/**
  * @return string
  * @throws sfError404Exception
  */
 public function executeGet()
 {
     /** @var myWebRequest $request **/
     $request = $this->getRequest();
     $redir = $this->getRequestParameter('redir', false);
     $uri = $this->getRequestParameter('uri');
     if (!$uri) {
         $uri = "http://" . $request->getPathInfoParam('HTTP_HOST') . $request->getPathInfoParam('REQUEST_URI');
         //strip trailing type
         $uri = preg_replace('/\\.\\w+$/U', '', $uri);
         //strip _dev script if it's part of the URI'
         $uri = preg_replace('%\\w+\\_dev.php/%', '', $uri);
     }
     $module = $this->getRequestParameter('type');
     if ('unknown' == $module) {
         $accept = $request->getPathInfoParam('HTTP_ACCEPT');
         $agent = $request->getPathInfoParam('HTTP_USER_AGENT');
         //any of these will return html
         /*RewriteCond %{HTTP_ACCEPT} !application/rdf\+xml.*(text/html|application/xhtml\+xml)
             RewriteCond %{HTTP_ACCEPT} text/html [OR]
             RewriteCond %{HTTP_ACCEPT} application/xhtml\+xml [OR]
             RewriteCond %{HTTP_USER_AGENT} ^Mozilla/.*
             RewriteRule ^(.*)$ rdtest.php?type=html&uri=$1 [QSA,L]
           */
         if (!preg_match('%application/rdf\\+xml.*(text/html|application/xhtml\\+xml)%im', $accept) && (preg_match('%text/html%im', $accept) || preg_match('%application/xhtml\\+xml%im', $accept) || preg_match('%^Mozilla/.*%im', $agent) && preg_match('%\\*/\\*%im', $accept))) {
             $module = 'html';
         } elseif (preg_match('%application/rdf\\+xml%im', $accept)) {
             $module = 'rdf';
         } elseif (preg_match('%text/rdf+n3%im', $accept)) {
             $module = 'n3';
         } else {
             $module = sfConfig::get('default_conneg_type');
         }
     }
     $class = strtolower($this->getRequestParameter('class'));
     switch ($class) {
         case 'concept':
             switch ($module) {
                 case 'html':
                     /** @var Concept $concept **/
                     $concept = ConceptPeer::getConceptByUri($uri);
                     $this->forward404Unless($concept);
                     $uri = $request->getUriPrefix() . "/concept/show/id/" . $concept->getId() . ".html";
                     //redirect
                     $this->redirectIf($redir, $uri, 303);
                     //return the url
                     return $this->renderText($uri);
                     //forward
                     //$request->setParameter('vocabulary_id', $vocabulary->getId());
                     //$this->forward('concept','list');
                     break;
                 case 'rdf':
                     //redirect
                     $this->redirectIf($redir, $uri . '.rdf', 303);
                     //forward
                     $request->setParameter('type', 'api_uri');
                     $this->forwardIf($uri, 'rdf', 'showConcept');
                     break;
             }
             break;
         case 'concept_scheme':
         case 'conceptscheme':
             switch ($module) {
                 case 'html':
                     /** @var Vocabulary $vocabulary **/
                     $vocabulary = VocabularyPeer::retrieveByUri($uri);
                     $this->forward404Unless($vocabulary);
                     $uri = $request->getUriPrefix() . "/vocabulary/show/id/" . $vocabulary->getId() . ".html";
                     //redirect
                     $this->redirectIf($redir, $uri, 303);
                     //return the url
                     return $this->renderText($uri);
                     //forward
                     //$request->setParameter('vocabulary_id', $vocabulary->getId());
                     //$this->forward('concept','list');
                     break;
                 case 'rdf':
                     //redirect
                     $this->redirectIf($redir, $uri . '.rdf', 303);
                     //forward
                     $request->setParameter('type', 'api_uri');
                     $this->forwardIf($uri, 'rdf', 'showScheme');
                     break;
                 case 'xsd':
                     //reset the type
                     $request->setParameter('type', 'api_uri');
                     $this->forwardIf($uri, 'xml', 'showScheme');
                     break;
             }
             break;
         case 'schema':
             /** @var Schema $schema **/
             $schema = SchemaPeer::retrieveByUri($uri);
             $this->forward404Unless($schema);
             switch ($module) {
                 case 'html':
                     $uri = $request->getUriPrefix() . "/schema/show/id/" . $schema->getId() . ".html";
                     //redirect
                     $this->redirectIf($redir, $uri, 303);
                     //return the url
                     return $this->renderText($uri);
                     break;
                 case 'rdf':
                     //redirect
                     $this->redirectIf($redir, $uri . '.rdf', 303);
                     //forward
                     $request->setParameter('id', $schema->getId());
                     $this->forwardIf($uri, 'schema', 'showRdf');
                     break;
             }
             break;
         case 'schema_property':
         case 'schemaproperty':
             /** @var SchemaProperty $property **/
             $property = SchemaPropertyPeer::retrieveByUri($uri);
             $this->forward404Unless($property);
             switch ($module) {
                 case 'html':
                     $uri = $request->getUriPrefix() . "/schemaprop/show/id/" . $property->getId() . ".html";
                     //redirect
                     $this->redirectIf($redir, $uri, 303);
                     //return the url
                     return $this->renderText($uri);
                     break;
                 case 'rdf':
                     //redirect
                     $this->redirectIf($redir, $uri . '.rdf', 303);
                     //forward
                     $request->setParameter('id', $property->getId());
                     $this->forwardIf($uri, 'schemaprop', 'showRdf');
                     break;
             }
             break;
         default:
             $this->forward404();
     }
     return sfView::NONE;
 }