diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,237 @@
+<?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\ParameterBag;
+
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class ParameterBag implements ParameterBagInterface
+{
+    protected $parameters;
+    protected $resolved;
+
+    /**
+     * Constructor.
+     *
+     * @param array $parameters An array of parameters
+     *
+     * @api
+     */
+    public function __construct(array $parameters = array())
+    {
+        $this->parameters = array();
+        $this->add($parameters);
+        $this->resolved = false;
+    }
+
+    /**
+     * Clears all parameters.
+     *
+     * @api
+     */
+    public function clear()
+    {
+        $this->parameters = array();
+    }
+
+    /**
+     * Adds parameters to the service container parameters.
+     *
+     * @param array $parameters An array of parameters
+     *
+     * @api
+     */
+    public function add(array $parameters)
+    {
+        foreach ($parameters as $key => $value) {
+            $this->parameters[strtolower($key)] = $value;
+        }
+    }
+
+    /**
+     * Gets the service container parameters.
+     *
+     * @return array An array of parameters
+     *
+     * @api
+     */
+    public function all()
+    {
+        return $this->parameters;
+    }
+
+    /**
+     * Gets a service container parameter.
+     *
+     * @param string $name The parameter name
+     *
+     * @return mixed  The parameter value
+     *
+     * @throws  ParameterNotFoundException if the parameter is not defined
+     *
+     * @api
+     */
+    public function get($name)
+    {
+        $name = strtolower($name);
+
+        if (!array_key_exists($name, $this->parameters)) {
+            throw new ParameterNotFoundException($name);
+        }
+
+        return $this->parameters[$name];
+    }
+
+    /**
+     * Sets a service container parameter.
+     *
+     * @param string $name  The parameter name
+     * @param mixed  $value The parameter value
+     *
+     * @api
+     */
+    public function set($name, $value)
+    {
+        $this->parameters[strtolower($name)] = $value;
+    }
+
+    /**
+     * Returns true if a parameter name is defined.
+     *
+     * @param  string  $name       The parameter name
+     *
+     * @return Boolean true if the parameter name is defined, false otherwise
+     *
+     * @api
+     */
+    public function has($name)
+    {
+        return array_key_exists(strtolower($name), $this->parameters);
+    }
+
+    /**
+     * Replaces parameter placeholders (%name%) by their values for all parameters.
+     */
+    public function resolve()
+    {
+        if ($this->resolved) {
+            return;
+        }
+
+        $parameters = array();
+        foreach ($this->parameters as $key => $value) {
+            try {
+                $value = $this->resolveValue($value);
+                $parameters[$key] = is_string($value) ? str_replace('%%', '%', $value) : $value;
+            } catch (ParameterNotFoundException $e) {
+                $e->setSourceKey($key);
+
+                throw $e;
+            }
+        }
+
+        $this->parameters = $parameters;
+        $this->resolved = true;
+    }
+
+    /**
+     * Replaces parameter placeholders (%name%) by their values.
+     *
+     * @param mixed $value A value
+     * @param array $resolving An array of keys that are being resolved (used internally to detect circular references)
+     *
+     * @return mixed The resolved value
+     *
+     * @throws ParameterNotFoundException if a placeholder references a parameter that does not exist
+     * @throws ParameterCircularReferenceException if a circular reference if detected
+     * @throws RuntimeException when a given parameter has a type problem.
+     */
+    public function resolveValue($value, array $resolving = array())
+    {
+        if (is_array($value)) {
+            $args = array();
+            foreach ($value as $k => $v) {
+                $args[$this->resolveValue($k, $resolving)] = $this->resolveValue($v, $resolving);
+            }
+
+            return $args;
+        }
+
+        if (!is_string($value)) {
+            return $value;
+        }
+
+        return $this->resolveString($value, $resolving);
+    }
+
+    /**
+     * Resolves parameters inside a string
+     *
+     * @param string $value     The string to resolve
+     * @param array  $resolving An array of keys that are being resolved (used internally to detect circular references)
+     *
+     * @return string The resolved string
+     *
+     * @throws ParameterNotFoundException if a placeholder references a parameter that does not exist
+     * @throws ParameterCircularReferenceException if a circular reference if detected
+     * @throws RuntimeException when a given parameter has a type problem.
+     */
+    public function resolveString($value, array $resolving = array())
+    {
+        // we do this to deal with non string values (Boolean, integer, ...)
+        // as the preg_replace_callback throw an exception when trying
+        // a non-string in a parameter value
+        if (preg_match('/^%([^%]+)%$/', $value, $match)) {
+            $key = strtolower($match[1]);
+
+            if (isset($resolving[$key])) {
+                throw new ParameterCircularReferenceException(array_keys($resolving));
+            }
+
+            $resolving[$key] = true;
+
+            return $this->resolved ? $this->get($key) : $this->resolveValue($this->get($key), $resolving);
+        }
+
+        $self = $this;
+
+        return preg_replace_callback('/(?<!%)%([^%]+)%/', function ($match) use ($self, $resolving, $value) {
+            $key = strtolower($match[1]);
+            if (isset($resolving[$key])) {
+                throw new ParameterCircularReferenceException(array_keys($resolving));
+            }
+
+            $resolved = $self->get($key);
+
+            if (!is_string($resolved) && !is_numeric($resolved)) {
+                throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "%s" of type %s inside string value "%s".', $key, gettype($resolved), $value));
+            }
+
+            $resolved = (string) $resolved;
+            $resolving[$key] = true;
+
+            return $self->isResolved() ? $resolved : $self->resolveString($resolved, $resolving);
+        }, $value);
+    }
+
+    public function isResolved()
+    {
+        return $this->resolved;
+    }
+}