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 Store 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 Store, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 25 | class Store |
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| 26 | { |
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| 27 | /** |
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| 28 | * @var MetadataFactory |
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| 29 | */ |
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| 30 | private $mf; |
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| 31 | |||
| 32 | /** |
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| 33 | * @var TypeFactory |
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| 34 | */ |
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| 35 | private $typeFactory; |
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| 36 | |||
| 37 | /** |
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| 38 | * The storage layer manager. |
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| 39 | * Retrieves the appropriate persister and search client for handling records. |
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| 40 | * |
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| 41 | * @var StorageLayerManager |
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| 42 | */ |
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| 43 | private $storageManager; |
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| 44 | |||
| 45 | /** |
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| 46 | * Contains all models currently loaded in memory. |
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| 47 | * |
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| 48 | * @var Cache |
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| 49 | */ |
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| 50 | private $cache; |
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| 51 | |||
| 52 | /** |
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| 53 | * The event dispatcher for firing model lifecycle events. |
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| 54 | * |
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| 55 | * @var EventDispatcher |
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| 56 | */ |
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| 57 | private $dispatcher; |
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| 58 | |||
| 59 | /** |
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| 60 | * Constructor. |
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| 61 | * |
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| 62 | * @param MetadataFactory $mf |
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| 63 | * @param StorageLayerManager $storageManager |
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| 64 | * @param TypeFactory $typeFactory |
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| 65 | * @param EventDispatcher $dispatcher |
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| 66 | */ |
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| 67 | public function __construct(MetadataFactory $mf, StorageLayerManager $storageManager, TypeFactory $typeFactory, EventDispatcher $dispatcher) |
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| 75 | |||
| 76 | /** |
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| 77 | * Finds a single record from the persistence layer, by type and id. |
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| 78 | * Will return a Model object if found, or throw an exception if not. |
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| 79 | * |
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| 80 | * @api |
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| 81 | * @param string $typeKey The model type. |
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| 82 | * @param string $identifier The model id. |
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| 83 | * @return Model |
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| 84 | */ |
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| 85 | public function find($typeKey, $identifier) |
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| 93 | |||
| 94 | /** |
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| 95 | * Returns the available type keys from the MetadataFactory |
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| 96 | * |
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| 97 | * @return array |
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| 98 | */ |
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| 99 | public function getModelTypes() |
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| 103 | |||
| 104 | /** |
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| 105 | * Finds all records (or filtered by specific identifiers) for a type. |
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| 106 | * |
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| 107 | * @todo Add sorting and pagination (limit/skip). |
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| 108 | * @todo Handle find all with identifiers. |
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| 109 | * @param string $typeKey The model type. |
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| 110 | * @param array $idenitifiers The model identifiers (optional). |
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| 111 | * @return Collections\Collection |
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| 112 | */ |
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| 113 | public function findAll($typeKey, array $identifiers = []) |
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| 123 | |||
| 124 | /** |
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| 125 | * Queries records based on a provided set of criteria. |
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| 126 | * |
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| 127 | * @param string $typeKey The model type. |
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| 128 | * @param array $criteria The query criteria. |
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| 129 | * @param array $fields Fields to include/exclude. |
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| 130 | * @param array $sort The sort criteria. |
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| 131 | * @param int $offset The starting offset, aka the number of Models to skip. |
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| 132 | * @param int $limit The number of Models to limit. |
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| 133 | * @return Collections\Collection |
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| 134 | */ |
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| 135 | public function findQuery($typeKey, array $criteria, array $fields = [], array $sort = [], $offset = 0, $limit = 0) |
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| 145 | |||
| 146 | /** |
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| 147 | * Searches for records (via the search layer) for a specific type, attribute, and value. |
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| 148 | * Uses the autocomplete logic to fullfill the request. |
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| 149 | * |
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| 150 | * @todo Determine if full models should be return, or only specific fields. |
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| 151 | * Autocompleters needs to be fast. If only specific fields are returned, do we need to exclude nulls in serialization? |
