Complex classes like Country 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 Country, and based on these observations, apply Extract Interface, too.
1 | <?php |
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12 | class Country |
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13 | { |
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14 | /** |
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15 | * The attributes array. |
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16 | * |
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17 | * @var array |
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18 | */ |
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19 | protected $attributes; |
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20 | |||
21 | /** |
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22 | * Create a new Country instance. |
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23 | * |
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24 | * @param array $attributes |
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25 | * |
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26 | * @throws \Exception |
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27 | */ |
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28 | public function __construct($attributes) |
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40 | |||
41 | /** |
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42 | * Set the attributes. |
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43 | * |
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44 | * @param array $attributes |
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45 | * |
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46 | * @return $this |
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47 | */ |
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48 | public function setAttributes($attributes) |
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54 | |||
55 | /** |
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56 | * Get the attributes. |
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57 | * |
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58 | * @return array|null |
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59 | */ |
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60 | public function getAttributes(): ?array |
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64 | |||
65 | /** |
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66 | * Set single attribute. |
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67 | * |
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68 | * @param string $key |
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69 | * @param mixed $value |
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70 | * |
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71 | * @return $this |
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72 | */ |
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73 | public function set($key, $value) |
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79 | |||
80 | /** |
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81 | * Get an item from attributes array using "dot" notation. |
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82 | * |
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83 | * @param string $key |
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84 | * @param mixed $default |
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85 | * |
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86 | * @return mixed |
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87 | */ |
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88 | public function get($key, $default = null) |
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110 | |||
111 | /** |
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112 | * Get the common name. |
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113 | * |
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114 | * @return string|null |
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115 | */ |
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116 | public function getName(): ?string |
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120 | |||
121 | /** |
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122 | * Get the official name. |
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123 | * |
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124 | * @return string|null |
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125 | */ |
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126 | public function getOfficialName(): ?string |
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130 | |||
131 | /** |
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132 | * Get the given native name or fallback to first native name. |
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133 | * |
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134 | * @param string|null $languageCode |
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135 | * |
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136 | * @return string|null |
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137 | */ |
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138 | public function getNativeName($languageCode = null): ?string |
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145 | |||
146 | /** |
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147 | * Get the given native official name or fallback to first native official name. |
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148 | * |
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149 | * @param string|null $languageCode |
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150 | * |
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151 | * @return string|null |
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152 | */ |
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153 | public function getNativeOfficialName($languageCode = null): ?string |
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160 | |||
161 | /** |
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162 | * Get the native names. |
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163 | * |
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164 | * @return array|null |
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165 | */ |
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166 | public function getNativeNames(): ?array |
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170 | |||
171 | /** |
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172 | * Get the demonym. |
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173 | * |
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174 | * @return string|null |
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175 | */ |
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176 | public function getDemonym(): ?string |
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180 | |||
181 | /** |
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182 | * Get the capital. |
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183 | * |
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184 | * @return string|null |
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185 | */ |
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186 | public function getCapital(): ?string |
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190 | |||
191 | /** |
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192 | * Get the ISO 3166-1 alpha2. |
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193 | * |
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194 | * @return string|null |
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195 | */ |
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196 | public function getIsoAlpha2() |
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200 | |||
201 | /** |
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202 | * Get the ISO 3166-1 alpha3. |
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203 | * |
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204 | * @return string|null |
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205 | */ |
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206 | public function getIsoAlpha3() |
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210 | |||
211 | /** |
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212 | * Get the ISO 3166-1 numeric. |
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213 | * |
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214 | * @return string|null |
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215 | */ |
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216 | public function getIsoNumeric(): ?string |
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220 | |||
221 | /** |
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222 | * Get the given currency or fallback to first currency. |
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223 | * |
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224 | * @param string|null $currency |
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225 | * |
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226 | * @return array|null |
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227 | */ |
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228 | public function getCurrency($currency = null): ?array |
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234 | |||
235 | /** |
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236 | * Get the currencies. |
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237 | * |
