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src/Symfony/Component/DependencyInjection/Extension/Extension.php
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<?php | ||
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/* | ||
* This file is part of the Symfony package. | ||
* | ||
* (c) Fabien Potencier <fabien@symfony.com> | ||
* | ||
* For the full copyright and license information, please view the LICENSE | ||
* file that was distributed with this source code. | ||
*/ | ||
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namespace Symfony\Component\DependencyInjection\Extension; | ||
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use Symfony\Component\DependencyInjection\Container; | ||
use Symfony\Component\Config\Resource\FileResource; | ||
use Symfony\Component\DependencyInjection\ContainerBuilder; | ||
use Symfony\Component\Config\Definition\Processor; | ||
use Symfony\Component\Config\Definition\ConfigurationInterface; | ||
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/** | ||
* Provides useful features shared by many extensions. | ||
* | ||
* @author Fabien Potencier <fabien@symfony.com> | ||
*/ | ||
abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface | ||
{ | ||
/** | ||
* Returns the base path for the XSD files. | ||
* | ||
* @return string The XSD base path | ||
*/ | ||
public function getXsdValidationBasePath() | ||
{ | ||
return false; | ||
} | ||
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/** | ||
* Returns the namespace to be used for this extension (XML namespace). | ||
* | ||
* @return string The XML namespace | ||
*/ | ||
public function getNamespace() | ||
{ | ||
return 'http://example.org/schema/dic/'.$this->getAlias(); | ||
} | ||
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/** | ||
* Returns the recommended alias to use in XML. | ||
* | ||
* This alias is also the mandatory prefix to use when using YAML. | ||
* | ||
* This convention is to remove the "Extension" postfix from the class | ||
* name and then lowercase and underscore the result. So: | ||
* | ||
* AcmeHelloExtension | ||
* | ||
* becomes | ||
* | ||
* acme_hello | ||
* | ||
* This can be overridden in a sub-class to specify the alias manually. | ||
* | ||
* @return string The alias | ||
* | ||
* @throws \BadMethodCallException When the extension name does not follow conventions | ||
*/ | ||
public function getAlias() | ||
{ | ||
$className = get_class($this); | ||
if (substr($className, -9) != 'Extension') { | ||
throw new \BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.'); | ||
} | ||
$classBaseName = substr(strrchr($className, '\\'), 1, -9); | ||
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return Container::underscore($classBaseName); | ||
} | ||
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final protected function processConfiguration(ConfigurationInterface $configuration, array $configs) | ||
{ | ||
$processor = new Processor(); | ||
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return $processor->processConfiguration($configuration, $configs); | ||
} | ||
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/** | ||
* {@inheritDoc} | ||
*/ | ||
public function getConfiguration(array $config, ContainerBuilder $container) | ||
{ | ||
$reflected = new \ReflectionClass($this); | ||
$namespace = $reflected->getNamespaceName(); | ||
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$class = $namespace . '\\Configuration'; | ||
if (class_exists($class)) { | ||
$r = new \ReflectionClass($class); | ||
$container->addResource(new FileResource($r->getFileName())); | ||
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if (!method_exists($class, '__construct')) { | ||
$configuration = new $class(); | ||
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return $configuration; | ||
} | ||
} | ||
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return null; | ||
} | ||
} |
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