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<?php |
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/** |
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* this file is part of magerun |
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* |
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* @author Tom Klingenberg <https://github.com/ktomk> |
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*/ |
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namespace N98\Util; |
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/** |
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* Autloader with self-registration, de-registration, muting and implementation switching |
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* |
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* @package N98\Util |
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*/ |
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final class AutoloadHandler |
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{ |
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/** |
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* Throw exception if the autoload implementation is not callable (default). If no exception is thrown, |
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* autoload callback is just ignored |
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*/ |
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const NO_EXCEPTION = 1; |
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/** |
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* |
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*/ |
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const NO_AUTO_REGISTER = 2; |
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/** |
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* @var integer |
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*/ |
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private $flags; |
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private $callback; |
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private $splRegistered; |
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/** |
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* @var bool |
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*/ |
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private $enabled; |
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/** |
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* @param $callback |
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* @param integer $flags [optional] |
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* @return AutoloadHandler |
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*/ |
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public static function create($callback, $flags = null) |
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{ |
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return new self($callback, $flags); |
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} |
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/** |
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* AutoloadHandler constructor. |
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* |
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* @param $callback |
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* @param integer $flags [optional] |
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*/ |
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public function __construct($callback, $flags = null) |
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{ |
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if (null === $flags) { |
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$flags = 0; |
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} |
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$this->flags = $flags; |
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$this->enabled = true; |
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$this->callback = $callback; |
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$this->flags & self::NO_AUTO_REGISTER || $this->register(); |
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} |
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public function register() |
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{ |
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spl_autoload_register($this); |
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$this->splRegistered = true; |
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} |
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public function unregister() |
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{ |
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spl_autoload_unregister($this); |
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$this->splRegistered = false; |
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} |
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public function __invoke($className) |
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{ |
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if (!$this->splRegistered) { |
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return false; |
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} |
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if (!$this->enabled) { |
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return false; |
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} |
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if (!is_callable($this->callback)) { |
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if ($this->flags & self::NO_EXCEPTION) { |
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return false; |
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} |
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throw new \BadMethodCallException('Autoload callback is not callable'); |
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} |
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return call_user_func($this->callback, $className); |
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} |
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public function getCleanupCallback() |
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{ |
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$self = (object) array('ref' => $this); |
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return function () use ($self) { |
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if (isset($self->ref)) { |
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$self->ref->reset(); |
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unset($self->ref); |
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} |
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}; |
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} |
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/** |
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* Unregister from SPL Stack and destroy callback reference. |
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*/ |
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public function reset() |
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{ |
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$this->unregister(); |
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$this->callback = null; |
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} |
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/** |
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* @return boolean |
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*/ |
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public function isEnabled() |
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{ |
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return $this->enabled; |
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} |
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/** |
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* @param boolean $flagEnabled |
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*/ |
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public function setEnabled($flagEnabled) |
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{ |
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$this->enabled = (bool) $flagEnabled; |
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} |
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public function disable() |
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{ |
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$this->enabled = false; |
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} |
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public function enable() |
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{ |
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$this->enabled = true; |
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} |
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/** |
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* @param mixed $callback |
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*/ |
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public function setCallback($callback) |
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{ |
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$this->callback = $callback; |
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} |
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} |
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netz98 /
n98-magerun
