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<?php declare(strict_types=1); |
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/** |
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* Created by Vitaly Iegorov <[email protected]>. |
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* on 26.01.16 at 15:11 |
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*/ |
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namespace samsonframework\di; |
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use samsonframework\di\exception\ClassNotFoundException; |
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use samsonframework\di\exception\ContainerException; |
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/** |
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* Dependency container. |
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* |
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* @author Vitaly Iegorov <[email protected]> |
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*/ |
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class Container implements ContainerInterface |
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{ |
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/** @var array[string] Collection of loaded services */ |
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protected $services = []; |
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/** @var array[string] Collection of alias => class name for alias resolving */ |
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protected $aliases = []; |
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/** @var array[string] Collection of class name dependencies trees */ |
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protected $dependencies = []; |
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/** @var ContainerInterface[] Collection of delegated containers */ |
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protected $delegates = []; |
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/** @var callable Dependency resolving function callable */ |
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protected $logicCallable; |
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/** |
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* Wrapper for calling dependency resolving function. |
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* |
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* @param string $dependency Dependency name |
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* |
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* @return mixed Created instance or null |
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* @throws ContainerException |
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*/ |
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protected function logic($dependency) |
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{ |
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if (!is_callable($this->logicCallable)) { |
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throw new ContainerException('Logic function is not callable'); |
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} |
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return call_user_func($this->logicCallable, $dependency); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \samsonframework\di\exception\ContainerException |
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* @throws \samsonframework\di\exception\ClassNotFoundException |
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*/ |
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public function get($dependency) |
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{ |
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// Get pointer from logic |
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$module = $this->logic($dependency) ?? $this->getFromDelegate($dependency); |
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if (null === $module) { |
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throw new ClassNotFoundException($dependency); |
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} else { |
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return $module; |
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} |
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} |
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/** |
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* Try to find dependency in delegate container. |
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* |
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* @param string $dependency Dependency identifier |
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* |
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* @return mixed Delegate found dependency |
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* |
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* @throws \Interop\Container\Exception\ContainerException |
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*/ |
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protected function getFromDelegate(string $dependency) |
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{ |
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// Try delegate lookup |
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foreach ($this->delegates as $delegate) { |
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try { |
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return $delegate->get($dependency); |
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} catch (ContainerException $e) { |
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// Catch all delegated exceptions |
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} catch (ClassNotFoundException $e) { |
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// Catch all delegated exceptions |
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} |
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} |
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return null; |
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} |
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/** |
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* Implementing delegate lookup feature. |
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* If current container cannot resolve entity dependency |
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* resolving process is passed to delegated container. |
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* |
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* @param ContainerInterface $container Container for delegate lookup |
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*/ |
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public function delegate(ContainerInterface $container) |
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{ |
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$this->delegates[] = $container; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function has($dependency) : bool |
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{ |
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$found = array_key_exists($dependency, $this->dependencies) |
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|| in_array($dependency, $this->aliases, true); |
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// Return true if found or try delegate containers |
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return $found ?: $this->hasDelegate($dependency); |
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} |
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/** |
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* Define if delegate containers have dependency. |
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* |
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* @param string $dependency Dependency identifier |
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* |
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* @return bool True if delegate containers have dependency |
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*/ |
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protected function hasDelegate(string $dependency) : bool |
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{ |
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foreach ($this->delegates as $delegate) { |
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if ($delegate->has($dependency)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Set service dependency. Upon first creation of this class instance |
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* it would be used everywhere where this dependency is needed. |
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* |
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* @param string $className Fully qualified class name |
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* @param array $parameters Collection of parameters needed for dependency creation |
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* @param string $alias Dependency name |
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* |
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* @return ContainerInterface Chaining |
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*/ |
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8 |
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public function service($className, array $parameters = [], string $alias = null) : ContainerInterface |
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{ |
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$this->services[$className] = $className; |
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return $this->set($className, $parameters, $alias); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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8 |
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public function set($className, array $dependencies = [], string $alias = null) : ContainerInterface |
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{ |
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// Create dependencies collection for class name |
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if (!array_key_exists($className, $this->dependencies)) { |
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$this->dependencies[$className] = []; |
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} |
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// Merge other class constructor parameters |
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$this->dependencies[$className] = array_merge($this->dependencies[$className], $dependencies); |
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// Store alias for this class name |
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$this->aliases[$className] = $alias; |
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return $this; |
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} |
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} |
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samsonframework /
di
