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 VocabularyConfig 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 VocabularyConfig, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 6 | class VocabularyConfig extends DataObject |
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| 7 | { |
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| 8 | private $plugins; |
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| 9 | |||
| 10 | public function __construct($resource, $globalPlugins=array()) |
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| 11 | { |
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| 12 | $this->resource = $resource; |
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| 13 | $plugins = $this->resource->allLiterals('skosmos:usePlugin'); |
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| 14 | $pluginArray = array(); |
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| 15 | if ($plugins) { |
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| 16 | foreach ($plugins as $pluginlit) { |
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| 17 | $pluginArray[] = $pluginlit->getValue(); |
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| 18 | } |
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| 19 | } |
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| 20 | $this->plugins = new PluginRegister(array_merge($globalPlugins, $pluginArray)); |
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| 21 | } |
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| 22 | |||
| 23 | /** |
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| 24 | * Returns a boolean value based on a literal value from the vocabularies.ttl configuration. |
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| 25 | * @param string $property the property to query |
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| 26 | * @param boolean $default the default value if the value is not set in configuration |
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| 27 | */ |
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| 28 | private function getBoolean($property, $default = false) |
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| 37 | |||
| 38 | /** |
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| 39 | * Returns a boolean value based on a literal value from the vocabularies.ttl configuration. |
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| 40 | * @param string $property the property to query |
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| 41 | * @param string $lang preferred language for the literal, |
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| 42 | */ |
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| 43 | private function getLiteral($property, $lang=null) |
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| 59 | |||
| 60 | /** |
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| 61 | * Get the default language of this vocabulary |
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| 62 | * @return string default language, e.g. 'en' |
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| 63 | */ |
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| 64 | |||
| 65 | public function getDefaultLanguage() |
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| 80 | |||
| 81 | /** |
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| 82 | * Wether the alphabetical index is small enough to be shown all at once. |
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| 83 | * @return boolean true if all concepts can be shown at once. |
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| 84 | */ |
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| 85 | public function getAlphabeticalFull() |
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| 89 | |||
| 90 | /** |
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| 91 | * Returns a short name for a vocabulary if configured. If that has not been set |
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| 92 | * using vocabId as a fallback. |
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| 93 | * @return string |
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| 94 | */ |
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| 95 | public function getShortName() |
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| 104 | |||
| 105 | /** |
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| 106 | * Get the vocabulary feedback e-mail address and return it. |
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| 107 | * |
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| 108 | * @return string e-mail address or null if not defined. |
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| 109 | */ |
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| 110 | public function getFeedbackRecipient() |
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| 115 | |||
| 116 | /** |
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| 117 | * Returns the human readable vocabulary title. |
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| 118 | * @return string the title of the vocabulary |
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| 119 | */ |
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| 120 | public function getTitle($lang = null) |
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| 124 | |||
| 125 | /** |
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| 126 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 127 | * @return boolean |
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| 128 | */ |
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| 129 | public function sortByNotation() |
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| 133 | |||
| 134 | /** |
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| 135 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 136 | * @return boolean |
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| 137 | */ |
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| 138 | public function showChangeList() |
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| 142 | |||
| 143 | /** |
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| 144 | * get the URLs from which the vocabulary data can be downloaded |
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| 145 | * @return array Array with MIME type as key, URL as value |
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| 146 | */ |
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| 147 | public function getDataURLs() |
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| 174 | |||
| 175 | /** |
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| 176 | * Returns the main Concept Scheme URI of that Vocabulary, |
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| 177 | * or null if not set. |
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| 178 | * @return string concept scheme URI or null |
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| 179 | */ |
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| 180 | |||
| 181 | public function getMainConceptSchemeURI() |
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| 190 | |||
| 191 | |||
| 192 | |||
| 193 | /** |
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| 194 | * Returns the class URI used for concept groups in this vocabulary, |
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| 195 | * or null if not set. |
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| 196 | * @return string group class URI or null |
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| 197 | */ |
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| 198 | |||
| 199 | public function getGroupClassURI() |
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| 208 | |||
| 209 | /** |
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| 210 | * Returns the class URI used for thesaurus arrays in this vocabulary, |
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| 211 | * or null if not set. |
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| 212 | * @return string array class URI or null |
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| 213 | */ |
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| 214 | |||
