silverstripe-framework/src/Core/Config/ConfigLoader.php

91 lines
1.8 KiB
PHP

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