/**
  * @param ClassMetadata $classMetadata
  * @param array $mapping
  */
 private function remapAssociation(ClassMetadata $classMetadata, array $mapping)
 {
     $newMapping = $this->resolveTargetDocuments[$mapping['targetDocument']];
     $newMapping = array_replace_recursive($mapping, $newMapping);
     $newMapping['fieldName'] = $mapping['fieldName'];
     // clear reference case of duplicate exception
     unset($classMetadata->fieldMappings[$mapping['fieldName']]);
     unset($classMetadata->associationMappings[$mapping['fieldName']]);
     switch ($mapping['association']) {
         case ClassMetadata::REFERENCE_ONE:
             $classMetadata->mapOneReference($newMapping);
             break;
         case ClassMetadata::REFERENCE_MANY:
             $classMetadata->mapManyReference($newMapping);
             break;
         case ClassMetadata::EMBED_ONE:
             $classMetadata->mapOneEmbedded($newMapping);
             break;
         case ClassMetadata::EMBED_MANY:
             $classMetadata->mapManyEmbedded($newMapping);
             break;
     }
 }