;
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function delete( $table, $where, $where_format = null ) {
		do_action( 'w3tc_db_delete', $table, $where, $where_format );
		return $this->active_processor->delete( $table, $where, $where_format );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function init_charset() {
		return $this->active_processor->init_charset();
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function set_charset( $dbh, $charset = null, $collate = null ) {
		return $this->active_processor->set_charset( $dbh, $charset, $collate );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function set_sql_mode( $modes = array() ) {
		return $this->active_processor->set_sql_mode( $modes );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function flush() {
		return $this->active_processor->flush();
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function check_database_version( $dbh_or_table = false ) {
		return $this->active_processor->check_database_version( $dbh_or_table );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function supports_collation( $dbh_or_table = false ) {
		return $this->active_processor->supports_collation( $dbh_or_table );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function has_cap( $db_cap, $dbh_or_table = false ) {
		return $this->active_processor->has_cap( $db_cap, $dbh_or_table );
	}

	/**
	 * Overriten logic of wp_db by processor.
	 */
	public function db_version( $dbh_or_table = false ) {
		return $this->active_processor->db_version( $dbh_or_table );
	}

	/**
	 * Default initialization method, calls wp_db apropriate method
	 */
	public function default_initialize() {
		parent::__construct( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_insert( $table, $data, $format = null ) {
		return parent::insert( $table, $data, $format );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_query( $query ) {
		return parent::query( $query );
	}

	public function default__escape( $data ) {
		return parent::_escape( $data );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_prepare( $query, $args ) {
		return parent::prepare( $query, ...$args );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_replace( $table, $data, $format = null ) {
		return parent::replace( $table, $data, $format );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_update( $table, $data, $where, $format = null, $where_format = null ) {
		return parent::update( $table, $data, $where, $format, $where_format );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_delete( $table, $where, $where_format = null ) {
		return parent::delete( $table, $where, $where_format );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_init_charset() {
		return parent::init_charset();
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_set_charset( $dbh, $charset = null, $collate = null ) {
		return parent::set_charset( $dbh, $charset, $collate );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_set_sql_mode( $modes = array() ) {
		return parent::set_sql_mode( $modes );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_flush() {
		return parent::flush();
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_check_database_version( $dbh_or_table = false ) {
		return parent::check_database_version( $dbh_or_table );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_supports_collation( $dbh_or_table = false ) {
		return parent::supports_collation( $dbh_or_table );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_has_cap( $db_cap, $dbh_or_table = false ) {
		return parent::has_cap( $db_cap, $dbh_or_table );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function default_db_version( $dbh_or_table = false ) {
		return parent::db_version( $dbh_or_table );
	}

	/**
	 * Default implementation, calls wp_db apropriate method
	 */
	public function switch_active_processor( $offset ) {
		$new_processor_number = $this->active_processor_number + $offset;
		if ( $new_processor_number <= 0 ) {
			$new_processor_number = 0;
		} else if ( $new_processor_number >= count( $this->processors ) ) {
				$new_processor_number = count( $this->processors ) - 1;
			}

		$offset_made = $new_processor_number - $this->active_processor_number;
		$this->active_processor_number = $new_processor_number;
		$this->active_processor = $this->processors[$new_processor_number];

		return $offset_made;
	}
}



/**
 * class CallUnderlying
 */
class _CallUnderlying {
	function __construct( $manager ) {
		$this->wpdb_mixin = $manager;
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function initialize() {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->initialize();

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function flush() {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->flush();

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function query( $query ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->query( $query );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function _escape( $data ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->_escape( $data );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function prepare( $query, $args ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->prepare( $query, ...$args );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function insert( $table, $data, $format = null ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->insert( $table, $data, $format );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function replace( $table, $data, $format = null ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->replace( $table, $data, $format );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	/**
	 * Calls underlying processor's aproptiate method of wp_db
	 */
	function update( $table, $data, $where, $format = null, $where_format = null ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->update( $table, $data, $where, $format, $where_format );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}

	function delete( $table, $where, $where_format = null ) {
		$switched = $this->wpdb_mixin->switch_active_processor( 1 );

		try {
			$r = $this->wpdb_mixin->delete( $table, $where, $where_format );

			$this->wpdb_mixin->switch_active_processor( -$switched );
			return $r;
		} catch ( \Exception $e ) {
			$this->wpdb_mixin->switch_active_processor( -$switched );
			throw $e;
		}
	}
}