> I found something surprising, while working on a Tomahawk application, in
> which I added Trinidad for a couple of components.
> Trinidad overrides default renderers of some  javax.faces.* components like
> Form, HtmlCommandButton and HtmlCommandLink.

indeed.

>
> Why is this needed?

because the JSF spec is poor ?
Well... :) These component details know to much abo

> I noticed it adds some custom scripts.
> BUT why should it be so intrusive in the default renderers?
>
> The problem that made me find this was that I got some exceptions in the
> tomahawk PPR.
>  Except on some pages, the only Trinidad component I use is tr:document to
> have the skinning enabled.
> I definitely expect for the Tomahawk PPR within a h:form and containing an
> h:commandButton to work.
>
> i got this stack trace on a PPR submit:
>
> javax.faces.FacesException: Exception while calling encodeEnd on component :
> {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId:
> /pages/configuration/configAssessmentModuleEdit.xhtml][Class:
> org.apache.myfaces.trinidad.component.core.CoreDocument,Id: j_id1][Class:
> javax.faces.component.html.HtmlForm,Id: mform][Class:
> org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id:
> moduleEditTab][Class: org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id:
> childrenTab][Class: org.apache.myfaces.custom.ppr.PPRPanelGroup,Id:
> pprQuestionEdit][Class: javax.faces.component.html.HtmlPanelGroup,Id:
> j_id174]}
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:559)
>         at
> org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.renderChild(RendererUtils.java:420)
>         at
> org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils.renderChildren(RendererUtils.java:401)
>         at
> org.apache.myfaces.custom.ppr.PPRPanelGroupRenderer.encodeChildren(PPRPanelGroupRenderer.java:93)
>         at
> javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:543)
>         at
> org.apache.myfaces.custom.ppr.PPRPhaseListener.encodeTriggeredComponents(PPRPhaseListener.java:288)
>         at
> org.apache.myfaces.custom.ppr.PPRPhaseListener.processPartialPageRequest(PPRPhaseListener.java:169)
>         at
> org.apache.myfaces.custom.ppr.PPRPhaseListener.beforePhase(PPRPhaseListener.java:94)
>         at
> org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersBefore(PhaseListenerManager.java:73)
>         at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:134)
>         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:152)
>         at
> org.apache.myfaces.webapp.MyFacesServlet.service(MyFacesServlet.java:100)
>         at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>         at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>         at
> com.db.gto.coo.itsg.gui.login.LoginFilter.doHttpFilter(LoginFilter.java:131)
>         at
> com.db.gto.coo.itsg.gui.filter.SpringJSFFilterBase.doFilter(SpringJSFFilterBase.java:47)
>         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:226)
>         at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>         at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>         at
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:70)
>         at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>         at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>         at
> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:63)
>         at
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
>         at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>         at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>         at
> org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
>         at
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
>         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:263)
>         at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>         at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
>         at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>         at java.lang.Thread.run(Thread.java:619)
> Caused by: javax.faces.FacesException: Exception while calling encodeEnd on
> component : {Component-Path : [Class:
> javax.faces.component.UIViewRoot,ViewId:
> /pages/configuration/configAssessmentModuleEdit.xhtml][Class:
> org.apache.myfaces.trinidad.component.core.CoreDocument,Id: j_id1][Class:
> javax.faces.component.html.HtmlForm,Id: mform][Class:
> org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id:
> moduleEditTab][Class: org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id:
> childrenTab][Class: org.apache.myfaces.custom.ppr.PPRPanelGroup,Id:
> pprQuestionEdit][Class: javax.faces.component.html.HtmlPanelGroup,Id:
> j_id174][Class: org.apache.myfaces.custom.subform.SubForm,Id:
> questionForm][Class: javax.faces.component.html.HtmlPanelGrid,Id: j_id181]}
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:559)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:515)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren(RendererUtils.java:492)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:513)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren(RendererUtils.java:492)
>         at
> org.apache.myfaces.shared_impl.renderkit.html.HtmlGroupRendererBase.encodeEnd(HtmlGroupRendererBase.java:92)
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:556)
>         ... 41 more
> Caused by: javax.faces.FacesException: Exception while calling encodeEnd on
> component : {Component-Path : [Class:
> javax.faces.component.UIViewRoot,ViewId:
> /pages/configuration/configAssessmentModuleEdit.xhtml][Class:
> org.apache.myfaces.trinidad.component.core.CoreDocument,Id: j_id1][Class:
> javax.faces.component.html.HtmlForm,Id: mform][Class:
> org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id:
> moduleEditTab][Class: org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id:
> childrenTab][Class: org.apache.myfaces.custom.ppr.PPRPanelGroup,Id:
> pprQuestionEdit][Class: javax.faces.component.html.HtmlPanelGroup,Id:
> j_id174][Class: org.apache.myfaces.custom.subform.SubForm,Id:
> questionForm][Class: javax.faces.component.html.HtmlPanelGrid,Id:
> j_id181][Class: javax.faces.component.html.HtmlPanelGroup,Id: j_id191]}
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:559)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:515)
>         at
> org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.renderChildren(HtmlGridRendererBase.java:221)
>         at
> org.apache.myfaces.shared_impl.renderkit.html.HtmlGridRendererBase.encodeEnd(HtmlGridRendererBase.java:102)
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:556)
>         ... 47 more
> Caused by: javax.faces.FacesException: Exception while calling encodeBegin
> on component : {Component-Path : [Class:
> javax.faces.component.UIViewRoot,ViewId:
> /pages/configuration/configAssessmentModuleEdit.xhtml][Class:
> org.apache.myfaces.trinidad.component.core.CoreDocument,Id: j_id1][Class:
> javax.faces.component.html.HtmlForm,Id: mform][Class:
> org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPane,Id:
> moduleEditTab][Class: org.apache.myfaces.custom.tabbedpane.HtmlPanelTab,Id:
> childrenTab][Class: org.apache.myfaces.custom.ppr.PPRPanelGroup,Id:
> pprQuestionEdit][Class: javax.faces.component.html.HtmlPanelGroup,Id:
> j_id174][Class: org.apache.myfaces.custom.subform.SubForm,Id:
> questionForm][Class: javax.faces.component.html.HtmlPanelGrid,Id:
> j_id181][Class: javax.faces.component.html.HtmlPanelGroup,Id:
> j_id191][Class: javax.faces.component.html.HtmlCommandButton,Id:
> questionSave]}
>         at
> javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:531)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:506)
>         at
> org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren(RendererUtils.java:492)
>         at
> org.apache.myfaces.shared_impl.renderkit.html.HtmlGroupRendererBase.encodeEnd(HtmlGroupRendererBase.java:92)
>         at
> javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:556)
>         ... 51 more
> Caused by: java.lang.NullPointerException
>         at
> org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.AutoSubmitUtils.getFullPageSubmitScript(AutoSubmitUtils.java:105)
>         at
> org.apache.myfaces.trinidadinternal.renderkit.htmlBasic.HtmlCommandButtonRenderer.encodeBegin(HtmlCommandButtonRenderer.java:99)
>         at
> javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:528)
>         ... 55 more
>
> --
> Cristi Toth
>
> -------------
> Codebeat
> www.codebeat.ro



-- 
Matthias Wessendorf

further stuff:
blog: http://matthiaswessendorf.wordpress.com/
sessions: http://www.slideshare.net/mwessendorf
mail: matzew-at-apache-dot-org

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