at com.home.HomeBackingBean.setChallengeable(HomeBackingBean.java:15)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
   at java.lang.reflect.Method.invoke(Unknown Source)
   at javax.el.BeanELResolver.setValue(BeanELResolver.java:108)
   at javax.el.CompositeELResolver.setValue(CompositeELResolver.java:68)
   at com.sun.faces.el.FacesCompositeELResolver.setValue(FacesCompositeELResolver.java:100)
   at org.apache.el.parser.AstValue.setValue(AstValue.java:132)
   at org.apache.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:249)
   at org.apache.jasper.el.JspValueExpression.setValue(JspValueExpression.java:85)
   at javax.faces.component.UIInput.updateModel(UIInput.java:771)
   at javax.faces.component.UIInput.processUpdates(UIInput.java:703)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1081)
   at javax.faces.component.UIForm.processUpdates(UIForm.java:261)
   at org.ajax4jsf.component.AjaxViewRoot$2.invokeContextCallback(AjaxViewRoot.java:416)
   at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:238)
   at org.ajax4jsf.component.AjaxViewRoot.processUpdates(AjaxViewRoot.java:432)
   at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
   at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
   at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
   at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
   at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
   at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)
   at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:285)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:341)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at com.authorization.AuthorizationFilter.doFilter(AuthorizationFilter.java:58)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
   at java.lang.Thread.run(Unknown Source)

Please help