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 AbstractAdminListConfigurator 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 AbstractAdminListConfigurator, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 23 | abstract class AbstractAdminListConfigurator implements AdminListConfiguratorInterface, ExportListConfiguratorInterface  | 
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| 24 | { | 
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| 25 | const SUFFIX_ADD = 'add';  | 
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| 26 | const SUFFIX_EDIT = 'edit';  | 
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| 27 | const SUFFIX_EXPORT = 'export';  | 
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| 28 | const SUFFIX_DELETE = 'delete';  | 
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| 29 | const SUFFIX_VIEW = 'view';  | 
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| 30 | |||
| 31 | /**  | 
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| 32 | * @var Field[]  | 
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| 33 | */  | 
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| 34 | private $fields = array();  | 
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| 35 | |||
| 36 | /**  | 
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| 37 | * @var Field[]  | 
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| 38 | */  | 
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| 39 | private $exportFields = array();  | 
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| 40 | |||
| 41 | /**  | 
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| 42 | * @var ItemActionInterface[]  | 
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| 43 | */  | 
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| 44 | private $itemActions = array();  | 
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| 45 | |||
| 46 | /**  | 
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| 47 | * @var ListActionInterface[]  | 
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| 48 | */  | 
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| 49 | private $listActions = array();  | 
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| 50 | |||
| 51 | /**  | 
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| 52 | * @var BulkActionInterface[]  | 
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| 53 | */  | 
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| 54 | private $bulkActions = array();  | 
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| 55 | |||
| 56 | /**  | 
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| 57 | * @var AbstractType  | 
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| 58 | */  | 
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| 59 | private $type;  | 
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| 60 | |||
| 61 | /**  | 
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| 62 | * @var array  | 
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| 63 | */  | 
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| 64 | private $typeOptions = array();  | 
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| 65 | |||
| 66 | /**  | 
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| 67 | * @var string  | 
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| 68 | */  | 
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| 69 | private $listTemplate = '@KunstmaanAdminList/Default/list.html.twig';  | 
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| 70 | |||
| 71 | /**  | 
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| 72 | * @var string  | 
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| 73 | */  | 
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| 74 | private $addTemplate = '@KunstmaanAdminList/Default/add_or_edit.html.twig';  | 
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| 75 | |||
| 76 | /**  | 
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| 77 | * @var string  | 
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| 78 | */  | 
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| 79 | private $editTemplate = '@KunstmaanAdminList/Default/add_or_edit.html.twig';  | 
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| 80 | |||
| 81 | /**  | 
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| 82 | * @var string  | 
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| 83 | */  | 
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| 84 | private $viewTemplate = '@KunstmaanAdminList/Default/view.html.twig';  | 
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| 85 | |||
| 86 | /**  | 
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| 87 | * @var string  | 
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| 88 | */  | 
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| 89 | private $deleteTemplate = '@KunstmaanAdminList/Default/delete.html.twig';  | 
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| 90 | |||
| 91 | /**  | 
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| 92 | * @var FilterBuilder  | 
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| 93 | */  | 
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| 94 | private $filterBuilder;  | 
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| 95 | |||
| 96 | /**  | 
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| 97 | * @var int  | 
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| 98 | */  | 
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| 99 | protected $page = 1;  | 
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| 100 | |||
| 101 | /**  | 
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| 102 | * @var string  | 
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| 103 | */  | 
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| 104 | protected $orderBy = '';  | 
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| 105 | |||
| 106 | /**  | 
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| 107 | * @var string  | 
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| 108 | */  | 
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| 109 | protected $orderDirection = '';  | 
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| 110 | |||
| 111 | /**  | 
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| 112 | * Return current bundle name.  | 
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| 113 | *  | 
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| 114 | * @return string  | 
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| 115 | */  | 
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| 116 | abstract public function getBundleName();  | 
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| 117 | |||
| 118 | /**  | 
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| 119 | * Return current entity name.  | 
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| 120 | *  | 
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| 121 | * @return string  | 
