/**
* The iterator's class constructor.
* @access public
* @param BinaryNode $subjectNode The node to browse.
* @param int $method The browsing method.
*/
public function __construct(AbstractNode $subjectNode, $method = self::PRE_ORDER)
{
if ($subjectNode instanceof BinaryNode) {
$this->_method = $method;
parent::__construct($subjectNode);
} else {
throw new \RuntimeException("BinaryIterator needs an instance of BinaryNode or of its subclasses as subject.");
}
}
/**
* Get an iterator for the current node.
* @return NodeIterator
*/
public function iterator()
{
$result = new NodeIterator($this);
return $result->items();
}
