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:
| 1 | <?php |
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| 9 | class Configuration implements ConfigurationInterface |
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| 10 | { |
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| 11 | /** |
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| 12 | * Stores supported database drivers. |
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| 13 | * |
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| 14 | * @var array |
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| 15 | */ |
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| 16 | private $supportedDrivers = array('orm', 'mongodb', 'propel', 'phpcr'); |
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| 17 | |||
| 18 | /** |
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| 19 | * If the kernel is running in debug mode. |
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| 20 | * |
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| 21 | * @var bool |
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| 22 | */ |
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| 23 | private $debug; |
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| 24 | |||
| 25 | 26 | public function __construct($debug) |
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| 26 | { |
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| 27 | 26 | $this->debug = $debug; |
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| 28 | 26 | } |
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| 29 | |||
| 30 | /** |
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| 31 | * Generates the configuration tree. |
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| 32 | * |
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| 33 | * @return TreeBuilder |
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| 34 | */ |
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| 35 | 26 | public function getConfigTreeBuilder() |
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| 36 | { |
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| 37 | 26 | $treeBuilder = new TreeBuilder(); |
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| 38 | 26 | $rootNode = $treeBuilder->root('fos_elastica', 'array'); |
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| 39 | |||
| 40 | 26 | $this->addClientsSection($rootNode); |
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| 41 | 26 | $this->addIndexesSection($rootNode); |
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| 42 | |||
| 43 | $rootNode |
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| 44 | 26 | ->children() |
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| 45 | 26 | ->scalarNode('default_client') |
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| 46 | 26 | ->info('Defaults to the first client defined') |
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| 47 | 26 | ->end() |
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| 48 | 26 | ->scalarNode('default_index') |
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| 49 | 26 | ->info('Defaults to the first index defined') |
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| 50 | 26 | ->end() |
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| 51 | 26 | ->scalarNode('default_manager')->defaultValue('orm')->end() |
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| 52 | 26 | ->arrayNode('serializer') |
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| 53 | 26 | ->treatNullLike(array()) |
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| 54 | 26 | ->children() |
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| 55 | 26 | ->scalarNode('callback_class')->defaultValue('FOS\ElasticaBundle\Serializer\Callback')->end() |
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| 56 | 26 | ->scalarNode('serializer')->defaultValue('serializer')->end() |
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| 57 | 26 | ->end() |
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| 58 | 26 | ->end() |
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| 59 | 26 | ->end() |
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| 60 | ; |
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| 61 | |||
| 62 | 26 | return $treeBuilder; |
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| 63 | } |
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| 64 | |||
| 65 | /** |
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| 66 | * Adds the configuration for the "clients" key. |
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| 67 | */ |
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| 68 | 26 | private function addClientsSection(ArrayNodeDefinition $rootNode) |
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| 150 | |||
| 151 | /** |
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| 152 | * Adds the configuration for the "indexes" key. |
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| 153 | */ |
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| 154 | 26 | private function addIndexesSection(ArrayNodeDefinition $rootNode) |
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| 155 | { |
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| 156 | $rootNode |
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| 157 | 26 | ->fixXmlConfig('index') |
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| 158 | 26 | ->children() |
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| 159 | 26 | ->arrayNode('indexes') |
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| 160 | 26 | ->useAttributeAsKey('name') |
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| 161 | 26 | ->prototype('array') |
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| 162 | 26 | ->children() |
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| 163 | 26 | ->scalarNode('index_name') |
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| 164 | 26 | ->info('Defaults to the name of the index, but can be modified if the index name is different in ElasticSearch') |
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| 165 | 26 | ->end() |
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| 166 | 26 | ->booleanNode('use_alias')->defaultValue(false)->end() |
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| 167 | 26 | ->scalarNode('client')->end() |
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| 168 | 26 | ->scalarNode('finder') |
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| 169 | 26 | ->treatNullLike(true) |
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| 170 | 26 | ->defaultFalse() |
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| 171 | 26 | ->end() |
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| 172 | 26 | ->arrayNode('type_prototype') |
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| 173 | 26 | ->children() |
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| 174 | 26 | ->scalarNode('index_analyzer')->end() |
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| 175 | 26 | ->scalarNode('search_analyzer')->end() |
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| 176 | 26 | ->append($this->getPersistenceNode()) |
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| 177 | 26 | ->append($this->getSerializerNode()) |
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| 178 | 26 | ->end() |
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| 179 | 26 | ->end() |
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| 180 | 26 | ->variableNode('settings')->defaultValue(array())->end() |
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| 181 | 26 | ->end() |
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| 182 | 26 | ->append($this->getTypesNode()) |
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| 183 | 26 | ->end() |
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| 184 | 26 | ->end() |
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| 185 | 26 | ->end() |
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| 186 | ; |
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| 187 | 26 | } |
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| 188 | |||
| 189 | /** |
