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Board index » Hibernate & Java Persistence » Hibernate Users (Français)

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Author Message
herisson
 Post subject: ClassCastException sur un proxy CGLIB
PostPosted: Wed May 10, 2006 6:30 am 
Newbie

Joined: Tue Oct 25, 2005 4:36 am
Posts: 1
Need help with Hibernate? Read this first:
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Hibernate version:
3.2.0rc2 et rc1
Mapping documents:

Code:
@Entity
@Table(name="users")
@Inheritance(strategy=InheritanceType.JOINED)
public abstract class User implements Cloneable, Comparable, Serializable {
//Des attributs et leurs setteurs/getteurs dont des collections en lazy
}

Code:
@Entity
@Table(name="communityusers")
public class CommunityUser extends User {
    private boolean guest;
    /**
    * @return Returns the guest.
    */
   public boolean isGuest() {
      return guest;
   }

   /**
    * @param guest The guest to set.
    */
   public void setGuest(boolean guest) {
      this.guest = guest;
   }
//Des attributs et leurs setteurs/getteurs mais pas de collection
}

Code between sessionFactory.openSession() and session.close():
Code:
User user = récupéré au travers d'un objet (getUser())

((CommunityUser)user).isGuest()


Full stack trace of any exception that occurs:
Code:
ERROR 10 mai 2006 11:57:20 [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/].[jsp]] => "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.ClassCastException: be.loop.jbb.bo.User$$EnhancerByCGLIB$$412998cf
   at be.loop.jbb.web.jsp.tags.UserDisplayTag.doTag(UserDisplayTag.java:51)
   at org.apache.jsp.WEB_002dINF.jsps.common.fragments.questiondisplay_jsp._jspService(org.apache.jsp.WEB_002dINF.jsps.common.fragments.questiondisplay_jsp:330)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
   at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
   at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
   at org.apache.jsp.WEB_002dINF.jsps.common.fragments.questiondetaileddisplay_jsp._jspService(org.apache.jsp.WEB_002dINF.jsps.common.fragments.questiondetaileddisplay_jsp:182)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
   at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
   at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
   at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:604)
   at be.loop.jbb.web.jsp.tags.QuestionDisplayTag.singleQuestion(QuestionDisplayTag.java:75)
   at be.loop.jbb.web.jsp.tags.QuestionDisplayTag.answerMap(QuestionDisplayTag.java:121)
   at be.loop.jbb.web.jsp.tags.QuestionDisplayTag.doTag(QuestionDisplayTag.java:50)
   at org.apache.jsp.WEB_002dINF.jsps.common.fragments.resultview_jsp._jspService(org.apache.jsp.WEB_002dINF.jsps.common.fragments.resultview_jsp:603)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
   at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
   at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
   at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:604)
   at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:101)
   at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:137)
   at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:758)
   at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:890)
   at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:460)
   at org.apache.jsp.WEB_002dINF.jsps.common.templates.body_005fblank_jsp._jspx_meth_tiles_insert_0(org.apache.jsp.WEB_002dINF.jsps.common.templates.body_005fblank_jsp:96)
   at org.apache.jsp.WEB_002dINF.jsps.common.templates.body_005fblank_jsp._jspService(org.apache.jsp.WEB_002dINF.jsps.common.templates.body_005fblank_jsp:63)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
   at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
   at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
   at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:604)
   at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:101)
   at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:137)
   at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:758)
   at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:890)
   at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:460)
   at org.apache.jsp.WEB_002dINF.jsps.common.templates.main_jsp._jspx_meth_tiles_insert_2(org.apache.jsp.WEB_002dINF.jsps.common.templates.main_jsp:391)
   at org.apache.jsp.WEB_002dINF.jsps.common.templates.main_jsp._jspService(org.apache.jsp.WEB_002dINF.jsps.common.templates.main_jsp:282)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
   at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
   at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
   at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1056)
   at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:261)
   at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:237)
   at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:300)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:231)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
   at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at be.loop.jbb.web.filter.CountryFilter.doFilter(CountryFilter.java:66)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at be.loop.jbb.web.filter.CompressionFilter.doFilter(CompressionFilter.java:60)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at be.loop.jbb.web.filter.LoginFilter.doFilter(LoginFilter.java:85)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)


Je n'ai jamais cette exception dans toute mon application sauf dans un Tag (javax.servlet.jsp.tagext.SimpleTagSupport).
Dans ce tag, je liste des Users ; je n'obtiens cette exception que une fois sur trois ou quatre. La liste se trouve dans une jsp qui appelle le tag en lui donnant le User en paramètre.
Ma page est affichée correctement, même ce qui provient spécifiquement du CommunityUser.

Si je teste :
Code:
System.out.println(user instanceof CommunityUser);
((CommunityUser)user).isGuest()
System.out.println(user instanceof CommunityUser);

j'obtiens true et true quand l'exception n'est pas lancée ; false et true quand j'obtiens l'exception.

Merci pour les idées qui me permettraient d'éviter cette exception :)

J'ai essayé d'être le plus précis possible sans remettre tout mon code ;)
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