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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Factory\Definition; |
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use ReflectionClass; |
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use ReflectionFunctionAbstract; |
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use ReflectionNamedType; |
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use ReflectionParameter; |
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use ReflectionUnionType; |
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use Yiisoft\Factory\Exception\NotInstantiableException; |
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/** |
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* This class resolves dependencies by using class type hints. |
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* Note that service names need not match the parameter names, parameter names are ignored |
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* |
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* @internal |
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*/ |
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final class DefinitionExtractor |
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{ |
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private static ?self $instance = null; |
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private function __construct() |
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{ |
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} |
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public static function getInstance(): self |
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{ |
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if (self::$instance === null) { |
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self::$instance = new self(); |
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} |
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return self::$instance; |
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} |
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/** |
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* @psalm-param class-string $class |
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* |
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* @return DefinitionInterface[] |
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* @psalm-return array<string, DefinitionInterface> |
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*/ |
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public function fromClassName(string $class): array |
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{ |
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$reflectionClass = new ReflectionClass($class); |
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if (!$reflectionClass->isInstantiable()) { |
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throw new NotInstantiableException($class); |
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} |
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$constructor = $reflectionClass->getConstructor(); |
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return $constructor === null ? [] : $this->fromFunction($constructor); |
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} |
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/** |
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* @return DefinitionInterface[] |
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* @psalm-return array<string, DefinitionInterface> |
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*/ |
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private function fromFunction(ReflectionFunctionAbstract $reflectionFunction): array |
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{ |
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$result = []; |
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foreach ($reflectionFunction->getParameters() as $parameter) { |
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$result[$parameter->getName()] = $this->fromParameter($parameter); |
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} |
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return $result; |
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} |
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private function fromParameter(ReflectionParameter $parameter): DefinitionInterface |
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{ |
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$type = $parameter->getType(); |
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if ($parameter->isVariadic()) { |
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return $this->createParameterDefinition($parameter); |
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} |
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// PHP 8 union type is used as type hint |
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/** @psalm-suppress UndefinedClass, TypeDoesNotContainType */ |
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if ($type instanceof ReflectionUnionType) { |
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$types = []; |
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/** @var ReflectionNamedType $unionType */ |
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foreach ($type->getTypes() as $unionType) { |
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if (!$unionType->isBuiltin()) { |
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$typeName = $unionType->getName(); |
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if ($typeName === 'self') { |
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// If type name is "self", it means that called class and |
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// $parameter->getDeclaringClass() returned instance of `ReflectionClass`. |
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/** @psalm-suppress PossiblyNullReference */ |
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$typeName = $parameter->getDeclaringClass()->getName(); |
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} |
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$types[] = $typeName; |
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} |
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} |
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/** @psalm-suppress MixedArgument */ |
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return new ClassDefinition(implode('|', $types), $type->allowsNull()); |
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} |
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/** @var ReflectionNamedType|null $type */ |
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// Our parameter has a class type hint |
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if ($type !== null && !$type->isBuiltin()) { |
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$typeName = $type->getName(); |
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if ($typeName === 'self') { |
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// If type name is "self", it means that called class and |
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// $parameter->getDeclaringClass() returned instance of `ReflectionClass`. |
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/** @psalm-suppress PossiblyNullReference */ |
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$typeName = $parameter->getDeclaringClass()->getName(); |
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} |
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return new ClassDefinition($typeName, $type->allowsNull()); |
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} |
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// Our parameter does not have a class type hint and either has a default value or is nullable. |
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return $this->createParameterDefinition($parameter); |
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} |
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private function createParameterDefinition(ReflectionParameter $parameter): ParameterDefinition |
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{ |
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$definition = new ParameterDefinition($parameter); |
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if ($parameter->isDefaultValueAvailable()) { |
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$definition->setValue($parameter->getDefaultValue()); |
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} elseif (!$parameter->isVariadic()) { |
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$definition->setValue(null); |
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} |
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return $definition; |
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} |
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} |
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yiisoft /
factory
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