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<?php
/**
* @brief Singleton Pattern
* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
* @copyright (c) Invision Power Services, Inc.
* @license https://www.invisioncommunity.com/legal/standards/
* @package Invision Community
* @since 18 Feb 2013
*/
namespace IPSUtf8\Patterns;
/**
* Singleton Pattern
*/
class Singleton implements \Iterator
{
/**
* Get instance
*
* @return \IPS\Request
*/
public static function i()
{
if( static::$instance === NULL )
{
$classname = \get_called_class();
static::$instance = new $classname;
}
return static::$instance;
}
/**
* @brief Data Store
*/
protected $data = array();
/**
* Magic Method: Get
*
* @param mixed $key Key
* @return mixed Value from the datastore
*/
public function __get( $key )
{
if( !isset( $this->data[ $key ] ) )
{
return NULL;
}
return $this->data[ $key ];
}
/**
* Magic Method: Set
*
* @param mixed $key Key
* @param mixed $value Value
* @return void
*/
public function __set( $key, $value )
{
$this->data[ $key ] = $value;
}
/**
* Magic Method: Isset
*
* @param mixed $key Key
* @return bool
*/
public function __isset( $key )
{
return isset( $this->data[ $key ] );
}
/**
* Iterator: Rewind
*
* @return void
*/
function rewind()
{
reset( $this->data );
}
/**
* Iterator: Current
*
* @return mixed
*/
function current()
{
return current( $this->data );
}
/**
* Iterator: Key
*
* @return mixed
*/
function key()
{
return key( $this->data );
}
/**
* Iterator: Next
*
* @return void
*/
function next()
{
next( $this->data );
}
/**
* Iterator: Valid
*
* @return bool
*/
function valid()
{
return key( $this->data ) !== null;
}
}