phpMv /
phpMv-UI
Complex classes like DataTable 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 DataTable, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 25 | class DataTable extends Widget { |
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| 26 | use TableTrait,DataTableFieldAsTrait,HasCheckboxesTrait; |
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| 27 | protected $_searchField; |
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| 28 | protected $_urls; |
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| 29 | protected $_pagination; |
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| 30 | protected $_compileParts; |
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| 31 | protected $_deleteBehavior; |
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| 32 | protected $_editBehavior; |
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| 33 | protected $_visibleHover=false; |
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| 34 | protected $_targetSelector; |
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| 35 | protected $_refreshSelector; |
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| 36 | protected $_emptyMessage; |
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| 37 | protected $_json; |
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| 38 | protected $_rowClass=""; |
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| 39 | |||
| 40 | |||
| 41 | public function __construct($identifier,$model,$modelInstance=NULL) { |
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| 48 | |||
| 49 | public function run(JsUtils $js){ |
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| 63 | |||
| 64 | |||
| 65 | |||
| 66 | protected function _generateBehavior($op,$params,JsUtils $js){ |
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| 72 | |||
| 73 | /** |
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| 74 | * {@inheritDoc} |
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| 75 | * @see \Ajax\semantic\html\collections\table\TableTrait::getTable() |
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| 76 | */ |
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| 77 | protected function getTable() { |
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| 80 | |||
| 81 | |||
| 82 | public function compile(JsUtils $js=NULL,&$view=NULL){ |
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| 123 | |||
| 124 | |||
| 125 | |||
| 126 | protected function _generateContent($table){ |
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| 141 | |||
| 142 | protected function _generateRow($instance,&$table,$checkedClass=null){ |
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| 161 | |||
| 162 | protected function _generatePagination($table,$js=NULL){ |
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| 175 | |||
| 176 | protected function _associatePaginationBehavior(HtmlMenu $menu,JsUtils $js=NULL){ |
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| 181 | |||
| 182 | protected function _getFieldName($index){ |
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| 185 | |||
| 186 | protected function _getFieldCaption($index){ |
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| 189 | |||
| 190 | protected function _setToolbarPosition($table,$captions=NULL){ |
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| 205 | |||
| 206 | /** |
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| 207 | * Associates a $callback function after the compilation of the field at $index position |
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| 208 | * The $callback function can take the following arguments : $field=>the compiled field, $instance : the active instance of the object, $index: the field position |
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| 209 | * @param int $index postion of the compiled field |
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| 210 | * @param callable $callback function called after the field compilation |
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| 211 | * @return DataTable |
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| 212 | */ |
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| 213 | public function afterCompile($index,$callback){ |
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| 217 | |||
| 218 | private function addToolbarRow($part,$table,$captions){ |
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| 228 | |||
| 229 | public function getHtmlComponent(){ |
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| 232 | |||
| 233 | public function getUrls() { |
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| 236 | |||
| 237 | /** |
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| 238 | * Sets the associative array of urls for refreshing, updating or deleting |
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| 239 | * @param string|array $urls associative array with keys refresh: for refreshing with search field or pagination, edit : for updating a row, delete: for deleting a row |
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| 240 | * @return DataTable |
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| 241 | */ |
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| 242 | public function setUrls($urls) { |
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| 252 | |||
| 253 | /** |
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| 254 | * Paginates the DataTable element with a Semantic HtmlPaginationMenu component |
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| 255 | * @param number $page the active page number |
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| 256 | * @param number $total_rowcount the total number of items |
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| 257 | * @param number $items_per_page The number of items per page |
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| 258 | * @param number $pages_visibles The number of visible pages in the Pagination component |
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| 259 | * @return DataTable |
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| 260 | */ |
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| 261 | public function paginate($page,$total_rowcount,$items_per_page=10,$pages_visibles=null){ |
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| 265 | |||
| 266 | /** |
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| 267 | * Auto Paginates the DataTable element with a Semantic HtmlPaginationMenu component |
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| 268 | * @param number $page the active page number |
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| 269 | * @param number $items_per_page The number of items per page |
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| 270 | * @param number $pages_visibles The number of visible pages in the Pagination component |
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| 271 | * @return DataTable |
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| 272 | */ |
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| 273 | public function autoPaginate($page=1,$items_per_page=10,$pages_visibles=4){ |
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| 277 | |||
| 278 | |||
| 279 | |||
| 280 | /** |
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| 281 | * @param array $compileParts |
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| 282 | * @return DataTable |
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| 283 | */ |
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| 284 | public function refresh($compileParts=["tbody"]){ |
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| 288 | |||
| 289 | |||
| 290 | public function addSearchInToolbar($position=Direction::RIGHT){ |
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| 293 | |||
| 294 | public function getSearchField(){ |
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| 301 | |||
| 302 | /** |
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| 303 | * The callback function called after the insertion of each row when fromDatabaseObjects is called |
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| 304 | * callback function takes the parameters $row : the row inserted and $object: the instance of model used |
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| 305 | * @param callable $callback |
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| 306 | * @return DataTable |
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| 307 | */ |
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| 308 | public function onNewRow($callback) { |
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| 312 | |||
| 313 | public function asForm(){ |
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| 316 | |||
| 317 | |||
| 318 | |||
| 319 | protected function getTargetSelector() { |
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| 325 | |||
| 326 | /** |
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| 327 | * Sets the response element selector for Edit and Delete request with ajax |
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| 328 | * @param string $_targetSelector |
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| 329 | * @return \Ajax\semantic\widgets\datatable\DataTable |
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| 330 | */ |
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| 331 | public function setTargetSelector($_targetSelector) { |
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| 335 | |||
| 336 | public function getRefreshSelector() { |
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| 341 | |||
| 342 | public function setRefreshSelector($_refreshSelector) { |
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| 346 | |||
| 347 | public function show($modelInstance){ |
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| 354 | |||
| 355 | public function getRowClass() { |
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| 358 | |||
| 359 | /** |
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| 360 | * Sets the default row class (tr class) |
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| 361 | * @param string $_rowClass |
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| 362 | * @return DataTable |
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| 363 | */ |
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| 364 | public function setRowClass($_rowClass) { |
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| 368 | |||
| 369 | /** |
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| 370 | * Sets the message displayed when there is no record |
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| 371 | * @param mixed $_emptyMessage |
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| 372 | * @return DataTable |
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| 373 | */ |
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| 374 | public function setEmptyMessage($_emptyMessage) { |
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| 378 | |||
| 379 | |||
| 380 | |||
| 381 | } |
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: