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<?php |
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declare(strict_types = 1); |
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namespace Innmind\Reflection\Instanciator; |
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use Innmind\Reflection\{ |
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InstanciatorInterface, |
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Exception\InstanciationFailedException |
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}; |
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use Innmind\Immutable\{ |
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MapInterface, |
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SetInterface, |
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Map, |
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Set |
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}; |
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class ReflectionInstanciator implements InstanciatorInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function build(string $class, MapInterface $properties) |
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{ |
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try { |
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$refl = new \ReflectionClass($class); |
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if (!$refl->hasMethod('__construct')) { |
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return $refl->newInstance(); |
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} |
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$constructor = $refl->getMethod('__construct'); |
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return $refl->newInstanceArgs( |
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$this |
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->computeArguments($constructor, $properties) |
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->reduce( |
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[], |
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function(array $carry, string $property, $value): array { |
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$carry[$property] = $value; |
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return $carry; |
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} |
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) |
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); |
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} catch (\TypeError $e) { |
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throw new InstanciationFailedException( |
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sprintf( |
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'Class "%s" cannot be instanciated', |
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$class |
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), |
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$e->getCode(), |
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$e |
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); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function parameters(string $class): SetInterface |
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{ |
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$parameters = new Set('string'); |
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$refl = new \ReflectionClass($class); |
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if (!$refl->hasMethod('__construct')) { |
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return $parameters; |
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} |
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$refl = $refl->getMethod('__construct'); |
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foreach ($refl->getParameters() as $parameter) { |
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$parameters = $parameters->add($parameter->name); |
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} |
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return $parameters; |
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} |
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/** |
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* @param ReflectionMethod $constructor |
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* @param MapInterface<string, variable> $properties |
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* |
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* @return MapInterface<string, variable> |
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*/ |
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private function computeArguments( |
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\ReflectionMethod $constructor, |
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MapInterface $properties |
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): MapInterface { |
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$arguments = $properties->clear(); |
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foreach ($constructor->getParameters() as $parameter) { |
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if ($this->canInject($parameter, $properties)) { |
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$arguments = $arguments->put( |
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$parameter->name, |
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$properties->get($parameter->name) |
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); |
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} |
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} |
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return $arguments; |
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} |
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/** |
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* @param ReflectionParameter $parameter |
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* @param MapInterface<string, variable> $properties |
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* |
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* @return bool |
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*/ |
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private function canInject( |
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\ReflectionParameter $parameter, |
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MapInterface $properties |
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): bool { |
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if ( |
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!$parameter->allowsNull() && |
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!$properties->contains($parameter->name) |
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) { |
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return false; |
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} else if ( |
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$parameter->allowsNull() && |
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!$properties->contains($parameter->name) |
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) { |
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return false; |
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} |
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$property = $properties->get($parameter->name); |
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if ($parameter->hasType()) { |
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$type = $parameter->getType(); |
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if ($type->isBuiltin()) { |
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return (string) $type === gettype($property); |
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} else if (!is_object($property)) { |
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return false; |
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} |
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$refl = new \ReflectionObject($property); |
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$wishedClass = (string) $type; |
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return get_class($property) === $wishedClass || |
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$refl->isSubClassOf($wishedClass); |
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} |
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return true; |
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} |
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} |
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Innmind /
Reflection
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