How to throw 404 exceptions in Zend Framework

[KseniyaK]

I'm trying to use the Zend_Controller_Plugin_ErrorHandler to handle my error 404 cases. According to the doc, the plugin has constants that one can use to match Exception types and handle them accordingly. e.g.\[code\]switch ($errors->type) { case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ROUTE: case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_CONTROLLER: case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ACTION: // 404 error -- controller or action not found\[/code\]Does anyone know how to create exceptions of these types specifically?