/**
* Extracts the entity relationship properties from an array of path parts.
*
* @param array $parts
* @return self
*/
private function extractRelationship(array $parts)
{
if (isset($parts[2])) {
if ('relationships' === $parts[2]) {
if (!isset($parts[3])) {
throw RestException::invalidRelationshipEndpoint($this->parsedUri['path']);
}
$this->relationship = ['type' => 'self', 'field' => $parts[3]];
} else {
$this->relationship = ['type' => 'related', 'field' => $parts[2]];
}
}
return $this;
}
