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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 2013, 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\Proxy; |
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use Go\Aop\Advice; |
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use Go\Aop\Framework\ReflectionFunctionInvocation; |
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use Go\Aop\Intercept\FunctionInvocation; |
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use Go\Core\AspectContainer; |
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use Go\Core\AspectKernel; |
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use Go\Core\LazyAdvisorAccessor; |
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use Go\ParserReflection\ReflectionFileNamespace; |
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use ReflectionFunction; |
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/** |
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* Function proxy builder that is used to generate a proxy-function from the list of joinpoints |
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*/ |
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class FunctionProxy extends AbstractProxy |
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{ |
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/** |
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* List of advices for functions |
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* |
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* @var array |
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*/ |
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protected static $functionAdvices = []; |
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/** |
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* File namespace |
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* |
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* @var ReflectionFileNamespace |
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*/ |
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protected $namespace; |
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/** |
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* Source code for functions |
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* |
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* @var array Name of the function => source code for it |
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*/ |
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protected $functionsCode = []; |
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/** |
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* Constructs functions stub class from namespace Reflection |
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* |
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* @param ReflectionFileNamespace $namespace Reflection of namespace |
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* @param array $advices List of function advices |
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* |
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* @throws \InvalidArgumentException for invalid classes |
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*/ |
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public function __construct(ReflectionFileNamespace $namespace, array $advices = []) |
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{ |
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parent::__construct($advices); |
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$this->namespace = $namespace; |
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if (empty($advices[AspectContainer::FUNCTION_PREFIX])) { |
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return; |
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} |
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foreach ($advices[AspectContainer::FUNCTION_PREFIX] as $pointName => $value) { |
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$function = new ReflectionFunction($pointName); |
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$this->override($function, $this->getJoinpointInvocationBody($function)); |
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} |
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} |
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/** |
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* Returns a joinpoint for specific function in the namespace |
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* |
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* @param string $joinPointName Special joinpoint name |
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* @param string $namespace Name of the namespace |
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* |
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* @return FunctionInvocation |
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*/ |
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public static function getJoinPoint($joinPointName, $namespace) |
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{ |
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/** @var LazyAdvisorAccessor $accessor */ |
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static $accessor; |
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if (!$accessor) { |
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$accessor = AspectKernel::getInstance()->getContainer()->get('aspect.advisor.accessor'); |
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} |
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$advices = self::$functionAdvices[$namespace][AspectContainer::FUNCTION_PREFIX][$joinPointName]; |
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$filledAdvices = []; |
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foreach ($advices as $advisorName) { |
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$filledAdvices[] = $accessor->$advisorName; |
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} |
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return new ReflectionFunctionInvocation($joinPointName, $filledAdvices); |
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} |
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/** |
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* Inject advices for given trait |
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* |
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* NB This method will be used as a callback during source code evaluation to inject joinpoints |
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* |
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* @param string $namespace Aop child proxy class |
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* @param array|Advice[] $advices List of advices to inject into class |
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* |
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* @return void |
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*/ |
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public static function injectJoinPoints($namespace, array $advices = []) |
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{ |
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self::$functionAdvices[$namespace] = $advices; |
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} |
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/** |
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* Override function with new body |
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* |
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* @param ReflectionFunction $function Function reflection |
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* @param string $body New body for function |
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* |
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* @return $this |
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*/ |
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public function override(ReflectionFunction $function, $body) |
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{ |
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$this->functionsCode[$function->name] = $this->getOverriddenFunction($function, $body); |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function __toString() |
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{ |
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$functionsCode = ( |
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"<?php\n" . // Start of file header |
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$this->namespace->getDocComment() . "\n" . // Doc-comment for file |
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'namespace ' . // 'namespace' keyword |
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$this->namespace->getName() . // Name |
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";\n" . // End of namespace name |
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implode("\n", $this->functionsCode) // Function definitions |
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); |
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return $functionsCode |
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// Inject advices on call |
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. PHP_EOL |
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. '\\' . __CLASS__ . "::injectJoinPoints('" |
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. $this->namespace->getName() . "'," |
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. var_export($this->advices, true) . ');'; |
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} |
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/** |
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* Creates definition for trait method body |
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* |
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* @param ReflectionFunction $function Method reflection |
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* |
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* @return string new method body |
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*/ |
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protected function getJoinpointInvocationBody(ReflectionFunction $function) |
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{ |
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$class = '\\' . __CLASS__; |
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$args = $this->prepareArgsLine($function); |
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$return = 'return '; |
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if (PHP_VERSION_ID >= 70100 && $function->hasReturnType()) { |
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$returnType = (string) $function->getReturnType(); |
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if ($returnType === 'void') { |
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// void return types should not return anything |
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$return = ''; |
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} |
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} |
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return <<<BODY |
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static \$__joinPoint; |
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if (!\$__joinPoint) { |
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\$__joinPoint = {$class}::getJoinPoint('{$function->name}', __NAMESPACE__); |
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} |
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{$return}\$__joinPoint->__invoke($args); |
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BODY; |
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} |
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} |
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goaop /
framework
