diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/Config/Definition/BaseNode.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Config/Definition/BaseNode.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,259 @@
+<?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\Config\Definition;
+
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Exception\ForbiddenOverwriteException;
+use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
+use Symfony\Component\Config\Definition\Builder\NodeDefinition;
+
+/**
+ * The base node class
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+abstract class BaseNode implements NodeInterface
+{
+    protected $name;
+    protected $parent;
+    protected $normalizationClosures;
+    protected $finalValidationClosures;
+    protected $allowOverwrite;
+    protected $required;
+    protected $equivalentValues;
+
+    /**
+     * Constructor.
+     *
+     * @param string $name The name of the node
+     * @param NodeInterface $parent The parent of this node
+     * @throws \InvalidArgumentException if the name contains a period.
+     */
+    public function __construct($name, NodeInterface $parent = null)
+    {
+        if (false !== strpos($name, '.')) {
+            throw new \InvalidArgumentException('The name must not contain ".".');
+        }
+
+        $this->name = $name;
+        $this->parent = $parent;
+        $this->normalizationClosures = array();
+        $this->finalValidationClosures = array();
+        $this->allowOverwrite = true;
+        $this->required = false;
+        $this->equivalentValues = array();
+    }
+
+    /**
+     * Adds an equivalent value.
+     *
+     * @param mixed $originalValue
+     * @param mixed $equivalentValue
+     */
+    public function addEquivalentValue($originalValue, $equivalentValue)
+    {
+        $this->equivalentValues[] = array($originalValue, $equivalentValue);
+    }
+
+    /**
+     * Set this node as required.
+     *
+     * @param Boolean $boolean Required node
+     */
+    public function setRequired($boolean)
+    {
+        $this->required = (Boolean) $boolean;
+    }
+
+    /**
+     * Sets if this node can be overridden.
+     *
+     * @param Boolean $allow
+     */
+    public function setAllowOverwrite($allow)
+    {
+        $this->allowOverwrite = (Boolean) $allow;
+    }
+
+    /**
+     * Sets the closures used for normalization.
+     *
+     * @param array $closures An array of Closures used for normalization
+     */
+    public function setNormalizationClosures(array $closures)
+    {
+        $this->normalizationClosures = $closures;
+    }
+
+    /**
+     * Sets the closures used for final validation.
+     *
+     * @param array $closures An array of Closures used for final validation
+     */
+    public function setFinalValidationClosures(array $closures)
+    {
+        $this->finalValidationClosures = $closures;
+    }
+
+    /**
+     * Checks if this node is required.
+     *
+     * @return Boolean
+     */
+    public function isRequired()
+    {
+        return $this->required;
+    }
+
+    /**
+     * Returns the name of this node
+     *
+     * @return string The Node's name.
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Retrieves the path of this node.
+     *
+     * @return string The Node's path
+     */
+    public function getPath()
+    {
+        $path = $this->name;
+
+        if (null !== $this->parent) {
+            $path = $this->parent->getPath().'.'.$path;
+        }
+
+        return $path;
+    }
+
+    /**
+     * Merges two values together.
+     *
+     * @param mixed $leftSide
+     * @param mixed $rightSide
+     * @return mixed The merged value
+     * @throws ForbiddenOverwriteException
+     */
+    public final function merge($leftSide, $rightSide)
+    {
+        if (!$this->allowOverwrite) {
+            throw new ForbiddenOverwriteException(sprintf(
+                'Configuration path "%s" cannot be overwritten. You have to '
+               .'define all options for this path, and any of its sub-paths in '
+               .'one configuration section.',
+                $this->getPath()
+            ));
+        }
+
+        $this->validateType($leftSide);
+        $this->validateType($rightSide);
+
+        return $this->mergeValues($leftSide, $rightSide);
+    }
+
+    /**
+     * Normalizes a value, applying all normalization closures.
+     *
+     * @param mixed $value Value to normalize.
+     *
+     * @return mixed The normalized value.
+     */
+    public final function normalize($value)
+    {
+        // run custom normalization closures
+        foreach ($this->normalizationClosures as $closure) {
+            $value = $closure($value);
+        }
+
+        // replace value with their equivalent
+        foreach ($this->equivalentValues as $data) {
+            if ($data[0] === $value) {
+                $value = $data[1];
+            }
+        }
+
+        // validate type
+        $this->validateType($value);
+
+        // normalize value
+        return $this->normalizeValue($value);
+    }
+
+    /**
+     * Finalizes a value, applying all finalization closures.
+     *
+     * @param mixed $value The value to finalize
+     * @return mixed The finalized value
+     */
+    public final function finalize($value)
+    {
+        $this->validateType($value);
+
+        $value = $this->finalizeValue($value);
+
+        // Perform validation on the final value if a closure has been set.
+        // The closure is also allowed to return another value.
+        foreach ($this->finalValidationClosures as $closure) {
+            try {
+                $value = $closure($value);
+            } catch (Exception $correctEx) {
+                throw $correctEx;
+            } catch (\Exception $invalid) {
+                throw new InvalidConfigurationException(sprintf(
+                    'Invalid configuration for path "%s": %s',
+                    $this->getPath(),
+                    $invalid->getMessage()
+                ), $invalid->getCode(), $invalid);
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * Validates the type of a Node.
+     *
+     * @param mixed $value The value to validate
+     * @throws InvalidTypeException when the value is invalid
+     */
+    abstract protected function validateType($value);
+
+    /**
+     * Normalizes the value.
+     *
+     * @param mixed $value The value to normalize.
+     * @return mixed The normalized value
+     */
+    abstract protected function normalizeValue($value);
+
+    /**
+     * Merges two values together
+     *
+     * @param mixed $leftSide
+     * @param mixed $rightSide
+     * @return mixed The merged value
+     */
+    abstract protected function mergeValues($leftSide, $rightSide);
+
+    /**
+     * Finalizes a value
+     *
+     * @param mixed $value The value to finalize
+     * @return mixed The finalized value
+     */
+    abstract protected function finalizeValue($value);
+}