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238 | * @return array|null |
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239 | */ |
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240 | public function getCurrencies(): ?array |
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244 | |||
245 | /** |
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246 | * Get the TLD. |
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247 | * |
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248 | * @return string|null |
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249 | */ |
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250 | public function getTld(): ?string |
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254 | |||
255 | /** |
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256 | * Get the TLDs. |
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257 | * |
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258 | * @return array|null |
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259 | */ |
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260 | public function getTlds(): ?array |
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264 | |||
265 | /** |
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266 | * Get the alternative spellings. |
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267 | * |
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268 | * @return array|null |
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269 | */ |
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270 | public function getAltSpellings(): ?array |
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274 | |||
275 | /** |
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276 | * Get the given language or fallback to first language. |
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277 | * |
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278 | * @param string|null $languageCode |
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279 | * |
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280 | * @return string|null |
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281 | */ |
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282 | public function getLanguage($languageCode = null): ?string |
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288 | |||
289 | /** |
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290 | * Get the languages. |
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291 | * |
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292 | * @return array|null |
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293 | */ |
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294 | public function getLanguages(): ?array |
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298 | |||
299 | /** |
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300 | * Get the translations. |
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301 | * |
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302 | * @return array |
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303 | */ |
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304 | public function getTranslations(): array |
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329 | |||
330 | /** |
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331 | * Get the translation. |
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332 | * |
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333 | * @param string|null $languageCode |
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334 | * |
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335 | * @return array |
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336 | */ |
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337 | public function getTranslation($languageCode = null): array |
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341 | |||
342 | /** |
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343 | * Get the geodata. |
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344 | * |
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345 | * @return array|null |
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346 | */ |
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347 | public function getGeodata(): ?array |
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351 | |||
352 | /** |
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353 | * Get the continent. |
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354 | * |
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355 | * @return string|null |
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356 | */ |
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357 | public function getContinent(): ?string |
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361 | |||
362 | /** |
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363 | * Determine whether the country uses postal code. |
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364 | * |
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365 | * @return bool|null |
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366 | */ |
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367 | public function usesPostalCode() |
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371 | |||
372 | /** |
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373 | * Get the latitude. |
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374 | * |
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375 | * @return string|null |
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376 | */ |
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377 | public function getLatitude(): ?string |
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381 | |||
382 | /** |
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383 | * Get the longitude. |
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384 | * |
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385 | * @return string|null |
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386 | */ |
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387 | public function getLongitude(): ?string |
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391 | |||
392 | /** |
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393 | * Get the described latitude. |
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394 | * |
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395 | * @return string|null |
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396 | */ |
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397 | public function getLatitudeDesc(): ?string |
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401 | |||
402 | /** |
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403 | * Get the described longitude. |
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404 | * |
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405 | * @return string|null |
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406 | */ |
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407 | public function getLongitudeDesc(): ?string |
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411 | |||
412 | /** |
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413 | * Get the maximum latitude. |
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414 | * |
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415 | * @return string|null |
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416 | */ |
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417 | public function getMaxLatitude(): ?string |
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421 | |||
422 | /** |
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423 | * Get the maximum longitude. |
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424 | * |
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425 | * @return string|null |
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426 | */ |
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427 | public function getMaxLongitude(): ?string |
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431 | |||
432 | /** |
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433 | * Get the minimum latitude. |
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434 | * |
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435 | * @return string|null |
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436 | */ |
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437 | public function getMinLatitude(): ?string |
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441 | |||
442 | /** |
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443 | * Get the minimum longitude. |
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444 | * |
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445 | * @return string|null |
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446 | */ |
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447 | public function getMinLongitude(): ?string |
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451 | |||
452 | /** |
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453 | * Get the area. |
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454 | * |
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455 | * @return int|null |
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456 | */ |
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457 | public function getArea(): ?int |
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461 | |||
462 | /** |
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463 | * Get the region. |
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464 | * |
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465 | * @return string|null |
