public int doEndTag() throws JspException 
{
        component.end(pageContext.getOut(), getBody());
        component = null;
        return EVAL_PAGE;
}

 public int doStartTag() throws JspException 
{
        component = getBean(getStack(), (HttpServletRequest) pageContext.getRequest(), (HttpServletResponse) pageContext.getResponse());
        Container container = Dispatcher.getInstance().getContainer();
        container.inject(component);
        populateParams();
        boolean evalBody = component.start(pageContext.getOut());
        if (evalBody) {
            return component.usesBody() ? EVAL_BODY_BUFFERED : EVAL_BODY_INCLUDE;
        } else {
            return SKIP_BODY;
        }
}

 abstract public Component getBean(ValueStack stack,
    HttpServletRequest req,
    HttpServletResponse res)

 public Component getComponent() 
{
        return component;
}

 protected  void populateParams() 
{

}