pjordaan /
apie-object-access-normalizer
| Total Complexity | 77 |
| Total Lines | 340 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like ObjectAccess 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 ObjectAccess, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 17 | class ObjectAccess implements ObjectAccessInterface |
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| 18 | { |
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| 19 | private $getterCache = []; |
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| 20 | |||
| 21 | private $setterCache = []; |
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| 22 | |||
| 23 | private $phpDocExtractor; |
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| 24 | |||
| 25 | private $methodFlags; |
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| 26 | |||
| 27 | private $propertyFlags; |
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| 28 | |||
| 29 | public function __construct(bool $publicOnly = true) |
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| 30 | { |
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| 31 | $this->methodFlags = $publicOnly |
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| 32 | ? ReflectionMethod::IS_PUBLIC |
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| 33 | : (ReflectionMethod::IS_PUBLIC|ReflectionMethod::IS_PROTECTED|ReflectionMethod::IS_PRIVATE); |
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| 34 | $this->propertyFlags = $publicOnly |
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| 35 | ? ReflectionProperty::IS_PUBLIC |
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| 36 | : (ReflectionProperty::IS_PUBLIC|ReflectionProperty::IS_PROTECTED|ReflectionProperty::IS_PRIVATE); |
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| 37 | $this->phpDocExtractor = new PhpDocExtractor(); |
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| 38 | } |
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| 39 | |||
| 40 | private function sort(array& $options) |
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| 41 | { |
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| 42 | usort($options, function ($a, $b) { |
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| 43 | if ($a instanceof ReflectionProperty) { |
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| 44 | return 1; |
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| 45 | } |
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| 46 | if ($b instanceof ReflectionProperty) { |
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| 47 | return -1; |
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| 48 | } |
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| 49 | /** @var ReflectionMethod $a */ |
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| 50 | /** @var ReflectionMethod $b */ |
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| 51 | // prio: get, is, has: |
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| 52 | if (strpos($a->getName(), 'get') === 0) { |
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| 53 | return -1; |
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| 54 | } |
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| 55 | if (strpos($b->getName(), 'get') === 0) { |
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| 56 | return 1; |
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| 57 | } |
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| 58 | if (strpos($a->getName(), 'is') === 0) { |
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| 59 | return -1; |
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| 60 | } |
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| 61 | return 1; |
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| 62 | }); |
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| 63 | } |
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| 64 | |||
| 65 | protected function getGetterMapping(ReflectionClass $reflectionClass): array |
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| 66 | { |
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| 67 | $className= $reflectionClass->getName(); |
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| 68 | if (isset($this->getterCache[$className])) { |
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| 69 | return $this->getterCache[$className]; |
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| 70 | } |
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| 71 | |||
| 72 | $attributes = []; |
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| 73 | |||
| 74 | $reflectionMethods = $reflectionClass->getMethods($this->methodFlags); |
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| 75 | foreach ($reflectionMethods as $method) { |
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| 76 | if (!$this->isGetMethod($method)) { |
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| 77 | continue; |
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| 78 | } |
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| 79 | |||
| 80 | $attributeName = lcfirst(substr($method->name, 0 === strpos($method->name, 'is') ? 2 : 3)); |
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| 81 | $method->setAccessible(true); |
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| 82 | $attributes[$attributeName][] = $method; |
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| 83 | } |
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| 84 | $reflectionProperties = $reflectionClass->getProperties($this->propertyFlags); |
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| 85 | foreach ($reflectionProperties as $property) { |
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| 86 | $attributeName = $property->getName(); |
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| 87 | $property->setAccessible(true); |
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| 88 | $attributes[$attributeName][] = $property; |
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| 89 | } |
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| 90 | foreach ($attributes as &$methods) { |
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| 91 | $this->sort($methods); |
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| 92 | } |
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| 93 | |||
| 94 | return $this->getterCache[$className] = $attributes; |
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| 95 | } |
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| 96 | |||
| 97 | protected function getSetterMapping(ReflectionClass $reflectionClass): array |
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| 98 | { |
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| 99 | $className= $reflectionClass->getName(); |
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| 100 | if (isset($this->setterCache[$className])) { |
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| 101 | return $this->setterCache[$className]; |
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| 102 | } |
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| 103 | |||
| 104 | $attributes = []; |
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| 105 | |||
| 106 | $reflectionMethods = $reflectionClass->getMethods($this->methodFlags); |
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| 107 | foreach ($reflectionMethods as $method) { |
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| 108 | if (!$this->isSetMethod($method)) { |
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| 109 | continue; |
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| 110 | } |
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| 111 | |||
| 112 | $attributeName = lcfirst(substr($method->name, 3)); |
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| 113 | $method->setAccessible(true); |
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| 114 | $attributes[$attributeName][] = $method; |
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| 115 | } |
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| 116 | |||
| 117 | $reflectionProperties = $reflectionClass->getProperties($this->propertyFlags); |
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| 118 | foreach ($reflectionProperties as $property) { |
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| 119 | $attributeName = $property->getName(); |
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| 120 | $property->setAccessible(true); |
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| 121 | $attributes[$attributeName][] = $property; |
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| 122 | } |
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| 123 | |||
| 124 | return $this->setterCache[$className] = $attributes; |
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| 125 | } |
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| 126 | |||
| 127 | public function getGetterFields(ReflectionClass $reflectionClass): array |
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| 128 | { |
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| 129 | return array_keys($this->getGetterMapping($reflectionClass)); |
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| 130 | } |
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| 131 | |||
| 132 | public function getSetterFields(ReflectionClass $reflectionClass): array |
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| 133 | { |
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| 134 | return array_keys($this->getSetterMapping($reflectionClass)); |
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| 135 | } |
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| 136 | |||
| 137 | /** |
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| 138 | * Checks if a method's name is get.* or is.*, and can be called without parameters. |
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| 139 | */ |
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| 140 | protected function isGetMethod(\ReflectionMethod $method): bool |
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| 141 | { |
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| 142 | $methodLength = \strlen($method->name); |
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| 143 | |||
| 144 | return |
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| 145 | !$method->isStatic() && |
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| 146 | ( |
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| 147 | ((0 === strpos($method->name, 'get') && 3 < $methodLength) || |
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| 148 | (0 === strpos($method->name, 'is') && 2 < $methodLength) || |
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| 149 | (0 === strpos($method->name, 'has') && 3 < $methodLength)) && |
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| 150 | 0 === $method->getNumberOfRequiredParameters() |
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| 151 | ); |
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| 152 | } |
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| 153 | |||
| 154 | /** |
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| 155 | * Checks if a method's name is set.* with 0 or 1 parameters. |
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| 156 | */ |
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| 157 | protected function isSetMethod(\ReflectionMethod $method): bool |
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| 158 | { |
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| 159 | $methodLength = strlen($method->name); |
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| 160 | |||
| 161 | return |
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| 162 | !$method->isStatic() && |
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| 163 | ( |
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| 164 | (0 === strpos($method->name, 'set') && 3 < $methodLength) |
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| 165 | && 2 > $method->getNumberOfRequiredParameters() |
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| 166 | ); |
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| 167 | } |
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| 168 | |||
| 169 | /** |
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| 170 | * @param ReflectionClass $reflectionClass |
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| 171 | * @param string $fieldName |
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| 172 | * @return Type[] |
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| 173 | */ |
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| 174 | public function getGetterTypes(ReflectionClass $reflectionClass, string $fieldName): array |
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| 175 | { |
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| 176 | $mapping = $this->getGetterMapping($reflectionClass); |
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| 177 | if (!isset($mapping[$fieldName])) { |
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| 178 | throw new NameNotFoundException($fieldName); |
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| 179 | } |
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| 180 | $res = TypeUtils::convertToTypeArray($mapping[$fieldName]); |
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| 181 | return $this->buildTypes($res, $reflectionClass, $fieldName, 'getSetterMapping'); |
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| 182 | } |
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| 183 | |||
| 184 | /** |
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| 185 | * Returns description of a field name. |
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| 186 | * |
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| 187 | * @TODO: make a difference between getters and setters |
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| 188 | * |
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| 189 | * @param ReflectionClass $reflectionClass |
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| 190 | * @param string $fieldName |
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| 191 | * @param bool $preferGetters |