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466 | */ |
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467 | public function getRegion(): ?string |
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471 | |||
472 | /** |
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473 | * Get the subregion. |
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474 | * |
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475 | * @return string|null |
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476 | */ |
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477 | public function getSubregion(): ?string |
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481 | |||
482 | /** |
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483 | * Get the world region. |
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484 | * |
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485 | * @return string|null |
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486 | */ |
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487 | public function getWorldRegion(): ?string |
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491 | |||
492 | /** |
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493 | * Get the region code. |
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494 | * |
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495 | * @return string|null |
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496 | */ |
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497 | public function getRegionCode(): ?string |
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501 | |||
502 | /** |
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503 | * Get the subregion code. |
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504 | * |
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505 | * @return string|null |
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506 | */ |
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507 | public function getSubregionCode(): ?string |
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511 | |||
512 | /** |
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513 | * Check the landlock status. |
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514 | * |
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515 | * @return bool|null |
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516 | */ |
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517 | public function isLandlocked() |
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521 | |||
522 | /** |
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523 | * Get the borders. |
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524 | * |
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525 | * @return array|null |
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526 | */ |
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527 | public function getBorders(): ?array |
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531 | |||
532 | /** |
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533 | * Determine whether the country is independent. |
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534 | * |
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535 | * @return string|null |
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536 | */ |
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537 | public function isIndependent(): ?string |
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541 | |||
542 | /** |
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543 | * Get the given calling code or fallback to first calling code. |
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544 | * |
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545 | * @return string|null |
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546 | */ |
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547 | public function getCallingCode(): ?string |
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551 | |||
552 | /** |
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553 | * Get the calling codes. |
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554 | * |
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555 | * @return array|null |
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556 | */ |
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557 | public function getCallingCodes(): ?array |
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561 | |||
562 | /** |
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563 | * Get the national prefix. |
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564 | * |
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565 | * @return string|null |
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566 | */ |
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567 | public function getNationalPrefix(): ?string |
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571 | |||
572 | /** |
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573 | * Get the national number length. |
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574 | * |
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575 | * @return int|null |
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576 | */ |
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577 | public function getNationalNumberLength(): ?int |
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581 | |||
582 | /** |
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583 | * Get the national number lengths. |
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584 | * |
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585 | * @return array|null |
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586 | */ |
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587 | public function getNationalNumberLengths(): ?array |
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591 | |||
592 | /** |
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593 | * Get the national destination code length. |
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594 | * |
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595 | * @return int|null |
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596 | */ |
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597 | public function getNationalDestinationCodeLength(): ?int |
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601 | |||
602 | /** |
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603 | * Get the national destination code lengths. |
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604 | * |
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605 | * @return array|null |
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606 | */ |
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607 | public function getnationaldestinationcodelengths(): ?array |
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611 | |||
612 | /** |
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613 | * Get the international prefix. |
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614 | * |
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615 | * @return string|null |
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616 | */ |
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617 | public function getInternationalPrefix(): ?string |
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621 | |||
622 | /** |
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623 | * Get the extras. |
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624 | * |
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625 | * @return array|null |
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626 | */ |
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627 | public function getExtra(): ?array |
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631 | |||
632 | /** |
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633 | * Get the geonameid. |
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634 | * |
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635 | * @return int|null |
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636 | */ |
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637 | public function getGeonameid(): ?int |
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641 | |||
642 | /** |
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643 | * Get the edgar code. |
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644 | * |
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645 | * @return string|null |
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646 | */ |
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647 | public function getEdgar(): ?string |
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651 | |||
652 | /** |
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653 | * Get the itu code. |
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654 | * |
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655 | * @return string|null |
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656 | */ |
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657 | public function getItu(): ?string |
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661 | |||
662 | /** |
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663 | * Get the marc code. |
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664 | * |
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665 | * @return string|null |
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666 | */ |
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667 | public function getMarc(): ?string |
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671 | |||
672 | /** |
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673 | * Get the wmo code. |
