diff -r 000000000000 -r 7f95f8617b0b vendor/doctrine/lib/Doctrine/ORM/Id/TableGenerator.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/doctrine/lib/Doctrine/ORM/Id/TableGenerator.php	Sat Sep 24 15:40:41 2011 +0200
@@ -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\Id;
+
+use Doctrine\ORM\EntityManager;
+
+/**
+ * Id generator that uses a single-row database table and a hi/lo algorithm.
+ *
+ * @since   2.0
+ * @author  Benjamin Eberlei <kontakt@beberlei.de>
+ * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author  Jonathan Wage <jonwage@gmail.com>
+ * @author  Roman Borschel <roman@code-factory.org>
+ */
+class TableGenerator extends AbstractIdGenerator
+{
+    private $_tableName;
+    private $_sequenceName;
+    private $_allocationSize;
+    private $_nextValue;
+    private $_maxValue;
+
+    public function __construct($tableName, $sequenceName = 'default', $allocationSize = 10)
+    {
+        $this->_tableName = $tableName;
+        $this->_sequenceName = $sequenceName;
+        $this->_allocationSize = $allocationSize;
+    }
+
+    public function generate(EntityManager $em, $entity)
+    {
+        if ($this->_maxValue === null || $this->_nextValue == $this->_maxValue) {
+            // Allocate new values
+            $conn = $em->getConnection();
+            if ($conn->getTransactionNestingLevel() == 0) {
+
+                // use select for update
+                $sql = $conn->getDatabasePlatform()->getTableHiLoCurrentValSql($this->_tableName, $this->_sequenceName);
+                $currentLevel = $conn->fetchColumn($sql);
+                if ($currentLevel != null) {
+                    $this->_nextValue = $currentLevel;
+                    $this->_maxValue = $this->_nextValue + $this->_allocationSize;
+
+                    $updateSql = $conn->getDatabasePlatform()->getTableHiLoUpdateNextValSql(
+                        $this->_tableName, $this->_sequenceName, $this->_allocationSize
+                    );
+                    
+                    if ($conn->executeUpdate($updateSql, array(1 => $currentLevel, 2 => $currentLevel+1)) !== 1) {
+                        // no affected rows, concurrency issue, throw exception
+                    }
+                } else {
+                    // no current level returned, TableGenerator seems to be broken, throw exception
+                }
+            } else {
+                // only table locks help here, implement this or throw exception?
+                // or do we want to work with table locks exclusively?
+            }
+        }
+        return $this->_nextValue++;
+    }
+}
\ No newline at end of file