protected PsmMethodAction(Class c, String m, Class[] argArray) { // This prevents IllegalAccessExceptions when attempting to // invoke methods on a class that is in another package and not // defined 'public'. if (!Modifier.isPublic(c.getModifiers())) { throw new IllegalPsmMethodActionException("Action class must be public."); } try { method = c.getMethod(m, argArray); } catch (NoSuchMethodException ex) { throw new IllegalPsmMethodActionException(ex.toString() + ": method " + m); } // Check each exception this method declares thrown. If it declares // exceptions, and any of them are not runtime exceptions, abort. Class[] exceptionTypes = method.getExceptionTypes(); for (int i = 0; i < exceptionTypes.length; i++) { Class exceptionClass = exceptionTypes[i]; if (!RuntimeException.class.isAssignableFrom(exceptionClass)) { throw new IllegalPsmMethodActionException( "Method must not declare non-Runtime " + "exceptions."); } } // Ensure that the method returns PsmEvent if (PsmEvent.class != method.getReturnType()) { throw new IllegalPsmMethodActionException("Method return type must be PsmEvent"); } // Ensure that both the method is both public and static. if (!Modifier.isStatic(method.getModifiers()) || !Modifier.isPublic(method.getModifiers())) { throw new IllegalPsmMethodActionException("Method " + m + " must be static and public."); } }