4 Replies Latest reply on Nov 11, 2008 5:58 AM by Alexander Seitz

    Exceptions when dynamically create RichFaces component in Se

    Jack Yeh Newbie

      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:

      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.

      As I know, the HtmlPanel object that I construct does derived from the org.richfaces.component.UIPanel class. Moreover, I tried to test the 'layout' argument that passed into the setLayout method by the (layout instanceof HtmlPanel) statement, it returns false.

      So, I really have no idea what's going on here, neither how this exception occurs. 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.