Complex classes like Table 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 Table, and based on these observations, apply Extract Interface, too.
1 | <?php |
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19 | class Table extends AbstractAsset |
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20 | { |
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21 | /** @var Column[] */ |
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22 | protected $_columns = []; |
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23 | |||
24 | /** @var Index[] */ |
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25 | private $implicitIndexes = []; |
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26 | |||
27 | /** @var Index[] */ |
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28 | protected $_indexes = []; |
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29 | |||
30 | /** @var string */ |
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31 | protected $_primaryKeyName = false; |
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32 | |||
33 | /** @var ForeignKeyConstraint[] */ |
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34 | protected $_fkConstraints = []; |
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35 | |||
36 | /** @var mixed[] */ |
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37 | protected $_options = [ |
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38 | 'create_options' => [], |
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39 | ]; |
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40 | |||
41 | /** @var SchemaConfig|null */ |
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42 | protected $_schemaConfig = null; |
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43 | |||
44 | /** |
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45 | * @param string $tableName |
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46 | * @param Column[] $columns |
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47 | * @param Index[] $indexes |
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48 | * @param ForeignKeyConstraint[] $fkConstraints |
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49 | * @param int $idGeneratorType |
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50 | * @param mixed[] $options |
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51 | * |
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52 | * @throws DBALException |
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53 | */ |
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54 | 22007 | public function __construct($tableName, array $columns = [], array $indexes = [], array $fkConstraints = [], $idGeneratorType = 0, array $options = []) |
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76 | |||
77 | /** |
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78 | * @return void |
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79 | */ |
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80 | 20798 | public function setSchemaConfig(SchemaConfig $schemaConfig) |
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84 | |||
85 | /** |
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86 | * @return int |
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87 | */ |
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88 | 20973 | protected function _getMaxIdentifierLength() |
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96 | |||
97 | /** |
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98 | * Sets the Primary Key. |
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99 | * |
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100 | * @param string[] $columnNames |
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101 | * @param string|false $indexName |
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102 | * |
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103 | * @return self |
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104 | */ |
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105 | 21463 | public function setPrimaryKey(array $columnNames, $indexName = false) |
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116 | |||
117 | /** |
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118 | * @param string[] $columnNames |
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119 | * @param string|null $indexName |
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120 | * @param string[] $flags |
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121 | * @param mixed[] $options |
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122 | * |
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123 | * @return self |
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124 | */ |
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125 | 19724 | public function addIndex(array $columnNames, $indexName = null, array $flags = [], array $options = []) |
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137 | |||
138 | /** |
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139 | * Drops the primary key from this table. |
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140 | * |
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141 | * @return void |
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142 | */ |
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143 | 18392 | public function dropPrimaryKey() |
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148 | |||
149 | /** |
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150 | * Drops an index from this table. |
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151 | * |
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152 | * @param string $indexName The index name. |
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153 | * |
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154 | * @return void |
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155 | * |
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156 | * @throws SchemaException If the index does not exist. |
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157 | */ |
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158 | 18416 | public function dropIndex($indexName) |
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167 | |||
168 | /** |
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169 | * @param string[] $columnNames |
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170 | * @param string|null $indexName |
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171 | * @param mixed[] $options |
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172 | * |
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173 | * @return self |
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174 | */ |
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175 | 20678 | public function addUniqueIndex(array $columnNames, $indexName = null, array $options = []) |
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187 | |||
188 | /** |
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189 | * Renames an index. |
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190 | * |
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191 | * @param string $oldIndexName The name of the index to rename from. |
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192 | * @param string|null $newIndexName The name of the index to rename to. |
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193 | * If null is given, the index name will be auto-generated. |
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194 | * |
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195 | * @return self This table instance. |
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196 | * |
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197 | * @throws SchemaException If no index exists for the given current name |
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198 | * or if an index with the given new name already exists on this table. |
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199 | */ |
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200 | 19052 | public function renameIndex($oldIndexName, $newIndexName = null) |
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233 | |||
234 | /** |
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235 | * Checks if an index begins in the order of the given columns. |
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236 | * |
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237 | * @param string[] $columnNames |
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238 | * |
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239 | * @return bool |
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240 | */ |
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241 | 19226 | public function columnsAreIndexed(array $columnNames) |
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251 | |||
252 | /** |
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253 | * @param string[] $columnNames |
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254 | * @param string $indexName |
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255 | * @param bool $isUnique |
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256 | * @param bool $isPrimary |
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257 | * @param string[] $flags |
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258 | * @param mixed[] $options |
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259 | * |
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260 | * @return Index |
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261 | * |
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262 | * @throws SchemaException |
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263 | */ |
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264 | 21612 | private function _createIndex(array $columnNames, $indexName, $isUnique, $isPrimary, array $flags = [], array $options = []) |
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278 | |||
279 | /** |
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280 | * @param string $columnName |
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281 | * @param string $typeName |
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282 | * @param mixed[] $options |
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283 | * |
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284 | * @return Column |
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285 | */ |
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286 | 21829 | public function addColumn($columnName, $typeName, array $options = []) |
