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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\EventDispatcher; /** * Event encapsulation class. * * Encapsulates events thus decoupling the observer from the subject they encapsulate. * * @author Drak <drak@zikula.org> */ class GenericEvent extends Event implements \ArrayAccess, \IteratorAggregate { /** * Event subject. * * @var mixed usually object or callable */ protected $subject; /** * Array of arguments. * * @var array */ protected $arguments; /** * Encapsulate an event with $subject and $args. * * @param mixed $subject The subject of the event, usually an object. * @param array $arguments Arguments to store in the event. */ public function __construct($subject = null, array $arguments = array()) { $this->subject = $subject; $this->arguments = $arguments; } /** * Getter for subject property. * * @return mixed $subject The observer subject. */ public function getSubject() { return $this->subject; } /** * Get argument by key. * * @param string $key Key. * * @throws \InvalidArgumentException If key is not found. * * @return mixed Contents of array key. */ public function getArgument($key) { if ($this->hasArgument($key)) { return $this->arguments[$key]; } throw new \InvalidArgumentException(sprintf('%s not found in %s', $key, $this->getName())); } /** * Add argument to event. * * @param string $key Argument name. * @param mixed $value Value. * * @return GenericEvent */ public function setArgument($key, $value) { $this->arguments[$key] = $value; return $this; } /** * Getter for all arguments. * * @return array */ public function getArguments() { return $this->arguments; } /** * Set args property. * * @param array $args Arguments. * * @return GenericEvent */ public function setArguments(array $args = array()) { $this->arguments = $args; return $this; } /** * Has argument. * * @param string $key Key of arguments array. * * @return boolean */ public function hasArgument($key) { return array_key_exists($key, $this->arguments); } /** * ArrayAccess for argument getter. * * @param string $key Array key. * * @throws \InvalidArgumentException If key does not exist in $this->args. * * @return mixed */ public function offsetGet($key) { return $this->getArgument($key); } /** * ArrayAccess for argument setter. * * @param string $key Array key to set. * @param mixed $value Value. */ public function offsetSet($key, $value) { $this->setArgument($key, $value); } /** * ArrayAccess for unset argument. * * @param string $key Array key. */ public function offsetUnset($key) { if ($this->hasArgument($key)) { unset($this->arguments[$key]); } } /** * ArrayAccess has argument. * * @param string $key Array key. * * @return boolean */ public function offsetExists($key) { return $this->hasArgument($key); } /** * IteratorAggregate for iterating over the object like an array * * @return \ArrayIterator */ public function getIterator() { return new \ArrayIterator($this->arguments); } }
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