Complex classes like QueryHandler 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 QueryHandler, and based on these observations, apply Extract Interface, too.
1 | <?php |
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24 | class QueryHandler { |
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25 | |||
26 | /** |
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27 | * The global icon. |
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28 | * @var string |
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29 | */ |
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30 | public $icon = ''; |
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31 | |||
32 | /** |
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33 | * The global text. |
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34 | * @var string |
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35 | */ |
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36 | public $text = ''; |
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37 | |||
38 | /** |
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39 | * The global title. |
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40 | * @var string |
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41 | */ |
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42 | public $title = ''; |
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43 | |||
44 | private $queryResult; |
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45 | |||
46 | private $outputMode; |
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47 | |||
48 | /** |
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49 | * The template to use for the text, or false if there is none. |
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50 | * @var string|boolean false |
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51 | */ |
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52 | private $template = false; |
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53 | |||
54 | /** |
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55 | * Should link targets be made absolute (instead of relative)? |
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56 | * @var boolean |
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57 | */ |
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58 | private $linkAbsolute; |
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59 | |||
60 | /** |
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61 | * A separator to use between the subject and properties in the text field. |
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62 | * @var string |
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63 | */ |
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64 | private $subjectSeparator = '<hr />'; |
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65 | |||
66 | /** |
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67 | * Show the subject in the text or not? |
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68 | * @var boolean |
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69 | */ |
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70 | private $showSubject = true; |
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71 | |||
72 | /** |
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73 | * Hide the namespace or not. |
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74 | * @var boolean |
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75 | */ |
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76 | private $hideNamespace = false; |
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77 | |||
78 | /** |
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79 | * Defines which article names in the result are hyperlinked, all normally is the default |
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80 | * none, subject, all |
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81 | */ |
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82 | private $linkStyle = 'all'; |
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83 | |||
84 | /* |
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85 | * Show headers (with links), show headers (just text) or hide them. show is default |
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86 | * show, plain, hide |
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87 | */ |
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88 | private $headerStyle = 'show'; |
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89 | |||
90 | /** |
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91 | * Marker icon to show when marker equals active page |
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92 | * @var string|null |
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93 | */ |
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94 | private $activeIcon = null; |
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95 | |||
96 | /** |
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97 | * @var string |
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98 | */ |
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99 | private $userParam = ''; |
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100 | |||
101 | 3 | public function __construct( SMWQueryResult $queryResult, int $outputMode, bool $linkAbsolute = false ) { |
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106 | |||
107 | 3 | public function setTemplate( string $template ) { |
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110 | |||
111 | 3 | public function setUserParam( string $userParam ) { |
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114 | |||
115 | /** |
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116 | * Sets the global icon. |
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117 | */ |
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118 | public function setIcon( string $icon ) { |
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121 | |||
122 | /** |
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123 | * Sets the global title. |
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124 | */ |
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125 | public function setTitle( string $title ) { |
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128 | |||
129 | /** |
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130 | * Sets the global text. |
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131 | */ |
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132 | public function setText( string $text ) { |
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135 | |||
136 | public function setSubjectSeparator( string $subjectSeparator ) { |
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139 | |||
140 | 3 | public function setShowSubject( bool $showSubject ) { |
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143 | |||
144 | 3 | public function setLinkStyle( string $link ) { |
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147 | |||
148 | 3 | public function setHeaderStyle( string $headers ) { |
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151 | |||
152 | /** |
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153 | * @return Location[] |
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154 | */ |
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155 | 3 | public function getLocations(): iterable { |
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160 | |||
161 | /** |
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162 | * @param SMWResultArray[] $row |
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163 | * @return Location[] |
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164 | */ |
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165 | 3 | private function handlePageResult( array $row ): array { |
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166 | 3 | [ $title, $text ] = $this->getTitleAndText( $row[0] ); |
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167 | 3 | [ $locations, $properties ] = $this->getLocationsAndProperties( $row ); |
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168 | |||
169 | 3 | return $this->buildLocationsForPage( |
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170 | 3 | $locations, |
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171 | $text, |
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172 | 3 | $this->getLocationIcon( $row ), |
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173 | $properties, |
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174 | $title |
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175 | ); |
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176 | } |
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177 | |||
178 | /** |
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179 | * @param SMWResultArray $resultArray |
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180 | * @return array|string[] [string $title, string $text] |
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181 | */ |
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182 | 3 | private function getTitleAndText( SMWResultArray $resultArray ): array { |
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201 | |||
202 | /** |
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203 | * @param SMWResultArray[] $row |
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204 | * @return array |
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205 | */ |
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206 | 3 | private function getLocationsAndProperties( array $row ): array { |
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238 | |||
239 | 3 | private function locationFromDataItem( SMWDIGeoCoord $dataItem ): Location { |
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245 | |||
246 | /** |
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247 | * Handles a SMWWikiPageValue subject value. |
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248 | * Gets the plain text title and creates the HTML text with headers and the like. |
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249 | * |
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250 | * @param SMWWikiPageValue $object |
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251 | * |
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252 | * @return string |
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253 | */ |
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254 | 3 | private function getResultSubjectText( SMWWikiPageValue $object ): string { |
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281 | |||
282 | 3 | private function showArticleLink() { |
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285 | |||
286 | /** |
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287 | * Handles a single property (SMWPrintRequest) to be displayed for a record (SMWDataValue). |
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288 | */ |
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289 | 1 | private function handleResultProperty( SMWDataValue $object, SMWPrintRequest $printRequest ): string { |
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301 | |||
302 | 1 | private function getPropertyName( SMWPrintRequest $printRequest ): string { |
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324 | |||
325 | 1 | private function getPropertyLinker(): ?Linker { |
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328 | |||
329 | 1 | private function getValueLinker(): ?Linker { |
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332 | |||
333 | 1 | private function getPropertyValue( SMWDataValue $object ): string { |
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355 | |||
356 | private function hasPage( SMWDataValue $object ): bool { |
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366 | |||
367 | 3 | private function hasTemplate() { |
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370 | |||
371 | /** |
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372 | * Get the icon for a row. |
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373 | * |
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374 | * @param array $row |
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375 | * |
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376 | * @return string |
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377 | */ |
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378 | 3 | private function getLocationIcon( array $row ) { |
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416 | |||
417 | 3 | private function shouldGetActiveIconUrlFor( Title $title ) { |
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423 | |||
424 | /** |
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425 | * @param Location[] $locations |
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426 | * @param string $text |
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427 | * @param string $icon |
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428 | * @param array $properties |
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429 | * @param string $title |
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430 | * |
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431 | * @return Location[] |
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432 | */ |
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433 | 3 | private function buildLocationsForPage( array $locations, $text, $icon, array $properties, string $title ): array { |
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446 | |||
447 | 3 | private function buildPopupText( array $properties, string $title, Location $location ): string { |
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461 | |||
462 | 1 | private function newTemplatedPopup(): TemplatedPopup { |
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468 | |||
469 | 3 | private function getTitleOutput( string $titleText ) { |
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478 | |||
479 | 1 | private function getParser(): \Parser { |
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482 | |||
483 | /** |
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484 | * @return boolean |
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485 | */ |
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486 | public function getHideNamespace() { |
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489 | |||
490 | /** |
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491 | * @param boolean $hideNamespace |
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492 | */ |
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493 | 3 | public function setHideNamespace( $hideNamespace ) { |
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496 | |||
497 | /** |
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498 | * @return string |
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499 | */ |
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500 | public function getActiveIcon() { |
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503 | |||
504 | /** |
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505 | * @param string $activeIcon |
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506 | */ |
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507 | 3 | public function setActiveIcon( $activeIcon ) { |
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510 | |||
511 | } |
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512 |
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.