| 215 | public function getArrayClassURI() |
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| 224 | |||
| 225 | /** |
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| 226 | * Returns custom properties displayed on the search page if configured. |
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| 227 | * @return string array class URI or null |
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| 228 | */ |
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| 229 | |||
| 230 | View Code Duplication | public function getAdditionalSearchProperties() |
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| 245 | |||
| 246 | /** |
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| 247 | * Queries whether the property should be shown with all the label language variations. |
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| 248 | * @param string $property |
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| 249 | * @return boolean |
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| 250 | */ |
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| 251 | public function hasMultiLingualProperty($property) |
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| 268 | |||
| 269 | /** |
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| 270 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 271 | * @return boolean |
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| 272 | */ |
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| 273 | public function getShowHierarchy() |
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| 277 | |||
| 278 | /** |
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| 279 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 280 | * @return boolean |
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| 281 | */ |
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| 282 | public function showConceptSchemesInHierarchy() |
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| 286 | |||
| 287 | /** |
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| 288 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 289 | * @return boolean defaults to true if fetching hasn't been explicitly denied. |
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| 290 | */ |
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| 291 | public function getExternalResourcesLoading() |
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| 295 | |||
| 296 | /** |
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| 297 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 298 | * @return boolean |
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| 299 | */ |
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| 300 | public function getShowLangCodes() |
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| 304 | |||
| 305 | /** |
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| 306 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 307 | * @return array array of concept class URIs (can be empty) |
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| 308 | */ |
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| 309 | public function getIndexClasses() |
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| 318 | |||
| 319 | /** |
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| 320 | * Get the languages supported by this vocabulary |
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| 321 | * @return array languages supported by this vocabulary (as language tag strings) |
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| 322 | */ |
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| 323 | public function getLanguages() |
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| 335 | |||
| 336 | /** |
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| 337 | * Returns the vocabulary default sidebar view. |
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| 338 | * @return string name of the view |
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| 339 | */ |
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| 340 | public function getDefaultSidebarView() |
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| 359 | |||
| 360 | /** |
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| 361 | * Extracts the vocabulary id string from the baseuri of the vocabulary. |
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| 362 | * @return string identifier eg. 'mesh'. |
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| 363 | */ |
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| 364 | public function getId() |
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| 378 | |||
| 379 | public function getShowStatistics() { |
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| 382 | |||
| 383 | public function getPlugins() |
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| 387 | |||
| 388 | /** |
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| 389 | * Returns the property/properties used for visualizing concept hierarchies. |
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| 390 | * @return string array class URI or null |
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| 391 | */ |
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| 392 | |||
| 393 | View Code Duplication | public function getHierarchyProperty() |
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| 408 | |||
| 409 | /** |
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| 410 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 411 | * @return boolean |
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| 412 | */ |
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| 413 | public function showNotation() |
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| 417 | |||
| 418 | /** |
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| 419 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 420 | * @return boolean |
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| 421 | */ |
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| 422 | public function showAlphabeticalIndex() |
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| 426 | |||
| 427 | /** |
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| 428 | * Returns a boolean value set in the vocabularies.ttl config. |
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| 429 | * @return boolean |
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| 430 | */ |
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| 431 | public function getShowDeprecated() |
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| 435 | |||
| 436 | /** |
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| 437 | * Returns the vocabulary dc:type value(s) with their labels and uris, if set in the vocabulary configuration. |
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| 438 | * @return array of objects or an empty array |
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| 439 | */ |
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| 440 | public function getTypes($lang = null) |
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| 451 | |||
| 452 | /** |
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| 453 | * Returns an array of fallback languages that is ordered by priority and |
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| 454 | * defined in the vocabulary configuration as a collection. |
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| 455 | * Additionally, the chosen content language is inserted with the highest priority |
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| 456 | * and the vocab default language is inserted with the lowest priority. |
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| 457 | * @param string $clang |
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| 458 | * @return array of language code strings |
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| 459 | */ |
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| 460 | public function getLanguageOrder($clang) |
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| 474 | } |
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| 475 |
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.