--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/doctrine-dbal/lib/Doctrine/DBAL/Schema/SchemaDiff.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,176 @@
+<?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\DBAL\Schema;
+
+use \Doctrine\DBAL\Platforms\AbstractPlatform;
+
+/**
+ * Schema Diff
+ *
+ * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @link    www.doctrine-project.org
+ * @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
+ * @license http://ez.no/licenses/new_bsd New BSD License
+ * @since   2.0
+ * @version $Revision$
+ * @author  Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class SchemaDiff
+{
+    /**
+     * All added tables
+     *
+     * @var array(string=>ezcDbSchemaTable)
+     */
+    public $newTables = array();
+
+    /**
+     * All changed tables
+     *
+     * @var array(string=>ezcDbSchemaTableDiff)
+     */
+    public $changedTables = array();
+
+    /**
+     * All removed tables
+     *
+     * @var array(string=>Table)
+     */
+    public $removedTables = array();
+
+    /**
+     * @var array
+     */
+    public $newSequences = array();
+
+    /**
+     * @var array
+     */
+    public $changedSequences = array();
+
+    /**
+     * @var array
+     */
+    public $removedSequences = array();
+
+    /**
+     * @var array
+     */
+    public $orphanedForeignKeys = array();
+
+    /**
+     * Constructs an SchemaDiff object.
+     *
+     * @param array(string=>Table)      $newTables
+     * @param array(string=>TableDiff)  $changedTables
+     * @param array(string=>bool)       $removedTables
+     */
+    public function __construct($newTables = array(), $changedTables = array(), $removedTables = array())
+    {
+        $this->newTables = $newTables;
+        $this->changedTables = $changedTables;
+        $this->removedTables = $removedTables;
+    }
+
+    /**
+     * The to save sql mode ensures that the following things don't happen:
+     *
+     * 1. Tables are deleted
+     * 2. Sequences are deleted
+     * 3. Foreign Keys which reference tables that would otherwise be deleted.
+     *
+     * This way it is ensured that assets are deleted which might not be relevant to the metadata schema at all.
+     *
+     * @param AbstractPlatform $platform
+     * @return array
+     */
+    public function toSaveSql(AbstractPlatform $platform)
+    {
+        return $this->_toSql($platform, true);
+    }
+
+    /**
+     * @param AbstractPlatform $platform
+     * @return array
+     */
+    public function toSql(AbstractPlatform $platform)
+    {
+        return $this->_toSql($platform, false);
+    }
+
+    /**
+     * @param AbstractPlatform $platform
+     * @param bool $saveMode
+     * @return array
+     */
+    protected function _toSql(AbstractPlatform $platform, $saveMode = false)
+    {
+        $sql = array();
+
+        if ($platform->supportsForeignKeyConstraints() && $saveMode == false) {
+            foreach ($this->orphanedForeignKeys AS $orphanedForeignKey) {
+                $sql[] = $platform->getDropForeignKeySQL($orphanedForeignKey, $orphanedForeignKey->getLocalTableName());
+            }
+        }
+
+        if ($platform->supportsSequences() == true) {
+            foreach ($this->changedSequences AS $sequence) {
+                $sql[] = $platform->getAlterSequenceSQL($sequence);
+            }
+
+            if ($saveMode === false) {
+                foreach ($this->removedSequences AS $sequence) {
+                    $sql[] = $platform->getDropSequenceSQL($sequence);
+                }
+            }
+
+            foreach ($this->newSequences AS $sequence) {
+                $sql[] = $platform->getCreateSequenceSQL($sequence);
+            }
+        }
+
+        $foreignKeySql = array();
+        foreach ($this->newTables AS $table) {
+            $sql = array_merge(
+                $sql,
+                $platform->getCreateTableSQL($table, AbstractPlatform::CREATE_INDEXES)
+            );
+
+            if ($platform->supportsForeignKeyConstraints()) {
+                foreach ($table->getForeignKeys() AS $foreignKey) {
+                    $foreignKeySql[] = $platform->getCreateForeignKeySQL($foreignKey, $table);
+                }
+            }
+        }
+        $sql = array_merge($sql, $foreignKeySql);
+
+        if ($saveMode === false) {
+            foreach ($this->removedTables AS $table) {
+                $sql[] = $platform->getDropTableSQL($table);
+            }
+        }
+
+        foreach ($this->changedTables AS $tableDiff) {
+            $sql = array_merge($sql, $platform->getAlterTableSQL($tableDiff));
+        }
+
+        return $sql;
+    }
+}
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