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:
| 1 | <?php  | 
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| 25 | final class ConverterProvider  | 
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| 26 | { | 
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| 27 | /**  | 
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| 28 | * A cache of [@see ResponseBodyConverter]'s  | 
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| 29 | *  | 
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| 30 | * @var ResponseBodyConverter[]  | 
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| 31 | */  | 
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| 32 | private $responseBodyConverters = [];  | 
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| 33 | |||
| 34 | /**  | 
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| 35 | * A cache of [@see RequestBodyConverter]'s  | 
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| 36 | *  | 
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| 37 | * @var RequestBodyConverter[]  | 
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| 38 | */  | 
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| 39 | private $requestBodyConverters = [];  | 
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| 40 | |||
| 41 | /**  | 
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| 42 | * A cache of [@see StringConverter]'s  | 
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| 43 | *  | 
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| 44 | * @var StringConverter[]  | 
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| 45 | */  | 
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| 46 | private $stringConverters = [];  | 
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| 47 | |||
| 48 | /**  | 
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| 49 | * An array of [@see ConverterFactory]'s  | 
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| 50 | *  | 
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| 51 | * @var ConverterFactory[]  | 
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| 52 | */  | 
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| 53 | private $converterFactories;  | 
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| 54 | |||
| 55 | /**  | 
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| 56 | * Constructor  | 
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| 57 | *  | 
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| 58 | * @param ConverterFactory[] $factories  | 
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| 59 | */  | 
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| 60 | 48 | public function __construct(array $factories)  | 
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| 64 | |||
| 65 | /**  | 
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| 66 | * Get a response body converter for type  | 
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| 67 | *  | 
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| 68 | * @param TypeToken $type  | 
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| 69 | * @return ResponseBodyConverter  | 
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| 70 | * @throws LogicException  | 
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| 71 | */  | 
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| 72 | 16 | View Code Duplication | public function getResponseBodyConverter(TypeToken $type): ResponseBodyConverter  | 
            
| 95 | |||
| 96 | /**  | 
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| 97 | * Get a request body converter for type  | 
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| 98 | *  | 
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| 99 | * @param TypeToken $type  | 
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| 100 | * @return RequestBodyConverter  | 
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| 101 | * @throws \LogicException  | 
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| 102 | */  | 
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| 103 | 7 | View Code Duplication | public function getRequestBodyConverter(TypeToken $type): RequestBodyConverter  | 
            
| 126 | |||
| 127 | /**  | 
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| 128 | * Get a string converter for type  | 
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| 129 | *  | 
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| 130 | * @param TypeToken $type  | 
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| 131 | * @return StringConverter  | 
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| 132 | * @throws \LogicException  | 
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| 133 | */  | 
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| 134 | 13 | View Code Duplication | public function getStringConverter(TypeToken $type): StringConverter  | 
            
| 157 | }  | 
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| 158 |