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| 122 | */  | 
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| 123 | abstract public function getEntityName();  | 
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| 124 | |||
| 125 | /**  | 
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| 126 | * Return default repository name.  | 
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| 127 | *  | 
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| 128 | * @return string  | 
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| 129 | */  | 
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| 130 | 8 | public function getRepositoryName()  | 
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| 134 | |||
| 135 | /**  | 
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| 136 | * Configure the fields you can filter on  | 
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| 137 | */  | 
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| 138 | public function buildFilters()  | 
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| 141 | |||
| 142 | /**  | 
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| 143 | * Configure the actions for each line  | 
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| 144 | */  | 
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| 145 | public function buildItemActions()  | 
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| 148 | |||
| 149 | /**  | 
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| 150 | * Configure the actions that can be executed on the whole list  | 
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| 151 | */  | 
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| 152 | public function buildListActions()  | 
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| 155 | |||
| 156 | /**  | 
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| 157 | * Configure the export fields  | 
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| 158 | */  | 
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| 159 | 1 | public function buildExportFields()  | 
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| 170 | |||
| 171 | /**  | 
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| 172 | * Build iterator (if needed)  | 
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| 173 | */  | 
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| 174 | public function buildIterator()  | 
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| 177 | |||
| 178 | /**  | 
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| 179 | * Reset all built members  | 
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| 180 | */  | 
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| 181 | 1 | public function resetBuilds()  | 
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| 189 | |||
| 190 | /**  | 
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| 191 | * Configure the types of items you can add  | 
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| 192 | *  | 
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| 193 | * @param array $params  | 
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| 194 | *  | 
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| 195 | * @return array  | 
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| 196 | */  | 
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| 197 | 1 | public function getAddUrlFor(array $params = array())  | 
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| 214 | |||
| 215 | /**  | 
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| 216 | * Get the url to export the listed items  | 
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| 217 | *  | 
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| 218 | * @return array  | 
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| 219 | */  | 
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| 220 | 1 | public function getExportUrl()  | 
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| 229 | |||
| 230 | /**  | 
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| 231 | * Get the view url for the given $item  | 
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| 232 | *  | 
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| 233 | * @param object|array $item  | 
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| 234 | *  | 
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| 235 | * @return array  | 
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| 236 | */  | 
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| 237 | 1 | public function getViewUrlFor($item)  | 
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| 252 | |||
| 253 | /**  | 
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| 254 | * Return the url to list all the items  | 
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| 255 | *  | 
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| 256 | * @return array  | 
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| 257 | */  | 
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| 258 | 1 | public function getIndexUrl()  | 
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| 267 | |||
| 268 | /**  | 
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| 269 | * @param object $entity  | 
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| 270 | *  | 
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| 271 | * @throws InvalidArgumentException  | 
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| 272 | *  | 
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| 273 | * @return string  | 
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| 274 | */  | 
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| 275 | 3 | public function getAdminType($entity)  | 
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| 287 | |||
| 288 | /**  | 
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| 289 | * @param string $type  | 
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| 290 | *  | 
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| 291 | * @return AbstractAdminListConfigurator  | 
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| 292 | */  | 
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| 293 | 6 | public function setAdminType($type)  | 
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| 299 | |||
| 300 | /**  | 
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| 301 | * @param array $typeOptions  | 
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| 302 | *  | 
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| 303 | * @return AbstractAdminListConfigurator  | 
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| 304 | */  | 
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| 305 | 5 | public function setAdminTypeOptions($typeOptions)  | 
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| 311 | |||
| 312 | /**  | 
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| 313 | * Return the default form admin type options  | 
