class LAF_Delegate
{
/**
* @var mixed PHP callback
*/
protected $php_callback;
/**
* @var bool cached validity check result
*/
protected $is_valid;
/**
* Constructor.
* @param mixed Object which method will be invoked
* @param string Object method to call
*/
function __construct($object, $method = null)
{
if(is_array($object))
{
$this->php_callback = $object;
}
else
{
if(!$method)
$this->php_callback = $object;
else
$this->php_callback = array($object, $method);
}
}
/**
* Returns PHP callback
* @return mixed PHP callback
*/
function getCallback()
{
return $this->php_callback;
}
/**
* Invokes object method with $args
*/
function invoke()
{
if(!$this->isValid())
throw new LAF_Delegate_Exception("Invalid callback", array('callback' => $this->php_callback));
$args = func_get_args();
return call_user_func_array($this->php_callback, $args);
}
function invokeArray($args = array())
{
if(!$this->isValid())
throw new LAF_Delegate_Exception("Invalid callback", array('callback' => $this->php_callback));
return call_user_func_array($this->php_callback, $args);
}
function isValid()
{
if($this->is_valid !== null)
return $this->is_valid;
$this->is_valid = is_callable($this->php_callback);
return $this->is_valid;
}
static function objectify($delegate)
{
if(is_object($delegate) && $delegate instanceof LAF_Delegate)
return $delegate;
return new LAF_Delegate($delegate);
}
/**
* Invokes all delegates in a list with some args
* @param array Array of lmbDelegate objects that
* @param array Invoke arguments
*/
static function invokeAll($list, $args = array())
{
foreach($list as $item)
$item->invokeArray($args);
}
/**
* Invokes delegates in a list one by one. Stops invoking if delegate return a not null result.
* @param array Array of lmbDelegate objects
* @param array Invoke arguments
*/
static function invokeChain($list, $args = array())
{
foreach($list as $item)
{
$result = $item->invokeArray($args);
if(!is_null($result))
return $result;
}
}
}
:method())?
Или есть некий сакраментальный способ создавать инстансы классов незная имени класа?
без шаманских плясок.