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<?php declare(strict_types=1); |
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namespace Stratadox\PhpGenerics\Dissector; |
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use Doctrine\Common\Annotations\Reader; |
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use ReflectionClass; |
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use ReflectionException; |
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use Stratadox\PhpGenerics\Annotation\Generic; |
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use Stratadox\PhpGenerics\Dissector\Error\BaseClassIsNotGeneric; |
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use Stratadox\PhpGenerics\Dissector\Error\MissingTypeArgument; |
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use Stratadox\PhpGenerics\Dissector\Error\TypeArgumentNotFound; |
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use Stratadox\PhpGenerics\Dissector\Error\UnexpectedTypeArgument; |
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use Stratadox\PhpGenerics\Loader; |
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use Stratadox\PhpGenerics\Primitives; |
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use function assert; |
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use function class_exists; |
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use function count; |
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use function implode; |
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use function sprintf; |
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use function strrchr; |
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use function substr; |
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final class AnnotationArgumentDeduction implements ArgumentDeduction |
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{ |
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/** @var Reader */ |
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private $annotation; |
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/** @var Primitives */ |
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private $primitives; |
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/** @var string */ |
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private $separator; |
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/** @var TypeDissector|null */ |
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private $dissect; |
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/** @var Loader */ |
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private $loader; |
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public function __construct( |
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Reader $annotation, |
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Primitives $primitives, |
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string $separator, |
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Loader $loader |
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) { |
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$this->annotation = $annotation; |
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$this->primitives = $primitives; |
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$this->separator = $separator; |
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$this->loader = $loader; |
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} |
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public function setDissector(TypeDissector $dissector): void |
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{ |
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assert(null === $this->dissect); |
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$this->dissect = $dissector; |
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} |
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public function for( |
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string $namespace, |
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string $baseClass, |
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string $callingFile, |
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string ...$types |
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): array { |
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assert(null !== $this->dissect); |
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$baseAnnotation = $this->annotationOf($baseClass); |
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if ($baseAnnotation === null) { |
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throw BaseClassIsNotGeneric::cannotUse($baseClass); |
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} |
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$expectedCount = $baseAnnotation->count; |
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$typeArguments = []; |
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$skip = 0; |
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$genericTypeArgument = []; |
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foreach ($types as $type) { |
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$annotation = $this->annotationOf($type); |
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if ($annotation !== null) { |
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$skip += $annotation->count + ($skip === 0 ? 1 : 0); |
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} |
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if ($skip > 0) { |
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$genericTypeArgument[] = $this->shortNameOf($type); |
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$skip--; |
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if ($skip === 0) { |
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$genericType = sprintf( |
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'%s\\%s', |
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$namespace, |
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implode($this->separator, $genericTypeArgument) |
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); |
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$this->loader->generate($this->dissect->typesFromFile( |
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$genericType, |
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$callingFile |
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)); |
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// @todo reset $genericTypeArgument |
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$typeArguments[] = $genericType; |
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} |
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continue; |
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} |
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if (!$this->primitives->includes($type) && !class_exists($type)) { |
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throw TypeArgumentNotFound::for($type, $baseClass, count($typeArguments)); |
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} |
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$typeArguments[] = $type; |
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} |
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if (count($typeArguments) > $expectedCount) { |
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throw UnexpectedTypeArgument::for($baseClass, count($typeArguments) - 1); |
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} |
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if (count($typeArguments) < $expectedCount) { |
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throw MissingTypeArgument::for($baseClass, count($typeArguments)); |
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} |
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return $typeArguments; |
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} |
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private function annotationOf(string $class): ?Generic |
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{ |
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try { |
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$annotation = $this->annotation->getClassAnnotation( |
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new ReflectionClass($class), |
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Generic::class |
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); |
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} catch (ReflectionException $e) { |
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return null; |
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} |
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assert($annotation instanceof Generic || $annotation === null); |
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return $annotation; |
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} |
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private function shortNameOf(string $fqcn): string |
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{ |
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return substr(strrchr('\\' . $fqcn, '\\'), 1); |
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} |
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} |
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Stratadox /
PhpGenerics
Loading history...
This check looks for function or method calls that always return null and whose return value is assigned to a variable.
The method
getObject()can return nothing but null, so it makes no sense to assign that value to a variable.The reason is most likely that a function or method is imcomplete or has been reduced for debug purposes.