Plugin Error Handler

<?php

class Core_controller_Plugin_ErrorHandler extends Zend_Controller_Plugin_ErrorHandler
{

    const EXCEPTION_ACL = 'EXCEPTION_ACL';

    protected function _handleError(Zend_Controller_Request_Abstract $request)
    {
        $frontController = Zend_Controller_Front::getInstance();
        if ($frontController->getParam('noErrorHandler')) {
            return;
        }

        $response = $this->getResponse();

        if ($this->_isInsideErrorHandlerLoop) {
            $exceptions = $response->getException();
            if (count($exceptions) > $this->_exceptionCountAtFirstEncounter) {
                // Exception thrown by error handler; tell the front controller to throw it
                $frontController->throwExceptions(true);
                throw array_pop($exceptions);
            }
        }

        // check for an exception AND allow the error handler controller the option to forward
        if (($response->isException()) && (!$this->_isInsideErrorHandlerLoop)) {
            $this->_isInsideErrorHandlerLoop = true;

            // Get exception information
            $error = new ArrayObject(array(), ArrayObject::ARRAY_AS_PROPS);
            $exceptions = $response->getException();
            $exception = $exceptions[0];
            $exceptionType = get_class($exception);
            $error->exception = $exception;
            switch ($exceptionType) {
                case 'Zend_Controller_Router_Exception':
                    if (404 == $exception->getCode()) {
                        $error->type = self::EXCEPTION_NO_ROUTE;
                    } else {
                        $error->type = self::EXCEPTION_OTHER;
                    }
                    break;
                case 'Zend_Controller_Dispatcher_Exception':
                    $error->type = self::EXCEPTION_NO_CONTROLLER;
                    break;
                case 'Zend_Controller_Action_Exception':
                    if (404 == $exception->getCode()) {
                        $error->type = self::EXCEPTION_NO_ACTION;
                    } else {
                        $error->type = self::EXCEPTION_OTHER;
                    }
                    break;
                case 'Zend_Acl_Exception':
                    $error->type = self::EXCEPTION_ACL;
                default:
                    $error->type = self::EXCEPTION_OTHER;
                    break;
            }

            // Keep a copy of the original request
            $error->request = clone $request;

            // get a count of the number of exceptions encountered
            $this->_exceptionCountAtFirstEncounter = count($exceptions);

            // Forward to the error handler
            $request->setParam('error_handler', $error)
                ->setModuleName($this->getErrorHandlerModule())
                ->setControllerName($this->getErrorHandlerController())
                ->setActionName($this->getErrorHandlerAction())
                ->setDispatched(false);
        }
    }

}