PathAliasDeprecatedTestServiceProvider.php

<?php

namespace Drupal\path_alias_deprecated_test;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInjection\ServiceModifierInterface;

/**
 * Test service provider to test path alias deprecated services BC logic.
 */
class PathAliasDeprecatedTestServiceProvider implements ServiceModifierInterface {
    
    /**
     * The name of the new implementation class for the alias manager.
     *
     * @var string
     */
    public static $newClass;
    
    /**
     * Whether to use a decorator to wrap the alias manager implementation.
     *
     * @var bool
     */
    public static $useDecorator = FALSE;
    
    /**
     * {@inheritdoc}
     */
    public function alter(ContainerBuilder $container) {
        if (isset(static::$newClass)) {
            $definition = $container->getDefinition('path.alias_manager');
            $definition->setClass(static::$newClass);
        }
        if (!static::$useDecorator) {
            $decorator_id = 'path_alias_deprecated_test.path.alias_manager';
            if ($container->hasDefinition($decorator_id)) {
                $container->removeDefinition($decorator_id);
            }
        }
    }

}