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<?php |
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namespace SilverStripe\Core\Config; |
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use SilverStripe\Config\Collections\ConfigCollectionInterface; |
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/** |
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* Registers config sources via ConfigCollectionInterface |
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*/ |
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class ConfigLoader |
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{ |
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/** |
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* @var self |
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*/ |
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private static $instance; |
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/** |
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* @var ConfigCollectionInterface[] map of config collections |
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*/ |
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protected $manifests = array(); |
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/** |
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* @return self |
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*/ |
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public static function instance() |
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{ |
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return self::$instance ? self::$instance : self::$instance = new self(); |
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} |
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/** |
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* Returns the currently active class manifest instance that is used for |
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* loading classes. |
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* |
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* @return ConfigCollectionInterface |
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*/ |
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public function getManifest() |
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{ |
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return $this->manifests[count($this->manifests) - 1]; |
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} |
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/** |
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* Returns true if this class loader has a manifest. |
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* |
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* @return bool |
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*/ |
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public function hasManifest() |
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{ |
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return (bool)$this->manifests; |
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} |
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/** |
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* Pushes a class manifest instance onto the top of the stack. |
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* |
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* @param ConfigCollectionInterface $manifest |
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*/ |
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public function pushManifest(ConfigCollectionInterface $manifest) |
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{ |
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$this->manifests[] = $manifest; |
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} |
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/** |
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* @return ConfigCollectionInterface |
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*/ |
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public function popManifest() |
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{ |
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return array_pop($this->manifests); |
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} |
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/** |
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* Check number of manifests |
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* |
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* @return int |
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*/ |
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public function countManifests() |
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{ |
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return count($this->manifests); |
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} |
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/** |
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* Nest the current manifest |
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* |
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* @return ConfigCollectionInterface |
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*/ |
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public function nest() |
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{ |
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$manifest = $this->getManifest()->nest(); |
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$this->pushManifest($manifest); |
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return $manifest; |
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} |
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} |
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silverstripe /
silverstripe-framework
