diff -r 000000000000 -r 7f95f8617b0b vendor/doctrine/lib/Doctrine/ORM/Mapping/Driver/DriverChain.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/doctrine/lib/Doctrine/ORM/Mapping/Driver/DriverChain.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,126 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Mapping\Driver;
+
+use Doctrine\ORM\Mapping\Driver\Driver,
+    Doctrine\ORM\Mapping\ClassMetadataInfo,
+    Doctrine\ORM\Mapping\MappingException;
+
+/**
+ * The DriverChain allows you to add multiple other mapping drivers for
+ * certain namespaces
+ *
+ * @since 2.0
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author Jonathan H. Wage <jonwage@gmail.com>
+ * @author Roman Borschel <roman@code-factory.org>
+ * @todo Rename: MappingDriverChain or MetadataDriverChain
+ */
+class DriverChain implements Driver
+{
+    /**
+     * @var array
+     */
+    private $_drivers = array();
+
+    /**
+     * Add a nested driver.
+     *
+     * @param Driver $nestedDriver
+     * @param string $namespace
+     */
+    public function addDriver(Driver $nestedDriver, $namespace)
+    {
+        $this->_drivers[$namespace] = $nestedDriver;
+    }
+
+    /**
+     * Get the array of nested drivers.
+     *
+     * @return array $drivers
+     */
+    public function getDrivers()
+    {
+        return $this->_drivers;
+    }
+
+    /**
+     * Loads the metadata for the specified class into the provided container.
+     *
+     * @param string $className
+     * @param ClassMetadataInfo $metadata
+     */
+    public function loadMetadataForClass($className, ClassMetadataInfo $metadata)
+    {
+        foreach ($this->_drivers as $namespace => $driver) {
+            if (strpos($className, $namespace) === 0) {
+                $driver->loadMetadataForClass($className, $metadata);
+                return;
+            }
+        }
+
+        throw MappingException::classIsNotAValidEntityOrMappedSuperClass($className);
+    }
+
+    /**
+     * Gets the names of all mapped classes known to this driver.
+     *
+     * @return array The names of all mapped classes known to this driver.
+     */
+    public function getAllClassNames()
+    {
+        $classNames = array();
+        $driverClasses = array();
+        foreach ($this->_drivers AS $namespace => $driver) {
+            $oid = spl_object_hash($driver);
+            if (!isset($driverClasses[$oid])) {
+                $driverClasses[$oid] = $driver->getAllClassNames();
+            }
+            
+            foreach ($driverClasses[$oid] AS $className) {
+                if (strpos($className, $namespace) === 0) {
+                    $classNames[$className] = true;
+                }
+            }
+        }
+        return array_keys($classNames);
+    }
+
+    /**
+     * Whether the class with the specified name should have its metadata loaded.
+     *
+     * This is only the case for non-transient classes either mapped as an Entity or MappedSuperclass.
+     *
+     * @param string $className
+     * @return boolean
+     */
+    public function isTransient($className)
+    {
+        foreach ($this->_drivers AS $namespace => $driver) {
+            if (strpos($className, $namespace) === 0) {
+                return $driver->isTransient($className);
+            }
+        }
+
+        // class isTransient, i.e. not an entity or mapped superclass
+        return true;
+    }
+}
\ No newline at end of file