/**
* Compute the member's key into the relation members collection.
*
* @param string|OSM_Objects_Member $memberOrType
* @param string $ref The member's ref. Should be null if $memberOrType instanceof OSM_Objects_Member .
* @return string
*/
protected static function _memberKey($memberOrType, $ref = null)
{
if ($memberOrType instanceof OSM_Objects_Member) {
if (!empty($ref)) {
throw new InvalidArgumentException('$ref must be empty');
}
return $memberOrType->getType() . $memberOrType->getRef();
}
if (empty($ref)) {
throw new InvalidArgumentException('$ref must not be empty');
}
if (!self::isValidMemberType($memberOrType)) {
throw new OSM_Exception('Invalid member type "' . $memberOrType . '"');
}
return $memberOrType . $ref;
}
/**
*
* @param SimpleXMLElement $xmlObj
* @return OSM_Objects_Member
*/
public static function fromXmlObj(SimpleXMLElement $xmlObj)
{
$member = new OSM_Objects_Member((string) $xmlObj['type'], (string) $xmlObj['ref'], isset($xmlObj['role']) ? (string) $xmlObj['role'] : null);
$member->setDirty(false);
return $member;
}