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* @license GNU General Public License version 2 or later; see LICENSE */ namespace Joomla\CMS\Event; \defined('JPATH_PLATFORM') or die; use BadMethodCallException; /** * This class implements the immutable base Event object used system-wide to offer orthogonality. * * @see \Joomla\CMS\Event\AbstractEvent * @since 4.0.0 */ class AbstractImmutableEvent extends AbstractEvent { /** * A flag to see if the constructor has been already called. * * @var boolean * @since 4.0.0 */ private $constructed = false; /** * Constructor. * * @param string $name The event name. * @param array $arguments The event arguments. * * @since 4.0.0 * @throws BadMethodCallException */ public function __construct(string $name, array $arguments = []) { if ($this->constructed) { throw new BadMethodCallException( sprintf('Cannot reconstruct the AbstractImmutableEvent %s.', $this->name) ); } $this->constructed = true; parent::__construct($name, $arguments); } /** * Set the value of an event argument. * * @param string $name The argument name. * @param mixed $value The argument value. * * @return void * * @since 4.0.0 * @throws BadMethodCallException */ public function offsetSet($name, $value) { throw new BadMethodCallException( sprintf( 'Cannot set the argument %s of the immutable event %s.', $name, $this->name ) ); } /** * Remove an event argument. * * @param string $name The argument name. * * @return void * * @since 4.0.0 * @throws BadMethodCallException */ public function offsetUnset($name) { throw new BadMethodCallException( sprintf( 'Cannot remove the argument %s of the immutable event %s.', $name, $this->name ) ); } }