code: public static String resolveSearchExpressions(String refItem) {
  		if (refItem != null) {
  			if (refItem.contains("@") || refItem.contains("*")) {
  				refItem = ExpressionResolver.getComponentIDs(FacesContext.getCurrentInstance(),
  						FacesContext.getCurrentInstance().getViewRoot(), refItem);
  			}
  		}
  		return refItem;
  	}
docs: Resolve the search expression
  @param refItem
  @return