--- /dev/null
+<?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\DependencyInjection\Loader\Configurator;
+
+use Symfony\Component\DependencyInjection\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\ExpressionLanguage\Expression;
+
+abstract class AbstractConfigurator
+{
+ const FACTORY = 'unknown';
+
+ /** @internal */
+ protected $definition;
+
+ public function __call($method, $args)
+ {
+ if (method_exists($this, 'set'.$method)) {
+ return call_user_func_array(array($this, 'set'.$method), $args);
+ }
+
+ throw new \BadMethodCallException(sprintf('Call to undefined method %s::%s()', get_class($this), $method));
+ }
+
+ /**
+ * Checks that a value is valid, optionally replacing Definition and Reference configurators by their configure value.
+ *
+ * @param mixed $value
+ * @param bool $allowServices whether Definition and Reference are allowed; by default, only scalars and arrays are
+ *
+ * @return mixed the value, optionally cast to a Definition/Reference
+ */
+ public static function processValue($value, $allowServices = false)
+ {
+ if (is_array($value)) {
+ foreach ($value as $k => $v) {
+ $value[$k] = static::processValue($v, $allowServices);
+ }
+
+ return $value;
+ }
+
+ if ($value instanceof ReferenceConfigurator) {
+ return new Reference($value->id, $value->invalidBehavior);
+ }
+
+ if ($value instanceof InlineServiceConfigurator) {
+ $def = $value->definition;
+ $value->definition = null;
+
+ return $def;
+ }
+
+ if ($value instanceof self) {
+ throw new InvalidArgumentException(sprintf('"%s()" can be used only at the root of service configuration files.', $value::FACTORY));
+ }
+
+ switch (true) {
+ case null === $value:
+ case is_scalar($value):
+ return $value;
+
+ case $value instanceof ArgumentInterface:
+ case $value instanceof Definition:
+ case $value instanceof Expression:
+ case $value instanceof Parameter:
+ case $value instanceof Reference:
+ if ($allowServices) {
+ return $value;
+ }
+ }
+
+ throw new InvalidArgumentException(sprintf('Cannot use values of type "%s" in service configuration files.', is_object($value) ? get_class($value) : gettype($value)));
+ }
+}