public function truncate() {
		//connect to database
		$this->mapper->connect();
	
		//begin transaction
		$this->mapper->beginTransaction();
	
		//build query
		$query = $this->mapper->newQuery()
		->deleteFrom($this->entityProfile->getEntityTable());
			
		//run query
		$result = $query->exec();
	
		//commit
		$this->mapper->commit();
		return $result;
	}