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294 | |||
295 | /** |
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296 | * Renames a Column. |
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297 | * |
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298 | * @deprecated |
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299 | * |
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300 | * @param string $oldColumnName |
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301 | * @param string $newColumnName |
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302 | * |
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303 | * @return void |
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304 | * |
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305 | * @throws DBALException |
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306 | */ |
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307 | public function renameColumn($oldColumnName, $newColumnName) |
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313 | |||
314 | /** |
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315 | * Change Column Details. |
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316 | * |
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317 | * @param string $columnName |
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318 | * @param mixed[] $options |
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319 | * |
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320 | * @return self |
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321 | */ |
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322 | 18890 | public function changeColumn($columnName, array $options) |
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329 | |||
330 | /** |
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331 | * Drops a Column from the Table. |
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332 | * |
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333 | * @param string $columnName |
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334 | * |
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335 | * @return self |
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336 | */ |
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337 | 1325 | public function dropColumn($columnName) |
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344 | |||
345 | /** |
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346 | * Adds a foreign key constraint. |
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347 | * |
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348 | * Name is inferred from the local columns. |
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349 | * |
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350 | * @param Table|string $foreignTable Table schema instance or table name |
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351 | * @param string[] $localColumnNames |
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352 | * @param string[] $foreignColumnNames |
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353 | * @param mixed[] $options |
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354 | * @param string|null $constraintName |
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355 | * |
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356 | * @return self |
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357 | */ |
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358 | 20916 | public function addForeignKeyConstraint($foreignTable, array $localColumnNames, array $foreignColumnNames, array $options = [], $constraintName = null) |
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364 | |||
365 | /** |
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366 | * Adds a foreign key constraint. |
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367 | * |
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368 | * Name is to be generated by the database itself. |
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369 | * |
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370 | * @deprecated Use {@link addForeignKeyConstraint} |
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371 | * |
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372 | * @param Table|string $foreignTable Table schema instance or table name |
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373 | * @param string[] $localColumnNames |
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374 | * @param string[] $foreignColumnNames |
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375 | * @param mixed[] $options |
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376 | * |
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377 | * @return self |
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378 | */ |
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379 | 14891 | public function addUnnamedForeignKeyConstraint($foreignTable, array $localColumnNames, array $foreignColumnNames, array $options = []) |
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383 | |||
384 | /** |
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385 | * Adds a foreign key constraint with a given name. |
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386 | * |
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387 | * @deprecated Use {@link addForeignKeyConstraint} |
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388 | * |
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389 | * @param string $name |
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390 | * @param Table|string $foreignTable Table schema instance or table name |
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391 | * @param string[] $localColumnNames |
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392 | * @param string[] $foreignColumnNames |
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393 | * @param mixed[] $options |
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394 | * |
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395 | * @return self |
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396 | * |
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397 | * @throws SchemaException |
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398 | */ |
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399 | 20917 | public function addNamedForeignKeyConstraint($name, $foreignTable, array $localColumnNames, array $foreignColumnNames, array $options = []) |
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426 | |||
427 | /** |
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428 | * @param string $name |
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429 | * @param mixed $value |
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430 | * |
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431 | * @return self |
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432 | */ |
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433 | 20158 | public function addOption($name, $value) |
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439 | |||
440 | /** |
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441 | * @return void |
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442 | * |
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443 | * @throws SchemaException |
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444 | */ |
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445 | 21881 | protected function _addColumn(Column $column) |
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456 | |||
457 | /** |
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458 | * Adds an index to the table. |
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459 | * |
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460 | * @return self |
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461 | * |
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462 | * @throws SchemaException |
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463 | */ |
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464 | 21617 | protected function _addIndex(Index $indexCandidate) |
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496 | |||
497 | /** |
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498 | * @return void |
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499 | */ |
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500 | 20921 | protected function _addForeignKeyConstraint(ForeignKeyConstraint $constraint) |
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537 | |||
538 | /** |
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539 | * Returns whether this table has a foreign key constraint with the given name. |
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540 | * |
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541 | * @param string $constraintName |
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542 | * |
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543 | * @return bool |
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544 | */ |
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545 | 19050 | public function hasForeignKey($constraintName) |
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551 | |||
552 | /** |
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553 | * Returns the foreign key constraint with the given name. |
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554 | * |
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555 | * @param string $constraintName The constraint name. |
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556 | * |
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557 | * @return ForeignKeyConstraint |
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558 | * |
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559 | * @throws SchemaException If the foreign key does not exist. |
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560 | */ |
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561 | 267 | public function getForeignKey($constraintName) |
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570 | |||
571 | /** |
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572 | * Removes the foreign key constraint with the given name. |
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573 | * |
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574 | * @param string $constraintName The constraint name. |
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575 | * |
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576 | * @return void |
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577 | * |
