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<?php
/**
* Part of the Joomla Framework Event Package
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Event;
use InvalidArgumentException;
/**
* Default Event class.
*
* @since 1.0
*/
class Event extends AbstractEvent
{
/**
* Add an event argument, only if it is not existing.
*
* @param string $name The argument name.
* @param mixed $value The argument value.
*
* @return Event This method is chainable.
*
* @since 1.0
*/
public function addArgument($name, $value)
{
if (!isset($this->arguments[$name]))
{
$this->arguments[$name] = $value;
}
return $this;
}
/**
* Set the value of an event argument.
* If the argument already exists, it will be overridden.
*
* @param string $name The argument name.
* @param mixed $value The argument value.
*
* @return Event This method is chainable.
*
* @since 1.0
*/
public function setArgument($name, $value)
{
$this->arguments[$name] = $value;
return $this;
}
/**
* Remove an event argument.
*
* @param string $name The argument name.
*
* @return mixed The old argument value or null if it is not existing.
*
* @since 1.0
*/
public function removeArgument($name)
{
$return = null;
if (isset($this->arguments[$name]))
{
$return = $this->arguments[$name];
unset($this->arguments[$name]);
}
return $return;
}
/**
* Clear all event arguments.
*
* @return array The old arguments.
*
* @since 1.0
*/
public function clearArguments()
{
$arguments = $this->arguments;
$this->arguments = array();
return $arguments;
}
/**
* Stop the event propagation.
*
* @return void
*
* @since 1.0
*/
public function stop()
{
$this->stopped = true;
}
/**
* Set the value of an event argument.
*
* @param string $name The argument name.
* @param mixed $value The argument value.
*
* @return void
*
* @throws InvalidArgumentException If the argument name is null.
*
* @since 1.0
*/
public function offsetSet($name, $value)
{
if (is_null($name))
{
throw new InvalidArgumentException('The argument name cannot be null.');
}
$this->setArgument($name, $value);
}
/**
* Remove an event argument.
*
* @param string $name The argument name.
*
* @return void
*
* @since 1.0
*/
public function offsetUnset($name)
{
$this->removeArgument($name);
}
}