MethodMetaData m = (MethodMetaData) iterator.next();
 if (m.patternMatches(methodName, params, iface))
 {
 /* If this is an unchecked method anyone can access it so
 set the result set to a role that equates to any Principal or
 Principal name and return.
 */
 if (m.isUnchecked())
 {
 result.clear();
 result.add(AnybodyPrincipal.ANYBODY_PRINCIPAL);
 break;
 }
 // Else, add all roles
 else
 {
 Iterator rolesIterator = m.getRoles().iterator();
 while (rolesIterator.hasNext())
 {
 String roleName = (String) rolesIterator.next();
 result.add(new SimplePrincipal(roleName));
 }
 }
 }
 }

 // If no permissions were assigned to the method return null to indicate no access
 if( result.isEmpty() )
 {
 result = null;
 }