public function getFieldTypeCallbacks()
    {
        $types = array();

        $numFields = $this->numFields();
        for( $i = 0; $i < $numFields; $i++ ) {
            $types[pg_field_name( $this->resource, $i )] = TypeConversionFactory::get(
                pg_field_type( $this->resource, $i ),
                $this
            );
        }

        return $types;
    }