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web/vendor/symfony-cmf/routing/Enhancer/FieldByClassEnhancer.php

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+<?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;
+
+/**
+ * This enhancer sets a field if not yet existing from the class of an object
+ * in another field.
+ *
+ * The comparison is done with instanceof to support proxy classes and such.
+ *
+ * Only works with RouteObjectInterface routes that can return a referenced
+ * content.
+ *
+ * @author David Buchmann
+ */
+class FieldByClassEnhancer implements RouteEnhancerInterface
+{
+    /**
+     * @var string field for the source class
+     */
+    protected $source;
+    /**
+     * @var string field to write hashmap lookup result into
+     */
+    protected $target;
+    /**
+     * @var array containing the mapping between a class name and the target value
+     */
+    protected $map;
+
+    /**
+     * @param string $source the field name of the class
+     * @param string $target the field name to set from the map
+     * @param array  $map    the map of class names to field values
+     */
+    public function __construct($source, $target, $map)
+    {
+        $this->source = $source;
+        $this->target = $target;
+        $this->map = $map;
+    }
+
+    /**
+     * If the source field is instance of one of the entries in the map,
+     * target is set to the value of that map entry.
+     *
+     * {@inheritdoc}
+     */
+    public function enhance(array $defaults, Request $request)
+    {
+        if (isset($defaults[$this->target])) {
+            // no need to do anything
+            return $defaults;
+        }
+
+        if (!isset($defaults[$this->source])) {
+            return $defaults;
+        }
+
+        // we need to loop over the array and do instanceof in case the content
+        // class extends the specified class
+        // i.e. phpcr-odm generates proxy class for the content.
+        foreach ($this->map as $class => $value) {
+            if ($defaults[$this->source] instanceof $class) {
+                // found a matching entry in the map
+                $defaults[$this->target] = $value;
+
+                return $defaults;
+            }
+        }
+
+        return $defaults;
+    }
+}