/**
* {@inheritdoc}
*/
public function getPath()
{
$path = $this->name;
if (null !== $this->parent) {
$path = $this->parent->getPath() . '.' . $path;
}
return $path;
}
/**
* Append node.
*
* @param NodeInterface $child
*/
public function append(NodeInterface $child)
{
$name = $child->getName();
if (empty($name)) {
throw new InvalidArgumentException('Child node name cannot be empty.');
}
if (isset($this->children[$name])) {
throw new InvalidArgumentException(sprintf('Child node named "%s" already exists.', $name));
}
$this->children[$name] = $child;
}