/**
* Compares this object with the specified object for order. Returns a negative integer, zero, or a positive
* integer as this object is less than, equal to, or greater than the specified object.
*
* The implementor must ensure sgn(x.compareTo(y)) == -sgn(y.compareTo(x)) for all x and y.
*
* @param Comparable $b
* @return int
*/
public function compareTo(Comparable $b)
{
return strcmp($this->attr1, $b->getAttr1());
}
/**
* Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first
* argument is less than, equal to, or greater than the second.
*
* @param Comparable $a
* @param Comparable $b
* @return int
*/
public function compare(Comparable $a, Comparable $b)
{
return array_search($a->getAttr1(), $this->customOrder) >= array_search($b->getAttr1(), $this->customOrder) ? 1 : -1;
}