/**
  * Show a representation of a digital object image.
  *
  * @param sfWebRequest $request
  *
  */
 public function execute($request)
 {
     // Get representation by usage type
     $this->representation = $this->resource->getRepresentationByUsage($this->usageType);
     // If we can't find a representation for this object, try their parent
     if (!$this->representation && ($parent = $this->resource->parent)) {
         $this->representation = $parent->getRepresentationByUsage($this->usageType);
     }
     // Set up display of video in flowplayer
     if ($this->representation) {
         $this->response->addJavaScript('/vendor/flowplayer/example/flowplayer-3.1.4.min.js');
         $this->response->addJavaScript('flowplayer');
         // If this is a reference movie, get the thumbnail representation for the
         // place holder image
         $this->showFlashPlayer = true;
         if (QubitTerm::REFERENCE_ID == $this->usageType) {
             $this->thumbnail = $this->resource->getRepresentationByUsage(QubitTerm::THUMBNAIL_ID);
         }
         list($this->width, $this->height) = QubitDigitalObject::getImageMaxDimensions($this->usageType);
         // For javascript_tag()
         $this->representationFullPath = public_path($this->representation->getFullPath());
     } else {
         $this->showFlashPlayer = false;
         $this->representation = QubitDigitalObject::getGenericRepresentation($this->resource->mimeType, $this->usageType);
     }
 }