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 Simple 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 Simple, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
||
| 43 | class Simple |
||
| 44 | { |
||
| 45 | |||
| 46 | /** |
||
| 47 | * The actions unique serial. |
||
| 48 | * |
||
| 49 | * @var string |
||
| 50 | */ |
||
| 51 | protected $serial; |
||
| 52 | |||
| 53 | /** |
||
| 54 | * The system logger implementation. |
||
| 55 | * |
||
| 56 | * @var \Psr\Log\LoggerInterface |
||
| 57 | */ |
||
| 58 | protected $systemLogger; |
||
| 59 | |||
| 60 | /** |
||
| 61 | * The RegistryProcessor instance to handle running threads. |
||
| 62 | * |
||
| 63 | * @var \TechDivision\Import\Services\RegistryProcessorInterface |
||
| 64 | */ |
||
| 65 | protected $registryProcessor; |
||
| 66 | |||
| 67 | /** |
||
| 68 | * The processor to read/write the necessary import data. |
||
| 69 | * |
||
| 70 | * @var \TechDivision\Import\Services\ImportProcessorInterface |
||
| 71 | */ |
||
| 72 | protected $importProcessor; |
||
| 73 | |||
| 74 | /** |
||
| 75 | * The system configuration. |
||
| 76 | * |
||
| 77 | * @var \TechDivision\Import\ConfigurationInterface |
||
| 78 | */ |
||
| 79 | protected $configuration; |
||
| 80 | |||
| 81 | /** |
||
| 82 | * Set's the unique serial for this import process. |
||
| 83 | * |
||
| 84 | * @param string $serial The unique serial |
||
| 85 | * |
||
| 86 | * @return void |
||
| 87 | */ |
||
| 88 | public function setSerial($serial) |
||
| 92 | |||
| 93 | /** |
||
| 94 | * Return's the unique serial for this import process. |
||
| 95 | * |
||
| 96 | * @return string The unique serial |
||
| 97 | */ |
||
| 98 | public function getSerial() |
||
| 102 | |||
| 103 | /** |
||
| 104 | * Set's the system logger. |
||
| 105 | * |
||
| 106 | * @param \Psr\Log\LoggerInterface $systemLogger The system logger |
||
| 107 | * |
||
| 108 | * @return void |
||
| 109 | */ |
||
| 110 | public function setSystemLogger(LoggerInterface $systemLogger) |
||
| 114 | |||
| 115 | /** |
||
| 116 | * Return's the system logger. |
||
| 117 | * |
||
| 118 | * @return \Psr\Log\LoggerInterface The system logger instance |
||
| 119 | */ |
||
| 120 | public function getSystemLogger() |
||
| 124 | |||
| 125 | /** |
||
| 126 | * Sets's the RegistryProcessor instance to handle the running threads. |
||
| 127 | * |
||
| 128 | * @param \TechDivision\Import\Services\RegistryProcessorInterface $registryProcessor The registry processor instance |
||
| 129 | * |
||
| 130 | * @return void |
||
| 131 | */ |
||
| 132 | public function setRegistryProcessor(RegistryProcessorInterface $registryProcessor) |
||
| 136 | |||
| 137 | /** |
||
| 138 | * Return's the RegistryProcessor instance to handle the running threads. |
||
| 139 | * |
||
| 140 | * @return \TechDivision\Import\Services\RegistryProcessor The registry processor instance |
||
| 141 | */ |
||
| 142 | public function getRegistryProcessor() |
||
| 146 | |||
| 147 | /** |
||
| 148 | * Set's the import processor instance. |
||
| 149 | * |
||
| 150 | * @param \TechDivision\Import\Services\ImportProcessorInterface $importProcessor The import processor instance |
||
| 151 | * |
||
| 152 | * @return void |
||
| 153 | */ |
||
| 154 | 1 | public function setImportProcessor(ImportProcessorInterface $importProcessor) |
|
| 158 | |||
| 159 | /** |
||
| 160 | * Return's the import processor instance. |
||
| 161 | * |
||
| 162 | * @return \TechDivision\Import\Services\ImportProcessorInterface The import processor instance |
||
| 163 | */ |
||
| 164 | 1 | public function getImportProcessor() |
|
| 168 | |||
| 169 | /** |
||
| 170 | * Set's the system configuration. |
||
| 171 | * |
||
| 172 | * @param \TechDivision\Import\ConfigurationInterface $configuration The system configuration |
||
| 173 | * |
||
| 174 | * @return void |
||
| 175 | */ |
||
| 176 | public function setConfiguration(ConfigurationInterface $configuration) |
