/**
  * Convert a category array into a category object.
  *
  * @param array $aCategory category.
  *
  * @return Category converted object.
  */
 private static function convertToObject($aCategory)
 {
     $oCategory = new Category();
     $oCategory->setId(intval($aCategory['id']));
     $oCategory->setName($aCategory['name']);
     $oCategory->setDescription($aCategory['description']);
     $oCategory->setImage($aCategory['image']);
     return $oCategory;
 }