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578 | * @throws SchemaException |
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579 | */ |
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580 | 268 | public function removeForeignKey($constraintName) |
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589 | |||
590 | /** |
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591 | * Returns ordered list of columns (primary keys are first, then foreign keys, then the rest) |
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592 | * |
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593 | * @return Column[] |
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594 | */ |
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595 | 21656 | public function getColumns() |
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606 | |||
607 | /** |
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608 | * Returns foreign key columns |
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609 | * |
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610 | * @return Column[] |
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611 | */ |
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612 | 21656 | private function getForeignKeyColumns() |
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621 | |||
622 | /** |
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623 | * Returns only columns that have specified names |
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624 | * |
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625 | * @param string[] $columnNames |
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626 | * |
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627 | * @return Column[] |
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628 | */ |
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629 | 21656 | private function filterColumns(array $columnNames) |
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635 | |||
636 | /** |
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637 | * Returns whether this table has a Column with the given name. |
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638 | * |
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639 | * @param string $columnName The column name. |
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640 | * |
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641 | * @return bool |
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642 | */ |
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643 | 21711 | public function hasColumn($columnName) |
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649 | |||
650 | /** |
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651 | * Returns the Column with the given name. |
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652 | * |
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653 | * @param string $columnName The column name. |
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654 | * |
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655 | * @return Column |
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656 | * |
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657 | * @throws SchemaException If the column does not exist. |
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658 | */ |
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659 | 21577 | public function getColumn($columnName) |
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668 | |||
669 | /** |
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670 | * Returns the primary key. |
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671 | * |
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672 | * @return Index|null The primary key, or null if this Table has no primary key. |
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673 | */ |
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674 | 21661 | public function getPrimaryKey() |
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682 | |||
683 | /** |
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684 | * Returns the primary key columns. |
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685 | * |
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686 | * @return string[] |
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687 | * |
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688 | * @throws DBALException |
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689 | */ |
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690 | 18387 | public function getPrimaryKeyColumns() |
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700 | |||
701 | /** |
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702 | * Returns whether this table has a primary key. |
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703 | * |
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704 | * @return bool |
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705 | */ |
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706 | 21664 | public function hasPrimaryKey() |
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710 | |||
711 | /** |
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712 | * Returns whether this table has an Index with the given name. |
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713 | * |
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714 | * @param string $indexName The index name. |
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715 | * |
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716 | * @return bool |
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717 | */ |
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718 | 21402 | public function hasIndex($indexName) |
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724 | |||
725 | /** |
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726 | * Returns the Index with the given name. |
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727 | * |
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728 | * @param string $indexName The index name. |
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729 | * |
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730 | * @return Index |
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731 | * |
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732 | * @throws SchemaException If the index does not exist. |
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733 | */ |
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734 | 21380 | public function getIndex($indexName) |
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743 | |||
744 | /** |
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745 | * @return Index[] |
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746 | */ |
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747 | 21628 | public function getIndexes() |
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751 | |||
752 | /** |
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753 | * Returns the foreign key constraints. |
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754 | * |
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755 | * @return ForeignKeyConstraint[] |
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756 | */ |
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757 | 21674 | public function getForeignKeys() |
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761 | |||
762 | /** |
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763 | * @param string $name |
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764 | * |
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765 | * @return bool |
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766 | */ |
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767 | 20587 | public function hasOption($name) |
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771 | |||
772 | /** |
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773 | * @param string $name |
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774 | * |
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775 | * @return mixed |
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776 | */ |
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777 | 18907 | public function getOption($name) |
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781 | |||
782 | /** |
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783 | * @return mixed[] |
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784 | */ |
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785 | 21521 | public function getOptions() |
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789 | |||
790 | /** |
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791 | * @return void |
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792 | */ |
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793 | 20704 | public function visit(Visitor $visitor) |
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809 | |||
810 | /** |
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811 | * Clone of a Table triggers a deep clone of all affected assets. |
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812 | * |
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813 | * @return void |
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814 | */ |
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815 | 19841 | public function __clone() |
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830 | |||
831 | /** |
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832 | * Normalizes a given identifier. |
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833 | * |
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834 | * Trims quotes and lowercases the given identifier. |
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835 | * |
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836 | * @param string|null $identifier The identifier to normalize. |
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837 | * |
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838 | * @return string The normalized identifier. |
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839 | */ |
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840 | 21885 | private function normalizeIdentifier($identifier) |
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848 | |||
849 | 18480 | public function setComment(?string $comment) : self |
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856 | |||
857 | 18480 | public function getComment() : ?string |
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861 | } |
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862 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.