1 | <?php |
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17 | abstract class AbstractLazyCollection implements \Iterator, \Countable |
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18 | { |
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19 | /** |
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20 | * @var \Iterator |
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21 | */ |
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22 | protected $documents; |
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23 | |||
24 | /** |
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25 | * {@inheritdoc} |
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26 | */ |
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27 | public function count() |
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33 | |||
34 | /** |
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35 | * {@inheritdoc} |
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36 | */ |
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37 | abstract public function current(); |
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38 | |||
39 | /** |
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40 | * {@inheritdoc} |
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41 | */ |
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42 | public function key() |
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48 | |||
49 | /** |
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50 | * {@inheritdoc} |
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51 | */ |
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52 | public function next() |
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58 | |||
59 | /** |
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60 | * {@inheritdoc} |
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61 | */ |
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62 | public function rewind() |
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68 | |||
69 | /** |
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70 | * {@inheritdoc} |
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71 | */ |
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72 | public function valid() |
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78 | |||
79 | /** |
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80 | * Returns a array of all documents in the collection. |
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81 | * |
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82 | * @return array |
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83 | */ |
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84 | public function toArray() |
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93 | |||
94 | /** |
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95 | * Initialize the collection documents. |
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96 | */ |
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97 | abstract protected function initialize(); |
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98 | } |
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99 |
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: