[jboss-user] [JBoss Seam] - selectItems and entities with inheritance

[adamw]

Hello,

I have an abstract entity Feed and two entities that inherit from it, RemoteFeed and AggregatedFeed. I have the following on my page:

  | <h:selectManyCheckbox value="#{aggregatedFeedMod.selectedFeeds}" layout="pageDirection">
  |    <s:selectItems var="feed" value="#{aggregatedFeedMod.availableFeeds}"
  |                                    label="#{feed.displayName}" />
  |    <s:convertEntity />
  | </h:selectManyCheckbox>
  | 
where aggregatedFeedMod.availableFeeds is of type List < Feed >; the list contains entities of both subclasses.

Here's the exception I have when I try to display that:

  | 15:52:06,089 ERROR [STDERR] Nov 26, 2007 3:52:06 PM com.sun.facelets.FaceletViewHandler handleRenderException
  | SEVERE: Error Rendering View[/manage/aggregated/aggregated_edit.xhtml]
  | java.lang.IllegalArgumentException: Cannot convert org.jboss.blog.model.AggregatedFeed at d19 of type class org.jboss.blog.model.AggregatedFeed to class org.jboss.blog.model.RemoteFeed
  |         at org.jboss.el.lang.ELSupport.coerceToType(ELSupport.java:358)
  |         at org.jboss.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:46)
  |         at org.jboss.seam.el.SeamExpressionFactory.coerceToType(SeamExpressionFactory.java:70)
  |         at com.sun.faces.renderkit.html_basic.SelectManyCheckboxListRenderer.renderOption(SelectManyCheckboxListRenderer.java:275)
  |         at com.sun.faces.renderkit.html_basic.SelectManyCheckboxListRenderer.encodeEnd(SelectManyCheckboxListRenderer.java:146)
  |         at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:836)
  |         at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:279)
  |         at com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:117)
  |         at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
  |         at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:271)
  |         at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)
  |         at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
  |         at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
  |         at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
  |         at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
  |         at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
  |         at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
  |         at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
  |         at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
  |         at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:216)
  |         at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
  |         at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |         at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.jboss.shotoku.web.ResourcesFilter.doFilter(ResourcesFilter.java:183)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |         at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |         at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |         at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |         at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |         at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |         at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |         at java.lang.Thread.run(Thread.java:613)
  | 

I'm not quite sure if it's a Seam issue, or a JBoss EL/JSF RI issue.

-- 
Adam

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