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<?php declare(strict_types=1); |
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namespace Stratadox\Hydrator; |
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use InvalidArgumentException; |
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use ReflectionClass; |
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use ReflectionObject; |
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use function sprintf; |
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use function strlen; |
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use function strpos; |
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use function substr; |
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use Throwable; |
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/** |
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* Hydrates properties in a specific scope by deconstructing the input. |
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* |
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* Useful in the specific case where a child class has a private property, while |
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* its parent(s) also have a private property by that very same name. |
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* In those edge cases, the reflective hydrator cannot correctly determine the |
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* property scope, nor would client code be able to pass both properties in the |
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* same map. |
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* This hydrator avoids that problem by requiring an explicit scope in the form |
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* of one or more subsequent prefixes, for example: |
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* `{"property": "foo", "parent.property": "bar"}` |
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* |
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* @package Stratadox\Hydrate |
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* @author Stratadox |
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*/ |
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final class ScopedHydrator implements Hydrates |
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{ |
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private $prefix; |
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private $prefixLength; |
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private function __construct(string $prefix) |
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{ |
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$this->prefix = $prefix; |
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$this->prefixLength = strlen($prefix); |
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if (!$this->prefixLength) { |
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throw new InvalidArgumentException( |
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'The prefix for the scoped hydrator cannot be empty.' |
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); |
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} |
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} |
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/** |
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* Produce a scoped hydrator. |
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* |
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* @return Hydrates A hydrator that uses prefixes to determine the scopes. |
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*/ |
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public static function default(): Hydrates |
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{ |
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return new self('parent.'); |
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} |
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/** |
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* Produce a scoped hydrator with a custom prefix. |
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* |
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* @param string $prefix The prefix to determine the parental scope. |
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* @return ScopedHydrator A hydrator that uses the custom prefix. |
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*/ |
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public static function prefixedWith(string $prefix): self |
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{ |
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return new self($prefix); |
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} |
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/** @inheritdoc */ |
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public function writeTo(object $target, array $data): void |
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{ |
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$object = new ReflectionObject($target); |
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foreach ($data as $name => $value) { |
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try { |
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$this->write($object, $target, $name, $value); |
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} catch (Throwable $exception) { |
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throw HydrationFailed::encountered($exception, $target); |
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} |
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} |
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} |
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private function write( |
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ReflectionClass $class, |
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object $target, |
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string $propertyName, |
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$value |
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): void { |
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$name = $propertyName; |
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while (strpos($name, $this->prefix) === 0) { |
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$name = substr($name, $this->prefixLength); |
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$class = $class->getParentClass(); |
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if (!$class) { |
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throw new InvalidArgumentException(sprintf( |
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'It has no %s.', |
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$propertyName |
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)); |
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} |
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} |
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$property = $class->getProperty($name); |
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$property->setAccessible(true); |
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$property->setValue($target, $value); |
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} |
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} |
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Stratadox /
Hydrator
