Make classes final where applicable.

UPGRADE.md

@@ -40,6 +40,39 @@ If you are using any of the legacy versions, you have to upgrade to newer MariaD
 
 Table columns are no longer indexed by column name. Use the `name` attribute of the column instead.
 
+## BC BREAK: Classes made final
+
+- Class constant `SQLSrvStatement::LAST_INSERT_ID_SQL` was changed from public to private.
+- Class `Doctrine\DBAL\Sharding\ShardChoser\MultiTenantShardChoser` was made final.
+- Class `Doctrine\DBAL\Sharding\SQLAzure\Schema\MultiTenantVisitor` was made final.
+- Class `Doctrine\DBAL\Sharding\SQLAzure\SQLAzureFederationsSynchronizer` was made final.
+- Class `Doctrine\DBAL\Sharding\PoolingShardManager` was made final.
+- Class `Doctrine\DBAL\Id\TableGeneratorSchemaVisitor` was made final.
+- Class `Doctrine\DBAL\Driver\OCI8\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\Mysqli\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\Mysqli\MysqliStatement` was made final.
+- Class `Doctrine\DBAL\Driver\PDOSqlsrv\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\PDOSqlsrv\Statement` was made final.
+- Class `Doctrine\DBAL\Driver\PDOMySql\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\IBMDB2\DB2Connection` was made final.
+- Class `Doctrine\DBAL\Driver\IBMDB2\DB2Statement` was made final.
+- Class `Doctrine\DBAL\Driver\IBMDB2\DB2Driver` was made final.
+- Class `Doctrine\DBAL\Driver\SQLSrv\SQLSrvStatement` was made final.
+- Class `Doctrine\DBAL\Driver\SQLSrv\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\SQLSrv\SQLSrvConnection` was made final.
+- Class `Doctrine\DBAL\Driver\SQLAnywhere\SQLAnywhereConnection` was made final.
+- Class `Doctrine\DBAL\Driver\SQLAnywhere\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\SQLAnywhere\SQLAnywhereStatement` was made final.
+- Class `Doctrine\DBAL\Driver\PDOPgSql\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\PDOOracle\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\PDOSqlite\Driver` was made final.
+- Class `Doctrine\DBAL\Driver\StatementIterator` was made final.
+- Class `Doctrine\DBAL\Cache\ResultCacheStatement` was made final.
+- Class `Doctrine\DBAL\Cache\ArrayStatement` was made final.
+- Class `Doctrine\DBAL\Schema\Synchronizer\SingleDatabaseSynchronizer` was made final.
+- Class `Doctrine\DBAL\Schema\Visitor\RemoveNamespacedAssets` was made final.
+- Class `Doctrine\DBAL\Portability\Statement` was made final.
+
 ## BC BREAK: Changes in the `Doctrine\DBAL\Schema` API
 
 - Column precision no longer defaults to 10. The default value is NULL.

lib/Doctrine/DBAL/Cache/ArrayStatement.php

@@ -17,7 +17,7 @@
 use function reset;
 use function sprintf;
 
-class ArrayStatement implements IteratorAggregate, ResultStatement
+final class ArrayStatement implements IteratorAggregate, ResultStatement
 {
     /** @var mixed[] */
     private $data;

lib/Doctrine/DBAL/Cache/ResultCacheStatement.php

@@ -30,7 +30,7 @@
  * Also you have to realize that the cache will load the whole result into memory at once to ensure 2.
  * This means that the memory usage for cached results might increase by using this feature.
  */
-class ResultCacheStatement implements IteratorAggregate, ResultStatement
+final class ResultCacheStatement implements IteratorAggregate, ResultStatement
 {
     /** @var Cache */
     private $resultCache;

lib/Doctrine/DBAL/Driver/IBMDB2/DB2Connection.php

@@ -22,10 +22,10 @@
 use function db2_rollback;
 use function db2_server_info;
 
-class DB2Connection implements ServerInfoAwareConnection
+final class DB2Connection implements ServerInfoAwareConnection
 {
     /** @var resource */
-    private $conn = null;
+    private $conn;
 
     /**
      * @param array<string, mixed> $params

lib/Doctrine/DBAL/Driver/IBMDB2/DB2Driver.php

@@ -14,7 +14,7 @@
 /**
  * IBM DB2 Driver.
  */
-class DB2Driver extends AbstractDB2Driver
+final class DB2Driver extends AbstractDB2Driver
 {
     /**
      * {@inheritdoc}

lib/Doctrine/DBAL/Driver/IBMDB2/DB2Statement.php

@@ -48,7 +48,7 @@
 use function strtolower;
 use function tmpfile;
 
-class DB2Statement implements IteratorAggregate, Statement
+final class DB2Statement implements IteratorAggregate, Statement
 {
     /** @var resource */
     private $stmt;
@@ -128,21 +128,6 @@ public function bindParam($param, &$variable, int $type = ParameterType::STRING,
         }
     }
 
-    /**
-     * @param int   $position Parameter position
-     * @param mixed $variable
-     *
-     * @throws DB2Exception
-     */
-    private function bind(int $position, &$variable, int $parameterType, int $dataType) : void
-    {
-        $this->bindParam[$position] =& $variable;
-
-        if (! db2_bind_param($this->stmt, $position, 'variable', $parameterType, $dataType)) {
-            throw DB2Exception::fromStatementError($this->stmt);
-        }
-    }
-
     /**
      * {@inheritdoc}
      */
@@ -336,6 +321,21 @@ public function rowCount() : int
         return @db2_num_rows($this->stmt) ? : 0;
     }
 
+    /**
+     * @param int   $position Parameter position
+     * @param mixed $variable
+     *
+     * @throws DB2Exception
+     */
+    private function bind(int $position, &$variable, int $parameterType, int $dataType) : void
+    {
+        $this->bindParam[$position] =& $variable;
+
+        if (! db2_bind_param($this->stmt, $position, 'variable', $parameterType, $dataType)) {
+            throw DB2Exception::fromStatementError($this->stmt);
+        }
+    }
+
     /**
      * Casts a stdClass object to the given class name mapping its' properties.
      *

lib/Doctrine/DBAL/Driver/Mysqli/Driver.php

@@ -8,7 +8,7 @@
 use Doctrine\DBAL\Driver\AbstractMySQLDriver;
 use Doctrine\DBAL\Driver\Connection;
 
-class Driver extends AbstractMySQLDriver
+final class Driver extends AbstractMySQLDriver
 {
     /**
      * {@inheritdoc}