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| 314 | *  | 
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| 315 | * @return array  | 
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| 316 | */  | 
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| 317 | 1 | public function getAdminTypeOptions()  | 
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| 321 | |||
| 322 | /**  | 
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| 323 | * @param object|array $item  | 
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| 324 | *  | 
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| 325 | * @return bool  | 
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| 326 | */  | 
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| 327 | 1 | public function canEdit($item)  | 
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| 331 | |||
| 332 | /**  | 
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| 333 | * Configure if it's possible to delete the given $item  | 
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| 334 | *  | 
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| 335 | * @param object|array $item  | 
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| 336 | *  | 
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| 337 | * @return bool  | 
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| 338 | */  | 
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| 339 | 1 | public function canDelete($item)  | 
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| 343 | |||
| 344 | /**  | 
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| 345 | * Configure if it's possible to add new items  | 
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| 346 | *  | 
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| 347 | * @return bool  | 
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| 348 | */  | 
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| 349 | 1 | public function canAdd()  | 
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| 353 | |||
| 354 | 1 | public function canView($item)  | 
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| 358 | |||
| 359 | /**  | 
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| 360 | * Configure if it's possible to add new items  | 
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| 361 | *  | 
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| 362 | * @return bool  | 
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| 363 | */  | 
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| 364 | 1 | public function canExport()  | 
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| 368 | |||
| 369 | /**  | 
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| 370 | * @param string $name The field name  | 
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| 371 | * @param string $header The header title  | 
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| 372 | * @param bool $sort Sortable column or not  | 
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| 373 | * @param string $template The template  | 
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| 374 | * @param FieldAlias $alias The alias  | 
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| 375 | *  | 
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| 376 | * @return AbstractAdminListConfigurator  | 
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| 377 | */  | 
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| 378 | 8 | public function addField($name, $header, $sort, $template = null, FieldAlias $alias = null)  | 
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| 384 | |||
| 385 | /**  | 
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| 386 | * @param string $name The field name  | 
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| 387 | * @param string $header The header title  | 
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| 388 | * @param string $template The template  | 
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| 389 | * @param FieldAlias $alias The alias  | 
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| 390 | *  | 
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| 391 | * @return AbstractAdminListConfigurator  | 
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| 392 | */  | 
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| 393 | 1 | public function addExportField($name, $header, $template = null, FieldAlias $alias = null)  | 
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| 399 | |||
| 400 | /**  | 
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| 401 | * @param string $columnName The column name  | 
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| 402 | * @param FilterTypeInterface $type The filter type  | 
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| 403 | * @param string $filterName The name of the filter  | 
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| 404 | * @param array $options Options  | 
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| 405 | *  | 
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| 406 | * @return AbstractAdminListConfigurator  | 
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| 407 | */  | 
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| 408 | 5 | public function addFilter(  | 
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| 418 | |||
| 419 | /**  | 
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| 420 | * @return int  | 
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| 421 | */  | 
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| 422 | 3 | public function getLimit()  | 
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| 426 | |||
| 427 | /**  | 
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| 428 | * @return array  | 
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| 429 | */  | 
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| 430 | 1 | public function getSortFields()  | 
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| 441 | |||
| 442 | /**  | 
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| 443 | * @return Field[]  | 
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| 444 | */  | 
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| 445 | 9 | public function getFields()  | 
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| 449 | |||
| 450 | /**  | 
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| 451 | * @return Field[]  | 
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| 452 | */  | 
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| 453 | 2 | public function getExportFields()  | 
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| 461 | |||
| 462 | /**  | 
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| 463 | * @param string $label The label, only used when the template equals null  | 