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| 190 | * Returns the array node used for "types". |
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| 191 | */ |
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| 192 | 26 | protected function getTypesNode() |
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| 284 | |||
| 285 | /** |
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| 286 | * Returns the array node used for "properties". |
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| 287 | */ |
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| 288 | 26 | protected function getPropertiesNode() |
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| 289 | { |
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| 290 | 26 | $builder = new TreeBuilder(); |
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| 291 | 26 | $node = $builder->root('properties'); |
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| 292 | |||
| 293 | $node |
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| 294 | 26 | ->useAttributeAsKey('name') |
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| 295 | 26 | ->prototype('variable') |
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| 296 | 26 | ->treatNullLike(array()); |
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| 297 | |||
| 298 | 26 | return $node; |
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| 299 | } |
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| 300 | |||
| 301 | /** |
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| 302 | * Returns the array node used for "dynamic_templates". |
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| 303 | */ |
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| 304 | 26 | public function getDynamicTemplateNode() |
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| 305 | { |
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| 306 | 26 | $builder = new TreeBuilder(); |
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| 307 | 26 | $node = $builder->root('dynamic_templates'); |
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| 308 | |||
| 309 | $node |
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| 310 | 26 | ->prototype('array') |
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| 311 | 26 | ->prototype('array') |
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| 312 | 26 | ->children() |
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| 313 | 26 | ->scalarNode('match')->end() |
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| 314 | 26 | ->scalarNode('unmatch')->end() |
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| 315 | 26 | ->scalarNode('match_mapping_type')->end() |
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| 316 | 26 | ->scalarNode('path_match')->end() |
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| 317 | 26 | ->scalarNode('path_unmatch')->end() |
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| 318 | 26 | ->scalarNode('match_pattern')->end() |
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| 319 | 26 | ->arrayNode('mapping') |
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| 320 | 26 | ->prototype('variable') |
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| 321 | 26 | ->treatNullLike(array()) |
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| 322 | 26 | ->end() |
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| 323 | 26 | ->end() |
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| 324 | 26 | ->end() |
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| 325 | 26 | ->end() |
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| 326 | 26 | ->end() |
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| 327 | ; |
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| 328 | |||
| 329 | 26 | return $node; |
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| 330 | } |
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| 331 | |||
| 332 | /** |
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| 333 | * Returns the array node used for "_id". |
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| 334 | */ |
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| 335 | 26 | View Code Duplication | protected function getIdNode() |
| 336 | { |
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| 337 | 26 | $builder = new TreeBuilder(); |
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| 338 | 26 | $node = $builder->root('_id'); |
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| 339 | |||
| 340 | $node |
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| 341 | 26 | ->children() |
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| 342 | 26 | ->scalarNode('path')->end() |
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| 343 | 26 | ->end() |
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| 344 | ; |
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| 345 | |||
| 346 | 26 | return $node; |
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| 347 | } |
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| 348 | |||
| 349 | /** |
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| 350 | * Returns the array node used for "_source". |
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| 351 | */ |
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| 352 | 26 | protected function getSourceNode() |
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| 353 | { |
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| 354 | 26 | $builder = new TreeBuilder(); |
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| 355 | 26 | $node = $builder->root('_source'); |
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| 356 | |||
| 357 | $node |
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| 358 | 26 | ->children() |
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| 359 | 26 | ->arrayNode('excludes') |
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| 360 | 26 | ->useAttributeAsKey('name') |
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| 361 | 26 | ->prototype('scalar')->end() |
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| 362 | 26 | ->end() |
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| 363 | 26 | ->arrayNode('includes') |
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| 364 | 26 | ->useAttributeAsKey('name') |
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| 365 | 26 | ->prototype('scalar')->end() |
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| 366 | 26 | ->end() |
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| 367 | 26 | ->scalarNode('compress')->end() |
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| 368 | 26 | ->scalarNode('compress_threshold')->end() |
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| 369 | 26 | ->scalarNode('enabled')->defaultTrue()->end() |
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| 370 | 26 | ->end() |
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| 371 | ; |
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| 372 | |||
| 373 | 26 | return $node; |
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| 374 | } |
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| 375 | |||
| 376 | /** |
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| 377 | * Returns the array node used for "_boost". |
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| 378 | */ |
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| 379 | 26 | protected function getBoostNode() |
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| 380 | { |
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| 381 | 26 | $builder = new TreeBuilder(); |
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| 382 | 26 | $node = $builder->root('_boost'); |
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| 383 | |||
| 384 | $node |
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| 385 | 26 | ->children() |
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| 386 | 26 | ->scalarNode('name')->end() |
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| 387 | 26 | ->scalarNode('null_value')->end() |
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| 388 | 26 | ->end() |
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| 389 | ; |
