* evaluates the member variable <code>portletId</code> and saves the
* evaluated result to <code>evaluatedPortletId</code>
* @throws JspException if an error occurs.
*/
private void evaluatePortletId() throws JspException {
ExpressionEvaluatorProxy proxy = ExpressionEvaluatorProxy.getProxy();
Object obj = proxy.evaluate(portletId, pageContext);
if (LOG.isDebugEnabled()) {
LOG.debug("Evaluated portletId to: " + obj);
}
evaluatedPortletId = (String) obj;
}