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| 464 | * @param callable $routeGenerator The generator used to generate the url of an item, when generating the item will  | 
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| 465 | * be provided  | 
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| 466 | * @param string $icon The icon, only used when the template equals null  | 
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| 467 | * @param string $template The template, when not specified the label is shown  | 
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| 468 | *  | 
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| 469 | * @return AbstractAdminListConfigurator  | 
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| 470 | */  | 
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| 471 | 1 | public function addSimpleItemAction($label, $routeGenerator, $icon, $template = null)  | 
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| 475 | |||
| 476 | /**  | 
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| 477 | * @param ItemActionInterface $itemAction  | 
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| 478 | *  | 
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| 479 | * @return AbstractAdminListConfigurator  | 
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| 480 | */  | 
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| 481 | 4 | public function addItemAction(ItemActionInterface $itemAction)  | 
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| 487 | |||
| 488 | /**  | 
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| 489 | * @return bool  | 
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| 490 | */  | 
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| 491 | 1 | public function hasItemActions()  | 
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| 495 | |||
| 496 | /**  | 
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| 497 | * @return ItemActionInterface[]  | 
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| 498 | */  | 
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| 499 | 3 | public function getItemActions()  | 
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| 503 | |||
| 504 | /**  | 
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| 505 | * @param ListActionInterface $listAction  | 
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| 506 | *  | 
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| 507 | * @return AdminListConfiguratorInterface  | 
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| 508 | */  | 
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| 509 | 1 | public function addListAction(ListActionInterface $listAction)  | 
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| 515 | |||
| 516 | /**  | 
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| 517 | * @return bool  | 
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| 518 | */  | 
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| 519 | 1 | public function hasListActions()  | 
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| 523 | |||
| 524 | /**  | 
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| 525 | * @return ListActionInterface[]  | 
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| 526 | */  | 
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| 527 | 1 | public function getListActions()  | 
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| 531 | |||
| 532 | /**  | 
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| 533 | * @param BulkActionInterface $bulkAction  | 
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| 534 | *  | 
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| 535 | * @return AdminListConfiguratorInterface  | 
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| 536 | */  | 
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| 537 | 1 | public function addBulkAction(BulkActionInterface $bulkAction)  | 
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| 543 | |||
| 544 | /**  | 
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| 545 | * @return bool  | 
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| 546 | */  | 
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| 547 | 1 | public function hasBulkActions()  | 
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| 551 | |||
| 552 | /**  | 
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| 553 | * @return BulkActionInterface[]  | 
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| 554 | */  | 
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| 555 | 1 | public function getBulkActions()  | 
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| 559 | |||
| 560 | /**  | 
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| 561 | * @return string  | 
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| 562 | */  | 
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| 563 | 2 | public function getListTemplate()  | 
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| 567 | |||
| 568 | /**  | 
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| 569 | * @param string $template  | 
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| 570 | *  | 
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| 571 | * @return AdminListConfiguratorInterface  | 
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| 572 | */  | 
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| 573 | 1 | public function setListTemplate($template)  | 
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| 579 | |||
| 580 | /**  | 
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| 581 | * @param array|object $item The item  | 
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| 582 | * @param string $columnName The column name  | 
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| 583 | *  | 
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| 584 | * @return mixed  | 
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| 585 | */  | 
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| 586 | 2 | public function getValue($item, $columnName)  | 
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| 606 | |||
| 607 | /**  | 
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| 608 | * @param array|object $item The item  | 
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| 609 | * @param string $columnName The column name  | 
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| 610 | *  | 
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| 611 | * @return string  | 
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| 612 | */  | 
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| 613 | 1 | public function getStringValue($item, $columnName)  | 
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| 642 | |||
| 643 | /**  | 
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| 644 | * @return string  | 
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| 645 | */  | 
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| 646 | 1 | public function getAddTemplate()  | 
