It seems like you code against a concrete implementation and not the interface PEIP\INF\Channel\Channel as the method command() does only exist in the following implementations of said interface: DrinkAggregator, DrinkRouter, OrderSplitter, PEIP\ABS\Pipe\EventPipe, PEIP\ABS\Router\Router, PEIP\ABS\Service\ServiceActivator, PEIP\ABS\Splitter\MessageSplitter, PEIP\ABS\Transformer\ContentTransformer, PEIP\ABS\Transformer\Transformer, PEIP\Listener\Wiretap, PEIP\Pipe\CommandPipe, PEIP\Pipe\EventPipe, PEIP\Pipe\FixedEventPipe, PEIP\Pipe\Pipe, PEIP\Pipe\SimpleEventPipe, PEIP\Service\HeaderServiceActivator, PEIP\Service\ServiceActivator, PEIP\Service\SplittingServiceActivator, PEIP\Service\StringServiceActivator.
Let’s take a look at an example:
interfaceUser{/** @return string */publicfunctiongetPassword();}classMyUserimplementsUser{publicfunctiongetPassword(){// return something}publicfunctiongetDisplayName(){// return some name.}}classAuthSystem{publicfunctionauthenticate(User$user){$this->logger->info(sprintf('Authenticating %s.',$user->getDisplayName()));// do something.}}
In the above example, the authenticate() method works fine as long as you just pass
instances of MyUser. However, if you now also want to pass a different implementation
of User which does not have a getDisplayName() method, the code will break.
classAuthSystem{publicfunctionauthenticate(User$user){if($userinstanceofMyUser){$this->logger->info(/** ... */);}// or alternativelyif(!$userinstanceofMyUser){thrownew\LogicException('$user must be an instance of MyUser, '.'other instances are not supported.');}}}
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types
inside the if block in such a case.
tidal /
PEIP
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: