Complex classes like Context 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 Context, and based on these observations, apply Extract Interface, too.
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19 | final class Context |
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20 | { |
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21 | private $registration; |
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22 | private $instructor; |
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23 | private $team; |
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24 | private $contextActivities; |
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25 | private $revision; |
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26 | private $platform; |
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27 | private $language; |
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28 | private $statement; |
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29 | private $extensions; |
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30 | |||
31 | public function withRegistration(string $registration): self |
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38 | |||
39 | public function withInstructor(Actor $instructor): self |
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46 | |||
47 | public function withTeam(Group $team): self |
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54 | |||
55 | public function withContextActivities(ContextActivities $contextActivities): self |
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62 | |||
63 | public function withRevision(string $revision): self |
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70 | |||
71 | public function withPlatform(string $platform): self |
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78 | |||
79 | public function withLanguage(string $language): self |
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86 | |||
87 | public function withStatement(StatementReference $statement): self |
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94 | |||
95 | public function withExtensions(Extensions $extensions): self |
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102 | |||
103 | public function getRegistration(): ?string |
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107 | |||
108 | public function getInstructor(): ?Actor |
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112 | |||
113 | public function getTeam(): ?Group |
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117 | |||
118 | public function getContextActivities(): ?ContextActivities |
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122 | |||
123 | public function getRevision(): ?string |
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127 | |||
128 | public function getPlatform(): ?string |
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132 | |||
133 | public function getLanguage(): ?string |
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137 | |||
138 | public function getStatement(): ?StatementReference |
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142 | |||
143 | public function getExtensions(): ?Extensions |
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147 | |||
148 | public function equals(Context $context): bool |
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204 | } |
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205 |