--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony CMF package.
+ *
+ * (c) 2011-2015 Symfony CMF
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Cmf\Component\Routing\Enhancer;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+
+/**
+ * This enhancer sets the content to target field if the route provides content.
+ *
+ * Only works with RouteObjectInterface routes that can return a referenced
+ * content.
+ *
+ * @author David Buchmann
+ */
+class RouteContentEnhancer implements RouteEnhancerInterface
+{
+ /**
+ * @var string field for the route class
+ */
+ protected $routefield;
+ /**
+ * @var string field to write hashmap lookup result into
+ */
+ protected $target;
+
+ /**
+ * @param string $routefield the field name of the route class
+ * @param string $target the field name to set from the map
+ * @param array $hashmap the map of class names to field values
+ */
+ public function __construct($routefield, $target)
+ {
+ $this->routefield = $routefield;
+ $this->target = $target;
+ }
+
+ /**
+ * If the route has a non-null content and if that content class is in the
+ * injected map, returns that controller.
+ *
+ * {@inheritdoc}
+ */
+ public function enhance(array $defaults, Request $request)
+ {
+ if (isset($defaults[$this->target])) {
+ // no need to do anything
+ return $defaults;
+ }
+
+ if (!isset($defaults[$this->routefield])
+ || !$defaults[$this->routefield] instanceof RouteObjectInterface
+ ) {
+ // we can't determine the content
+ return $defaults;
+ }
+ /** @var $route RouteObjectInterface */
+ $route = $defaults[$this->routefield];
+
+ $content = $route->getContent();
+ if (!$content) {
+ // we have no content
+ return $defaults;
+ }
+ $defaults[$this->target] = $content;
+
+ return $defaults;
+ }
+}