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| 650 | |||
| 651 | /**  | 
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| 652 | * @param string $template  | 
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| 653 | *  | 
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| 654 | * @return AdminListConfiguratorInterface  | 
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| 655 | */  | 
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| 656 | 1 | public function setAddTemplate($template)  | 
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| 662 | |||
| 663 | /**  | 
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| 664 | * @return string  | 
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| 665 | */  | 
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| 666 | 1 | public function getViewTemplate()  | 
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| 670 | |||
| 671 | /**  | 
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| 672 | * @param string $template  | 
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| 673 | *  | 
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| 674 | * @return AdminListConfiguratorInterface  | 
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| 675 | */  | 
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| 676 | 1 | public function setViewTemplate($template)  | 
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| 682 | |||
| 683 | /**  | 
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| 684 | * @return string  | 
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| 685 | */  | 
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| 686 | 1 | public function getEditTemplate()  | 
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| 690 | |||
| 691 | /**  | 
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| 692 | * @param string $template  | 
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| 693 | *  | 
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| 694 | * @return AdminListConfiguratorInterface  | 
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| 695 | */  | 
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| 696 | 1 | public function setEditTemplate($template)  | 
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| 702 | |||
| 703 | /**  | 
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| 704 | * @return string  | 
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| 705 | */  | 
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| 706 | 1 | public function getDeleteTemplate()  | 
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| 710 | |||
| 711 | /**  | 
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| 712 | * @param string $template  | 
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| 713 | *  | 
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| 714 | * @return AdminListConfiguratorInterface  | 
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| 715 | */  | 
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| 716 | 1 | public function setDeleteTemplate($template)  | 
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| 722 | |||
| 723 | /**  | 
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| 724 | * You can override this method to do some custom things you need to do when adding an entity  | 
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| 725 | *  | 
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| 726 | * @param object $entity  | 
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| 727 | *  | 
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| 728 | * @return mixed  | 
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| 729 | */  | 
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| 730 | 1 | public function decorateNewEntity($entity)  | 
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| 734 | |||
| 735 | /**  | 
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| 736 | * @return FilterBuilder  | 
            ||
| 737 | */  | 
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| 738 | 10 | public function getFilterBuilder()  | 
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| 746 | |||
| 747 | /**  | 
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| 748 | * @param FilterBuilder $filterBuilder  | 
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| 749 | *  | 
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| 750 | * @return AbstractAdminListConfigurator  | 
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| 751 | */  | 
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| 752 | 2 | public function setFilterBuilder(FilterBuilder $filterBuilder)  | 
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| 758 | |||
| 759 | /**  | 
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| 760 | * Bind current request.  | 
            ||
| 761 | *  | 
            ||
| 762 | * @param Request $request  | 
            ||
| 763 | */  | 
            ||
| 764 | 4 | public function bindRequest(Request $request)  | 
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| 804 | |||
| 805 | /**  | 
            ||
| 806 | * Return current page.  | 
            ||
| 807 | *  | 
            ||
| 808 | * @return int  | 
            ||
| 809 | */  | 
            ||
| 810 | 3 | public function getPage()  | 
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| 814 | |||
| 815 | /**  | 
            ||
| 816 | * Return current sorting column.  | 
            ||
| 817 | *  | 
            ||
| 818 | * @return string  | 
            ||
| 819 | */  | 
            ||
| 820 | 1 | public function getOrderBy()  | 
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| 824 | |||
| 825 | /**  | 
            ||
| 826 | * Return current sorting direction.  | 
            ||
| 827 | *  | 
            ||
| 828 | * @return string  | 
            ||
| 829 | */  | 
            ||
| 830 | 1 | public function getOrderDirection()  | 
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| 834 | |||
| 835 | /**  | 
            ||
| 836 | * @param string $suffix  | 
            ||
| 837 | *  | 
            ||
| 838 | * @return string  | 
            ||
| 839 | */  | 
            ||
| 840 | 9 | public function getPathByConvention($suffix = null)  | 
            |
| 850 | |||
| 851 | /**  | 
            ||
| 852 | * Get controller path.  | 
            ||
| 853 | *  | 
            ||
| 854 | * @return string  | 
            ||
| 855 | */  | 
            ||
| 856 | 1 | public function getControllerPath()  | 
            |
| 860 | |||
| 861 | /**  | 
            ||
| 862 | * Return extra parameters for use in list actions.  | 
            ||
| 863 | *  | 
            ||
| 864 | * @return array  | 
            ||
| 865 | */  | 
            ||
| 866 | 9 | public function getExtraParameters()  | 
            |
| 870 | }  | 
            ||
| 871 | 
This check looks for the generic type
arrayas a return type and suggests a more specific type. This type is inferred from the actual code.