扩展@FacesComponent作为复合接口componentType不会呈现任何内容 [英] Extended @FacesComponent as composite interface componentType renders nothing

问题描述

我正在尝试扩展JSF的组件类(使其成为h:panelGroup之一)并通过复合组件进行呈现:

I'm trying to extend JSF's component class (let it be one of h:panelGroup) and render it via composite component:

第1步:

@FacesComponent(value="customPanel")
public class CustomPanel extends HtmlPanelGroup { // or UIPanel
}

第2步:

<!-- INTERFACE -->
<composite:interface componentType="customPanel"/>

<!-- IMPLEMENTATION -->
<composite:implementation>
  <h:outputText value="Some text:"/>
  <composite:insertChildren/>
</composite:implementation>

第3步:

<xyz:panel>Hello world!</xyz:panel>

什么也不显示.我在这里想念什么?

shows nothing. What am I missing here?

推荐答案

复合组件的支持组件必须实现

The backing component of the composite component must implement NamingContainer and the getFamily() must return javax.faces.NamingContainer. See also description of the componentType attribute in the <composite:interface> tag documentation.

@FacesComponent(value="customPanel")
public class CustomPanel extends HtmlPanelGroup implements NamingContainer {

    @Override
    public String getFamily() {
        return UINamingContainer.COMPONENT_FAMILY;
    }

}

您还可以选择扩展 UINamingContainer 代替，这样您就可以省略getFamily().

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