It seems like you code against a concrete implementation and not the interface Maslosoft\Addendum\Interfaces\AnnotationInterface as the method getMeta() does only exist in the following implementations of said interface: Maslosoft\Addendum\Annotations\ConflictsAnnotation, Maslosoft\Addendum\Collections\MetaAnnotation, Maslosoft\Signals\Meta\SignalsAnnotation, Maslosoft\Signals\SignalForAnnotation, Maslosoft\Signals\SlotForAnnotation.
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.
Accessing name on the interface Maslosoft\Addendum\Interfaces\AnnotationInterface suggest that you code against a concrete implementation. How about adding an instanceof check?
If you access a property on an interface, you most likely code against a
concrete implementation of the interface.
Maslosoft /
Signals
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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: