<?php
/*
* 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.
*/
namespace Symfony\Component\HttpKernel\DependencyInjection;
use Symfony\Component\Config\Definition\Processor;
use Symfony\Component\Config\Definition\ConfigurationInterface;
use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
use Symfony\Component\DependencyInjection\Extension\ConfigurationExtensionInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Container;
/**
* Provides useful features shared by many extensions.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface {
private $classes = array();
/**
* Gets the classes to cache.
*
* @return array An array of classes
*/
public function getClassesToCompile() {
return $this->classes;
}
/**
* Adds classes to the class cache.
*
* @param array $classes An array of classes
*/
public function addClassesToCompile(array $classes) {
$this->classes = array_merge($this->classes, $classes);
}
/**
* Returns the base path for the XSD files.
*
* @return string The XSD base path
*/
public function getXsdValidationBasePath() {
return false;
}
/**
* 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();
}
/**
* 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
*/
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);
return Container::underscore($classBaseName);
}
protected final function processConfiguration(ConfigurationInterface $configuration, array $configs) {
$processor = new Processor();
return $processor
->processConfiguration($configuration, $configs);
}
/**
* {@inheritDoc}
*/
public function getConfiguration(array $config, ContainerBuilder $container) {
$reflected = new \ReflectionClass($this);
$namespace = $reflected
->getNamespaceName();
$class = $namespace . '\\Configuration';
if (class_exists($class)) {
if (!method_exists($class, '__construct')) {
$configuration = new $class();
return $configuration;
}
}
return null;
}
}