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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Di |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Di\Util; |
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/** |
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* ClassmapTrait |
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* |
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* Store resolved/created objects in a classmap for later access or reference |
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* |
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* @package Phoole\Di |
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*/ |
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trait ClassmapTrait |
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{ |
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/** |
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* service objects stored by its classname |
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* |
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* @var object[] |
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*/ |
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protected $classMap = []; |
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/** |
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* has service created by its classname/interface name already? |
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* returns the matching classname or NULL |
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* |
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* @param string $className |
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* @return string|NULL |
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*/ |
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protected function hasClass(string $className): ?string |
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{ |
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// not a classname |
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if (!\class_exists($className) && !\interface_exists($className)) { |
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return NULL; |
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} |
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// exact match found |
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if (isset($this->classMap[$className])) { |
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return $className; |
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} |
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// find subclass |
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return $this->findSubClass($className); |
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} |
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/** |
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* Find in map a subclass of $className if any |
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* |
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* @param string $className |
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* @return string|null |
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*/ |
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protected function findSubClass(string $className): ?string |
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{ |
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$classes = array_keys($this->classMap); |
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foreach ($classes as $class) { |
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if (is_a($class, $className, TRUE)) { |
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return $class; |
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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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* Retrieve object from classmap if match found |
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* |
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* @param string $className |
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* @return object|null |
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*/ |
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protected function matchClass(string $className): ?object |
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{ |
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if ($class = $this->hasClass($className)) { |
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return $this->classMap[$class]; |
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} |
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return NULL; |
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} |
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/** |
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* Store object in classmap |
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* |
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* @param object $object |
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*/ |
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protected function storeClass(object $object): void |
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{ |
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$this->classMap[get_class($object)] = $object; |
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} |
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} |
phoole /
di