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674 | * |
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675 | * @return string|null |
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676 | */ |
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677 | public function getWmo(): ?string |
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681 | |||
682 | /** |
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683 | * Get the ds code. |
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684 | * |
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685 | * @return string|null |
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686 | */ |
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687 | public function getDs(): ?string |
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691 | |||
692 | /** |
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693 | * Get the fifa code. |
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694 | * |
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695 | * @return string|null |
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696 | */ |
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697 | public function getFifa(): ?string |
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701 | |||
702 | /** |
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703 | * Get the fips code. |
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704 | * |
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705 | * @return string|null |
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706 | */ |
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707 | public function getFips(): ?string |
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711 | |||
712 | /** |
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713 | * Get the gaul code. |
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714 | * |
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715 | * @return int|null |
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716 | */ |
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717 | public function getGaul(): ?int |
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721 | |||
722 | /** |
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723 | * Get the ioc code. |
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724 | * |
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725 | * @return string|null |
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726 | */ |
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727 | public function getIoc(): ?string |
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731 | |||
732 | /** |
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733 | * Get the cowc code. |
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734 | * |
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735 | * @return string|null |
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736 | */ |
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737 | public function getCowc(): ?string |
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741 | |||
742 | /** |
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743 | * Get the cown code. |
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744 | * |
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745 | * @return int|null |
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746 | */ |
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747 | public function getCown(): ?int |
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751 | |||
752 | /** |
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753 | * Get the fao code. |
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754 | * |
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755 | * @return int|null |
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756 | */ |
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757 | public function getFao(): ?int |
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761 | |||
762 | /** |
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763 | * Get the imf code. |
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764 | * |
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765 | * @return int|null |
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766 | */ |
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767 | public function getImf(): ?int |
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771 | |||
772 | /** |
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773 | * Get the ar5 code. |
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774 | * |
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775 | * @return string|null |
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776 | */ |
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777 | public function getAr5() |
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781 | |||
782 | /** |
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783 | * Get the address format. |
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784 | * |
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785 | * @return string|null |
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786 | */ |
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787 | public function getAddressFormat(): ?string |
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791 | |||
792 | /** |
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793 | * Determine whether the country is EU member. |
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794 | * |
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795 | * @return bool|null |
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796 | */ |
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797 | public function isEuMember() |
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801 | |||
802 | /** |
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803 | * Get the VAT rates. |
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804 | * |
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805 | * @return array|null |
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806 | */ |
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807 | public function getVatRates(): ?array |
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811 | |||
812 | /** |
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813 | * Get the emoji. |
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814 | * |
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815 | * @return string|null |
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816 | */ |
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817 | public function getEmoji(): ?string |
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821 | |||
822 | /** |
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823 | * Get the geographic data structure. |
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824 | * |
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825 | * @return string|null |
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826 | */ |
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827 | public function getGeoJson(): ?string |
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835 | |||
836 | /** |
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837 | * Get the flag. |
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838 | * |
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839 | * @return string|null |
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840 | */ |
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841 | public function getFlag(): ?string |
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849 | |||
850 | /** |
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851 | * Get the divisions. |
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852 | * |
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853 | * @return array|null |
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854 | */ |
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855 | public function getDivisions(): ?array |
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863 | |||
864 | /** |
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865 | * Get the divisions. |
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866 | * |
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867 | * @param string $division |
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868 | * |
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869 | * @return array|null |
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870 | */ |
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871 | public function getDivision($division): ?array |
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876 | |||
877 | /** |
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878 | * Get the timezones. |
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879 | * |
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880 | * @return array|null |
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881 | */ |
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882 | public function getTimezones() |
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890 | |||
891 | /** |
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892 | * Get the locales. |
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893 | * |
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894 | * @return array|null |
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895 | */ |
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896 | public function getLocales() |
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911 | } |
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912 |