public int doEndTag() throws JspException 
{
        try {
            if (isAccessAllowed()) {
                execute();
            }
        } catch (TilesException e) {
            String message = "Error executing tag: " + e.getMessage();
            LOG.error(message, e);
            throw new JspException(message, e);
        } catch (IOException io) {
            String message = "IO Error executing tag: " + io.getMessage();
            LOG.error(message, io);
            throw new JspException(message, io);
        }
        return EVAL_PAGE;
}

{@inheritDoc}

 abstract protected  void execute() throws IOException, JspException, TilesException
Executes the tag. It is called inside #doEndTag() .

 public String getRole() 
{
                                       
        return role;
}

Returns the role to check. If the user is in the specified role, the tag is taken into account; otherwise, the tag is ignored (skipped).

 protected boolean isAccessAllowed() 
{
        HttpServletRequest req = (HttpServletRequest) pageContext.getRequest();
        return (role == null || req.isUserInRole(role));
}

Checks if the user is inside the specified role.

 public  void release() 
{
        super.release();
        this.role = null;
}

{@inheritDoc}

 public  void setRole(String role) 
{
        this.role = role;
}

Sets the role to check. If the user is in the specified role, the tag is taken into account; otherwise, the tag is ignored (skipped).