I'm trying to dynamically remove tabs within a TabPanel, using a function that calls a removal method on the main bean. When I do this however, I keep getting the following NPE:
java.lang.NullPointerException
at org.richfaces.component.AbstractTabPanel.getActiveItem(AbstractTabPanel.java:64)
Here's the relevant code snippets ...
testdelete.xhtml
<h:form>
<a4j:outputPanel id="mainTabPanel">
<rich:tabPanel id="mainTab" activeItem="TAB1" switchType="server">
<c:forEach items="#{TabBean.listOfTabs}" var="tab">
<rich:tab id="#{tab.tabId}">
<f:facet name="header">
<h:outputText value="#{tab.tabHeader} " />
<h:commandLink value="Close" rendered="#{tab.isClosable}" onclick="removeTab('#{tab.tabId}');"/>
</f:facet>
<h:outputText value="text text text"/>
</rich:tab>
</c:forEach>
</rich:tabPanel>
</a4j:outputPanel>
<a4j:jsFunction name="removeTab"
action="#{TabBean.removeTab}"
render="mainTabPanel"
oncomplete="#{rich:component('mainTab')}.switchToItem('TAB1');">
<a4j:param name="removeTabId"/>
</a4j:jsFunction>
</h:form>
TabBean.java
- this has the obvious getters/setters used, and the following methods for removing a tab ...
public Tab getTabById (String tabId)
{
for (Tab currentTab: listOfTabs )
{
if ( currentTab.getTabId().equals(tabId))
{
return currentTab;
}
}
return null;
}
public void removeTab () throws Exception
{
setActiveTabId("TAB1");
String tabIdToRemove = FacesContext.getCurrentInstance().getExternalContext() .getRequestParameterMap().get("removeTabId");
Tab currentTab = getTabById(tabIdToRemove);
if ( currentTab != null )
{
listOfTabs.remove(currentTab);
}
else
{
throw new Exception("Tab Id parameter is null");
}
}
