protected ActionForward invokeActionMethod( Method method, Object arg )
        throws Exception
    {
        return invokeActionMethod( method, arg, getRequest(), getActionMapping() );
    }
protected ActionForward invokeActionMethod ( Method method , Object arg ) throws Exception { return invokeActionMethod ( method , arg , getRequest ( ) , getActionMapping ( ) ) ; }
Invoke the given action handler method, passing it an argument if appropriate.

@param method the action handler method to invoke.
@param arg the form-bean to pass; may be <code>null</code>.
@return the ActionForward returned by the action handler method.
@throws Exception if an Exception was raised in user code.