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<?php |
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namespace Onoi\CallbackContainer; |
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use Onoi\CallbackContainer\Exception\ServiceNotFoundException; |
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/** |
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* Convenience class to handle services isolated from an active ContainerBuilder |
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* instance. |
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* |
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* @license GNU GPL v2+ |
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* @since 2.0 |
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* |
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* @author mwjames |
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*/ |
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class ServicesManager { |
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* @var ContainerBuilder |
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*/ |
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private $containerBuilder; |
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/** |
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* @since 2.0 |
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* |
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* @param ContainerBuilder $containerBuilder |
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*/ |
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public function __construct( ContainerBuilder $containerBuilder ) { |
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$this->containerBuilder = $containerBuilder; |
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} |
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/** |
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* @since 2.0 |
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* |
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* @param string $serviceName |
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* @param mixed $service |
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* @param string|null $expectedReturnType |
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*/ |
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public function add( $serviceName, $service, $expectedReturnType = null ) { |
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if ( !is_callable( $service ) ) { |
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$service = function() use( $service ) { |
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return $service; |
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}; |
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} |
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$this->containerBuilder->registerCallback( $serviceName, $service ); |
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if ( $expectedReturnType !== null ) { |
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$this->containerBuilder->registerExpectedReturnType( $serviceName, $expectedReturnType ); |
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} |
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} |
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/** |
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* @since 2.0 |
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* |
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* @param string $serviceName |
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* |
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* @return boolean |
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*/ |
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public function has( $serviceName ) { |
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return $this->containerBuilder->isRegistered( $serviceName ); |
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} |
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/** |
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* @since 2.0 |
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* |
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* @param string $serviceName |
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* |
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* @return mixed |
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* @throws ServiceNotFoundException |
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*/ |
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public function get( $serviceName ) { |
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if ( !$this->containerBuilder->isRegistered( $serviceName ) ) { |
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throw new ServiceNotFoundException( "$serviceName is an unknown service." ); |
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} |
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$parameters = func_get_args(); |
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array_unshift( $parameters, $serviceName ); |
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return call_user_func_array( array( $this->containerBuilder, 'create' ), $parameters ); |
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} |
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/** |
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* @since 2.0 |
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* |
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* @param string $serviceName |
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*/ |
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public function remove( $serviceName ) { |
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$this->containerBuilder->deregister( $serviceName ); |
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} |
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/** |
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* @since 2.0 |
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* |
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* @param string $serviceName |
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* @param mixed $service |
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*/ |
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public function replace( $serviceName, $service ) { |
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$this->containerBuilder->registerObject( $serviceName, $service ); |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: