building a MySQL wrapper

gistfile1.aw

class MySQLWrapper {

	private $db = array(
		'host' => null,
		'name' => null,
		'user' => null,
		'pass' => null,
		'pdo' => null
	);

	function __construct( $host, $name, $user, $pass ) {
		$this->db[ 'host' ] = $host;
		$this->db[ 'name' ] = $name;
		$this->db[ 'user' ] = $user;
		$this->db[ 'pass' ] = $pass;
		$this->buildPDO();
	}
	public function setConfig( $args ) {
		if ( !is_array( $args ) ) return;
		$keys = array_keys( $db );
		foreach ( $keys as $key ) if ( isset( $args[ $key ] ) ) $this->db[ $key ] = $args[ $key ];
		$this->buildPDO();
	}
	private function buildPDO() {
		$this->db[ 'pdo' ] = new PDO( 
			'mysql:host=' . $this->db[ 'host' ] . ';' .
			'dbname=' . $this->db[ 'name' ], 
			$this->db[ 'user' ], 
			$this->db[ 'pass' ] 
		);
	}

	public function query( $query ) {
		$statement = $this->db[ 'pdo' ]->query( $query );
		$rows = array();
		while( $rows[] = $statement->fetch( PDO::FETCH_ASSOC ) ) continue;
		return $rows;
	}

	public function getRowsByID( $table, $column, $id ) {
		return $this->query( 'SELECT * FROM ' . $table . ' WHERE ' . $column . ' = ' $id );
	}

	public function updateRowByID( $table, $column, $id, $data ) {
		// TODO generate dataString
		$result = $this->query( 'UPDATE ' . $table . ' SET ' . $dataString . ' WHERE ' . $column . ' = ' $id );

		print_r( $result );

	}

	public function insertRowByID( $table, $column, $id, $data ) {}

	public function setRowByID( $table, $column, $id, $data ) {
		$row = $this->getRows( $table, $column, $id );
		if ( count( $row ) ) return $this->updateRow( $table, $column, $id, $data );
		else return $this->insertRow( $table, $column, $id, $data );
	}

}