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<?php |
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namespace Gendoria\CommandQueue\RouteDetection\Detector; |
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use Gendoria\CommandQueue\RouteDetection\Detection\ClassDetection; |
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use Gendoria\CommandQueue\RouteDetection\Detection\DefaultDetection; |
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use Gendoria\CommandQueue\RouteDetection\Detection\DetectionInterface; |
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use InvalidArgumentException; |
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use ReflectionClass; |
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/** |
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* Detector class used for match class expressions with arbitrary routes. |
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* |
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* @author Tomasz Struczyński <[email protected]> |
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*/ |
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class RouteDetector |
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{ |
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/** |
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* Simple routes in a form of [Class] => [PoolName]. |
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* |
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* @var array |
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*/ |
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private $simpleRoutes = array(); |
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/** |
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* Expression routes in a form of [ClassExpression] => [PoolName]. |
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* |
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* @var array |
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*/ |
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private $regexpRoutes = array(); |
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/** |
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* Default route. |
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* |
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* @var string |
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*/ |
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private $defaultRoute = ''; |
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/** |
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* Class constructor. |
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*/ |
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public function __construct($defaultRoute = '') |
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{ |
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$this->setDefault($defaultRoute); |
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} |
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/** |
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* Add new route. |
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* |
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* @param string $expression Either simple expression, or RegExp describing route. |
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* @param string $route Route name. |
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* |
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* @return bool True, if route has been set, false otherwise. |
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*/ |
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public function addRoute($expression, $route) |
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{ |
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//Detect command expression |
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if (strpos($expression, '*') !== false) { |
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return $this->addRegexpRoute($expression, $route); |
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} else { |
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return $this->addSimpleRoute($expression, $route); |
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} |
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} |
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/** |
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* Add new regexp route. |
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* |
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* @param string $expression RegExp describing route. |
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* @param string $route Route name. |
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* |
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* @return bool True, if route has been set, false otherwise. |
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*/ |
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private function addRegexpRoute($expression, $route) |
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{ |
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$expression = '|^'.str_replace(array('*', '\\'), array('.*', '\\\\'), $expression).'$|i'; |
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if (array_key_exists($expression, $this->regexpRoutes) && $this->regexpRoutes[$expression] == $route) { |
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return false; |
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} |
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$this->regexpRoutes[$expression] = (string) $route; |
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return true; |
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} |
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/** |
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* Add new simple route. |
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* |
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* @param string $expression Simple route expression. |
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* @param string $route Route name. |
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* |
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* @return bool True, if route has been set, false otherwise. |
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*/ |
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private function addSimpleRoute($expression, $route) |
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{ |
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if (array_key_exists($expression, $this->simpleRoutes) && $this->simpleRoutes[$expression] == $route) { |
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return false; |
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} |
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$this->simpleRoutes[$expression] = (string) $route; |
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return true; |
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} |
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/** |
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* Set default route. |
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* |
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* @param string $route |
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*/ |
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public function setDefault($route) |
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{ |
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$this->defaultRoute = (string) $route; |
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} |
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/** |
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* Get default route. |
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* |
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* @return string |
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*/ |
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protected function getDefault() |
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{ |
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return $this->defaultRoute; |
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} |
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/** |
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* Detect correct route for given class. |
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* |
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* @param string $className |
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* |
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* @return string |
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* |
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* @throws InvalidArgumentException Thrown, if argument is not a class name. |
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*/ |
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public function detect($className) |
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{ |
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if (!class_exists($className)) { |
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throw new \InvalidArgumentexception('Given name is not a class'); |
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} |
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return $this->doDetect($className)->getPoolName(); |
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} |
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/** |
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* Detect pool. |
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* |
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* @param string $className |
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* @param boolean $performInterfaceDetection |
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* |
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* @return DetectionInterface |
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*/ |
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private function doDetect($className, $performInterfaceDetection = true) |
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{ |
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$detection = $this->doDetectByRoutes($className); |
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if ($detection) { |
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return $detection; |
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} |
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//Nothing is found so far. We will check all of the class interfaces and base classes. |
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//First - check base classes up to the 'root' |
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$classDetection = $this->doDetectByClassParents($className); |
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if ($classDetection) { |
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return $classDetection; |
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} |
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//Check the class interfaces |
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if ($performInterfaceDetection) { |
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$definition = $this->doDetectByInterfaces($className); |
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if ($definition) { |
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return $definition; |
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} |
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} |
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return new DefaultDetection($this->defaultRoute); |
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} |
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/** |
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* Preform detection by class parents. |
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* |
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* @param string $className |
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* @return ClassDetection|null |
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*/ |
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private function doDetectByClassParents($className) |
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{ |
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$parentClass = get_parent_class($className); |
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if ($parentClass) { |
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$parentDetection = $this->doDetect($parentClass, false); |
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if ($parentDetection instanceof ClassDetection) { |
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return $parentDetection; |
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} |
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} |
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} |
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/** |
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* Perform detection based on class name and routes registered for this class. |
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* |
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* @param string $className |
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* |
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* @return ClassDetection|null |
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*/ |
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private function doDetectByRoutes($className) |
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{ |
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//If we have entry for a command class, we should always return it, as it is most specific. |
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if (!empty($this->simpleRoutes[$className])) { |
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return new ClassDetection($this->simpleRoutes[$className]); |
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} |
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//Now, we should check, if we have 'regexp' entry for class |
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foreach ($this->regexpRoutes as $regexpRoute => $poolName) { |
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if (preg_match($regexpRoute, $className)) { |
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return new ClassDetection($poolName); |
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} |
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} |
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} |
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/** |
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* Perform detection based on class interfaces. |
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* |
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* @param string $className |
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* |
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* @return DetectionInterface|null |
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*/ |
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private function doDetectByInterfaces($className) |
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{ |
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$interfaces = $this->getOrderedInterfaces($className); |
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foreach ($interfaces as $interface) { |
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$candidate = $this->doDetectByRoutes($interface); |
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if ($candidate) { |
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return $candidate; |
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} |
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} |
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return; |
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} |
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/** |
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* Get a list of class interfaces ordered by plase of interface declaration. |
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* |
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* The list is ordered by place of interface declaration. Interfaces declared on most child class are first, |
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* while those in base class(es) - last. |
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* |
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* @param string $className |
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* |
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* @return array |
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*/ |
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private function getOrderedInterfaces($className) |
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{ |
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$interfacesArr = $this->prepareClassTreeInterfaces($className); |
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$interfaces = array(); |
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foreach ($interfacesArr as $classInterfaces) { |
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foreach ($classInterfaces as $interface) { |
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if (array_search($interface, $interfaces) === false) { |
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array_unshift($interfaces, $interface); |
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} |
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} |
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} |
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return $interfaces; |
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} |
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/** |
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* Prepares all interfaces for given class and its parents. |
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* |
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* @param string $className |
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* @return array |
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*/ |
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private function prepareClassTreeInterfaces($className) |
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{ |
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$interfacesArr = array(); |
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$reflection = new ReflectionClass($className); |
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$interfacesArr[] = $reflection->getInterfaceNames(); |
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if (empty($interfacesArr[0])) { |
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return array(); |
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} |
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$classParents = class_parents($className); |
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foreach ($classParents as $parentClass) { |
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$reflection = new ReflectionClass($parentClass); |
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$tmpInterfaces = $reflection->getInterfaceNames(); |
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if (empty($tmpInterfaces)) { |
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return $interfacesArr; |
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} |
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array_unshift($interfacesArr, $tmpInterfaces); |
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} |
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return $interfacesArr; |
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} |
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} |
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