public TabChangeListenerTag() 
{

}

 public int doStartTag() throws JspException 
{
        if (type == null)
        {
            throw new JspException("type attribute not set");
        }
        //Find parent UIComponentTag
        UIComponentTag componentTag = UIComponentTag.getParentUIComponentTag(pageContext);
        if (componentTag == null)
        {
            throw new JspException("TabChangeListenerTag has no UIComponentTag ancestor");
        }
        if (componentTag.getCreated())
        {
            //Component was just created, so we add the Listener
            UIComponent component = componentTag.getComponentInstance();
            if (component instanceof HtmlPanelTabbedPane)
            {
                Object listenerRef = type;
                if (UIComponentTag.isValueReference(type))
                {
                    FacesContext facesContext = FacesContext.getCurrentInstance();
                    ValueBinding valueBinding = facesContext.getApplication().createValueBinding(type);
                    listenerRef = valueBinding.getValue(facesContext);
                }
                if(listenerRef instanceof String)
                {
                    String className = (String) listenerRef;
                    TabChangeListener listener = (TabChangeListener) ClassUtils.newInstance(className);
                    ((HtmlPanelTabbedPane) component).addTabChangeListener(listener);
                }
                else if(listenerRef instanceof TabChangeListener)
                {
                    TabChangeListener listener = (TabChangeListener) listenerRef;
                    ((HtmlPanelTabbedPane) component).addTabChangeListener(listener);
                }
                else
                    throw new JspException("type is neither a 'String' nor a value-binding to a 'String' or a 'TabChangeListener' instance.");
            }
            else
            {
                throw new JspException("Component " + component.getId() + " is no HtmlPanelTabbedPane");
            }
        }
        return Tag.SKIP_BODY;
}

 public  void setType(String type) 
{
        this.type = type;
}