diff --git a/lib/Doctrine/ORM/Mapping/Builder/ClassMetadataBuilder.php b/lib/Doctrine/ORM/Mapping/Builder/ClassMetadataBuilder.php
new file mode 100644
index 000000000..b2a97e7f8
--- /dev/null
+++ b/lib/Doctrine/ORM/Mapping/Builder/ClassMetadataBuilder.php
@@ -0,0 +1,79 @@
+<?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\Builder;
+
+use Doctrine\ORM\Mapping\ClassMetadata;
+
+/**
+ * Builder Object for ClassMetadata
+ *
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @link        www.doctrine-project.com
+ * @since       2.0
+ * @author      Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class ClassMetadataBuilder
+{
+    /**
+     * @var ClassMetadata
+     */
+    private $cm;
+
+    public function __construct(ClassMetadata $cm)
+    {
+        $this->cm = $cm;
+    }
+
+    public function setMappedSuperClass()
+    {
+        $this->cm->isMappedSuperclass = true;
+    }
+
+    public function setCustomRepositoryClass($repositoryClassName)
+    {
+        $this->cm->setCustomRepositoryClass($repositoryClassName);
+    }
+
+    public function setReadOnly()
+    {
+        $this->cm->markReadOnly();
+    }
+
+    public function setTable($name)
+    {
+        $this->cm->setPrimaryTable(array('name' => $name));
+    }
+
+    public function addIndex(array $columns, $name)
+    {
+        if (!isset($this->cm->table['indexes'])) {
+            $this->cm->table['indexes'] = array();
+        }
+        $this->cm->table['indexes'][$name] = array('columns' => $columns);
+    }
+
+    public function addUniqueConstraint(array $columns, $name)
+    {
+        if (!isset($this->cm->table['uniqueConstraints'])) {
+            $this->cm->table['uniqueConstraints'] = array();
+        }
+        $this->cm->table['uniqueConstraints'][$name] = array('columns' => $columns);
+    }
+}
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataBuilderTest.php b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataBuilderTest.php
new file mode 100644
index 000000000..551f3bb78
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Mapping/ClassMetadataBuilderTest.php
@@ -0,0 +1,99 @@
+<?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\Tests\ORM\Mapping;
+
+use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\Mapping\Builder\ClassMetadataBuilder;
+
+/**
+ * @group DDC-659
+ */
+class ClassMetadataBuilderTest extends \Doctrine\Tests\OrmTestCase
+{
+    /**
+     * @var ClassMetadata
+     */
+    private $cm;
+    /**
+     * @var ClassMetadataBuilder
+     */
+    private $builder;
+
+    public function setUp()
+    {
+        $this->cm = new ClassMetadata('Doctrine\Tests\Models\CMS\CmsUser');
+        $this->builder = new ClassMetadataBuilder($this->cm);
+    }
+
+    public function testSetMappedSuperClass()
+    {
+        $this->builder->setMappedSuperClass();
+
+        $this->assertTrue($this->cm->isMappedSuperclass);
+    }
+
+    public function testSetCustomRepositoryClass()
+    {
+        $this->builder->setCustomRepositoryClass('Doctrine\Tests\Models\CMS\CmsGroup');
+
+        $this->assertEquals('Doctrine\Tests\Models\CMS\CmsGroup', $this->cm->customRepositoryClassName);
+    }
+
+    public function testSetReadOnly()
+    {
+        $this->builder->setReadOnly();
+        $this->assertTrue($this->cm->isReadOnly);
+    }
+
+    public function testSetTable()
+    {
+        $this->builder->setTable('users');
+        $this->assertEquals('users', $this->cm->table['name']);
+    }
+
+    public function testAddIndex()
+    {
+        $this->builder->addIndex(array('username', 'name'), 'users_idx');
+        $this->assertEquals(array('users_idx' => array('columns' => array('username', 'name'))), $this->cm->table['indexes']);
+    }
+
+    public function testAddUniqueConstraint()
+    {
+        $this->builder->addUniqueConstraint(array('username', 'name'), 'users_idx');
+        $this->assertEquals(array('users_idx' => array('columns' => array('username', 'name'))), $this->cm->table['uniqueConstraints']);
+    }
+
+    public function testSetPrimaryTableRelated()
+    {
+        $this->builder->addUniqueConstraint(array('username', 'name'), 'users_idx');
+        $this->builder->addIndex(array('username', 'name'), 'users_idx');
+        $this->builder->setTable('users');
+
+        $this->assertEquals(
+            array(
+                'name' => 'users',
+                'indexes' => array('users_idx' => array('columns' => array('username', 'name'))),
+                'uniqueConstraints' => array('users_idx' => array('columns' => array('username', 'name'))),
+            ),
+            $this->cm->table
+        );
+    }
+}
\ No newline at end of file