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| 152 | * @todo Is search enabled for all models, by default, where everything is stored? |
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| 153 | * |
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| 154 | * @param string $typeKey |
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| 155 | * @param string $attributeKey |
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| 156 | * @param string $searchValue |
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| 157 | * @return Collections\Collection |
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| 158 | */ |
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| 159 | public function searchAutocomplete($typeKey, $attributeKey, $searchValue) |
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| 167 | |||
| 168 | /** |
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| 169 | * Creates a new record. |
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| 170 | * The model will not be comitted to the persistence layer until $model->save() is called. |
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| 171 | * |
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| 172 | * @api |
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| 173 | * @param string $typeKey The model type. |
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| 174 | * @param string|null $identifier The model identifier. Generally should be null unless client-side id generation is in place. |
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| 175 | * @return Model |
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| 176 | */ |
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| 177 | public function create($typeKey, $identifier = null) |
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| 184 | |||
| 185 | /** |
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| 186 | * Deletes a model. |
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| 187 | * The moel will be immediately deleted once retrieved. |
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| 188 | * |
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| 189 | * @api |
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| 190 | * @param string $typeKey The model type. |
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| 191 | * @param string|null $identifier The model identifier. |
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| 192 | * @return Model |
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| 193 | */ |
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| 194 | public function delete($typeKey, $identifier) |
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| 199 | |||
| 200 | /** |
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| 201 | * Retrieves a Record object from the persistence layer. |
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| 202 | * |
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| 203 | * @param string $typeKey The model type. |
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| 204 | * @param string $identifier The model identifier. |
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| 205 | * @return Record |
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| 206 | * @throws StoreException If the record cannot be found. |
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| 207 | */ |
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| 208 | public function retrieveRecord($typeKey, $identifier) |
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| 217 | |||
| 218 | /** |
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| 219 | * Retrieves multiple Record objects from the persistence layer. |
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| 220 | * |
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| 221 | * @todo Implement sorting and pagination (limit/skip). |
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| 222 | * @param string $typeKey The model type. |
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| 223 | * @param array $identifiers The model identifier. |
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| 224 | * @return Record[] |
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| 225 | */ |
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| 226 | public function retrieveRecords($typeKey, array $identifiers) |
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| 231 | |||
| 232 | /** |
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| 233 | * Retrieves multiple Record objects from the persistence layer for an inverse relationship. |
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| 234 | * |
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| 235 | * @todo Need to find a way to query all inverse at the same time for a findAll query, as it's queried multiple times. |
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| 236 | * @param string $ownerTypeKey |
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| 237 | * @param string $relTypeKey |
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| 238 | * @param array $identifiers |
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| 239 | * @param string $inverseField |
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| 240 | * @return Record[] |
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| 241 | */ |
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| 242 | public function retrieveInverseRecords($ownerTypeKey, $relTypeKey, array $identifiers, $inverseField) |
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| 253 | |||
| 254 | /** |
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| 255 | * Loads/creates a model from a persistence layer Record. |
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| 256 | * |
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| 257 | * @param string $typeKey The model type. |
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| 258 | * @param Record $record The persistence layer record. |
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| 259 | * @return Model |
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| 260 | */ |
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| 261 | protected function loadModel($typeKey, Record $record) |
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| 275 | |||
| 276 | /** |
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| 277 | * Loads/creates multiple models from persistence layer Records. |
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| 278 | * |
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| 279 | * @param string $typeKey The model type. |
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| 280 | * @param Record[] $records The persistence layer records. |
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| 281 | * @return Model[] |
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| 282 | */ |
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| 283 | protected function loadModels($typeKey, array $records) |
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| 291 | |||
| 292 | /** |
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| 293 | * Dispatches a model lifecycle event via the event dispatcher. |
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| 294 | * |
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| 295 | * @param string $eventName |
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| 296 | * @param Model $model |
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| 297 | * @return self |
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| 298 | */ |
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| 299 | protected function dispatchLifecycleEvent($eventName, Model $model) |
