/**
  * @param Asset $asset
  * @param MetaDataCollection $metaDataCollection
  */
 public function mapMetaData(Asset $asset, MetaDataCollection $metaDataCollection)
 {
     $contextVariables = array_merge($this->defaultContextVariables, $metaDataCollection->toArray());
     if (isset($this->metaDataMappingConfiguration['title'])) {
         $asset->setTitle(substr((string) EelUtility::evaluateEelExpression($this->metaDataMappingConfiguration['title'], $this->eelEvaluator, $contextVariables), 0, 255));
     }
     if (isset($this->metaDataMappingConfiguration['caption'])) {
         $asset->setCaption((string) EelUtility::evaluateEelExpression($this->metaDataMappingConfiguration['caption'], $this->eelEvaluator, $contextVariables));
     }
     if (isset($this->metaDataMappingConfiguration['tags'])) {
         $tagLabels = EelUtility::evaluateEelExpression($this->metaDataMappingConfiguration['tags'], $this->eelEvaluator, $contextVariables);
         $tagLabels = array_unique($tagLabels);
         $tags = new ArrayCollection();
         foreach ($tagLabels as $tagLabel) {
             if (trim($tagLabel) !== '') {
                 $tags->add($this->getOrCreateTag(trim($tagLabel)));
             }
         }
         $asset->setTags($tags);
     }
     if (isset($this->metaDataMappingConfiguration['collections'])) {
         $collectionTitles = EelUtility::evaluateEelExpression($this->metaDataMappingConfiguration['collections'], $this->eelEvaluator, $contextVariables);
         $collectionTitles = array_unique($collectionTitles);
         $collections = new ArrayCollection();
         foreach ($collectionTitles as $collectionTitle) {
             if (trim($collectionTitle) !== '') {
                 $collections->add($this->getOrCreateCollection(trim($collectionTitle)));
             }
         }
         $asset->setAssetCollections($collections);
     }
     if (!$this->persistenceManager->isNewObject($asset)) {
         $this->assetRepository->update($asset);
     }
 }