Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like EntityRepository often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use EntityRepository, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | class EntityRepository |
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| 10 | { |
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| 11 | /** |
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| 12 | * REST Client. |
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| 13 | * |
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| 14 | * @var RestClient |
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| 15 | */ |
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| 16 | protected $restClient; |
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| 17 | |||
| 18 | /** |
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| 19 | * SDK Client. |
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| 20 | * |
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| 21 | * @var SdkClient |
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| 22 | */ |
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| 23 | protected $sdk; |
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| 24 | |||
| 25 | /** |
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| 26 | * @var string |
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| 27 | */ |
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| 28 | protected $entityName; |
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| 29 | |||
| 30 | /** |
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| 31 | * classMetadataCache |
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| 32 | * |
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| 33 | * @var ClassMetadata |
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| 34 | * @access private |
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| 35 | */ |
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| 36 | private $classMetadataCache; |
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| 37 | |||
| 38 | /** |
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| 39 | * unitOfWork |
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| 40 | * |
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| 41 | * @var UnitOfWork |
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| 42 | * @access private |
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| 43 | */ |
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| 44 | private $unitOfWork; |
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| 45 | |||
| 46 | /** |
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| 47 | * EntityRepository constructor |
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| 48 | * |
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| 49 | * @param SdkClient $sdkClient The client to connect to the datasource with |
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| 50 | * @param RestClient $restClient The client to process the http requests |
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| 51 | * @param string $entityName The entity to work with |
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| 52 | */ |
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| 53 | public function __construct(SdkClient $sdkClient, RestClient $restClient, UnitOfWork $unitOfWork, $entityName) |
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| 60 | |||
| 61 | /** |
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| 62 | * find - finds one item of the entity based on the @REST\Id field in the entity |
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| 63 | * |
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| 64 | * @param string $id id of the element to fetch |
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| 65 | * @param array $queryParams query parameters to add to the query |
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| 66 | * @access public |
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| 67 | * @return object |
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| 68 | */ |
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| 69 | public function find($id, $queryParams = []) |
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| 91 | |||
| 92 | /** |
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| 93 | * findAll |
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| 94 | * |
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| 95 | * @access public |
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| 96 | * @return array |
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| 97 | */ |
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| 98 | public function findAll() |
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| 129 | |||
| 130 | /** |
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| 131 | * remove |
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| 132 | * |
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| 133 | * @param object $model |
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| 134 | * @access public |
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| 135 | * @return void |
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| 136 | * |
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| 137 | * @TODO STILL NEEDS TO BE CONVERTED TO ENTITY MODEL |
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| 138 | */ |
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| 139 | public function remove($model) |
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| 147 | |||
| 148 | /** |
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| 149 | * update |
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| 150 | * |
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| 151 | * @param object $model |
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| 152 | * @access public |
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| 153 | * @return void |
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| 154 | */ |
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| 155 | public function update($model, $serializationContext = [], $queryParams = []) |
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| 178 | |||
| 179 | /** |
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| 180 | * persist |
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| 181 | * |
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| 182 | * @param object $model |
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| 183 | * @access public |
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| 184 | * @return void |
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| 185 | */ |
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| 186 | public function persist($model, $serializationContext = [], $queryParams = []) |
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| 209 | |||
| 210 | /** |
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| 211 | * Adds support for magic finders. |
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| 212 | * |
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| 213 | * @param string $method |
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| 214 | * @param mixed $arguments |
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| 215 | * |
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| 216 | * @return array|object The found entity/entities. |
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| 217 | */ |
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| 218 | public function __call($method, $arguments) |
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| 293 | |||
| 294 | /** |
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| 295 | * fetchFromCache |
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| 296 | * |
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| 297 | * @access protected |
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| 298 | * @param string $key |
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| 299 | * @return object|false |
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| 300 | */ |
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| 301 | protected function fetchFromCache($key) |
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| 316 | |||
| 317 | /** |
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| 318 | * saveToCache |
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| 319 | * |
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| 320 | * @access protected |
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| 321 | * @return object |
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| 322 | */ |
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| 323 | protected function saveToCache($key, $value) |
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| 337 | |||
| 338 | /** |
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| 339 | * removeFromCache |
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| 340 | * |
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| 341 | * @param string $key |
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| 342 | * @access private |
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| 343 | * @return boolean true if no cache or cache successfully cleared, false otherwise |
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| 344 | */ |
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| 345 | protected function removeFromCache($key) |
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| 359 | |||
| 360 | /** |
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| 361 | * addQueryParameter |
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| 362 | * |
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| 363 | * @param string $path path to call |
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| 364 | * @param array $params query parameters to add |
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| 365 | * @access private |
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| 366 | * @return string |
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| 367 | */ |
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| 368 | protected function addQueryParameter($path, $params = []) |
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| 376 | |||
| 377 | /** |
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| 378 | * convertQueryParameters |
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| 379 | * |
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| 380 | * @param array $queryParameters |
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| 381 | * @access private |
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| 382 | * @return array |
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| 383 | */ |
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| 384 | private function convertQueryParameters($queryParameters) |
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| 414 | |||
| 415 | /** |
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| 416 | * normalizeCacheKey |
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| 417 | * |
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| 418 | * @access private |
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| 419 | * @return string |
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| 420 | */ |
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| 421 | private function normalizeCacheKey($key) |
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| 425 | |||
| 426 | private function getClassMetadata() |
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| 436 | } |
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| 437 |
If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue.