| 141,14 → 141,38 |
|---|
| } |
| |
| public function one_up() { |
| // TODO |
| return false; |
| $oid = $this->doi; |
| |
| $p = strrpos($oid, '/'); |
| if ($p === false) return $oid; |
| if ($p == 0) return '/'; |
| |
| $oid_up = substr($oid, 0, $p); |
| |
| return self::parse(self::ns().':'.$oid_up); |
| } |
| |
| public function distance($to) { |
| // TODO |
| return null; |
| if (!is_object($to)) $to = OIDplusObject::parse($to); |
| if (!($to instanceof $this)) return false; |
| |
| $a = $to->doi; |
| $b = $this->doi; |
| |
| if (substr($a,0,1) == '/') $a = substr($a,1); |
| if (substr($b,0,1) == '/') $b = substr($b,1); |
| |
| $ary = explode('/', $a); |
| $bry = explode('/', $b); |
| |
| $min_len = min(count($ary), count($bry)); |
| |
| for ($i=0; $i<$min_len; $i++) { |
| if ($ary[$i] != $bry[$i]) return false; |
| } |
| |
| return count($ary) - count($bry); |
| } |
| } |
| |
| OIDplusObject::$registeredObjectTypes[] = 'OIDplusDoi'; |