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    <p>First, you need to have a backing component which implements <a href="http://docs.oracle.com/javaee/6/api/javax/faces/component/NamingContainer.html" rel="nofollow noreferrer"><code>NamingContainer</code></a> and returns <code>"javax.faces.NamingContainer"</code> as component family. This is required by composite components, you can't change that part. The <a href="http://docs.oracle.com/javaee/6/api/javax/faces/component/UINamingContainer.html" rel="nofollow noreferrer"><code>UINamingContainer</code></a> implementation already does that, so if you can just extend from it. </p> <pre><code>@FacesComponent("mySelectOneRadio") public class MySelectOneRadio extends UINamingContainer { // ... } </code></pre> <p>Or if you rather want to extend from <code>UISelectOne</code>, then you'd have to implement the <code>NamingContainer</code> interface and make sure that you return <a href="http://docs.oracle.com/javaee/6/api/javax/faces/component/UINamingContainer.html#COMPONENT_FAMILY" rel="nofollow noreferrer"><code>UINamingContainer.COMPONENT_FAMILY</code></a> in the <code>getFamily()</code> override.</p> <p>Then, you need to specify it in <code>&lt;cc:interface componentType&gt;</code>.</p> <pre><code>&lt;cc:interface componentType="mySelectOneRadio"&gt; </code></pre> <hr> <p>Note that at this step you can already perform the rendering (encoding) through Java. Just override the <code>encodeChildren()</code> method.</p> <pre><code>@FacesComponent("mySelectOneRadio") public class MySelectOneRadio extends UINamingContainer { @Override public void encodeChildren(FacesContext context) throws IOException { ResponseWriter writer = context.getResponseWriter(); writer.startElement("div", this); writer.writeText("hello world", null); writer.endElement("div"); } } </code></pre> <hr> <p>Coming back to your concrete question, you'd thus like to have a standalone <code>Renderer</code> class for this. That's fine. For that you need to extend <code>Renderer</code>:</p> <pre><code>@FacesRenderer(componentFamily=UINamingContainer.COMPONENT_FAMILY, rendererType=MySelectOneRadioRenderer.RENDERER_TYPE) public class MySelectOneRadioRenderer extends Renderer { public static final String RENDERER_TYPE = "com.example.MySelectOneRadio"; @Override public void encodeChildren(FacesContext context, UIComponent component) throws IOException { ResponseWriter writer = context.getResponseWriter(); writer.startElement("div", component); writer.writeText("hello world", null); writer.endElement("div"); } } </code></pre> <p>The backing component should be changed as follows in order to properly register this renderer as the default renderer (don't override <code>getRendererType()</code> method! otherwise you or anyone else would be unable to change this by <code>&lt;renderer&gt;</code> in <code>faces-config.xml</code>):</p> <pre><code>@FacesComponent("myComposite") public class MyComposite extends UINamingContainer { public MyComposite() { // Set default renderer. setRendererType(MySelectOneRadioRenderer.RENDERER_TYPE); } } </code></pre> <p>Note that thanks to the <code>@FacesRenderer</code>, you don't need to hassle with <code>faces-config.xml</code>.</p> <hr> <p>Whatever way you choose to encode the children, you can get component's children just by <code>UIComponent#getChildren()</code>. When you're inside <code>MySelectOneRadio</code> component:</p> <pre><code>if (getChildCount() &gt; 0) { for (UICompnent child : getChildren()) { // ... } } </code></pre> <p>Or when you're inside <code>MySelectOneRadioRenderer</code> renderer:</p> <pre><code>if (component.getChildCount() &gt; 0) { for (UICompnent child : component.getChildren()) { // ... } } </code></pre> <p>To delegate to the component's own default rendering, invoke <code>super.encodeChildren()</code> or <code>component.encodeChildren()</code>. To delegate to child's own default rendering, invoke <code>child.encodeAll()</code>.</p> <h3>See also:</h3> <ul> <li><a href="https://stackoverflow.com/questions/8076625/jsf-what-is-the-relationship-between-component-family-component-type-and-rend">What is the relationship between component family, component type and renderer type?</a></li> </ul>
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    1. COHello @BalusC, your answer was very useful, also I would like to know how do I pass the value of the selected `<selectItem />` to a controller when the user clicks on a `<h:commandButton />`
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