private function checkDiff(Statement $lhs, Statement $rhs)
{
$lhsSnak = $lhs->getMainSnak();
$rhsSnak = $rhs->getMainSnak();
if (!$lhsSnak instanceof PropertyValueSnak || !$rhsSnak instanceof PropertyValueSnak) {
return true;
}
$diff = abs($lhsSnak->getDataValue()->getSortKey() - $rhsSnak->getDataValue()->getSortKey());
return $diff <= $this->diff->getSortKey();
}
/**
* @see DataValueChecker::checkDataValue
*
* @param DataValue $dataValue
* @return boolean
* @throws InvalidArgumentException
*/
public function checkDataValue(DataValue $dataValue)
{
if (!$this->supportsDataValue($dataValue)) {
throw new InvalidArgumentException('Only values of the same type as the boundaries are accepted.');
}
$minKey = $this->minValue->getSortKey();
$maxKey = $this->maxValue->getSortKey();
$key = $dataValue->getSortKey();
return $minKey <= $key && $key <= $maxKey;
}
