| Total Complexity | 41 | 
| Total Lines | 138 | 
| Duplicated Lines | 0 % | 
| Changes | 0 | ||
Complex classes like DoctrineExtractor 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.
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 DoctrineExtractor, and based on these observations, apply Extract Interface, too.
| 1 | <?php | ||
| 35 | final class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeExtractorInterface, PropertyAccessExtractorInterface | ||
| 36 | { | ||
| 37 | private $objectManager; | ||
| 38 | |||
| 39 | public function __construct(ObjectManager $objectManager) | ||
| 40 |     { | ||
| 41 | $this->objectManager = $objectManager; | ||
| 42 | } | ||
| 43 | |||
| 44 | /** | ||
| 45 |      * {@inheritdoc} | ||
| 46 | */ | ||
| 47 | public function getProperties($class, array $context = []) | ||
| 48 |     { | ||
| 49 |         if (null === $metadata = $this->getMetadata($class)) { | ||
| 50 | return null; | ||
| 51 | } | ||
| 52 | |||
| 53 | return $metadata->getFieldNames(); | ||
| 54 | } | ||
| 55 | |||
| 56 | /** | ||
| 57 |      * {@inheritdoc} | ||
| 58 | */ | ||
| 59 | public function getTypes($class, $property, array $context = []) | ||
| 60 |     { | ||
| 61 |         if (null === $metadata = $this->getMetadata($class)) { | ||
| 62 | return null; | ||
| 63 | } | ||
| 64 | |||
| 65 |         if ($metadata->hasAssociation($property)) { | ||
| 66 | $class = $metadata->getAssociationTargetClass($property); | ||
| 67 | |||
| 68 |             if ($metadata->isSingleValuedAssociation($property)) { | ||
| 69 | $nullable = $metadata instanceof MongoDbClassMetadata && $metadata->isNullable($property); | ||
| 70 | |||
| 71 | return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, $class)]; | ||
| 72 | } | ||
| 73 | |||
| 74 | $collectionKeyType = Type::BUILTIN_TYPE_INT; | ||
| 75 | |||
| 76 | return [ | ||
| 77 | new Type( | ||
| 78 | Type::BUILTIN_TYPE_OBJECT, | ||
| 79 | false, | ||
| 80 | Collection::class, | ||
| 81 | true, | ||
| 82 | new Type($collectionKeyType), | ||
| 83 | new Type(Type::BUILTIN_TYPE_OBJECT, false, $class) | ||
| 84 | ), | ||
| 85 | ]; | ||
| 86 | } | ||
| 87 | |||
| 88 |         if ($metadata->hasField($property)) { | ||
| 89 | $typeOfField = $metadata->getTypeOfField($property); | ||
| 90 | $nullable = $metadata instanceof MongoDbClassMetadata && $metadata->isNullable($property); | ||
| 91 | |||
| 92 |             switch ($typeOfField) { | ||
| 93 | case MongoDbType::DATE: | ||
| 94 | return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateTime')]; | ||
| 95 | case MongoDbType::HASH: | ||
| 96 | return [new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true)]; | ||
| 97 | case MongoDbType::COLLECTION: | ||
| 98 | return [new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true, new Type(Type::BUILTIN_TYPE_INT))]; | ||
| 99 | default: | ||
| 100 | $builtinType = $this->getPhpType($typeOfField); | ||
| 101 | |||
| 102 | return $builtinType ? [new Type($builtinType, $nullable)] : null; | ||
| 103 | } | ||
| 104 | } | ||
| 105 | |||
| 106 | return null; | ||
| 107 | } | ||
| 108 | |||
| 109 | /** | ||
| 110 |      * {@inheritdoc} | ||
| 111 | */ | ||
| 112 | public function isReadable($class, $property, array $context = []): ?bool | ||
| 113 |     { | ||
| 114 | return null; | ||
| 115 | } | ||
| 116 | |||
| 117 | /** | ||
| 118 |      * {@inheritdoc} | ||
| 119 | */ | ||
| 120 | public function isWritable($class, $property, array $context = []): ?bool | ||
| 121 |     { | ||
| 122 | if ( | ||
| 123 | null === ($metadata = $this->getMetadata($class)) | ||
| 124 | || $metadata instanceof MongoDbClassMetadata && MongoDbClassMetadata::GENERATOR_TYPE_NONE === $metadata->generatorType | ||
| 125 | || !\in_array($property, $metadata->getIdentifierFieldNames(), true) | ||
| 126 |         ) { | ||
| 127 | return null; | ||
| 128 | } | ||
| 129 | |||
| 130 | return false; | ||
| 131 | } | ||
| 132 | |||
| 133 | private function getMetadata(string $class): ?ClassMetadata | ||
| 134 |     { | ||
| 135 |         try { | ||
| 136 | return $this->objectManager->getClassMetadata($class); | ||
|  | |||
| 137 |         } catch (MappingException $exception) { | ||
| 138 | return null; | ||
| 139 | } | ||
| 140 | } | ||
| 141 | |||
| 142 | /** | ||
| 143 | * Gets the corresponding built-in PHP type. | ||
| 144 | */ | ||
| 145 | private function getPhpType(string $doctrineType): ?string | ||
| 173 | } | ||
| 174 | } | ||
| 175 |