Scalar::getValue

public function getValue($key, $item, array $parameters = array())
{
	if($item->containsKey($key))
	{
		return $item->offsetGetDirect($key);
	}

	$value = null;

	if(!$item->getId())
	{
		// this is a new entity, and no value in cache, so get the default one (read "just like from database")
		$value = $this->getDefaultValue($key, $item);
	}
	else
	{
		$value = $this->readValueFromDatabase($key, $item);
	}

	// cache this field, if can
	if($this->isCacheable())
	{
		$item->offsetSetDirect($key, $value);
	}

	return $value;
}