Custom component, loses attribute value?

[Robert Campbell]

Hello,

I have a custom component - a class extending UIComponentTag, a class extending UIComponentBase, and a class extending Renderer. The entire control works as it should, that is until I hit refresh. Upon a refresh, my UIComponentBase class getter functions suddenly return nulls. For instance, my tag can look like this:

<myapp:sometag myatt="somevalue"></myapp:sometag>

And when the page containing this is first loaded, in my renderer I have:

String someValue = ((UIPermissions) component).getSomeValue();

This works flawlessly the first time the page loads, but getSomeValue() returns null upon refresh. Any ideas? Thanks everyone... code is listed below.


public class PermissionsTag extends UIComponentTag {

    public static final String COMPONENT_TYPE = "com.comp.UIPermissions";
    public static final String COMPONENT_RENDERER = "com.comp.PermissionsRenderer";       
   
    private String sectionName;
   
    public String getComponentType() {
        return (COMPONENT_TYPE);
    }

    public String getRendererType() {
        return (COMPONENT_RENDERER);
    }

    /**
    * @jsp.attribute name="sectionName" required="true" rtexprvalue="false" type="java.lang.String"
    */
    public void setSectionName(String sectionName) {
        this.sectionName = sectionName;
    }

    protected void setProperties(UIComponent component) {
        super.setProperties(component);
       
        if (sectionName != null) {
            ((UIPermissions) component).setSectionName(sectionName);
        }       
    }
}



 public class UIPermissions extends UIComponentBase {
    protected final Log log = LogFactory.getLog(UIPermissions.class);
   
    public static final String COMPONENT_FAMILY = "UIPermissions";
   
    private String sectionName;
   
    public UIPermissions() {
        super();
    }
   
    public String getFamily() {
        return COMPONENT_FAMILY;
    }

    public String getSectionName() {
        return sectionName;
    }

    public void setSectionName(String sectionName) {
        this.sectionName = sectionName;
    }   
}




 public class PermissionsRenderer extends Renderer {
    protected final Log log = LogFactory.getLog(PermissionsRenderer.class);
   
    public boolean getRendersChildren() {
        return true;
    }
   
    public void encodeChildren(FacesContext context, UIComponent component) throws IOException {

        String sectionName = ((UIPermissions) component).getSectionName();
        User user = (User) ((UsernamePasswordAuthenticationToken) context.getExternalContext().getUserPrincipal()).getPrincipal();
               
        log.info("Section Name:");
        log.info(sectionName);       
               
        if (user.getUsername().equals(sectionName)) {
            for (Iterator iter = component.getChildren ().iterator(); iter.hasNext();) {
                UIComponent child = (UIComponent) iter.next();
                encodeRecursive(context, child);
            }
        }
    }   
   
    protected void encodeRecursive(FacesContext context, UIComponent component)
            throws IOException {
        if (!component.isRendered())
            return;

        component.encodeBegin(context);
        if (component.getRendersChildren()) {
            component.encodeChildren (context);
        } else {
            List children = component.getChildren();
            for (Iterator iter = children.iterator(); iter.hasNext();) {
                UIComponent child = (UIComponent) iter.next ();
                encodeRecursive(context, child);
            }
        }
        component.encodeEnd(context);
    }   
}