1 | <?php |
||
12 | class JobBindingCreateToQueueMapper extends BaseMapper |
||
13 | { |
||
14 | protected function mapMethod(JobBase $job) : Method |
||
18 | |||
19 | /** |
||
20 | * @param JobBindingCreateToQueue $job |
||
21 | * @return Url |
||
22 | */ |
||
23 | protected function mapUrl(JobBase $job) : Url |
||
33 | |||
34 | /** |
||
35 | * @param JobBindingCreateToQueue $job |
||
36 | * @return array |
||
37 | */ |
||
38 | protected function mapConfig(JobBase $job) : array { |
||
52 | } |
||
53 |
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 sub-classes 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 parent class: