| 1 | <?php |
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| 9 | class RecursiveSortNodeSimplifier implements NodeSimplifier { |
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| 10 | |||
| 11 | /** |
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| 12 | * @var NodeSimplifierFactory |
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| 13 | */ |
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| 14 | private $simplifierFactory; |
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| 15 | |||
| 16 | /** |
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| 17 | * @param NodeSimplifierFactory $simplifierFactory |
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| 18 | */ |
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| 19 | 5 | public function __construct(NodeSimplifierFactory $simplifierFactory) { |
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| 22 | |||
| 23 | /** |
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| 24 | * @see NodeSimplifier::isSimplifierFor |
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| 25 | */ |
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| 26 | 4 | public function isSimplifierFor(AbstractNode $node) { |
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| 29 | |||
| 30 | /** |
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| 31 | * @see NodeSimplifier::simplify |
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| 32 | * @param SortNode $node |
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| 33 | */ |
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| 34 | 2 | public function simplify(AbstractNode $node) { |
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| 44 | } |
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| 45 |
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: