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diff --git a/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Schema.php b/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Schema.php
new file mode 100644
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+<?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\DBAL\Schema;
+
+use Doctrine\DBAL\Schema\Visitor\CreateSchemaSqlCollector;
+use Doctrine\DBAL\Schema\Visitor\DropSchemaSqlCollector;
+use Doctrine\DBAL\Schema\Visitor\Visitor;
+
+/**
+ * Object representation of a database schema
+ *
+ * Different vendors have very inconsistent naming with regard to the concept
+ * of a "schema". Doctrine understands a schema as the entity that conceptually
+ * wraps a set of database objects such as tables, sequences, indexes and
+ * foreign keys that belong to each other into a namespace. A Doctrine Schema
+ * has nothing to do with the "SCHEMA" defined as in PostgreSQL, it is more
+ * related to the concept of "DATABASE" that exists in MySQL and PostgreSQL.
+ *
+ * Every asset in the doctrine schema has a name. A name consists of either a
+ * namespace.local name pair or just a local unqualified name.
+ *
+ * The abstraction layer that covers a PostgreSQL schema is the namespace of an
+ * database object (asset). A schema can have a name, which will be used as
+ * default namespace for the unqualified database objects that are created in
+ * the schema.
+ *
+ * In the case of MySQL where cross-database queries are allowed this leads to
+ * databases being "misinterpreted" as namespaces. This is intentional, however
+ * the CREATE/DROP SQL visitors will just filter this queries and do not
+ * execute them. Only the queries for the currently connected database are
+ * executed.
+ *
+ *
+ * @link    www.doctrine-project.org
+ * @since   2.0
+ * @author  Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class Schema extends AbstractAsset
+{
+    /**
+     * @var array
+     */
+    protected $_tables = array();
+
+    /**
+     * @var array
+     */
+    protected $_sequences = array();
+
+    /**
+     * @var SchemaConfig
+     */
+    protected $_schemaConfig = false;
+
+    /**
+     * @param array $tables
+     * @param array $sequences
+     * @param array $views
+     * @param array $triggers
+     * @param SchemaConfig $schemaConfig
+     */
+    public function __construct(array $tables=array(), array $sequences=array(), SchemaConfig $schemaConfig=null)
+    {
+        if ($schemaConfig == null) {
+            $schemaConfig = new SchemaConfig();
+        }
+        $this->_schemaConfig = $schemaConfig;
+        $this->_setName($schemaConfig->getName() ?: 'public');
+
+        foreach ($tables as $table) {
+            $this->_addTable($table);
+        }
+
+        foreach ($sequences as $sequence) {
+            $this->_addSequence($sequence);
+        }
+    }
+
+    /**
+     * @return bool
+     */
+    public function hasExplicitForeignKeyIndexes()
+    {
+        return $this->_schemaConfig->hasExplicitForeignKeyIndexes();
+    }
+
+    /**
+     * @param Table $table
+     */
+    protected function _addTable(Table $table)
+    {
+        $tableName = $table->getFullQualifiedName($this->getName());
+        if(isset($this->_tables[$tableName])) {
+            throw SchemaException::tableAlreadyExists($tableName);
+        }
+
+        $this->_tables[$tableName] = $table;
+        $table->setSchemaConfig($this->_schemaConfig);
+    }
+
+    /**
+     * @param Sequence $sequence
+     */
+    protected function _addSequence(Sequence $sequence)
+    {
+        $seqName = $sequence->getFullQualifiedName($this->getName());
+        if (isset($this->_sequences[$seqName])) {
+            throw SchemaException::sequenceAlreadyExists($seqName);
+        }
+        $this->_sequences[$seqName] = $sequence;
+    }
+
+    /**
+     * Get all tables of this schema.
+     *
+     * @return array
+     */
+    public function getTables()
+    {
+        return $this->_tables;
+    }
+
+    /**
+     * @param string $tableName
+     * @return Table
+     */
+    public function getTable($tableName)
+    {
+        $tableName = $this->getFullQualifiedAssetName($tableName);
+        if (!isset($this->_tables[$tableName])) {
+            throw SchemaException::tableDoesNotExist($tableName);
+        }
+
+        return $this->_tables[$tableName];
+    }
+
+    /**
+     * @return string
+     */
+    private function getFullQualifiedAssetName($name)
+    {
+        if ($this->isIdentifierQuoted($name)) {
+            $name = $this->trimQuotes($name);
+        }
+        if (strpos($name, ".") === false) {
+            $name = $this->getName() . "." . $name;
+        }
+        return strtolower($name);
+    }
+
+    /**
+     * Does this schema have a table with the given name?
+     *
+     * @param  string $tableName
+     * @return Schema
+     */
+    public function hasTable($tableName)
+    {
+        $tableName = $this->getFullQualifiedAssetName($tableName);
+        return isset($this->_tables[$tableName]);
+    }
+
+    /**
+     * Get all table names, prefixed with a schema name, even the default one
+     * if present.
+     *
+     * @return array
+     */
+    public function getTableNames()
+    {
+        return array_keys($this->_tables);
+    }
+
+    public function hasSequence($sequenceName)
+    {
+        $sequenceName = $this->getFullQualifiedAssetName($sequenceName);
+        return isset($this->_sequences[$sequenceName]);
+    }
+
+    /**
+     * @throws SchemaException
+     * @param  string $sequenceName
+     * @return \Doctrine\DBAL\Schema\Sequence
+     */
+    public function getSequence($sequenceName)
+    {
+        $sequenceName = $this->getFullQualifiedAssetName($sequenceName);
+        if(!$this->hasSequence($sequenceName)) {
+            throw SchemaException::sequenceDoesNotExist($sequenceName);
+        }
+        return $this->_sequences[$sequenceName];
+    }
+
+    /**
+     * @return \Doctrine\DBAL\Schema\Sequence[]
+     */
+    public function getSequences()
+    {
+        return $this->_sequences;
+    }
+
+    /**
+     * Create a new table
+     *
+     * @param  string $tableName
+     * @return Table
+     */
+    public function createTable($tableName)
+    {
+        $table = new Table($tableName);
+        $this->_addTable($table);
+
+        foreach ($this->_schemaConfig->getDefaultTableOptions() as $name => $value) {
+            $table->addOption($name, $value);
+        }
+
+        return $table;
+    }
+
+    /**
+     * Rename a table
+     *
+     * @param string $oldTableName
+     * @param string $newTableName
+     * @return Schema
+     */
+    public function renameTable($oldTableName, $newTableName)
+    {
+        $table = $this->getTable($oldTableName);
+        $table->_setName($newTableName);
+
+        $this->dropTable($oldTableName);
+        $this->_addTable($table);
+        return $this;
+    }
+
+    /**
+     * Drop a table from the schema.
+     *
+     * @param string $tableName
+     * @return Schema
+     */
+    public function dropTable($tableName)
+    {
+        $tableName = $this->getFullQualifiedAssetName($tableName);
+        $table = $this->getTable($tableName);
+        unset($this->_tables[$tableName]);
+        return $this;
+    }
+
+    /**
+     * Create a new sequence
+     *
+     * @param  string $sequenceName
+     * @param  int $allocationSize
+     * @param  int $initialValue
+     * @return Sequence
+     */
+    public function createSequence($sequenceName, $allocationSize=1, $initialValue=1)
+    {
+        $seq = new Sequence($sequenceName, $allocationSize, $initialValue);
+        $this->_addSequence($seq);
+        return $seq;
+    }
+
+    /**
+     * @param string $sequenceName
+     * @return Schema
+     */
+    public function dropSequence($sequenceName)
+    {
+        $sequenceName = $this->getFullQualifiedAssetName($sequenceName);
+        unset($this->_sequences[$sequenceName]);
+        return $this;
+    }
+
+    /**
+     * Return an array of necessary sql queries to create the schema on the given platform.
+     *
+     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
+     * @return array
+     */
+    public function toSql(\Doctrine\DBAL\Platforms\AbstractPlatform $platform)
+    {
+        $sqlCollector = new CreateSchemaSqlCollector($platform);
+        $this->visit($sqlCollector);
+
+        return $sqlCollector->getQueries();
+    }
+
+    /**
+     * Return an array of necessary sql queries to drop the schema on the given platform.
+     *
+     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
+     * @return array
+     */
+    public function toDropSql(\Doctrine\DBAL\Platforms\AbstractPlatform $platform)
+    {
+        $dropSqlCollector = new DropSchemaSqlCollector($platform);
+        $this->visit($dropSqlCollector);
+
+        return $dropSqlCollector->getQueries();
+    }
+
+    /**
+     * @param Schema $toSchema
+     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
+     */
+    public function getMigrateToSql(Schema $toSchema, \Doctrine\DBAL\Platforms\AbstractPlatform $platform)
+    {
+        $comparator = new Comparator();
+        $schemaDiff = $comparator->compare($this, $toSchema);
+        return $schemaDiff->toSql($platform);
+    }
+
+    /**
+     * @param Schema $fromSchema
+     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
+     */
+    public function getMigrateFromSql(Schema $fromSchema, \Doctrine\DBAL\Platforms\AbstractPlatform $platform)
+    {
+        $comparator = new Comparator();
+        $schemaDiff = $comparator->compare($fromSchema, $this);
+        return $schemaDiff->toSql($platform);
+    }
+
+    /**
+     * @param Visitor $visitor
+     */
+    public function visit(Visitor $visitor)
+    {
+        $visitor->acceptSchema($this);
+
+        foreach ($this->_tables as $table) {
+            $table->visit($visitor);
+        }
+        foreach ($this->_sequences as $sequence) {
+            $sequence->visit($visitor);
+        }
+    }
+
+    /**
+     * Cloning a Schema triggers a deep clone of all related assets.
+     *
+     * @return void
+     */
+    public function __clone()
+    {
+        foreach ($this->_tables as $k => $table) {
+            $this->_tables[$k] = clone $table;
+        }
+        foreach ($this->_sequences as $k => $sequence) {
+            $this->_sequences[$k] = clone $sequence;
+        }
+    }
+}