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| 305 | |||
| 306 | /** |
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| 307 | * Creates a new Model instance. |
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| 308 | * Will not be persisted until $model->save() is called. |
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| 309 | * |
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| 310 | * @param string $typeKey The model type. |
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| 311 | * @param string $identifier The model identifier. |
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| 312 | * @return Model |
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| 313 | */ |
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| 314 | protected function createModel($typeKey, $identifier) |
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| 328 | |||
| 329 | /** |
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| 330 | * Loads a has-one model proxy. |
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| 331 | * |
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| 332 | * @param string $relatedTypeKey |
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| 333 | * @param string $identifier |
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| 334 | * @return Model |
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| 335 | */ |
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| 336 | public function loadProxyModel($relatedTypeKey, $identifier) |
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| 348 | |||
| 349 | /** |
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| 350 | * Loads an Embed model |
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| 351 | * |
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| 352 | * @param EmbedMetadata $embedMeta |
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| 353 | * @param array $embed |
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| 354 | * @return Embed |
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| 355 | */ |
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| 356 | public function loadEmbed(EmbedMetadata $embedMeta, array $embed) |
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| 360 | |||
| 361 | /** |
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| 362 | * Loads a has-many inverse model collection. |
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| 363 | * |
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| 364 | * @param RelationshipMetadata $relMeta |
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| 365 | * @param Model $owner |
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| 366 | * @return Collections\InverseCollection |
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| 367 | */ |
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| 368 | public function createInverseCollection(RelationshipMetadata $relMeta, Model $owner) |
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| 373 | |||
| 374 | /** |
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| 375 | * Loads a has-many embed collection. |
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| 376 | * |
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| 377 | * @param EmbeddedPropMetadata $relMeta |
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| 378 | * @param array|null $embedDocs |
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| 379 | * @return Collections\EmbedCollection |
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| 380 | */ |
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| 381 | public function createEmbedCollection(EmbeddedPropMetadata $embededPropMeta, array $embedDocs = null) |
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| 397 | |||
| 398 | /** |
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| 399 | * Loads a has-many model collection. |
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| 400 | * |
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| 401 | * @param RelationshipMetadata $relMeta |
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| 402 | * @param array|null $references |
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| 403 | * @return Collections\Collection |
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| 404 | */ |
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| 405 | public function createCollection(RelationshipMetadata $relMeta, array $references = null) |
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| 420 | |||
| 421 | /** |
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| 422 | * Loads/fills a collection of empty (unloaded) models with data from the persistence layer. |
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| 423 | * |
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| 424 | * @param Collections\AbstractCollection $collection |
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| 425 | * @return Model[] |
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| 426 | */ |
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| 427 | public function loadCollection(Collections\AbstractCollection $collection) |
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| 450 | |||
| 451 | /** |
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| 452 | * Commits a model by persisting it to the database. |
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| 453 | * |
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| 454 | * @todo Eventually we'll want to schedule models and allow for mutiple commits, flushes, etc. |
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| 455 | * @todo Will need to handle cascade saving of new or modified relationships?? |
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| 456 | * @param Model $model The model to commit. |
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| 457 | * @return Model |
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| 458 | */ |
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| 459 | public function commit(Model $model) |
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| 485 | |||
| 486 | /** |
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| 487 | * Performs a Model creation commit and persists to the database. |
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| 488 | * |
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| 489 | * @param Model $model |
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| 490 | * @return Model |
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| 491 | */ |
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| 492 | View Code Duplication | private function doCommitCreate(Model $model) |
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| 504 | |||
| 505 | /** |
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| 506 | * Performs a Model delete commit and persists to the database. |
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| 507 | * |
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| 508 | * @param Model $model |
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| 509 | * @return Model |
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| 510 | */ |
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| 511 | View Code Duplication | private function doCommitDelete(Model $model) |
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| 521 | |||
| 522 | /** |
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| 523 | * Performs a Model update commit and persists to the database. |
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| 524 | * |
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| 525 | * @param Model $model |
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| 526 | * @return Model |