||
| 180 | |||
| 181 | /** |
||
| 182 | * Return's the system configuration. |
||
| 183 | * |
||
| 184 | * @return \TechDivision\Import\ConfigurationInterface The system configuration |
||
| 185 | */ |
||
| 186 | public function getConfiguration() |
||
| 190 | |||
| 191 | /** |
||
| 192 | * Return's the prefix for the import files. |
||
| 193 | * |
||
| 194 | * @return string The prefix |
||
| 195 | */ |
||
| 196 | protected function getPrefix() |
||
| 200 | |||
| 201 | /** |
||
| 202 | * Return's the source directory that has to be watched for new files. |
||
| 203 | * |
||
| 204 | * @return string The source directory |
||
| 205 | */ |
||
| 206 | protected function getSourceDir() |
||
| 210 | |||
| 211 | /** |
||
| 212 | * Parse the temporary upload directory for new files to be imported. |
||
| 213 | * |
||
| 214 | * @return void |
||
| 215 | * @throws \Exception Is thrown, if the import process can't be finished successfully |
||
| 216 | */ |
||
| 217 | public function import() |
||
| 259 | |||
| 260 | /** |
||
| 261 | * This method start's the import process by initializing |
||
| 262 | * the status and appends it to the registry. |
||
| 263 | * |
||
| 264 | * @return void |
||
| 265 | */ |
||
| 266 | protected function start() |
||
| 287 | |||
| 288 | /** |
||
| 289 | * Prepares the global data for the import process. |
||
| 290 | * |
||
| 291 | * @return void |
||
| 292 | */ |
||
| 293 | protected function setUp() |
||
| 356 | |||
| 357 | /** |
||
| 358 | * Process all the subjects defined in the system configuration. |
||
| 359 | * |
||
| 360 | * @return void |
||
| 361 | * @throws \Exception Is thrown, if one of the subjects can't be processed |
||
| 362 | */ |
||
| 363 | protected function processSubjects() |
||
| 393 | |||
| 394 | /** |
||
| 395 | * Process the subject with the passed name/identifier. |
||
| 396 | * |
||
| 397 | * We create a new, fresh and separate subject for EVERY file here, because this would be |
||
| 398 | * the starting point to parallelize the import process in a multithreaded/multiprocessed |
||
| 399 | * environment. |
||
| 400 | * |
||
| 401 | * @param \TechDivision\Import\Configuration\Subject $subject The subject configuration |
||
| 402 | * |
||
| 403 | * @return void |
||
| 404 | * @throws \Exception Is thrown, if the subject can't be processed |
||
| 405 | */ |
||
| 406 | protected function processSubject($subject) |
||
| 439 | |||
| 440 | /** |
||
| 441 | * Factory method to create new handler instances. |
||
| 442 | * |
||
| 443 | * @param \TechDivision\Import\Configuration\Subject $subject The subject configuration |
||
| 444 | * |
||
| 445 | * @return object The handler instance |
||
| 446 | */ |
||
| 447 | public function subjectFactory($subject) |
||
| 477 | |||
| 478 | /** |
||
| 479 | * Lifecycle callback that will be inovked after the |
||
| 480 | * import process has been finished. |
||
| 481 | * |
||
| 482 | * @return void |
||
| 483 | * @throws \Exception Is thrown, if the |
||
| 484 | */ |
||
| 485 | protected function archive() |
||
| 549 | |||
| 550 | /** |
||
| 551 | * Removes the passed directory recursively. |
||
| 552 | * |
||
| 553 | * @param string $src Name of the directory to remove |
||
| 554 | * |
||
| 555 | * @return void |
||
| 556 | */ |
||
| 557 | protected function removeDir($src) |
||
| 579 | |||
| 580 | /** |
||
| 581 | * Lifecycle callback that will be inovked after the |
||
| 582 | * import process has been finished. |
||
| 583 | * |
||
| 584 | * @return void |
||
| 585 | * @throws \Exception Is thrown, if the |
||
| 586 | */ |
||
| 587 | protected function tearDown() |
||
| 590 | |||
| 591 | /** |
||
| 592 | * This method finishes the import process and cleans the registry. |
||
| 593 | * |
||
| 594 | * @return void |
||
| 595 | */ |
||
| 596 | protected function finish() |
||
| 600 | } |
||
| 601 |
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.