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 ObjectBase 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 ObjectBase, and based on these observations, apply Extract Interface, too.
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14 | abstract class ObjectBase |
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15 | { |
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16 | /** |
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17 | * An array of audio resources attached to the object. |
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18 | * |
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19 | * @var array|Audio[] |
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20 | */ |
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21 | public $audios = []; |
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22 | |||
23 | /** |
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24 | * A short description of the object. |
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25 | * |
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26 | * @var string |
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27 | */ |
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28 | public $description; |
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29 | |||
30 | /** |
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31 | * The word that appears before the object's title in a sentence. This is an list of words from 'a', 'an', 'the', |
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32 | * ' "" ', or 'auto'. If 'auto' is chosen, the consumer of the object will chose between 'a' or 'an'. The default is |
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33 | * the blank, "". |
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34 | * |
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35 | * @var string |
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36 | */ |
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37 | public $determiner; |
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38 | |||
39 | /** |
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40 | * An array of images attached to the object. |
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41 | * |
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42 | * @var array|Image[] |
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43 | */ |
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44 | public $images = []; |
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45 | |||
46 | /** |
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47 | * The locale that the object's tags are marked up in, in the format language_TERRITORY. |
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48 | * |
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49 | * @var string |
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50 | */ |
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51 | public $locale; |
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52 | |||
53 | /** |
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54 | * An array of alternate locales in which the resource is available. |
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55 | * |
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56 | * @var array|string[] |
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57 | */ |
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58 | public $localeAlternate = []; |
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59 | |||
60 | /** |
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61 | * @var bool |
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62 | */ |
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63 | public $richAttachment; |
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64 | |||
65 | /** |
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66 | * An array of URLs of related resources. |
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67 | * |
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68 | * @var array|string[] |
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69 | */ |
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70 | public $seeAlso = []; |
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71 | |||
72 | /** |
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73 | * The name of the web site upon which the object resides. |
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74 | * |
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75 | * @var string |
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76 | */ |
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77 | public $siteName; |
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78 | |||
79 | /** |
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80 | * The title of the object as it should appear in the graph. |
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81 | * |
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82 | * @var string |
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83 | */ |
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84 | public $title; |
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85 | |||
86 | /** |
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87 | * The type of the object, such as 'article'. |
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88 | * |
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89 | * @var string |
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90 | */ |
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91 | public $type; |
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92 | |||
93 | /** |
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94 | * The time when the object was last updated. |
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95 | * |
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96 | * @var \DateTime |
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97 | */ |
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98 | public $updatedTime; |
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99 | |||
100 | /** |
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101 | * The canonical URL of the object, used as its ID in the graph. |
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102 | * |
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103 | * @var string |
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104 | */ |
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105 | public $url; |
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106 | |||
107 | /** |
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108 | * An array of videos attached to the object. |
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109 | * |
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110 | * @var array|Video[] |
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111 | */ |
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112 | public $videos = []; |
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113 | |||
114 | 27 | public function __construct() |
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117 | |||
118 | /** |
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119 | * Assigns all properties given to the this Object instance. |
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120 | * |
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121 | * @param array|Property[] $properties Array of all properties to assign. |
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122 | * @param bool $debug Throw exceptions when parsing or not. |
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123 | * |
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124 | * @throws \UnexpectedValueException |
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125 | */ |
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126 | 15 | public function assignProperties(array $properties, $debug = false) |
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235 | |||
236 | 2 | private function handleImageAttribute(Image $element, $name, $value) |
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257 | |||
258 | 1 | private function handleVideoAttribute(Video $element, $name, $value) |
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276 | |||
277 | 1 | private function handleAudioAttribute(Audio $element, $name, $value) |
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289 | |||
290 | 1 | protected function convertToDateTime($value) |
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294 | |||
295 | 1 | protected function convertToBoolean($value) |
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306 | |||
307 | /** |
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308 | * Gets all properties set on this object. |
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309 | * |
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310 | * @return array|Property[] |
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311 | */ |
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312 | public function getProperties() |
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374 | } |
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375 |