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<?php
/* Icinga Web 2 | (c) 2015 Icinga Development Team | GPLv2+ */
namespace Icinga\Data\Tree;
use ArrayIterator;
use RecursiveIterator;
/**
* Iterator over a tree node's children
*/
class TreeNodeIterator implements RecursiveIterator
{
/**
* The node's children
*
* @var ArrayIterator
*/
protected $children;
/**
* Create a new iterator over a tree node's children
*
* @param TreeNode $node
*/
public function __construct(TreeNode $node)
{
$this->children = new ArrayIterator($node->getChildren());
}
public function current(): TreeNode
{
return $this->children->current();
}
public function key(): int
{
return $this->children->key();
}
public function next(): void
{
$this->children->next();
}
public function rewind(): void
{
$this->children->rewind();
}
public function valid(): bool
{
return $this->children->valid();
}
public function hasChildren(): bool
{
return $this->current()->hasChildren();
}
public function getChildren(): TreeNodeIterator
{
return new static($this->current());
}
/**
* Get whether the iterator is empty
*
* @return bool
*/
public function isEmpty()
{
return ! $this->children->count();
}
}
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