Complex classes like FilesystemEntity 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 FilesystemEntity, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 21 | class FilesystemEntity extends AbstractEntity  | 
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| 22 | { | 
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| 23 | public const TYPE_DOCUMENT = 'document';  | 
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| 24 | public const TYPE_BINARY = 'binary';  | 
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| 25 | public const TYPE_DIRECTORY = 'directory';  | 
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| 26 | public const TYPE_SYMLINK = 'symlink';  | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * @var array  | 
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| 30 | */  | 
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| 31 | protected $container = [  | 
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| 32 | 'id_filesystem' => null,  | 
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| 33 | 'fk_application' => null,  | 
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| 34 | 'fk_category' => null,  | 
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| 35 | 'fk_parent_node' => null,  | 
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| 36 | 'fk_filesystem_document' => null,  | 
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| 37 | 'fk_filesystem_file' => null,  | 
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| 38 | 'fk_filesystem_directory' => null,  | 
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| 39 | 'fk_filesystem_link' => null,  | 
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| 40 | 'path' => null,  | 
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| 41 | 'basename' => null,  | 
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| 42 | 'uri' => null,  | 
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| 43 | 'title' => null,  | 
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| 44 | 'description' => null,  | 
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| 45 | 'is_hidden' => null,  | 
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| 46 | 'is_read_only' => null,  | 
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| 47 | 'is_deleted' => null,  | 
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| 48 | 'date_created' => null,  | 
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| 49 | 'date_modified' => null,  | 
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| 50 | 'date_published' => null,  | 
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| 51 | ];  | 
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| 52 | |||
| 53 | /**  | 
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| 54 | * @return null|string  | 
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| 55 | */  | 
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| 56 | public function getType() : ? string  | 
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| 69 | |||
| 70 | /**  | 
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| 71 | * @param int $identifier  | 
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| 72 | * @return FilesystemEntity  | 
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| 73 | */  | 
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| 74 | public function setFilesystemId(int $identifier) : FilesystemEntity  | 
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| 80 | |||
| 81 | /**  | 
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| 82 | * @return int|null  | 
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| 83 | */  | 
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| 84 | public function getFilesystemId() : ? int  | 
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| 90 | |||
| 91 | /**  | 
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| 92 | * @param int $applicationIdentifier  | 
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| 93 | * @return FilesystemEntity  | 
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| 94 | */  | 
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| 95 | public function setApplicationId(int $applicationIdentifier) : FilesystemEntity  | 
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| 101 | |||
| 102 | /**  | 
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| 103 | * @return int|null  | 
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| 104 | */  | 
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| 105 | public function getApplicationId() : ? int  | 
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| 111 | |||
| 112 | /**  | 
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| 113 | * @param int $categoryIdentifier  | 
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| 114 | * @return FilesystemEntity  | 
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| 115 | */  | 
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| 116 | public function setCategoryId(int $categoryIdentifier) : FilesystemEntity  | 
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| 122 | |||
| 123 | /**  | 
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| 124 | * @return int|null  | 
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| 125 | */  | 
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| 126 | public function getCategoryId() : ? int  | 
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| 132 | |||
| 133 | /**  | 
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| 134 | * @param int $parentNodeIdentifier  | 
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| 135 | * @return FilesystemEntity  | 
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| 136 | */  | 
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| 137 | public function setParentNodeId(int $parentNodeIdentifier) : FilesystemEntity  | 
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| 143 | |||
| 144 | /**  | 
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| 145 | * @return int|null  | 
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| 146 | */  | 
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| 147 | public function getParentNodeId() : ? int  | 
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| 153 | |||
| 154 | /**  | 
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| 155 | * @param int $documentIdentifier  | 
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| 156 | * @return FilesystemEntity  | 
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| 157 | */  | 
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| 158 | public function setFilesystemDocumentId(int $documentIdentifier) : FilesystemEntity  | 
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| 164 | |||
| 165 | /**  | 
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| 166 | * @return int|null  | 
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| 167 | */  | 
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| 168 | public function getFilesystemDocumentId() : ? int  | 
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| 174 | |||
| 175 | /**  | 
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| 176 | * @param int $fileIdentifier  | 
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| 177 | * @return FilesystemEntity  | 
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| 178 | */  | 
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| 179 | public function setFilesystemFileId(int $fileIdentifier) : FilesystemEntity  | 
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| 185 | |||
| 186 | /**  | 
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| 187 | * @return int|null  | 
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| 188 | */  | 
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| 189 | public function getFilesystemFileId() : ? int  | 
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| 195 | |||
| 196 | /**  | 
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| 197 | * @param int $directoryIdentifier  | 
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| 198 | * @return FilesystemEntity  | 
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| 199 | */  | 
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| 200 | public function setFilesystemDirectoryId(int $directoryIdentifier) : FilesystemEntity  | 
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| 206 | |||
| 207 | /**  | 
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| 208 | * @return int|null  | 
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| 209 | */  | 
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| 210 | public function getFilesystemDirectoryId() : ? int  | 
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| 216 | |||
| 217 | /**  | 
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| 218 | * @param int $linkIdentifier  | 
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| 219 | * @return FilesystemEntity  | 
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| 220 | */  | 
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| 221 | public function setFilesystemLinkId(int $linkIdentifier) : FilesystemEntity  | 
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| 227 | |||
