70 lines
1.9 KiB
PHP
70 lines
1.9 KiB
PHP
<?php
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/**
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* Use the SilverStripe configuration system to lookup config for a
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* particular service.
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*
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* @package framework
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* @subpackage injector
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*/
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class SilverStripeServiceConfigurationLocator extends ServiceConfigurationLocator {
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/**
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* List of Injector configurations cached from Config in class => config format.
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* If any config is false, this denotes that this class and all its parents
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* have no configuration specified.
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*
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* @var array
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*/
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protected $configs = array();
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public function locateConfigFor($name) {
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// Check direct or cached result
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$config = $this->configFor($name);
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if($config !== null) return $config;
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// do parent lookup if it's a class
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if (class_exists($name)) {
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$parents = array_reverse(array_keys(ClassInfo::ancestry($name)));
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array_shift($parents);
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foreach ($parents as $parent) {
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// have we already got for this?
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$config = $this->configFor($parent);
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if($config !== null) {
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// Cache this result
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$this->configs[$name] = $config;
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return $config;
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}
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}
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}
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// there is no parent config, so we'll record that as false so we don't do the expensive
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// lookup through parents again
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$this->configs[$name] = false;
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}
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/**
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* Retrieves the config for a named service without performing a hierarchy walk
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*
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* @param string $name Name of service
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* @return mixed Returns either the configuration data, if there is any. A missing config is denoted
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* by a value of either null (there is no direct config assigned and a hierarchy walk is necessary)
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* or false (there is no config for this class, nor within the hierarchy for this class).
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*/
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protected function configFor($name) {
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// Return cached result
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if (isset($this->configs[$name])) {
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return $this->configs[$name]; // Potentially false
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}
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$config = Config::inst()->get('Injector', $name);
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if ($config) {
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$this->configs[$name] = $config;
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return $config;
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} else {
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return null;
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}
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}
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} |