richfaces3.3 tabPanel 使用报空指针 已解决

 

最近在使用richfaces-ui-3.3.3.Final的rich:tabPanel的时候，没有给rich:tab设置name属性，然后就会在表单提交的时候报空指针，然后查看源码后，发现UITabPanel类使用name进行比较是否是该tab

 

官方使用手册文档

 

http://docs.jboss.org/richfaces/latest_3_3_X/en/devguide/html/rich_tabPanel.html

 

针对于tabPanel的说明:

 

There is also the "selectedTab" attribute. The attribute keeps an active tab name; therefore, an active tabPanel could be changed with setting a name of the necessary tab to this attribute.

 

粗略翻译：有一个selectedTab属性。该属性保持一个活动的tab name；因此，一个活动的tabPanel被改变，就伴随着设定一个name属性给该tab

 

 

 

 

空指针：

 

Caused by: java.lang.NullPointerException

 

at org.richfaces.component.UITabPanel.queueEvent(UITabPanel.java:266)

 

at javax.faces.event.FacesEvent.queue(FacesEvent.java:130)

 

at org.richfaces.renderkit.TabPanelRendererBase.doDecode(TabPanelRendererBase.java:106)

 

at org.ajax4jsf.renderkit.RendererBase.decode(RendererBase.java:75)

 

at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:790)

 

at javax.faces.component.UIInput.decode(UIInput.java:744)

 

at org.richfaces.component.UISwitchablePanel.processDecodes(UISwitchablePanel.java:167)

 

at org.richfaces.component.UITabPanel.processDecodes(UITabPanel.java:155)

 

at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1042)

 

at org.ajax4jsf.component.UIAjaxForm.processDecodes(UIAjaxForm.java:65)

 

at org.ajax4jsf.component.UIAjaxRegion.processDecodes(UIAjaxRegion.java:103)

 

at org.ajax4jsf.component.AjaxViewRoot$1.invokeContextCallback(AjaxViewRoot.java:400)

 

at org.ajax4jsf.component.ContextCallbackWrapper.invokeContextCallback(ContextCallbackWrapper.java:44)

 

at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:1253)

 

... 45 more

 

页面代码：

 

 

<a4j:form id="budgetform">

 

<rich:tabPanel id="tpBudgetCollection" switchType="client" immediate="true" selectedTab="tbBudget" >

 

<!-- name 设置成formID:tabId 即budgetform:tbBudget-->

 

 <rich:tab id="tbBudget" label="aa" name="budgetform:tbBudget" immediate="true">

 

</rich:tab>

 

<!-- name 设置成formID:tabId 即budgetform:tbCollection -->

 

<rich:tab id="tbCollection" label="bb" name="budgetform:tbCollection" immediate="true">

 

</rich:tab>

 

<a4j:commandButton id="submitForm" value="submit" action="#{testController.save}" ></a4j:commandButton>

 

 

</a4j:form>

 

 

 

richfaces-ui-3.3.3.Final源码下载页面：http://www.jboss.org/richfaces/download/stable

 

查看源码：

 

private UITab processedTab(UIComponent component, Object object){

 

    if (object != null) {

 

             return getTabWithName(object);

 

        }

 

        return (UITab)component;

 

    }

 

 

 

    //TODO use getTabs() iterator

 

    private UITab getTabWithName(Object tabName){

 

    List children = getChildren();

 

    for (Iterator iterator = children.iterator(); iterator.hasNext();) {

 

UIComponent childComponent = (UIComponent) iterator.next();

 

                        //因在这里tabName为""，没有一个匹配上的，所以返回null。

 

if(childComponent instanceof UITab && ((UITab)childComponent).getName().equals(tabName)){

 

return (UITab)childComponent; 

 

}

 

}

 

    return null;

 

    }

 

 

 

    public void queueEvent(FacesEvent event) {

 

    if(event instanceof SwitchablePanelSwitchEvent && this.equals(event.getComponent())){

 

    SwitchablePanelSwitchEvent switchEvent = (SwitchablePanelSwitchEvent)event; 

 

    UITab tab = processedTab(switchEvent.getEventSource(),switchEvent.getValue());    

 

    //Check if target Tab is immediate

 

                //在这里就会报空指针异常

 

    processedTabImmediate = tab.isImmediate();

 

    }

 

    if(event instanceof ActionEvent && event.getComponent()instanceof UITab){

 

    if(isImmediate()){

 

    event.setPhaseId(PhaseId.APPLY_REQUEST_VALUES);

 

    }

 

    }

 

    super.queueEvent(event);

 

    }