96 lines
2.0 KiB
PHP
96 lines
2.0 KiB
PHP
<?php
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namespace SilverStripe\Core\Config;
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use BadMethodCallException;
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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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* @internal
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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 $manifests = array();
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/**
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* @return self
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*/
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public static function inst()
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{
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return self::$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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if (empty($this->manifests)) {
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throw new BadMethodCallException("No config manifests available");
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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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