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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie;
/**
* Provides an {@link EventCollection} instance.
*/
class EventCollectionProvider
{
/**
* @var callable {@link EventCollection} provider
*/
static private $provider;
/**
* Alias for {@link define()}
*
* @deprecated
*/
static public function using(callable $provider)
{
return self::define($provider);
}
/**
* Defines the {@link EventCollection} provider.
*
* @param callable $provider
*
* @return callable The previous provider, or `null` if none was defined.
*/
static public function define(callable $provider)
{
$previous = self::$provider;
self::$provider = $provider;
return $previous;
}
/**
* Returns the current provider.
*
* @return callable|null
*/
static public function defined()
{
return self::$provider;
}
/**
* Undefine the provider.
*/
static public function undefine()
{
self::$provider = null;
}
/**
* Returns a {@link EventCollection} instance using the provider.
*
* @return EventCollection
*/
static public function provide()
{
$provider = self::$provider;
if (!$provider)
{
throw new \LogicException("No provider is defined yet. Please define one with `EventCollectionProvider::define(\$provider)`.");
}
return $provider();
}
/**
* Alias for {@link undefine()}.
*
* @deprecated
*/
static public function clear()
{
self::undefine();
}
}