Can't dynamically create RichFaces component in Seam

30. Apr 2008, 06:00 America/New_York | Link Jack Yeh

I create a new EAR project into Eclipse by seam-gen with RichFaces support. Then I create a session bean which dynamically generates a HtmlOutputText and a RichFaces HtmlPanel object.

Session bean code :

import javax.faces.component.UIComponent;
import javax.faces.component.html.HtmlOutputText;
import org.richfaces.component.html.HtmlPanel;
public class HomePage {
	private UIComponent layout = null;
	public HomePage() {
	}
	public UIComponent getLayout() {
		return layout;
	}

	public void setLayout(UIComponent layout) {
		this.layout = layout;

		HtmlOutputText text = new HtmlOutputText();
		text.setId("TextComponent");
		text.setValue("TextComponent");
		layout.getChildren().add(text);

		HtmlPanel panel = new HtmlPanel();
		panel.setId("Panel");
		layout.getChildren().add(panel);
	}
}

home.xhtml

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
                      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:s="http://jboss.com/products/seam/taglib"
	xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:f="http://java.sun.com/jsf/core"
	xmlns:h="http://java.sun.com/jsf/html" xmlns:a4j="http://richfaces.org/a4j" xmlns:rich="http://richfaces.org/rich"
	template="layout/template.xhtml">

	<ui:define name="body">
		<a4j:form id="mainForm">
			<rich:panel id="mainPanel" binding="#{homePage.layout}">
				<h:outputText value="   Static text." />
			</rich:panel>
		</a4j:form>
	</ui:define>
</ui:composition>

The first problem I met was java.lang.NoClassDefFoundError: org/richfaces/component/html/HtmlPanel.

I think this exception probably indicates missing some libraries, thus I put richfaces-ui.jar into the root of the jar directory of the ear archive.

It works, but then I face to the second problem: java.lang.IllegalArgumentException: Component mainForm:Panel not instance of org.richfaces.component.UIPanel.

I tried to debug the problem, but the exception seems not causing by my code but inside of the Seam or RichFaces.

When I comment out the last line of the session bean code, the page shows up as expected with the dynamic created HtmlOutputText object.

layout.getChildren().add(panel);

I spend many days to solve this problem but still failed. I'll be very appreciate who can help me. Thank you very much in advance.