5 Replies Latest reply on Jun 8, 2011 1:16 AM by nikh123123

Dynamic Tab deletion error

nikh123123 Apr 18, 2011 4:43 PM

I get the following error while trying to delete tab

java.lang.NullPointerException
          at org.richfaces.component.AbstractTabPanel.getActiveItem(AbstractTabPanel.java:64)
          at org.richfaces.component.AbstractTogglePanel.encodeBegin(AbstractTogglePanel.java:168)
          at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650)
          at org.richfaces.renderkit.RendererBase.renderChildren(RendererBase.java:278)
          at org.richfaces.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:58)
          at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
          at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:304)
          at com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:105)
          at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
          at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
          at org.richfaces.context.ExtendedPartialViewContextImpl$RenderVisitCallback.visit(ExtendedPartialViewContextImpl.java:514)
          at org.richfaces.context.BaseExtendedVisitContext.invokeVisitCallback(BaseExtendedVisitContext.java:337)
          at javax.faces.component.UIComponent.visitTree(UIComponent.java:1485)
          at javax.faces.component.UIComponent.visitTree(UIComponent.java:1496)
          at javax.faces.component.UIForm.visitTree(UIForm.java:335)
          at javax.faces.component.UIComponent.visitTree(UIComponent.java:1496)
          at javax.faces.component.UIComponent.visitTree(UIComponent.java:1496)
          at org.richfaces.context.ExtendedPartialViewContextImpl.processPartialRenderPhase(ExtendedPartialViewContextImpl.java:284)
          at org.richfaces.context.ExtendedPartialViewContextImpl.processPartial(ExtendedPartialViewContextImpl.java:206)
          at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:974)
          at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
          at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:388)
          at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
          at com.ocpsoft.pretty.faces.application.PrettyViewHandler.renderView(PrettyViewHandler.java:159)
          at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:273)
          at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
          at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
          at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
          at javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
          at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:115)
          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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
          at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:444)
          at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
          at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:310)
          at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:107)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
          at com.googlecode.webutilities.filters.CompressionFilter.doFilter(CompressionFilter.java:94)
          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:235)
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
          at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
          at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
          at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
          at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
          at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
          at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
          at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
          at java.lang.Thread.run(Thread.java:619)

<h:panelGroup layout="block" class="container clearfix" id="container">

<rich:tabPanel id="tabs" switchType="ajax" style="height:100%" itemChangeListener="#{us.changeTabName}" activeItem="#{us.currentTabId}">

<c:forEach items="#{us.tabs}" var="tab" varStatus="it">

<rich:tab

name="#{tab.id}"

id="#{tab.id}"

data="#{tab}"

oncomplete="#{tab.onComplete}">

<f:facet name="header">

<h:panelGroup>

<h:panelGroup style="width:105px; float:left;">

<h:outputText value="#{tab.header}" />

</h:panelGroup>

<h:panelGroup style="float: right;margin-top: -5px;">

<h:graphicImage library="images" name="btn_cancel.png"

rendered="#{tab.isClosable}"

style="cursor:pointer;border:0;"

onclick="closeTab('#{tab.id}'); event.stopPropagation();"/>

</h:panelGroup>

</f:facet>

<ui:include src="#{tab.includePath}" />

</rich:tab>

</c:forEach>

</rich:tabPanel>

</h:panelGroup>

and the delete tab function is

<a4j:jsFunction data="#{us.currentTabId}" action="#{us.closeTab}" name="closeTab" render="container, tabs">

<a4j:param name="currentTabId"/>

</a4j:jsFunction>

</h:form>

What am I doing wrong?

1. Dynamic Tab deletion error

ilya_shaikovsky Apr 19, 2011 5:22 AM (in response to nikh123123)

do you assigning new tab to activeItem after current one deletion?
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2. Re: Dynamic Tab deletion error

nikh123123 Apr 19, 2011 7:20 AM (in response to ilya_shaikovsky)
@Ilya
Yes I am. Following is my code for closeTab method

public void closeTab(){ // getting tab id(i.e. name) to be deleted from request params String currentTabId = FacesContext .getCurrentInstance().getExternalContext() .getRequestParameterMap().get("currentTabId"); // This is my POJO for tabs DashboardTab removedTab = null; for(DashboardTab tab: this.tabs){ if(tab.getId().equals(currentTabId)) { removedTab = tab; break; } } if (null != removedTab && removedTab.getIsClosable()){ this.currentTabId="home"; // home is my first tab System.out.println("Removing tab : "+removedTab.getId() ); // removing from list this.tabs.remove(removedTab) ; } }
Two things which I observed were
When I trigger commandLink to create first tab, the page is switched to the newly created tab. After this if I go back to my first tab and create another tab, the page is not automatically switched although the tab gets created.
After getting the
java.lang.NullPointerException
at org.richfaces.component.AbstractTabPanel.getActiveItem(AbstractTabPanel.java:64) error, if i refresh the page, I'm switched back to dashboard.
What am I missing here?
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3. Re: Dynamic Tab deletion error

nikh123123 Apr 26, 2011 9:50 AM (in response to nikh123123)

@Ilya, it will be great if you could shed some light here! thanks.
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4. Re: Dynamic Tab deletion error

liffey May 30, 2011 1:31 PM (in response to nikh123123)

I'm also getting this error - has any solution been found?
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5. Re: Dynamic Tab deletion error

nikh123123 Jun 8, 2011 1:16 AM (in response to liffey)

@Liffey, I switched to the client mode after all, and in client mode this problem does not occur. I opted for client mode for following reasons
1) I do not get the above error
2) From what I read around, people prefer client switch rather than a server or ajax switch, cause it makes the user experience better. The user can quickly navigate between tabs since the pages are preloaded.
3) I could afford pre-loading two tabs with client mode.

Its not a solution, but for me forunately the client mode was suitable so I could opt it.
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