| 228 | /**  | 
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| 229 | * @return int|null  | 
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| 230 | */  | 
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| 231 | public function getFilesystemLinkId() : ? int  | 
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| 237 | |||
| 238 | /**  | 
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| 239 | * @param string $path  | 
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| 240 | * @return FilesystemEntity  | 
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| 241 | */  | 
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| 242 | public function setPath(string $path) : FilesystemEntity  | 
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| 248 | |||
| 249 | /**  | 
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| 250 | * @return null|string  | 
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| 251 | */  | 
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| 252 | public function getPath() : ? string  | 
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| 256 | |||
| 257 | /**  | 
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| 258 | * @param string $baseName  | 
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| 259 | * @return FilesystemEntity  | 
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| 260 | */  | 
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| 261 | public function setBaseName(string $baseName) : FilesystemEntity  | 
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| 267 | |||
| 268 | /**  | 
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| 269 | * @return null|string  | 
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| 270 | */  | 
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| 271 | public function getBaseName() : ? string  | 
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| 275 | |||
| 276 | /**  | 
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| 277 | * @param string $uri  | 
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| 278 | * @return FilesystemEntity  | 
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| 279 | */  | 
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| 280 | public function setUri(string $uri) : FilesystemEntity  | 
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| 286 | |||
| 287 | /**  | 
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| 288 | * @return null|string  | 
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| 289 | */  | 
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| 290 | public function getUri() : ? string  | 
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| 294 | |||
| 295 | /**  | 
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| 296 | * @param string $title  | 
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| 297 | * @return FilesystemEntity  | 
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| 298 | */  | 
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| 299 | public function setTitle(string $title) : FilesystemEntity  | 
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| 305 | |||
| 306 | /**  | 
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| 307 | * @return null|string  | 
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| 308 | */  | 
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| 309 | public function getTitle() : ? string  | 
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| 313 | |||
| 314 | /**  | 
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| 315 | * @param string $description  | 
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| 316 | * @return FilesystemEntity  | 
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| 317 | */  | 
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| 318 | public function setDescription(string $description) : FilesystemEntity  | 
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| 324 | |||
| 325 | /**  | 
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| 326 | * @return null|string  | 
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| 327 | */  | 
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| 328 | public function getDescription() : ? string  | 
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| 332 | |||
| 333 | /**  | 
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| 334 | * @param bool $isHidden  | 
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| 335 | * @return FilesystemEntity  | 
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| 336 | */  | 
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| 337 | public function setIsHidden(bool $isHidden) : FilesystemEntity  | 
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| 343 | |||
| 344 | /**  | 
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| 345 | * @return bool  | 
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| 346 | */  | 
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| 347 | public function getIsHidden() : bool  | 
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| 351 | |||
| 352 | /**  | 
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| 353 | * @param bool $isReadonly  | 
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| 354 | * @return FilesystemEntity  | 
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| 355 | */  | 
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| 356 | public function setIsReadOnly(bool $isReadonly) : FilesystemEntity  | 
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| 362 | |||
| 363 | /**  | 
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| 364 | * @return bool  | 
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| 365 | */  | 
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| 366 | public function getIsReadOnly() : bool  | 
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| 370 | |||
| 371 | /**  | 
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| 372 | * @param bool $isDeleted  | 
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| 373 | * @return FilesystemEntity  | 
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| 374 | */  | 
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| 375 | public function setIsDeleted(bool $isDeleted) : FilesystemEntity  | 
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| 381 | |||
| 382 | /**  | 
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| 383 | * @return bool  | 
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| 384 | */  | 
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| 385 | public function getIsDeleted() : bool  | 
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| 389 | |||
| 390 | /**  | 
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| 391 | * @param DateTime $dateTime  | 
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| 392 | * @return FilesystemEntity  | 
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| 393 | */  | 
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| 394 | public function setDateCreated(DateTime $dateTime) : FilesystemEntity  | 
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| 400 | |||
| 401 | /**  | 
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| 402 | * @return null|DateTime  | 
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| 403 | */  | 
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| 404 | public function getDateCreated() : ? DateTime  | 
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| 410 | |||
| 411 | /**  | 
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| 412 | * @param DateTime $dateTime  | 
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| 413 | * @return FilesystemEntity  | 
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| 414 | */  | 
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| 415 | public function setDateModified(DateTime $dateTime) : FilesystemEntity  | 
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| 421 | |||
| 422 | /**  | 
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| 423 | * @return null|DateTime  | 
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| 424 | */  | 
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| 425 | public function getDateModified() : ? DateTime  | 
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| 431 | |||
| 432 | /**  | 
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| 433 | * @param DateTime $dateTime  | 
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| 434 | * @return FilesystemEntity  | 
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| 435 | */  | 
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| 436 | public function setDatePublished(DateTime $dateTime) : FilesystemEntity  | 
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| 442 | |||
| 443 | /**  | 
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| 444 | * @return null|DateTime  | 
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| 445 | */  | 
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| 446 | public function getDatePublished() : ? DateTime  | 
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| 452 | }  | 
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| 453 |