JSF Tip #63 - Another way to override a renderer

In JSF Tip #32 - Override a JSF Renderer and JSF Tip #34 - Override a JSF Renderer and create a new tag for it we have described ways to override a renderer.

Well, would you believe there is yet another way?

It is as simple as adding an f:attribute tag as a child of the component you want to change the renderer for.

    <h:panelGroup>
        <f:attribute name="rendererType" value="MyRenderer"/>
    </h:panelGroup>
        

And then make sure you set it to the right componentFamily, in this case for an h:panelGroup the component family is "javax.faces.Panel" and that the value of the f:attribute matches up with the rendererType set for your renderer.

    @FacesRenderer(componentFamily = "javax.faces.Panel", rendererType = "MyRenderer")
    public class MyRenderer extends Renderer {

        @Override
        public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
            context.getResponseWriter().write("DEMO DEMO DEMO");
        }
    }
        

Posted October 16, 2014

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