[2.0] DDC-318 - Fix successive calls to AnnotationDriver::getAllClassNames()

lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php

@@ -63,6 +63,11 @@ class AnnotationDriver implements Driver
      */
     protected $_fileExtension = '.php';
 
+    /**
+     * @param array
+     */
+    protected $_classNames = null;
+    
     /**
      * Initializes a new AnnotationDriver that uses the given AnnotationReader for reading
      * docblock annotations.
@@ -407,6 +412,10 @@ class AnnotationDriver implements Driver
      */
     public function getAllClassNames()
     {
+        if ($this->_classNames !== null) {
+            return $this->_classNames;
+        }
+
         $classes = array();
     
         if ($this->_paths) {
@@ -440,6 +449,8 @@ class AnnotationDriver implements Driver
             }
         }
 
+        $this->_classNames = $classes;
+        
         return $classes;
     }