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<?php |
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/* |
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* Go! AOP framework |
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* |
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* @copyright Copyright 2011, 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\Aop\Framework; |
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use ReflectionFunction; |
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use ReflectionMethod; |
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use Go\Aop\Aspect; |
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use Go\Aop\Intercept\Joinpoint; |
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use Go\Core\AspectKernel; |
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/** |
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* Base class for all framework advices implementations |
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* |
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* This class describe an action taken by the AOP framework at a particular |
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* joinpoint. Different types of advice include "around", "before" and "after" |
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* advices. |
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* |
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* Around advice is an advice that surrounds a joinpoint such as a method |
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* invocation. This is the most powerful kind of advice. Around advices will |
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* perform custom behavior before and after the method invocation. They are |
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* responsible for choosing whether to proceed to the joinpoint or to shortcut |
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* executing by returning their own return value or throwing an exception. |
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* After and before advices are simple closures that will be invoked after and |
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* before main invocation. |
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* Framework model an advice as an PHP-closure interceptor, maintaining a |
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* chain of interceptors "around" the joinpoint: |
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* function (Joinpoint $joinPoint) { |
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* echo 'Before action'; |
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* // call chain here with Joinpoint->proceed() method |
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* $result = $joinPoint->proceed(); |
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* echo 'After action'; |
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* return $result; |
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* } |
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*/ |
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abstract class BaseAdvice implements OrderedAdvice |
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{ |
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/** |
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* Advice order |
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* |
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* @var int |
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*/ |
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protected $order = 0; |
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/** |
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* Local cache of advices for faster unserialization on big projects |
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* |
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* @var array |
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*/ |
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protected static $localAdvicesCache = []; |
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/** |
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* Returns the advice order |
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* |
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* @return int |
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*/ |
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public function getAdviceOrder() |
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{ |
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return $this->order; |
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} |
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/** |
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* Serialize advice method into array |
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* |
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* @param callable|\Closure $adviceMethod An advice for aspect |
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* |
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* @return array |
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*/ |
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public static function serializeAdvice($adviceMethod) |
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{ |
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$refAdvice = new ReflectionFunction($adviceMethod); |
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$refVariables = $refAdvice->getStaticVariables(); |
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$scope = 'aspect'; |
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if (isset($refVariables['scope'])) { |
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$scope = $refVariables['scope']; |
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$refAdvice = new ReflectionFunction($refVariables['adviceCallback']); |
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} |
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return array( |
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'scope' => $scope, |
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'method' => $refAdvice->name, |
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'aspect' => get_class($refAdvice->getClosureThis()) |
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); |
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} |
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/** |
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* Unserialize an advice |
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* |
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* @param array $adviceData Information about advice |
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* |
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* @return callable|\Closure |
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*/ |
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public static function unserializeAdvice($adviceData) |
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{ |
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$aspectName = $adviceData['aspect']; |
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$methodName = $adviceData['method']; |
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$scope = $adviceData['scope']; |
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if (!isset(static::$localAdvicesCache["$aspectName->$methodName"]['aspect'])) { |
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$refMethod = new ReflectionMethod($aspectName, $methodName); |
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$aspect = AspectKernel::getInstance()->getContainer()->getAspect($aspectName); |
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$advice = $refMethod->getClosure($aspect); |
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static::$localAdvicesCache["$aspectName->$methodName"]['aspect'] = $advice; |
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} |
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if ($scope !== 'aspect' && !isset(static::$localAdvicesCache["$aspectName->$methodName"][$scope])) { |
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$aspect = AspectKernel::getInstance()->getContainer()->getAspect($aspectName); |
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$advice = static::$localAdvicesCache["$aspectName->$methodName"]['aspect']; |
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$advice = static::createScopeCallback($aspect, $advice, $scope); |
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static::$localAdvicesCache["$aspectName->$methodName"][$scope] = $advice; |
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} |
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return static::$localAdvicesCache["$aspectName->$methodName"][$scope]; |
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} |
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/** |
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* Creates an advice with respect to the desired scope |
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* |
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* @param Aspect $aspect |
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* @param \Closure $adviceCallback Advice to call |
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* @param string $scope Scope for callback |
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* |
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* @throws \InvalidArgumentException is scope is not supported |
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* @return callable |
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*/ |
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public static function createScopeCallback(Aspect $aspect, \Closure $adviceCallback, $scope) |
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{ |
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switch ($scope) { |
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case 'aspect': |
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return $adviceCallback; |
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case 'proxy': |
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return function(Joinpoint $joinpoint) use ($aspect, $adviceCallback) { |
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$instance = $joinpoint->getThis(); |
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$isNotObject = $instance !== (object) $instance; |
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$target = $isNotObject ? $instance : get_class($instance); |
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$callback = $adviceCallback->bindTo($aspect, $target); |
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return $callback($joinpoint); |
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}; |
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case 'target': |
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return function(Joinpoint $joinpoint) use ($aspect, $adviceCallback) { |
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$instance = $joinpoint->getThis(); |
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$isNotObject = $instance !== (object) $instance; |
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$target = $isNotObject ? $instance : get_parent_class($instance); |
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$callback = $adviceCallback->bindTo($aspect, $target); |
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return $callback($joinpoint); |
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}; |
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default: |
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return function(Joinpoint $joinpoint) use ($aspect, $adviceCallback, $scope) { |
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$callback = $adviceCallback->bindTo($aspect, $scope); |
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return $callback($joinpoint); |
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}; |
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} |
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} |
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} |
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goaop /
framework
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