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 Connection 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 Connection, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 8 | class Connection extends \Illuminate\Database\Connection |
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| 9 | { |
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| 10 | const DEFAULT_PAGE_SIZE = 5000; |
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| 11 | |||
| 12 | /** |
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| 13 | * The Cassandra keyspace |
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| 14 | * |
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| 15 | * @var string |
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| 16 | */ |
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| 17 | protected $keyspace; |
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| 18 | |||
| 19 | /** |
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| 20 | * The Cassandra cluster |
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| 21 | * |
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| 22 | * @var \Cassandra\Cluster |
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| 23 | */ |
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| 24 | protected $cluster; |
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| 25 | |||
| 26 | /** |
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| 27 | * The Cassandra connection handler. |
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| 28 | * |
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| 29 | * @var \Cassandra\Session |
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| 30 | */ |
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| 31 | protected $session; |
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| 32 | |||
| 33 | /** |
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| 34 | * The config |
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| 35 | * |
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| 36 | * @var array |
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| 37 | */ |
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| 38 | protected $config; |
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| 39 | |||
| 40 | /** |
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| 41 | * Create a new database connection instance. |
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| 42 | * |
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| 43 | * @param array $config |
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| 44 | */ |
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| 45 | public function __construct(array $config) |
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| 71 | |||
| 72 | /** |
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| 73 | * Begin a fluent query against a database table. |
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| 74 | * |
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| 75 | * @param string $table |
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| 76 | * @return Query\Builder |
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| 77 | */ |
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| 78 | public function table($table) |
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| 86 | |||
| 87 | /** |
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| 88 | * return Cassandra cluster. |
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| 89 | * |
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| 90 | * @return \Cassandra\Cluster |
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| 91 | */ |
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| 92 | public function getCassandraCluster() |
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| 96 | |||
| 97 | /** |
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| 98 | * return Cassandra Session. |
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| 99 | * |
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| 100 | * @return \Cassandra\Session |
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| 101 | */ |
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| 102 | public function getCassandraSession() |
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| 106 | |||
| 107 | /** |
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| 108 | * Return the Cassandra keyspace |
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| 109 | * |
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| 110 | * @return string |
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| 111 | */ |
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| 112 | public function getKeyspace() |
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| 116 | |||
| 117 | /** |
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| 118 | * Create a new Cassandra cluster object. |
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| 119 | * |
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| 120 | * @param array $config |
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| 121 | * @param array $options |
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| 122 | * @return \Cassandra\Cluster |
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| 123 | */ |
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| 124 | protected function createCluster(array $config, array $options) |
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| 189 | |||
| 190 | /** |
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| 191 | * Disconnect from the underlying Cassandra connection. |
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| 192 | */ |
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| 193 | public function disconnect() |
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| 197 | |||
| 198 | /** |
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| 199 | * Get the PDO driver name. |
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| 200 | * |
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| 201 | * @return string |
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| 202 | */ |
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| 203 | public function getDriverName() |
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| 207 | |||
| 208 | /** |
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| 209 | * Run a select statement against the database. |
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| 210 | * |
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| 211 | * @param string $query |
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| 212 | * @param array $bindings |
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| 213 | * @param bool $useReadPdo |
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| 214 | * @param array $customOptions |
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| 215 | * |
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| 216 | * @return array |
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| 217 | */ |
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| 218 | public function select($query, $bindings = [], $useReadPdo = true, array $customOptions = []) |
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| 233 | |||
| 234 | /** |
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| 235 | * Run an bulk insert statement against the database. |
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| 236 | * |
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| 237 | * @param array $queries |
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| 238 | * @param array $bindings |
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| 239 | * @param int $type |
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| 240 | * @param array $customOptions |
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| 241 | * |
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| 242 | * @return bool |
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| 243 | */ |
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| 244 | public function insertBulk($queries = [], $bindings = [], $type = Cassandra::BATCH_LOGGED, array $customOptions = []) |
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| 248 | |||
| 249 | /** |
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| 250 | * Execute a group of queries inside a batch statement against the database. |
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| 251 | * |
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| 252 | * @param array $queries |
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| 253 | * @param array $bindings |
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| 254 | * @param int $type |
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| 255 | * @param array $customOptions |
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| 256 | * |
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| 257 | * @return bool |
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| 258 | */ |
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| 259 | public function batchStatement($queries = [], $bindings = [], $type = Cassandra::BATCH_LOGGED, array $customOptions = []) |
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| 276 | |||
| 277 | /** |
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| 278 | * Execute an SQL statement and return the boolean result. |
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| 279 | * |
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| 280 | * @param string $query |
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| 281 | * @param array $bindings |
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| 282 | * @param array $customOptions |
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| 283 | * |
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| 284 | * @return bool |
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| 285 | */ |
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| 286 | View Code Duplication | public function statement($query, $bindings = [], array $customOptions = []) |
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| 302 | |||
| 303 | /** |
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| 304 | * Because Cassandra is an eventually consistent database, it's not possible to obtain |
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| 305 | * the affected count for statements so we're just going to return 0, based on the idea |
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| 306 | * that if the query fails somehow, an exception will be thrown |
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| 307 | * |
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| 308 | * @param string $query |
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| 309 | * @param array $bindings |
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| 310 | * @param array $customOptions |
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| 311 | * |
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| 312 | * @return int |
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| 313 | */ |
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| 314 | View Code Duplication | public function affectingStatement($query, $bindings = [], array $customOptions = []) |
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| 332 | |||
| 333 | /** |
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| 334 | * @inheritdoc |
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| 335 | */ |
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| 336 | protected function getDefaultPostProcessor() |
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| 340 | |||
| 341 | /** |
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| 342 | * @inheritdoc |
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| 343 | */ |
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| 344 | protected function getDefaultQueryGrammar() |
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| 348 | |||
| 349 | /** |
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| 350 | * @inheritdoc |
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| 351 | */ |
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| 352 | protected function getDefaultSchemaGrammar() |
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| 356 | |||
| 357 | /** |
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| 358 | * Reconnect to the database if connection is missing. |
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| 359 | * |
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| 360 | * @return void |
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| 361 | */ |
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| 362 | protected function reconnectIfMissingConnection() |
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| 368 | |||
| 369 | /** |
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| 370 | * Dynamically pass methods to the connection. |
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| 371 | * |
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| 372 | * @param string $method |
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| 373 | * @param array $parameters |
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| 374 | * @return mixed |
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| 375 | */ |
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| 376 | public function __call($method, $parameters) |
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| 380 | } |
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| 381 |
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: