Primefaces OverlayPanel複合材料部件

Question

裏面我正在開發的複合成分，以集中和重用primefaces組件：

<?xml version="1.0"?> 
<ui:composition xmlns="http://www.w3.org/1999/xhtml" 
xmlns:c="http://java.sun.com/jsp/jstl/core" 
xmlns:f="http://java.sun.com/jsf/core" 
xmlns:h="http://java.sun.com/jsf/html" 
xmlns:p="http://primefaces.org/ui" 
xmlns:ui="http://java.sun.com/jsf/facelets" 
xmlns:bridge="http://portletfaces.org/bridge" 
xmlns:m3="http://java.sun.com/jsf/composite/m3jsf" 
xmlns:Portlet="http://java.sun.com/portlet_2_0" 
xmlns:composite="http://java.sun.com/jsf/composite"> 
<composite:interface> 
    <composite:attribute name="rendered" type="java.lang.Boolean" default="true"/> 
</composite:interface> 
<composite:implementation> 
    <span id="#{cc.clientId}"> 
     <p:overlayPanel id="idPanelloListaDatiFullScreen" dynamic="true" appendToBody="false" 
     styleClass="m3PanelListaDati" binding="#{m3DataTableBackingBean.bindingVarOverlay}" 
     rendered="#{cc.attrs.rendered}"> 
     </p:overlayPanel> 
     <p:panel id="idPanelloListaDati" styleClass="m3PanelListaDati" 
     rendered="#{cc.attrs.rendered}"> 
      <composite:insertChildren></composite:insertChildren> 
     </p:panel> 
    </span> 
</composite:implementation> 

我用它在一個視圖：

<m3:myCompositePanel id="idCompositePanel/> 

但當視圖呈現異常時：

Caused by: java.lang.NullPointerException 
at javax.faces.component.UIComponentBase.findComponent(UIComponentBase.java:567) 
at org.primefaces.component.overlaypanel.OverlayPanelRenderer.encodeScript(OverlayPanelRenderer.java:67) 
at org.primefaces.component.overlaypanel.OverlayPanelRenderer.encodeEnd(OverlayPanelRenderer.java:37) 
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:881) 
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312) 
at com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:105) 
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:851) 
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779) 
at com.sun.faces.renderkit.html_basic.CompositeRenderer.encodeChildren(CompositeRenderer.java:78) 
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:851) 
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779) 
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168) 
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:851) 
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779) 
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782) 
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:439) 
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124) 
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286) 
at com.liferay.faces.bridge.application.ViewHandlerCompatImpl.renderView(ViewHandlerCompatImpl.java:35) 
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286) 
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) 
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
... 219 more 

我使用PirmeFaces 3.5.23，鑽嘴魚科2.1.21和我正在開發中的Liferay 6.1.3ga3和橋樑的portlet 3.1.3ga4

感謝您的幫助

Answer 1

67號線PrimeFaces OverlayPanelRenderer.java類正試圖解析的屬性的值。看起來您可能忘記爲您的p：overlayPanel中的for屬性指定一個值。