--- /dev/null
+<?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 MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Persistence\Mapping\Driver;
+
+use Doctrine\Common\Persistence\Mapping\ClassMetadata;
+
+/**
+ * Contract for metadata drivers.
+ *
+ * @since 2.2
+ * @author Jonathan H. Wage <jonwage@gmail.com>
+ */
+interface MappingDriver
+{
+ /**
+ * Loads the metadata for the specified class into the provided container.
+ *
+ * @param string $className
+ * @param ClassMetadata $metadata
+ *
+ * @return void
+ */
+ public function loadMetadataForClass($className, ClassMetadata $metadata);
+
+ /**
+ * 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();
+
+ /**
+ * Returns whether the class with the specified name should have its metadata loaded.
+ * This is only the case if it is either mapped as an Entity or a MappedSuperclass.
+ *
+ * @param string $className
+ *
+ * @return boolean
+ */
+ public function isTransient($className);
+}