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| 192 | * @return string|null |
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| 193 | */ |
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| 194 | public function getDescription(ReflectionClass $reflectionClass, string $fieldName, bool $preferGetters): ?string |
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| 197 | } |
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| 198 | |||
| 199 | public function getSetterTypes(ReflectionClass $reflectionClass, string $fieldName): array |
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| 200 | { |
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| 201 | $mapping = $this->getSetterMapping($reflectionClass); |
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| 202 | if (!isset($mapping[$fieldName])) { |
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| 203 | throw new NameNotFoundException($fieldName); |
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| 204 | } |
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| 205 | $res = TypeUtils::convertToTypeArray($mapping[$fieldName]); |
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| 206 | return $this->buildTypes($res, $reflectionClass, $fieldName, 'getGetterMapping'); |
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| 207 | } |
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| 208 | |||
| 209 | private function buildTypes(array $types, ReflectionClass $reflectionClass, string $fieldName, ?string $methodOnEmptyResult) |
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| 210 | { |
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| 211 | $phpDocTypes = $this->phpDocExtractor->getTypes($reflectionClass->getName(), $fieldName) ?? []; |
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| 212 | foreach ($phpDocTypes as $type) { |
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| 213 | $types[] = $type; |
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| 214 | } |
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| 215 | // fallback checking getters/setters if no typehint was given. |
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| 216 | if (empty($types) && $methodOnEmptyResult) { |
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| 217 | $mapping = $this->$methodOnEmptyResult($reflectionClass); |
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| 218 | if (!isset($mapping[$fieldName])) { |
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| 219 | return []; |
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| 220 | } |
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| 221 | $res = TypeUtils::convertToTypeArray($mapping[$fieldName]); |
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| 222 | return $this->buildTypes($res, $reflectionClass, $fieldName, null); |
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| 223 | } |
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| 224 | return $this->unique($types); |
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| 225 | } |
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| 226 | |||
| 227 | /** |
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| 228 | * @param Type[] $input |
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| 229 | * @return Type[] |
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| 230 | */ |
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| 231 | private function unique(array $input): array |
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| 232 | { |
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| 233 | $res = []; |
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| 234 | foreach ($input as $type) { |
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| 235 | $key = $this->key($type); |
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| 236 | $res[$key] = $type; |
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| 237 | |||
| 238 | } |
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| 239 | return array_values($res); |
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| 240 | } |
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| 241 | |||
| 242 | private function key(Type $type, int $recursion = 0): string |
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| 243 | { |
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| 244 | $data = [ |
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| 245 | 'built_in' => $type->getBuiltinType(), |
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| 246 | 'class_name' => $type->getClassName(), |
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| 247 | 'collection' => $type->isCollection(), |
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| 248 | 'nullable' => $type->isNullable(), |
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| 249 | ]; |
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| 250 | $keyType = $type->getCollectionKeyType(); |
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| 251 | if ($keyType && $recursion < 2) { |
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| 252 | $data['key_type'] = $this->key($keyType, $recursion + 1); |
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| 253 | } |
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| 254 | $valueType = $type->getCollectionValueType(); |
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| 255 | if ($keyType && $recursion < 2) { |
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| 256 | $data['value_type'] = $this->key($valueType, $recursion + 1); |
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|
Bug
introduced
by
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| 257 | } |
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| 258 | return json_encode($data); |
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| 259 | } |
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| 260 | |||
| 261 | public function getValue(object $instance, string $fieldName) |
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| 262 | { |
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| 263 | $mapping = $this->getGetterMapping(new ReflectionClass($instance)); |
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| 264 | if (!isset($mapping[$fieldName])) { |
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| 265 | throw new NameNotFoundException($fieldName); |
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| 266 | } |
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| 267 | $error = null; |
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| 268 | foreach ($mapping[$fieldName] as $option) { |
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| 269 | if ($option instanceof ReflectionMethod) { |
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| 270 | try { |
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| 271 | return $option->invoke($instance); |
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| 272 | } catch (Throwable $throwable) { |
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| 273 | $error = new ObjectAccessException($option, $fieldName, $throwable); |
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| 274 | } |
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| 275 | } |
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| 276 | if ($option instanceof ReflectionProperty) { |
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| 277 | if ($error) { |
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| 278 | throw $error; |
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| 279 | } |
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| 280 | return $option->getValue($instance); |
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| 281 | } |
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| 282 | } |
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| 283 | throw $error ?? new NameNotFoundException($fieldName); |
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| 284 | } |
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| 285 | |||
| 286 | public function setValue(object $instance, string $fieldName, $value) |
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| 287 | { |
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| 288 | $mapping = $this->getSetterMapping(new ReflectionClass($instance)); |
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| 289 | if (!isset($mapping[$fieldName])) { |
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| 290 | throw new NameNotFoundException($fieldName); |
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| 291 | } |
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| 292 | $error = null; |
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| 293 | foreach ($mapping[$fieldName] as $option) { |
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| 294 | if ($option instanceof ReflectionMethod) { |
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| 295 | try { |
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| 296 | return $option->invoke($instance, $value); |
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| 297 | } catch (Throwable $throwable) { |
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| 298 | $error = new ObjectWriteException($option, $fieldName, $throwable); |
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| 299 | } |
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| 300 | } |
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| 301 | if ($option instanceof ReflectionProperty) { |
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| 302 | if ($error) { |
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| 303 | throw $error; |
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| 304 | } |
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| 305 | try { |
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| 306 | return $option->setValue($instance, $value); |
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| 307 | } catch (Throwable $throwable) { |
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| 308 | $error = new ObjectWriteException($option, $fieldName, $throwable); |
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| 309 | } |
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| 310 | } |
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| 311 | } |
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| 312 | throw $error ?? new NameNotFoundException($fieldName); |
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| 313 | } |
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| 314 | |||
| 315 | public function getConstructorArguments(ReflectionClass $reflectionClass): array |
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| 316 | { |
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| 317 | $constructor = $reflectionClass->getConstructor(); |
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| 318 | if (!$constructor) { |
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| 319 | return []; |
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| 320 | } |
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| 321 | $res = []; |
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| 322 | foreach ($constructor->getParameters() as $parameter) { |
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| 323 | $type = $parameter->getType(); |
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| 324 | if ($type) { |
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| 325 | if ($type->isBuiltin()) { |
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| 326 | $res[$parameter->name] = new Type($type->getName(), $type->allowsNull()); |
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| 327 | } else { |
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| 328 | $res[$parameter->name] = new Type(Type::BUILTIN_TYPE_OBJECT, $type->allowsNull(), $type->getName()); |
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| 329 | } |
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| 330 | } else { |
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| 331 | $res[$parameter->name] = $this->guessType($reflectionClass, $parameter); |
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| 332 | } |
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| 333 | } |
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| 334 | return $res; |
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| 335 | } |
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| 336 | |||
| 337 | private function guessType(ReflectionClass $reflectionClass, ReflectionParameter $parameter): ?Type |
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| 338 | { |
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| 339 | $types = $this->getGetterMapping($reflectionClass)[$parameter->name] ?? []; |
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| 340 | $res = []; |
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| 341 | if (empty($types)) { |
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| 342 | $types = $this->getSetterMapping($reflectionClass)[$parameter->name] ?? []; |
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| 343 | if (empty($types)) { |
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| 344 | return null; |
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| 345 | } else { |
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| 346 | $res = $this->getSetterTypes($reflectionClass, $parameter->name); |
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| 347 | } |
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| 348 | } else { |
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| 349 | $res = $this->getGetterTypes($reflectionClass, $parameter->name); |
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| 350 | } |
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| 351 | return reset($res) ? : null; |
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| 352 | } |
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| 353 | |||
| 354 | public function instantiate(ReflectionClass $reflectionClass, array $constructorArgs): object |
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| 357 | } |
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| 358 | } |
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| 359 |
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