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<?php |
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/** |
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* Bright Nucleus Config Component. |
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* |
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* @package BrightNucleus\Config |
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* @author Alain Schlesser <[email protected]> |
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* @license MIT |
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* @link http://www.brightnucleus.com/ |
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* @copyright 2016-2017 Alain Schlesser, Bright Nucleus |
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*/ |
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namespace BrightNucleus\Config\Loader; |
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use BrightNucleus\Config\Exception\FailedToLoadConfigException; |
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use Exception; |
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/** |
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* Class LoaderFactory. |
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* |
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* @since 0.4.0 |
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* |
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* @package BrightNucleus\Config\Loader |
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* @author Alain Schlesser <[email protected]> |
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*/ |
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class LoaderFactory |
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{ |
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/** |
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* Array of fully qualified class names of known loaders. |
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* |
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* @var array<string> |
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* |
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* @since 0.4.0 |
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*/ |
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protected static $loaders = [ |
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'BrightNucleus\Config\Loader\PHPLoader', |
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'BrightNucleus\Config\Loader\JSONLoader', |
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]; |
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/** |
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* Array of instantiated loaders. |
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* |
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* These are lazily instantiated and added as needed. |
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* |
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* @var LoaderInterface[] |
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* |
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* @since 0.4.0 |
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*/ |
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protected static $loaderInstances = []; |
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/** |
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* Create a new Loader from an URI. |
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* |
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* @since 0.4.0 |
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* |
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* @param string $uri URI of the resource to create a loader for. |
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* |
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* @return LoaderInterface Loader that is able to load the given URI. |
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* @throws FailedToLoadConfigException If no suitable loader was found. |
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*/ |
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public static function createFromUri($uri) |
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{ |
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foreach (static::$loaders as $loader) { |
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if ($loader::canLoad($uri)) { |
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return static::getLoader($loader); |
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} |
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} |
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throw new FailedToLoadConfigException( |
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sprintf( |
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_('Could not find a suitable loader for URI "%1$s".'), |
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$uri |
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) |
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); |
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} |
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/** |
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* Get an instance of a specific loader. |
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* |
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* The loader is lazily instantiated if needed. |
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* |
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* @since 0.4.0 |
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* |
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* @param string $loaderClass Fully qualified class name of the loader to get. |
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* |
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* @return LoaderInterface Instance of the requested loader. |
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* @throws FailedToLoadConfigException If the loader class could not be instantiated. |
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*/ |
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public static function getLoader($loaderClass) |
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{ |
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try { |
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if (! array_key_exists($loaderClass, static::$loaderInstances)) { |
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static::$loaderInstances[$loaderClass] = new $loaderClass; |
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} |
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return static::$loaderInstances[$loaderClass]; |
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} catch (Exception $exception) { |
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throw new FailedToLoadConfigException( |
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sprintf( |
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_('Could not instantiate the requested loader class "%1$s".'), |
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$loaderClass |
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) |
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); |
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} |
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} |
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/** |
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* Register a new loader. |
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* |
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* @since 0.4.0 |
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* |
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* @param string $loader Fully qualified class name of a loader implementing LoaderInterface. |
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*/ |
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public static function registerLoader($loader) |
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{ |
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if (in_array($loader, static::$loaders, true)) { |
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return; |
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} |
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static::$loaders [] = $loader; |
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} |
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} |
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brightnucleus /
config
