/**
* Compare quality factors of preferences.
*
* @param PreferenceInterface $lValue
* @param PreferenceInterface $rValue
*
* @return int -1, 0, 1 (see usort() callback for meaning)
*/
private function compareQualityFactor(PreferenceInterface $lValue, PreferenceInterface $rValue)
{
if ($rValue->getQualityFactor() < $lValue->getQualityFactor()) {
return -1;
} elseif ($rValue->getQualityFactor() > $lValue->getQualityFactor()) {
return 1;
} else {
return 0;
}
}
/**
* Returns the product of the server & client quality factors.
*
* @return float
*/
public function getQualityFactor()
{
return $this->clientPref->getQualityFactor() * $this->serverPref->getQualityFactor();
}
