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<?php |
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/** |
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* This file is part of the Cubiche package. |
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* |
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* Copyright (c) Cubiche |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Cubiche\Core\Visitor; |
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/** |
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* Abstract Dynamic Dispatch Visitor Class. |
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* |
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* @author Karel Osorio Ramírez <[email protected]> |
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*/ |
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abstract class DynamicDispatchVisitor implements DynamicDispatchVisitorInterface |
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{ |
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/** |
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* @var \ReflectionMethod[] |
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*/ |
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private $visitorMethods = null; |
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/** |
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* @var \ReflectionMethod[] |
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*/ |
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private $handlerMethods = array(); |
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/** |
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* @var ResolverVisitorMethodInterface |
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*/ |
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protected $resolver; |
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/** |
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* @param ResolverVisitorMethodInterface $resolver |
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*/ |
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public function __construct(ResolverVisitorMethodInterface $resolver = null) |
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{ |
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$this->resolver = $resolver === null ? new ResolverVisitorMethod() : $resolver; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function canHandlerVisitee(VisiteeInterface $visitee) |
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{ |
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return $this->handlerMethod($visitee) !== null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function visit(VisiteeInterface $visitee) |
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{ |
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return $this->visitWith($visitee, \func_get_args()); |
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} |
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/** |
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* @param VisiteeInterface $visitee |
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* @param array $args |
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* |
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* @return mixed |
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*/ |
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protected function visitWith(VisiteeInterface $visitee, array $args) |
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{ |
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$method = $this->handlerMethod($visitee); |
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if ($method !== null) { |
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return $method->invokeArgs($this, $args); |
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} |
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throw $this->notSupportedVisiteeException($visitee); |
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} |
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/** |
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* @param VisiteeInterface $visitee |
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* |
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* @return \LogicException |
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*/ |
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protected function notSupportedVisiteeException(VisiteeInterface $visitee) |
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{ |
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return new \LogicException( |
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\sprintf('The %s visitee is not supported by %s visitor', \get_class($visitee), static::class) |
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); |
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} |
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/** |
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* @param VisiteeInterface $visitee |
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* |
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* @return \ReflectionMethod|null |
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*/ |
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private function handlerMethod(VisiteeInterface $visitee) |
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{ |
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$class = new \ReflectionClass(\get_class($visitee)); |
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if (isset($this->handlerMethods[$class->name])) { |
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return $this->handlerMethods[$class->name]; |
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} |
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if ($this->visitorMethods === null) { |
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$this->visitorMethods = $this->visitorMethods(); |
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} |
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return $this->findHandlerMethod($class); |
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} |
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/** |
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* @param \ReflectionClass $class |
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* |
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* @return \ReflectionMethod|null |
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*/ |
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private function findHandlerMethod(\ReflectionClass $class) |
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{ |
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$current = $class; |
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while ($current !== false) { |
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if (isset($this->visitorMethods[$current->name])) { |
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$this->handlerMethods[$class->name] = $this->visitorMethods[$current->name]; |
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return $this->handlerMethods[$class->name]; |
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} |
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$current = $current->getParentClass(); |
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} |
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return; |
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} |
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/** |
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* @return \ReflectionMethod[] |
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*/ |
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private function visitorMethods() |
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{ |
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$visitorMethods = array(); |
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$reflection = new \ReflectionClass(static::class); |
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/** @var \ReflectionMethod $method */ |
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foreach ($reflection->getMethods() as $method) { |
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if ($method->getName() !== 'visit') { |
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$visiteeClass = $this->resolver->resolveVisiteeClass($method); |
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if ($visiteeClass !== null) { |
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$visitorMethods[$visiteeClass->getName()] = $method; |
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} |
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} |
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} |
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return $visitorMethods; |
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} |
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} |
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cubiche /
visitor
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