/**
* Compares this UUID with the specified UUID.
*
* The first of two UUIDs is greater than the second if the most
* significant field in which the UUIDs differ is greater for the first
* UUID.
*
* Q. What's the value of being able to sort UUIDs?<br>
* A. Use them as keys in a B-Tree or similar mapping.
*
* @param Uuid $uuid UUID to which this UUID is to be compared
* @return int -1, 0 or 1 as this UUID is less than, equal to, or greater than $uuid
*/
public function compareTo(Uuid $uuid)
{
$comparison = null;
if ($this->getMostSignificantBitsHex() < $uuid->getMostSignificantBitsHex()) {
$comparison = -1;
} elseif ($this->getMostSignificantBitsHex() > $uuid->getMostSignificantBitsHex()) {
$comparison = 1;
} elseif ($this->getLeastSignificantBitsHex() < $uuid->getLeastSignificantBitsHex()) {
$comparison = -1;
} elseif ($this->getLeastSignificantBitsHex() > $uuid->getLeastSignificantBitsHex()) {
$comparison = 1;
} else {
$comparison = 0;
}
return $comparison;
}
