/**
  * @see PropertyStatisticsStore::getUsageCounts
  *
  * @since 1.9
  *
  * @param array $propertyIds
  *
  * @return array
  */
 public function getUsageCounts(array $propertyIds)
 {
     if ($propertyIds === array()) {
         return array();
     }
     $propertyStatistics = $this->dbConnection->select($this->dbConnection->tablename($this->table), array('usage_count', 'p_id'), array('p_id' => $propertyIds), __METHOD__);
     $usageCounts = array();
     foreach ($propertyStatistics as $propertyStatistic) {
         assert(ctype_digit($propertyStatistic->p_id));
         assert(ctype_digit($propertyStatistic->usage_count));
         $usageCounts[(int) $propertyStatistic->p_id] = (int) $propertyStatistic->usage_count;
     }
     return $usageCounts;
 }