splobjectstorage.inc

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<?php

class SplObjectStorage implements Iterator, Countable
{
    private $storage = array();
    private $index = 0;

    function rewind()
    {
        rewind($this->storage);
    }
    
    function valid()
    {
        return key($this->storage) !== false;
    }
    
    function key()
    {
        return $this->index;
    }
    
    function current()
    {
        return current($this->storage);
    }
    
    function next()
    {
        next($this->storage);
        $this->index++;
    }

    function count()
    {
        return count($this->storage);
    }

    function contains($obj)
    {
        if (is_object($obj))
        {
            foreach($this->storage as $object)
            {
                if ($object === $obj)
                {
                    return true;
                }
            }
        }
        return false;
    }

    function attach($obj)
    {
        if (is_object($obj) && !$this->contains($obj))
        {
            $this->storage[] = $obj;
        }
    }

    function detach($obj)
    {
        if (is_object($obj))
        {
            foreach($this->storage as $idx => $object)
            {
                if ($object === $obj)
                {
                    unset($this->storage[$idx]);
                    $this->rewind();
                    return;
                }
            }
        }
    }
}

?>

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