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| 527 | */ |
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| 528 | View Code Duplication | private function doCommitUpdate(Model $model) |
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| 539 | |||
| 540 | /** |
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| 541 | * Validates that an embed name/type can be set to an owning embed metadata type. |
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| 542 | * |
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| 543 | * @param EmbedMetadata $owningMeta The metadata the type will be added to. |
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| 544 | * @param string $nameToCheck The name to check. |
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| 545 | * @return self |
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| 546 | * @throws StoreException If the type to add is not supported. |
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| 547 | */ |
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| 548 | public function validateEmbedSet(EmbedMetadata $owningMeta, $nameToCheck) |
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| 555 | |||
| 556 | /** |
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| 557 | * Validates that a model type can be set to an owning metadata type. |
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| 558 | * |
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| 559 | * @param EntityMetadata $owningMeta The metadata the type will be added to. |
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| 560 | * @param string $typeToAdd The type to add. |
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| 561 | * @return self |
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| 562 | * @throws StoreException If the type to add is not supported. |
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| 563 | */ |
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| 564 | public function validateRelationshipSet(EntityMetadata $owningMeta, $typeToAdd) |
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| 576 | |||
| 577 | /** |
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| 578 | * Converts an attribute value to the proper Modlr data type. |
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| 579 | * |
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| 580 | * @param string $dataType The data type, such as string, integer, boolean, etc. |
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| 581 | * @param mixed $value The value to convert. |
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| 582 | * @return mixed |
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| 583 | */ |
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| 584 | public function convertAttributeValue($dataType, $value) |
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| 588 | |||
| 589 | /** |
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| 590 | * Determines if a model is eligible for commit. |
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| 591 | * |
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| 592 | * @todo Does delete need to be here? |
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| 593 | * @param Model $model |
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| 594 | * @return bool |
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| 595 | */ |
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| 596 | protected function shouldCommit(Model $model) |
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| 601 | |||
| 602 | /** |
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| 603 | * Determines the persister to use for the provided model key. |
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| 604 | * |
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| 605 | * @param string $typeKey The model type key. |
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| 606 | * @return PersisterInterface |
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| 607 | */ |
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| 608 | protected function getPersisterFor($typeKey) |
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| 613 | |||
| 614 | /** |
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| 615 | * Generates a new identifier value for a model type. |
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| 616 | * |
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| 617 | * @param string $typeKey The model type. |
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| 618 | * @return string |
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| 619 | */ |
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| 620 | protected function generateIdentifier($typeKey) |
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| 624 | |||
| 625 | /** |
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| 626 | * Converts the id value to a normalized string. |
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| 627 | * |
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| 628 | * @param mixed $identenfier The identifier to convert. |
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| 629 | * @return string |
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| 630 | */ |
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| 631 | protected function convertId($identifier) |
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| 635 | |||
| 636 | /** |
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| 637 | * Gets the metadata for a model type. |
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| 638 | * |
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| 639 | * @param string $typeKey The model type. |
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| 640 | * @return EntityMetadata |
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| 641 | */ |
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| 642 | public function getMetadataForType($typeKey) |
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| 646 | |||
| 647 | /** |
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| 648 | * Gets the metadata for a relationship. |
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| 649 | * |
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| 650 | * @param RelationshipMetadata $relMeta The relationship metadata. |
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| 651 | * @return EntityMetadata |
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| 652 | */ |
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| 653 | public function getMetadataForRelationship(RelationshipMetadata $relMeta) |
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| 657 | |||
| 658 | /** |
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| 659 | * Determines if an array is sequential. |
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| 660 | * |
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| 661 | * @param array $arr |
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| 662 | * @return bool |
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| 663 | */ |
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| 664 | protected function isSequentialArray(array $arr) |
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| 671 | } |
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| 672 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. It has, however, found a similar but not annotated parameter which might be a good fit.
Consider the following example. The parameter
$irelandis not defined by the methodfinale(...).The most likely cause is that the parameter was changed, but the annotation was not.