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<?php |
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declare(strict_types = 1); |
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/* |
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* Go! AOP framework |
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* |
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* @copyright Copyright 2012, Lisachenko Alexander <[email protected]> |
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* |
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* This source file is subject to the license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Go\Core; |
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use Doctrine\Common\Annotations\Reader; |
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use Go\Aop\Advisor; |
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use Go\Aop\Aspect; |
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use Go\Aop\Pointcut; |
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use Reflector; |
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/** |
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* Loader of aspects into the container |
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*/ |
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class AspectLoader |
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{ |
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/** |
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* Aspect container instance |
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*/ |
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protected $container; |
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/** |
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* List of aspect loaders |
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* |
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* @var array |
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*/ |
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protected $loaders = []; |
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/** |
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* Annotation reader for aspects |
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*/ |
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protected $annotationReader; |
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/** |
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* List of aspects that was loaded |
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* |
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* @var array |
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*/ |
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protected $loadedAspects = []; |
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/** |
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* Loader constructor |
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*/ |
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public function __construct(AspectContainer $container, Reader $reader) |
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{ |
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$this->container = $container; |
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$this->annotationReader = $reader; |
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} |
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/** |
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* Register an aspect loader extension |
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* |
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* This method allows to extend the logic of aspect loading by registering an extension for loader. |
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*/ |
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public function registerLoaderExtension(AspectLoaderExtension $loader): void |
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{ |
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$targets = $loader->getTargets(); |
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foreach ($targets as $target) { |
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$this->loaders[$target][] = $loader; |
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} |
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} |
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/** |
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* Loads an aspect with the help of aspect loaders, but don't register it in the container |
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* |
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* @see loadAndRegister() method for registration |
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* |
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* @return Pointcut[]|Advisor[] |
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*/ |
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public function load(Aspect $aspect): array |
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{ |
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$loadedItems = []; |
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$refAspect = new \ReflectionClass($aspect); |
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if (!empty($this->loaders[AspectLoaderExtension::TARGET_CLASS])) { |
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$loadedItems += $this->loadFrom($aspect, $refAspect, $this->loaders[AspectLoaderExtension::TARGET_CLASS]); |
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} |
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if (!empty($this->loaders[AspectLoaderExtension::TARGET_METHOD])) { |
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$refMethods = $refAspect->getMethods(); |
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foreach ($refMethods as $refMethod) { |
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$loadedItems += $this->loadFrom($aspect, $refMethod, $this->loaders[AspectLoaderExtension::TARGET_METHOD]); |
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} |
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} |
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if (!empty($this->loaders[AspectLoaderExtension::TARGET_PROPERTY])) { |
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$refProperties = $refAspect->getProperties(); |
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foreach ($refProperties as $refProperty) { |
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$loadedItems += $this->loadFrom($aspect, $refProperty, $this->loaders[AspectLoaderExtension::TARGET_PROPERTY]); |
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} |
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} |
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return $loadedItems; |
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} |
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/** |
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* Loads and register all items of aspect in the container |
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*/ |
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public function loadAndRegister(Aspect $aspect): void |
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{ |
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$loadedItems = $this->load($aspect); |
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foreach ($loadedItems as $itemId => $item) { |
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if ($item instanceof Pointcut) { |
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$this->container->registerPointcut($item, $itemId); |
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} |
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if ($item instanceof Advisor) { |
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$this->container->registerAdvisor($item, $itemId); |
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} |
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} |
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$aspectClass = get_class($aspect); |
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$this->loadedAspects[$aspectClass] = $aspectClass; |
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} |
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/** |
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* Returns list of unloaded aspects in the container |
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* |
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* @return Aspect[] |
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*/ |
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public function getUnloadedAspects(): array |
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{ |
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$unloadedAspects = []; |
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foreach ($this->container->getByTag('aspect') as $aspect) { |
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if (!isset($this->loadedAspects[get_class($aspect)])) { |
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$unloadedAspects[] = $aspect; |
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} |
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} |
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return $unloadedAspects; |
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} |
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/** |
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* Load definitions from specific aspect part into the aspect container |
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* |
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* @param Aspect $aspect Aspect instance |
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* @param Reflector $reflector Reflection instance |
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* @param array|AspectLoaderExtension[] $loaders List of loaders that can produce advisors from aspect class |
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* |
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* @throws \InvalidArgumentException If kind of loader isn't supported |
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* |
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* @return array|Pointcut[]|Advisor[] |
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*/ |
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protected function loadFrom(Aspect $aspect, Reflector $reflector, array $loaders): array |
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{ |
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$loadedItems = []; |
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foreach ($loaders as $loader) { |
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$loaderKind = $loader->getKind(); |
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switch ($loaderKind) { |
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case AspectLoaderExtension::KIND_REFLECTION: |
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if ($loader->supports($aspect, $reflector)) { |
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$loadedItems += $loader->load($aspect, $reflector); |
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} |
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break; |
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case AspectLoaderExtension::KIND_ANNOTATION: |
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$annotations = $this->getAnnotations($reflector); |
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foreach ($annotations as $annotation) { |
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if ($loader->supports($aspect, $reflector, $annotation)) { |
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$loadedItems += $loader->load($aspect, $reflector, $annotation); |
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} |
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} |
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break; |
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default: |
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throw new \InvalidArgumentException("Unsupported loader kind {$loaderKind}"); |
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} |
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} |
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return $loadedItems; |
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} |
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/** |
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* Return list of annotations for reflection point |
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* |
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* @return array list of annotations |
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* @throws \InvalidArgumentException if $reflector is unsupported |
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*/ |
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protected function getAnnotations(Reflector $reflector): array |
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{ |
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switch (true) { |
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case ($reflector instanceof \ReflectionClass): |
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return $this->annotationReader->getClassAnnotations($reflector); |
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case ($reflector instanceof \ReflectionMethod): |
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return $this->annotationReader->getMethodAnnotations($reflector); |
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case ($reflector instanceof \ReflectionProperty): |
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return $this->annotationReader->getPropertyAnnotations($reflector); |
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default: |
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throw new \InvalidArgumentException('Unsupported reflection point ' . get_class($reflector)); |
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} |
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} |
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} |
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goaop /
framework