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| 390 | |||
| 391 | 26 | return $node; |
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| 392 | } |
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| 393 | |||
| 394 | /** |
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| 395 | * Returns the array node used for "_routing". |
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| 396 | */ |
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| 397 | 26 | View Code Duplication | protected function getRoutingNode() |
| 398 | { |
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| 399 | 26 | $builder = new TreeBuilder(); |
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| 400 | 26 | $node = $builder->root('_routing'); |
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| 401 | |||
| 402 | $node |
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| 403 | 26 | ->children() |
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| 404 | 26 | ->scalarNode('required')->end() |
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| 405 | 26 | ->scalarNode('path')->end() |
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| 406 | 26 | ->end() |
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| 407 | ; |
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| 408 | |||
| 409 | 26 | return $node; |
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| 410 | } |
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| 411 | |||
| 412 | /** |
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| 413 | * Returns the array node used for "_parent". |
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| 414 | */ |
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| 415 | 26 | protected function getParentNode() |
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| 416 | { |
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| 417 | 26 | $builder = new TreeBuilder(); |
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| 418 | 26 | $node = $builder->root('_parent'); |
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| 419 | |||
| 420 | $node |
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| 421 | 26 | ->children() |
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| 422 | 26 | ->scalarNode('type')->end() |
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| 423 | 26 | ->scalarNode('property')->defaultValue(null)->end() |
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| 424 | 26 | ->scalarNode('identifier')->defaultValue('id')->end() |
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| 425 | 26 | ->end() |
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| 426 | ; |
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| 427 | |||
| 428 | 26 | return $node; |
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| 429 | } |
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| 430 | |||
| 431 | /** |
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| 432 | * Returns the array node used for "_all". |
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| 433 | */ |
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| 434 | 26 | protected function getAllNode() |
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| 435 | { |
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| 436 | 26 | $builder = new TreeBuilder(); |
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| 437 | 26 | $node = $builder->root('_all'); |
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| 438 | |||
| 439 | $node |
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| 440 | 26 | ->children() |
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| 441 | 26 | ->scalarNode('enabled')->defaultValue(true)->end() |
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| 442 | 26 | ->scalarNode('index_analyzer')->end() |
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| 443 | 26 | ->scalarNode('search_analyzer')->end() |
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| 444 | 26 | ->end() |
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| 445 | ; |
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| 446 | |||
| 447 | 26 | return $node; |
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| 448 | } |
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| 449 | |||
| 450 | /** |
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| 451 | * Returns the array node used for "_timestamp". |
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| 452 | */ |
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| 453 | 26 | View Code Duplication | protected function getTimestampNode() |
| 454 | { |
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| 455 | 26 | $builder = new TreeBuilder(); |
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| 456 | 26 | $node = $builder->root('_timestamp'); |
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| 457 | |||
| 458 | $node |
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| 459 | 26 | ->children() |
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| 460 | 26 | ->scalarNode('enabled')->defaultValue(true)->end() |
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| 461 | 26 | ->scalarNode('path')->end() |
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| 462 | 26 | ->scalarNode('format')->end() |
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| 463 | 26 | ->scalarNode('store')->end() |
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| 464 | 26 | ->scalarNode('index')->end() |
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| 465 | 26 | ->end() |
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| 466 | ; |
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| 467 | |||
| 468 | 26 | return $node; |
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| 469 | } |
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| 470 | |||
| 471 | /** |
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| 472 | * Returns the array node used for "_ttl". |
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| 473 | */ |
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| 474 | 26 | View Code Duplication | protected function getTtlNode() |
| 475 | { |
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| 476 | 26 | $builder = new TreeBuilder(); |
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| 477 | 26 | $node = $builder->root('_ttl'); |
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| 478 | |||
| 479 | $node |
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| 480 | 26 | ->children() |
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| 481 | 26 | ->scalarNode('enabled')->defaultValue(true)->end() |
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| 482 | 26 | ->scalarNode('default')->end() |
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| 483 | 26 | ->scalarNode('store')->end() |
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| 484 | 26 | ->scalarNode('index')->end() |
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| 485 | 26 | ->end() |
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| 486 | ; |
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| 487 | |||
| 488 | 26 | return $node; |
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| 489 | } |
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| 490 | |||
| 491 | /** |
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| 492 | * @return ArrayNodeDefinition|\Symfony\Component\Config\Definition\Builder\NodeDefinition |
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| 493 | */ |
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| 494 | 26 | protected function getPersistenceNode() |
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| 586 | |||
| 587 | /** |
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| 588 | * @return ArrayNodeDefinition|\Symfony\Component\Config\Definition\Builder\NodeDefinition |
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| 589 | */ |
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| 590 | 26 | protected function getSerializerNode() |
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| 610 | } |
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| 611 |
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: