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AbstractIterator.php
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AbstractIterator.php
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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @package Zend_Permissions
*/
namespace Zend\Permissions\Rbac;
use RecursiveIterator;
/**
* @category Zend
* @package Zend_Permissions
* @subpackage Rbac
*/
abstract class AbstractIterator implements RecursiveIterator
{
protected $index = 0;
protected $children = array();
/**
* (PHP 5 >= 5.0.0)<br/>
* Return the current element
* @link http://php.net/manual/en/iterator.current.php
* @return mixed Can return any type.
*/
public function current()
{
return $this->children[$this->index];
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Move forward to next element
* @link http://php.net/manual/en/iterator.next.php
* @return void Any returned value is ignored.
*/
public function next()
{
$this->index++;
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Return the key of the current element
* @link http://php.net/manual/en/iterator.key.php
* @return scalar scalar on success, or null on failure.
*/
public function key()
{
return $this->index;
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Checks if current position is valid
* @link http://php.net/manual/en/iterator.valid.php
* @return boolean The return value will be casted to boolean and then evaluated.
* Returns true on success or false on failure.
*/
public function valid()
{
return isset($this->children[$this->index]);
}
/**
* (PHP 5 >= 5.0.0)<br/>
* Rewind the Iterator to the first element
* @link http://php.net/manual/en/iterator.rewind.php
* @return void Any returned value is ignored.
*/
public function rewind()
{
$this->index = 0;
}
/**
* (PHP 5 >= 5.1.0)<br/>
* Returns if an iterator can be created fot the current entry.
* @link http://php.net/manual/en/recursiveiterator.haschildren.php
* @return bool true if the current entry can be iterated over, otherwise returns false.
*/
public function hasChildren()
{
return count($this->children) > 0;
}
/**
* (PHP 5 >= 5.1.0)<br/>
* Returns an iterator for the current entry.
* @link http://php.net/manual/en/recursiveiterator.getRoles.php
* @return RecursiveIterator An iterator for the current entry.
*/
public function getChildren()
{
return $this->children[$this->index];
}
}