/**
* Convinence function that gets the document id (handle) from models, vertex pods and strings.
* @param Document|AModel|string $model
* @throws GraphManagerException
*/
protected function getVertexId($model)
{
if ($model instanceof AModel) {
return $model->getPod()->getId();
} elseif ($model instanceof Document) {
return $model->getId();
} elseif (is_string($model)) {
return $model;
} else {
throw new GraphManagerException('$model can be either a model, a vertex pod or the id of the vertex.');
}
}
